EP3050/EP4050

GENERAL,
MECHANICAL/
ELECTRICAL
 CONTENTS
GENERAL
1. SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-1
2. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-2
3. SPACE REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-6
4. PRECAUTIONS FOR INSTALLATION . . . . . . . . . . . . . . . . . . . . . G-7
5. PRECAUTIONS FOR USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-8
6. HANDLING OF THE CONSUMABLES . . . . . . . . . . . . . . . . . . . . . G-9
7. SYSTEM OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-10
8. PARTS IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-11
9. CONTROL PANEL KEYS AND TOUCH PANEL . . . . . . . . . . . . . . G-12
9-1. Control Panel Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-12
9-2. Touch Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G-14

MECHANICAL/ELECTRICAL
1. CROSS-SECTIONAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-1
2. COPY PROCESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-2
3. DRIVE SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-4
4. SEQUENTIAL EXPLANATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-5
5. WATCHDOG (CPU OVERRUN MONITOR) FUNCTION . . . . . . . M-8
5-1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-8
5-2. Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-8
5-3. Watchdog Function Post-Processing . . . . . . . . . . . . . . . . . . . M-9
6. MALFUNCTION BYPASS FUNCTION. . . . . . . . . . . . . . . . . . . . . . M-11
6-1. Overview of the Malfunction Bypass Function . . . . . . . . . . . . M-11
6-2. Candidates for Isolated Malfunctions . . . . . . . . . . . . . . . . . . . M-11
7. IMAGE STABILIZATION SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . M-12
7-1. Overview of the Image Stabilization System . . . . . . . . . . . . . M-12
7-2. AIDC Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-14
7-3. AIDC Sensor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-15
8. PC DRUM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-25
8-1. PC Drum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-25

i
 CONTENTS
8-2. Drive and Ground for the PC Drum . . . . . . . . . . . . . . . . . . . . M-25
8-3. Drum Dehumidifying Heater . . . . . . . . . . . . . . . . . . . . . . . . . . M-26
9. DRUM CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-27
9-1. PC Drum Charge Corona . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-27
9-2. Control of the PC Drum Charge Corona . . . . . . . . . . . . . . . . M-28
9-3. PC Drum Charge Corona Wire Take-Up Mechanism/
Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-29
9-4. Ozone Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-32
10. OPTICAL SECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-33
10-1. Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-33
10-2. Exposure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-34
10-3. Exposure Lamp Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-35
10-4. Intensity Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-39
10-5. Scanner and 2nd/3rd Mirrors
Carriage Moving Mechanism . . . . . . . . . . . . . . . . . . . . . . . . M-40
10-6. Scanner Motor M2 Control . . . . . . . . . . . . . . . . . . . . . . . . . . M-40
10-7. Lens Drive Mechanism/Control . . . . . . . . . . . . . . . . . . . . . . . M-44
10-8. 4th/5th Mirrors Carriage Positioning Mechanism/Control . . M-49
11. ORIGINAL SIZE DETECTING SYSTEM . . . . . . . . . . . . . . . . . . . . M-53
11-1. Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-53
11-2. Original Size Detecting Sensors (PC115 to PC119) . . . . . . M-54
(1) Construction of Each Sensor. . . . . . . . . . . . . . . . . . . . . . M-54
(2) Original Detection Method . . . . . . . . . . . . . . . . . . . . . . . . M-55
(3) Sensor Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-56
11-3. Original Size Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-57
(1) Size Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-57
(2) Original Size Detection Processing . . . . . . . . . . . . . . . . M-58
11-4. Original Size Detection Circuit . . . . . . . . . . . . . . . . . . . . . . . M-59
12. IMAGE ERASE LAMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-60
12-1. Image Erase Lamp LA2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-60
12-2. Image Erase Lamp LA2 ON/OFF Control . . . . . . . . . . . . . . M-61
(1) ON/OFF Control Data Output . . . . . . . . . . . . . . . . . . . . . M-61
(2) Leading Edge Erase. . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-61
(3) Edge Erase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-62
(4) Trailing Edge Erase . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-64
(5) Center Erase. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-64
(6) 2-in-1 Erase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-65
12-3. Image Erase Lamp LA2 Circuit . . . . . . . . . . . . . . . . . . . . . . . M-66

ii
 CONTENTS
13. DEVELOPING UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-67
13-1. Construction and Function . . . . . . . . . . . . . . . . . . . . . . . . . . M-67
13-2. Developing Unit Drive Mechanism . . . . . . . . . . . . . . . . . . . . M-68
13-3. Developer Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-70
13-4. Magnetic Pole Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . M-72
13-5. ATDC Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-74
13-6. ATDC Sensor Self Recovery Function . . . . . . . . . . . . . . . . . M-77
13-7. Sub Hopper Toner Replenishing Mechanism/Control . . . . . M-81
13-8. Sub Hopper Toner Empty Detection Control . . . . . . . . . . . . M-83
13-9. Main Hopper Toner Replenishing Mechanism/Control . . . . M-86
13-10. Swing Out/In the Main Hopper . . . . . . . . . . . . . . . . . . . . . . M-88
13-11. Developing Bias . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-89
14. PAPER TAKE-UP/FEED SECTION . . . . . . . . . . . . . . . . . . . . . . . . M-90
14-1. Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-90
14-2. Drawer-in-Position Detection . . . . . . . . . . . . . . . . . . . . . . . . M-91
14-3. Drawer Paper Lifting/Lowering Mechanism/Control . . . . . . M-92
(1) Metric Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-92
(2) Inch Area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-94
14-4. Paper Level Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-98
14-5. Paper Empty Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-99
(1) Metric Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-99
(2) Inch Area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-100
(3) Control for 1st/2nd Drawer Paper Empty Detection . . . M-101
14-6. Paper Take-Up Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . M-102
(1) Paper Take-Up Mechanism. . . . . . . . . . . . . . . . . . . . . . . M-102
(2) Paper Separating Mechanism . . . . . . . . . . . . . . . . . . . . . M-103
(3) Paper Pressure Releasing Mechanism . . . . . . . . . . . . . M-104
(4) Paper Take-Up Roll retraction Mechanism . . . . . . . . . . M-104
14-7. Vertical Transport Drive Mechanism . . . . . . . . . . . . . . . . . . M-105
14-8. Paper Take-Up Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-106
(1) Paper Take-Up Motor Control . . . . . . . . . . . . . . . . . . . . . M-106
(2) Paper Take-Up Retry Control . . . . . . . . . . . . . . . . . . . . . M-107
(3) Paper Take-Up Interval Control . . . . . . . . . . . . . . . . . . . M-107
(4) Double Feed Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-108
(5) Vertical Transport Drive Control . . . . . . . . . . . . . . . . . . . M-109
14-9. Multi Bypass Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-110
(1) Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-110
(2) Paper Take-Up Mechanism. . . . . . . . . . . . . . . . . . . . . . . M-111
(3) Take-Up/Feed Rolls Drive Mechanism . . . . . . . . . . . . . . M-112

iii
 CONTENTS
(4) Manual Bypass Paper Separating Mechanism . . . . . . . M-113
(5) Manual Bypass Paper Empty Detection . . . . . . . . . . . . . M-114
(6) Manual Bypass Take-Up Roll Control . . . . . . . . . . . . . . M-115
14-10. Detection of Right Upper Door in Position . . . . . . . . . . . . . M-116
14-11. Paper Dehumidifying Heater . . . . . . . . . . . . . . . . . . . . . . . . M-117
15. SYNCHRONIZING ROLLERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-118
15-1. Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-118
15-2. Synchronizing Roller Drive Mechanism . . . . . . . . . . . . . . . . M-119
15-3. Paper Dust Remover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-119
15-4. Synchronizing Roller Drive Control. . . . . . . . . . . . . . . . . . . . M-120
15-5. Prevention of Low Image Density on Copy . . . . . . . . . . . . . M-121
16. IMAGE TRANSFER/PAPER SEPARATOR CORONAS . . . . . . . . M-123
16-1. Construction and Functions of Image
Transfer/Paper Separator Coronas Unit . . . . . . . . . . . . . . . M-123
16-2. Image Transfer/Paper Separator Coronas Control . . . . . . . M-125
16-3. Ozone Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-126
17. CLEANING UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-127
17-1. Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-127
17-2. Cleaning Blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-128
(1) Cleaning Blade Pressure Mechanism. . . . . . . . . . . . . . . M-128
(2) Cleaning Blade Moving Mechanism . . . . . . . . . . . . . . . . M-128
17-3. Spent Toner Collection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-129
(1) Toner Conveying/Collecting Mechanism . . . . . . . . . . . . M-129
(2) Detection of Toner Collecting Box in Position . . . . . . . . M-130
17-4. PC Drum Paper Separator Fingers Moving
Mechanism/Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-132
17-5. Cleaning Bias (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-135
18. MAIN ERASE LAMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-136
18-1. Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-136
18-2. Main Erase Lamp LA3 ON/OFF Control. . . . . . . . . . . . . . . . M-137
19. PAPER TRANSPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-138
19-1. Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-138
19-2. Suction Belt Drive Mechanism . . . . . . . . . . . . . . . . . . . . . . . M-139
19-3. Suction Fan Motor M4 Drive Control . . . . . . . . . . . . . . . . . . M-140
20. FUSING UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-141
20-1. Construction and Drive Train . . . . . . . . . . . . . . . . . . . . . . . . M-141
20-2. Fusing Rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-142

iv
 CONTENTS
20-3. Fusing Rollers Pressure Mechanism . . . . . . . . . . . . . . . . . . M-142
20-4. Fusing Roller Cleaning Mechanism . . . . . . . . . . . . . . . . . . . M-143
20-5. Paper Separator Fingers . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-144
20-6. Fusing Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . M-145
21. EXIT UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-149
21-1. Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-149
21-2. Exit Unit Drive Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . M-149
21-3. Exit/Duplex Switching Mechanism/Control . . . . . . . . . . . . . M-150
21-4. Paper Exit Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-151
21-5. Detection of Left Upper Door in Position . . . . . . . . . . . . . . . M-152
22. TOTAL COUNTER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-153
22-1. Detection of Total Counter in Position . . . . . . . . . . . . . . . . . M-153
22-2. CT1 Count-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-153
23. POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-154
24. MEMORY BACKUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .M-158

v
GENERAL
 1 SAFETY INFORMATION
(ALL Areas)
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type
recommended by the manufacturer.
Dispose of used batteries according
to the manufacturer’s instructions.

(Denmark only)
ADVARSEL!
Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri
af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.

(Norway only)
ADVARSEL
Eksplosjonsfare ved feilaktig skifte av batteri.
Benytt samme batteritype eller en tilsvarende
type anbefalt av apparatfabrikanten.
Brukte batterier kasseres i henhold til fabrikantens
instruksjoner.

(Sweden only)
VARNING
Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en ekvivalent
typ som rekommenderas av apparattillverkaren.
Kassera använt batteri enligt fabrikantens
instruktion.

(Finland only)
VAROITUS
Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan
tyyppiin. Hävitä Käytetty paristo valmistajan ohjeiden
mukaisesti.

G-1
 2 SPECIFICATIONS
TYPE : Desktop (with Stationary Platen)
PHOTOCONDUCTOR : Organic Photoconductor
COPYING SYSTEM : Electrostatic Dry Powdered Image Transfer to Plain
Paper
PAPER FEEDING : 3-Way Feeding 1st Drawer: Fixed Paper Size Tray
SYSTEM (500 sheets of paper)
2nd Drawer: Fixed Paper Size Tray
(500 sheets of paper)
Multi Bypass Table
(50 sheets of paper)
EXPOSURE SYSTEM : Mirror Scanning, Slit Exposure
DEVELOPING SYSTEM : Minolta New Micro-Toning System
CHARGING SYSTEM : Single-Wire DC Negative Corona with Scorotron System
IMAGE TRANSFER : Visible Image Transfer by means of a Single-Wire DC
SYSTEM Negative Corona with Corotron System
PAPER SEPARATING : Single-Wire AC Corona with Corotron System, positive
SYSTEM DC bias voltage, and Paper Separator Fingers
PC DRUM CLEANING : By means of Cleaning Blade
OZONE REMOVAL : By means of Ozone Filter
FUSING SYSTEM : Heat Roller
PAPER DISCHARGING : Charge Neutralizing Brush
SYSTEM
TYPES OF ORIGINALS : sheets, books, and other three-dimensional objects
weighing up to 3kg (6-1/2 lbs.)
MAXIMUM ORIGINAL : A3L or 11" × 17"L (L: Lengthwise)
SIZE

COPY MEDIUM:

1st/2nd Drawer Multi Bypass Table

Plain paper
O O
(60 to 90 g/m 2 )
Translucent paper — O *1
Medium

Transparencies — O *1
Thick paper *1
— O
(91 to 157 g/m 2)
Recycled paper O O *1
Dimensions

Maximum
297 × 432 mm 297 × 432 mm
(Width × Length)
Minimum
140 × 182 mm 100 × 140 mm
(Width × Length)

O: Permissible —: Not permissible ∗1: 20 sheets or less

G-2
WARMING-UP TIME : 150 sec. or less with room temperature of 23°C and rated
power voltage
WARMING-UP TIME : 30 sec. or less with room temperature of 23°C and rated
AFTER ENERGY SAVER power voltage
AUTO CLEAR TIME : 60 ± 2 sec.
FIRST COPY TIME : A4C or 8-1/2" × 11"C from 1st Drawer: 4.1 sec. or less

CONTINUOUS COPY SPEED (copies/min., fed from 1st Drawer)

<EP4050>
Metric Areas Inch Areas

Zoom Zoom
Ratio
×1.000 ×0.500 ×2.000
Ratio
×1.000 ×0.500 ×2.000
Size Size
A3L 25 25 25 11" × 17" 25 25 25
B4L 29 29 29 8-1/2" × 11" L 37 37 31
A4L 34 34 30 8-1/2" × 11" C 45 42 31
A4C 45 43 31
B5L 39 39 31
B5C 45 45 31

L: Lengthwise; C: Crosswise

<EP3050>
Metric Areas Inch Areas
Zoom Zoom
Ratio
×1.000 ×0.500 ×2.000 Ratio
×1.000 ×0.500 ×2.000
Size Size
A3L 20 20 20 11" × 17" 20 20 20
B4L 22 22 22 8-1/2" × 11" L 29 29 29
A4L 27 27 27 8-1/2" × 11" C 35 35 30
A4C 35 35 30
B5L 30 30 30
B5C 35 35 31

L: Lengthwise; C: Crosswise

MULTIPLE COPIES : 1 to 999 (count-down system)

G-3
ZOOM RATIOS:

Area
Metric Inch
Mode
Fixed Full Size × 1.000 × 1.000
Reduction × 0.816 × 0.785
× 0.707 × 0.733
× 0.500 × 0.647
× 0.500
Enlargement × 2.000 × 2.000
× 1.414 × 1.545
× 1.154 × 1.294
× 1.214
Variable × 0.500 to × 2.000 (in 0.001 increments)

LENS : Through Lens (F = 6.0, f = 190 mm)

EXPOSURE LAMP : Halogen Frost Tube Lamp
FUSING : In standby, during a copy cycle = 200°C
TEMPERATURE In Energy Saver = 180°C

POWER/CURRENT CONSUMPTION
Copier only:

Exposure Fusing Heater Max. Power

Voltage In Standby
Lamp (Rating) Lamp (Rating) Consumption
80 V 115, 127 V
115, 127 V 1200 W 900 W
230 W 850 W
80 V 120 V
120 V 1260 W 960 W
230 W 850 W
160 V 220 V 1220 ~ 900 ~
200 ~ 220 V
250 W 850 W 1350 W 1020 W
160 V 220 V 1220 ~ 900 ~
220 ~ 240 V
250 W 850 W 1350 W 1020 W

G-4
Copier with Complete Options:

Voltage Max. Power Consumption Max. Current Consumption

115 V 1300 W 12 A
120 V 1340 W 12 A
127 V 1300 W 11 A
200 ~ 220 V 1350 ~ 1490 W 7.5 A
220 ~ 240 V 1350 ~ 1490 W 6.8 A

POWER : 115 V, 120 V, 127 V, 200 V, 220 V, 230 V, 240 V;

REQUIREMENTS 50/60 Hz

ENVIRONMENTAL CONDITIONS:

Temperature 10 to 35°C with a fluctuation of 10°C or less per hour

Humidity 15 to 85% RH with a fluctuation of 20% RH or less per hour
Ambient Illumination 3,000 lux or less
Levelness 1° (1.75 mm/100 mm)

DIMENSIONS : Width .... 620 mm or 24-1/2" (Excluding Copy Tray)

Depth .... 685 mm or 27"
Height ... 595 mm or 23-1/2" (up to Original Glass surface)
WEIGHT : 86 kg or 189 lbs (Excluding Copy Tray, Stater, Toner,
Copy Paper)
STANDARD : Copy Tray, PC Drum, Starter, Operator’s Manual,
ACCESSORIES Unpacking/Setting-up Instructions

G-5
 3 SPACE REQUIREMENTS
To ensure easy copier operation, supply replacement, and service
maintenance, adhere to the recommended space requirements detailed
below.

* Be sure to allow a clearance of 150 mm (6") or more at the back of the

copier as there is a ventilation duct.

EP4050/EP3050 4 Way
1,160 mm or 45-3/4"
740 mm or 29-1/4"

1,380 mm or 54-1/4"
380 mm or 15"
380 mm
or 15" 1,459 mm or 57-1/2"

961 mm or 37-3/4"
390 mm or 15-1/4"
990 mm or 39"

EP4050/EP3050 with a Complete Lineup of Options

1,340 mm or 52-3/4"

1,845 mm or 72-3/4"

1,300 mm or 51-1/4"
1,463 mm or 57-1/2"
1,221 mm or 48"

1,160 mm or 45-3/4"

1134O086CA

G-6
4 PRECAUTIONS FOR INSTALLATION
Installation Site
To ensure safety and utmost performance of the copier, the copier should
NOT be used in a place:
● Where it will be subject to extremely high or low temperature or
humidity.
● Which is exposed to direct sunlight.
● Which is in the direct air stream of an air conditioner, heater or
ventilator.
● Which puts the operator in the direct stream of exhaust from the copier.
● Which has poor ventilation.
● Where ammonia gas might be generated.
● Which does not have a stable, level floor.
● Where it will be subject to sudden fluctuations in either temperature or
humidity. If a cold room is quickly heated, condensation forms inside
the copier, resulting in blank spots in the copy.
● Which is near any kind of heating device.
● Where it may be splashed with water.
● Which is dirty or where it will receive undue vibration.
● Which is near volatile flammables or curtains.

Power Source
Use an outlet with a capacity of 115/120/127V, 12A or more, or
200/220/230/240V, 7.5A or more.
● If any other electrical equipment is sourced from the same power
outlet, make sure that the capacity of the outlet is not exceeded.
● Use a power source with little voltage fluctuation.
● Never connect by means of a multiple socket any other appliances or
machines to the outlet being used for the copier.
● Make the following checks at frequent intervals:
• Is the power plug abnormally hot?
• Are there any cracks or scrapes in the cord?
• Has the power plug been inserted fully into the outlet?
• Does something, including the copier itself, ride on the power cord?
● Ensure that the copier does not ride on the power cord or
communications cable of other electrical equipment, and that it does
not become wedged into or underneath the mechanism.
Grounding
To prevent receiving electrical shocks in the case of electrical leakage,
always ground the copier.
● Connect the grounding wire to:
• The ground terminal of the outlet.
• A grounding contact which complies with the local electrical standards.
● Never connect the grounding wire to a gas pipe, the grounding wire for
a telephone, or a water pipe.

G-7
5 PRECAUTIONS FOR USE
To ensure that the copier is used in an optimum condition, observe the
following precautions.
● Never place a heavy object on the copier or subject the copier to
shocks.
● Insert the power plug all the way into the outlet.
● Do not attempt to remove any panel or cover which is secured while the
copier is making copies.
● Do not turn OFF the Power Switch while the copier is making copies.
● Provide good ventilation when making a large number of copies
continuously.
● Never use flammable sprays near the copier.
● If the copier becomes inordinately hot or produces abnormal noise, turn
it OFF and unplug it.
● Do not turn ON the Power Switch at the same time when you plug the
power cord into the outlet.
● When unplugging the power cord, do not pull on the cord; hold the plug
and pull it out.
● Do not bring any magnetized object near the copier.
● Do not place a vase or vessel containing water on the copier.
● Be sure to turn OFF the Power Switch at the end of the workday or
upon power failure.
● Use care not to drop paper clips, staples, or other small pieces of metal
into the copier.

Operating Environment
The operating environmental requirements of the copier are as follows.
• Temperature: 10°C to 30°C with a fluctuation of 10°C per hour
• Humidity: 15% to 85% RH with a fluctuation of 20% RH per hour

Power Requirements
The power source voltage requirements are as follows.
• Voltage Fluctuation: AC115/120/127/200/220/230/240V
±10% (Copying performance assured)
−15% (Paper feeding performance
assured)
• Frequency Fluctuation: 50/60 Hz ±0.3%

G-8
6 HANDLING OF THE CONSUMABLES
Before using any consumables, always read the label on its container
carefully.
● Use the right toner. The applicable copier model name is indicated on
the Toner Bottle.
● Paper is apt to be easily damaged by dampness. To prevent
absorption of moisture, store paper, which has been removed from its
wrapper but not loaded into the Drawer, in a sealed plastic bag in a
cool, dark place.
● Keep consumables out of the reach of children.
● Do not touch the PC Drum with bare hands.
● Store the paper, toner, and other consumables in a place free from
direct sunlight and away from any heating apparatus.
● The same sized paper is of two kinds, short grain and long grain. Short
grain paper should only be fed through the copier crosswise, long grain
paper should only be fed lengthwise.
● If your hands become soiled with toner, wash them with soap and
water immediately.
● Do not throw away any used consumables (PC Drum, starter, toner,
etc.). They are to be collected.

NOTE
Do not burn, bury in the ground, or throw into the water any
consumables (PC Drum, starter, toner, etc.).

G-9
 7 SYSTEM OPTIONS
2
1

1139O0010A 1138O525AA

10 3

1139O0020A

1136O061AA

1139O0030A
5
1139O018AA

1136O059AA 1136O059AA
9 8
1139O1222A
1139O1212A
7

1. Duplexing Document Feeder AFR-9

2. Data Controller D-102
3. Large Capacity Cassette C-301
4. Duplex Unit AD-5
5. Paper Feed Cabinet PF-2D
6. Paper Feed Cabinet PF-202
(Except USA, CANADA)
7. Paper Feed Cabinet PF-102
8. 20-Bin Sorter S-205
9. Staple Sorter ST-206
10. Staple Sorter ST-101
(For EP3050 only)

G-10
8 PARTS IDENTIFICATION

Left Door Lock Original Cover

Control Panel
Release Lever
Manual Bypass Table
Front Door
Exit Tray

1st Drawer
Power Switch
2nd Drawer
Right Door Lock
Release Lever
Total Counter

Original Pad

Original Glass
Toner Bottle

Toner Bottle Holder

Right Door

Display Contrast
Control Knob
Transport Section
Release Lever

G-11
 9 CONTROL PANEL KEYS AND TOUCH PANEL
* For more details, see the "Operator’s Manual" shipped together with the
copier.
9-1. Control Panel Keys
1 2 3

User Mode Auxiliary Finishing Orig. Copy Basic

1 2 3 4
Ready to Copy 4 5 6
1 5
7 8 9
Auto Exp. x1.000 Auto Paper
Job Recall

0 C 6
Exposure Zoom Paper

Mode Check
7

1134P476DA
12 11 10 9 8 1134P476DA

1 User Mode Key

• Shows the User Mode setting screen on the Touch Panel. It looks like
as follows.

User Mode Exit

Select a function by pressing the

key.

Data Send

Job Memory Zoom Mem- Meter

Input ory Input Count

Toner Re- Drum De- User's

Plenisher humidifier Choice

1134P359CA

Data Send ∗1 Transmits the copier condition to the center when a DT-103 is installed
on the copier.
Job Memory Input Stores in memory up to 10 different, frequently used copying-job
programs and recalls them later as necessary. If "Copy Track" has
been turned ON in the "Administrator Mode" of User’s Choice, five
more jobs can be stored in memory for each account (max. 140 jobs).
Zoom Memory Input Stores in memory up to three different, frequently used zoom ratios.
Meter Count Allows for checking the total count of each of the four different counters
- Total, Size, 2-Sided Total, and 2-Sided Size.
Toner Replenisher Regains the normal image density quickly. If the image density is
sufficiently high, toner is not replenished, but only mixed.
Drum Dehumidifier Dries the surface of the PC Drum, preventing condensation. (The cycle
lasts for about 3 min.)
User’s Choice Allows for selecting the default settings according to the user’s own
needs. (For details, see "SWITCHES ON PWBs.")

∗1: Except the U.S.A. and Canada

G-12
 1 2 3

User Mode Auxiliary Finishing Orig. Copy Basic

1 2 3 4
Ready to Copy 4 5 6
1 5
7 8 9
Auto Exp. x1.000 Auto Paper
Job Recall

0 C 6
Exposure Zoom Paper

Mode Check
7

1134P476DA
12 11 10 9 8 1134P476DA

2 Touch Panel 8 Clear Key

• A large liquid-crystal display is • Clears the number of copies,
used for greater ease of operation. zoom ratio, and other data
including the counter reading.
3 10-Key Pad
• Sets the number of copies to be • Ejects an original fed previously
made, zoom ratio, paper size, onto the Original Glass by the
access number, and other Duplexing Document Feeder.
numeric data including that for the 9 Stop Key
Tech. Rep. mode.
• Stops a multi-copy cycle and a
4 Access Mode Key Test mode operation.
• Enables and disables a copy cycle • Used also in combination with
if "Copy Track" has been turned other keys to enter the Adjust
ON of User’s Choice. mode. (With the Tech. Rep. Mode
Energy Saver Key screen on the Touch Panel, press
5 the Stop Key and then the Start
• Sets the copier into the Energy Key, in that order.)
Saver mode, turning OFF all
control panel indicators except the 10 Start Key
Start Key and Energy Saver Key. • Starts a multi-copy cycle and a
Interrupt Key Test mode operation.
6
• Interrupts a current job with a • Used also in combination with
different one or restores the copier other keys to enter the Adjust
to the previous job. mode. (With the Tech. Rep. Mode
screen on the Touch Panel, press
7 Panel Reset Key the Stop Key and then the Start
• Sets the copier into the initial Key, in that order.)
mode, clearing all settings made
previously on the control panel. 11 Job Recall Key
• Selects the Job Recall screen, on
which the user can recall or check
a copying-job program previously
stored in memory.

12 Mode Check Key

• Selects the Mode Check screen
• From this screen, the user can
access the setting screen of a
particular function and change or
cancel the setting as necessary.

G-13
9-2. Explanation of the Touch Panel
• The screen shown on the Touch Panel is classified into the four types: the
Basic, Warning, User Mode, and Tech. Rep. Mode screens.
• Following is the detailed explanation of what is shown on the Basic and
Warning screens. For details of the User Mode screen, see " 1 User
Mode Key" on p. G-10. For the Tech. Rep. Mode screen, see SWITCHES
ON PWBs.
(1) Basic Screen
• The Basic screen is the initial screen that appears when the power is
turned ON, the control panel is reset, or auto clear function is activated.
1 2 3

Auxiliary Finishing Orig. Copy Basics

Ready to copy.
1 4
Auto Expo. x1.000 Auto Paper
5
8
Exposure Zoom Paper 6

Staple
£

1134P429CA

1 Auxiliary Key
• When the Auxiliary key is touched, the Auxiliary functions menu
screen appears, allowing the operator to select either Cover, Page
Insertion, OHP Interleaving, Book Copy, File Margin, or Edge/Frame
Erase.
• The functions "Cover" and "Page Insertion" appear only if the copier
is equipped with an AFR-9.
2 Finishing Key
• When the Finishing key is touched, a screen appears that allows the
operator to select the finishing type, either Non-Sort, Sort,
Sort-and-Staple, Group, Hole Punch, or Manual Staple.
• The functions other than Non-Sort appear only when the copier is
equipped with a Staple Sorter.
▲

3 Orig. Copy Key

• When the Orig.
▲

Copy key is touched, a screen appears that allows

▲

the operator to set the original copy type.

4 Message Display
• Shows the current copier status, operating instructions or caution,
and other data including the number of copies selected.

G-14
 1 2 3

Auxiliary Finishing Orig. Copy Basics

Ready to copy.
1 4
Auto Expo. x1.000 Auto Paper
5
8
Exposure Zoom Paper 6

Staple

£ 1134P429CA

5 Paper Key
• When the Paper key is touched, a screen appears that allows the
operator to select the paper size.
• The graphic symbol " " appears on the paper size key when the
corresponding drawer runs out of paper.
6 Zoom Key
• When the Zoom key is touched, a screen appears that allows the
operator to select the zoom ratio. The functions available on the
screen are Auto Size, fixed ratios, Zoom Up/Down, and User Set (for
10-Key Pad input and zoom memory).
7 Set Function Display
• Shows graphic representations of functions set other than the initial
▲

ones, including the Orig. Copy and Finishing types.

8 Exposure Key
• When the Exposure key is touched, a screen appears that allows the
operator to select the image density. Available function keys are the
Auto exposure mode key and manual exposure setting keys.

G-15
(2) Warning Screen
• The warning screen may be a malfunction display, error display, warning
display, or a caution display.
• Here are examples to show what kind of information each display gives.

<Malfunction Display> <Error Display>

A malfunction display is given when An error display is given when
trouble occurs which cannot be trouble occurs which can be
corrected by the user and requires corrected by the user.
remedial action by the Tech. Rep. (For example, a door or option left
(For example, a malfunction that loose and a paper misfeed.)
can be identified with a specific
code.)

Misfeed detected.
Remove misfeed at .
A malfunction was detected.
Call your Technical Rep.
and provide the code:

Code:C
TEL :

1134M039AA 1134P347CA

<Warning Display> <Caution Display>

A warning display is given when A caution display is given when,
any further copier operation will not though further copier operation will
be possible, or only faulty results be possible, it could result in a
will come out, due to erroneous malfunction.
panel settings or other cause. (For example, a toner-empty
(For example, unmatched paper condition.)
size in Auto Paper mode.)

Auxiliary Finishing Orig. Copy Basics Auxiliary Finishing Orig. Copy Basics

Matching paper size isn't available. Replenish Toner:MT Toner 401A

Reselect paper size or change zoom. 1
Auto Expo. x1.000 Auto Paper Auto Expo. x1.000 Auto Paper

Exposure Zoom Paper Exposure Zoom Paper

1134M038AA 1134P352CA

Note: For the European market, the

toner is MT Toner 401B.

G-16
MECHANICAL/
ELECTRICAL
 1 CROSS-SECTIONAL VIEW
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

19
44
20
43 21

42

41 22

23

24
25
26
27

28
29
30
40 39 38 37 36 35 34 33 32 31

1. 3rd Mirror 23. Manual Bypass Take-Up Roll

2. 2nd Mirror 24. Manual Bypass Separator Roll
3. 1st Mirror 25. Upper Vertical Transport Roller
4. Exposure Lamp LA1 26. 1st Drawer Feed Roll
5. Original Size Detecting Sensor 27. 1st Drawer Separator Roll
CD1 PC115 28. Lower Vertical Transport Roller
6. Original Size Detecting Sensor 29. 2nd Drawer Feed Roll
CD2 PC119 30. 2nd Drawer Separator Roll
7. Ventilation Fan Motor M3 31. 2nd Drawer Paper Take-Up Roll
8. Ozone Filter 32. 1st Drawer Paper Take-Up Roll
9. Lens 33. Synchronizing Roller
10. Main Erase Lamp LA3 34. Image Transfer/Paper
11. Cleaning Blade Separator Coronas
12. PC Drum Charge Corona 35. Main Drive Motor M1
13. PC Drum 36. Suction Belt
14. Dust-Proof Glass 37. Fusing Thermoswitch TS1
15. 6th Mirror 38. Lower Fusing Roller
16. Image Erase Lamp LA2 39. Upper Fusing Roller
17. 4th Mirror 40. Fusing Paper Separator Finger
18. 5th Mirror 41. 1st Paper Exit Roller
19. Developing Unit 42. 2nd Paper Exit Roller
20. Sub Hopper 43. Exit/Duplex Switching Guide
21. Transport Roller 44. Cleaning Roller
22. Manual Bypass Feed Roll

M-1
 2 COPY PROCESS
2 3

4
10

9 1 5

MULTI BYPASS
13 12 11 8 7 TABLE

1. PC DRUM 8. PAPER SEPARATION

2. DRUM CHARGING 9. CLEANING 6
3. IMAGE ERASE 10. MAIN ERASE
4. EXPOSURE 11. TRANSPORT
5. DEVELOPING 12. FUSING
6. PAPER FEEDING 13. PAPER EXIT
7. IMAGE TRANSFER

1. PC Drum
The PC Drum is an aluminum cylinder coated with a photosensitive semiconductor.
It is used as the medium on which a visible developed image of the original is
formed.
(For more details, see p. M-25.)
2. Drum Charging
The PC Drum Charge Corona Unit is equipped with a single wire and a Scorotron
Grid to deposit a uniform negative charge across the entire surface of the PC Drum.
(For more details, see p. M-27.)
3. Image Erase
Any areas of charge which are not to be developed are neutralized by lighting up
LEDs.
(For more details, see p. M-60.)
4. Exposure
Light from the Exposure Lamp reflected off the original is guided to the surface of
the PC Drum and reduces the level of the negative charges, thereby forming an
electrostatic latent image.
(For more details, see p. M-34.)
5. Developing
Toner positively charged in the Developer Mixing Chamber is attracted onto the
electrostatic latent image changing it to a visible, developed image. A DC negative
bias voltage is applied to the Sleeve/Magnet Roller to prevent toner from being
attracted onto those areas of the PC Drum which correspond to the background
areas of the original.
(For more details, see p. M-67.)

M-2
6. Paper Feeding
Paper is fed either automatically from the 1st or 2nd Drawer, or manually via the
Manual Bypass Table (capacity 50 sheets of paper). Paper separation is
accomplished by the torque limiter fitted to the Paper Separator Roll.
(For more details, see p. M-90.)
7. Image Transfer
The single-wire Image Transfer Corona Unit applies a DC negative corona emission
to the underside of the paper, thereby attracting toner onto the surface of the paper.
(For more details, see p. M-124.)
8. Paper Separation
The single-wire Paper Separator Corona Unit applies an AC corona emission to the
underside of the paper to neutralize the paper. In addition, mechanical paper
separation is provided by the two PC Drum Paper Separator Fingers fitted to the PC
Unit.
(For more details, see p. M-124, 132.)
9. Cleaning
Residual toner on the surface of the PC Drum is scraped off by the Cleaning Blade.
(For more details, see p. M-128.)
10. Main Erase
Light from the Main Erase Lamp neutralizes any surface potential remaining on the
surface of the PC Drum after cleaning.
(For more details, see p. M-136.)
11. Transport
The paper is fed to the Fusing Unit by the Suction Belts.
(For more details, see p. M-138.)
12. Fusing
The developed image is permanently fused to the paper by a combination of heat
and pressure applied by the Upper and Lower Fusing Rollers.
(For more details, see p. M-141.)
13. Paper Exit
After the fusing process the paper is fed out by the Paper Exit Rollers onto the Exit
Tray.
(For more details, see p. M-149.)

M-3
 3 DRIVE SYSTEM
The Main Drive Motor provides drive for the entire mechanism of the copier.
To help minimize operating noise, timing belts and plastic gears are used in
large numbers for the drive train parts.

2nd Paper Exit Roller Drive Gear

Cleaning Roller Drive Gear

Suction Unit Drive Gear

PC Drum Drive Gear
1st Paper Exit
Roller Drive Gear
Developing Section Drive Gear
Upper Fusing Roller
Drive Gear
Manual Feed Paper
Take-Up Clutch Gear

Upper Vertical Toner Conveying Coil Drive

Transport Roller Gear (on PC Unit)
Drive Pulley

Main Drive Motor Gear

Synchronizing Roller Clutch Gear

Paper Transport Clutch Gear

1136M002AA
Lower Vertical Transport Roller Drive Pulley

M-4
 4 SEQUENTIAL EXPLANATION
A The power cord is plugged into the outlet.

ON DC Power Supply Unit PU1 outputs DC24V for dehumidifying

heating.
ON
Drum Dry Heater H3 Only when Drum
ON Dehumidifying Switch S3 and
Paper Dehumidifying Paper Dehumidifying Switch
Heater H2 S12 are ON
B Power Switch S1 is turned ON.

OFF
H2, H3
ON
PU1 outputs DC24V and DC5V.
ON
Power Supply Board PWB-C outputs DC24V.
(DC24V line: ON)
ON
Master Board PWB-A outputs DC4.7V and DC12V.
ON
Control panel display
ON
Suction Fan Motor M4 turns at half speed.
ON
Approx. 1 sec. Fusing Heater Lamp H1
The Lens is detected at the home position.
The Mirror is detected at the
home position.
The Scanner makes its initial motion.
For details, see
The Lens is detected at the OPTICAL SECTION.
full size position.
The Mirror is detected at
the full size position.
The surface temperature of the Upper Fusing Roller reaches 175°C.
ON
Main Drive Motor M1 and Original Glass Cooling Fan Motor
M5 start predrive.
ON
Ventilation Fan Motor M3
ON
*1 M4 turns at full speed.
ON
Developing Bias / Paper Separator Corona
ON
Approx. 100 msec. Image Erase Lamp LA2
ON
Approx. PC Drum Charge Corona /
200 msec. Image Transfer Corona
To ➀ on next page ON
Main Erase Lamp LA3

M-5
 ➀
* 30 sec. if the Upper Fusing Roller
After the lapse of 30 sec.
surface temperature is less than 165°C
or 15 sec.
when S1 is turned ON and 15 sec. if the
surface temperature is 165°C or higher.
OFF
Approx. 5 msec. PC Drum Charge Corona / Image
Transfer Corona
OFF
Approx. 160 msec. LA2

OFF
*2 Approx. 285 msec. M1 / M5
OFF
LA3
OFF
Approx. 150 msec. Developing Bias /
Paper Separator
Corona
Approx. 5 sec. M4 turns at half speed.
M3

The Start Key is pressed.

C
(A4 crosswise paper fed from 1st Drawer, full size, single copy cycle)

The components are energized in order of *1 on the preceding page.

ON
Approx. 0 msec. *3 Exposure Lamp LA1
ON *3:Varies for different
Paper Transport Clutch CL1
ON drawers.
1st Drawer Paper Take-Up Motor M11
1st Drawer Vertical Transport Sensor PC63 is blocked ( L ).
OFF
Approx. 5 msec. M11

Paper Leading Edge Detecting Sensor PC55 is blocked ( L ).

OFF
Approx. 45 msec. CL1

D PWB-A outputs a LOW SCAN signal to SCP Board PWB-J.

The Scanner initiates a scan motion.

A LOW Image Leading Edge signal is input to PWB-A.
ON
LA2
OFF
Approx. 140 msec. LA2 ... Leading edge erase

M-6
E PWB-J outputs a LOW TRON signal to PWB-A.

ON
CL1
ON
Synchronizing Roller Clutch CL2
ON
Approx. 190 msec. Separator Solenoid SL1
OFF
Approx. 150 msec. SL1

F PWB-J outputs a LOW SCEND signal to PWB-A.

Approx. 200 msec.

SCAN signal: H ... The Scanner stops and starts a return motion.
OFF
Approx. 220 msec. LA1

The trailing edge of the paper moves past Transport Roller Sensor PC54
G
(unblocked: H ).

OFF
Approx. 5 msec. CL1

The trailing edge of the paper moves past Paper Leading Edge Detecting
H
Sensor PC55 (unblocked: H ).

OFF
Approx. 210 msec. CL2

I The trailing edge of the paper moves past Paper Exit Switch S53 (ON: H ).

The components are deenergized in order of *2 on the preceding

page.

M-7
 5 WATCHDOG (CPU OVERRUN MONITOR) FUNCTION
5-1. Overview
The watchdog function monitors whether any of the CPUs mounted in the
copier overrun. If this function detects that a CPU overruns, the copier
automatically resets the CPU, thereby restarting the logic circuit and
mechanism.
Even if a copier CPU operates erratically due to electrical noise, therefore,
the copier is able to recover from the faulty condition so that the number of
visits made by the Technical Representative for CPU overrun can be
minimized.

5-2. Configuration
The copier has three printed-circuit boards each on which a CPU is mounted:
* SCP (Scanner Control Processor) Board PWB-J that controls the optical
system;
* MSC (Macro System Controller) Board PWB-B that controls the control
panel and system; and,
* Master Board PWB-A which controls the copier, Paper Feed Cabinet,
Large Capacity Cassette, and Duplex Unit.
In addition to these, each of the control boards for the Data Controller,
Duplexing Document Feeder, and Sorter/Staple Sorter is equipped with a
CPU.
The watchdog functions are summarized as follows:
* Each of the copier CPUs monitors whether or not it overruns.
* The PWB-B monitors the communications conditions of the CPUs in the
Duplexing Document Feeder and Data Controller.
* The PWB-A monitors the communications conditions of the CPUs in the
Sorter and Staple Sorter.
* The control boards for the Paper Feed Cabinet and Duplex Unit do not
have a CPU in them. Instead, the PWB-A in the copier controls their
operations.

Duplexing
Data Controller Document Feeder
Control Board Control Board (PWB-A)

Copier

SCP Board PWB-J

Sorter, Staple Sorter
MSC Board PWB-B

Control Board (PWB-A)

Master Board PWB-A

= Board on which a Paper Feed Cabinet, Large

CPU is mounted Capacity Cassette, Duplex Unit

M-8
5-3. Watchdog Function Post-Processing
The following processing is performed if a faulty condition is detected in the
CPU. The Watchdog Counter available from the Tech. Rep. mode allows the
Technical Representative to check if any faulty condition has occurred in the
CPU. For details, see SWITCHES ON PWBs.

Processing
Faulty CPU Processing (in Standby)
(during Copy Cycle)
Copier 1 : The CPU is automatically reset (i.e., 1: Same as 1 on the left.
shutting down power to all CPUs 2: Since the paper is left
including those in the options) as inside the copier, the
soon as a faulty CPU is detected. copier detects a misfed
sheet of paper or two
when power is turned
ON again. If the MSC
CPU is faulty, however,
all paper in line for the
exit will be ejected and
all paper headed to the
duplex will be stored,
before restarting the
CPU.

Sorter, 1 : When the CPU malfunctions, the 1 : Same as 1, 2, and 3 on

Staple Sorter communication to Master Board the left.
PWB-A of the copier is cut off or 2 : The paper take-up
faulty data is transmitted to the sequence is stopped.
PWB-A.
3 : All sheets of paper
2 : The PWB-A detects that the CPU of being fed through the
the Sorter or Staple Sorter is faulty. copier are fed out of
3 : The PWB-A notifies MSC Board the copier.
PWB-B that the CPU of the Sorter or 4 : Same as 4, 5, and 6 on
Staple Sorter is faulty. the left.
4 : As commanded by the PWB-B,
Option Relays RY3C and 4C are
turned OFF and ON to restart the
option.
5 : The communication line from the
CPU of the Sorter or Staple Sorter to
PWB-A is recovered.
6 : PWB-A notifies PWB-B that the CPU
of the Sorter or Staple Sorter has
recovered from the faulty condition.

M-9
 Processing
Faulty CPU Processing (in Standby)
(during Copy Cycle)
Other than 1 : When the CPU malfunctions, the 1 : Same as 1 and 2 on
above communication to MSC Board the left.
PWB-B of the copier is cut off or 2 : The paper take-up
faulty data is transmitted to the sequence is stopped.
PWB-B.
3 : All sheets of paper
2 : PWB-B detects that the CPU being fed through the
malfunctions. copier are fed out of
3 : As commanded by the PWB-B, the copier.
Option Relays RY3C and 4C are 4 : Same as 3, 4, and 5 on
turned OFF and ON to restart the the left.
option.
4 : The communication line from the
CPU to PWB-B is recovered.
5 : PWB-B detects that the CPU has
recovered from the faulty condition.

M-10
6 MALFUNCTION BYPASS FUNCTION
6-1. Overview of the Malfunction Bypass Function
• When a malfunction occurs in the copier, the malfunction bypass
function permits the copier to continue operating if that malfunction is
one of the predefined candidates for an isolated malfunction and if it will
not affect the current copying operation. But, if an isolated malfunction
occurs anytime during the actual copy cycle, the copier considers it a
normal malfunction.
• If a copying function involving the isolated malfunction is selected, the
message "Selected mode can’t be used." appears on the Touch Panel
and the copier rejects that function.
• When an isolated malfunction occurs, a tiny square " " indicator
appears in the lower left corner of the Basic Screen. Access the
"Machine Status" display via the Tech. Rep. mode to ascertain the
trouble code. Then refer to the Troubleshooting Manual for details.
• Trouble codes for up to five isolated malfunctions are shown on the
"Machine Status" display. When a sixth isolated malfunction occurs, the
copier considers it a normal malfunction, prompting a Tech. Rep. call.
(The sixth malfunction is shown on the Touch Panel.) But, if all of the
paper feed ports (except the manual feed port) show an isolated
malfunction, the copier considers them a normal malfunction even
though the isolated malfunction count may be less than five.
6-2. Candidates for Isolated Malfunctions
● Copier-Related
Item Malfunction Code
1 1st Drawer C0920/C0924/C0350/C0370 ∗ 1. C0921∼23/C0926
2 2nd Drawer C0910/C0914/C0350/C0370 ∗ 2. C0911∼13/C0916
3 Auto Paper, Auto Size C0F02/C0FE1∼C0FFF
4 ATDC C0F30
5 AIDC C0F20∼23
6 Corona Wire take-up C0100

∗1, ∗2: For Inch Areas only

● Cabinet/Duplex/Sorter-Related

∗3 7 3rd Drawer (PF-202) C0900/C0904/C0351/C0352

∗4 8 4th Drawer (PF-202) C0950/C0954/C0351/C0352
Large Capacity
9 C09C0/C09C2/C0350/C0354/C0370/C0374
Cassette (C-301)
Paper Feed Cabinet
10 C0990∼96/C0998∼9C/C0F79/C0351/C0352
(PF-102)
11 Duplex Unit (AD-5) C0d00/C0d20/C0d50/C0353
Sorting (S-205,
12 1134M071AA
ST-206/101)
∗5 13 Stapling (ST-206/101) 1134M072AA

14 Punching (ST-206) 1134M073AA

∗3, ∗4: For Metric Areas only

∗3, ∗5: For details, see "ADDITIONAL INFORMATION FOR
ST-206/S-205/ST-101 MOUNTED ON EP3050/EP4050."
M-11
 7 IMAGE STABILIZATION SYSTEM
7-1. Overview of the Image Stabilization System

◆ The following image stabilization controls are provided to ensure

stabilized copy image.

Quality Purpose Control

Initial Image density, To make an initial • After making the variation
Setting gradation adjustment of grid adjustment and contamination
voltage (VG) and correction for the AIDC Sensor,
optimum Exposure the copier produces a
Lamp voltage solid-black and halftone pattern
using the FF or F5 and, through AIDC Sensor
operation. control, sets the initial values for
the grid voltage and optimum
Exposure Lamp voltage.
Regular Image density To compensate for • After making the AIDC Sensor
Correction any drop in image contamination correction, the
density due to a copier produces a solid-black
deteriorating PC pattern and, through AIDC
Drum. Sensor control, corrects the grid
voltage.
Gradation To compensate for • After making the AIDC Sensor
any drop in the contamination correction, the
intensity of LA1 copier produces a halftone
light due to a pattern and, through AIDC
contaminated Sensor control, corrects the
optical system. optimum Exposure Lamp
voltage.
Foggy To keep a given • The copier provides toner
background toner-to-carrier replenishing control through
ratio of the ATDC Sensor control. (∗1)
developer in the
Developer Mixing
Chamber.
One-Shot Image density, To compensate for • After making the AIDC Sensor
Correction gradation any drop in surface contamination correction, the
(When the potential of the PC copier produces a solid-black
Power Drum upon and halftone pattern and,
Switch is power-up in the through AIDC Sensor control,
turned ON) morning. corrects the grid voltage and
optimum Exposure Lamp
voltage.

M-12
 Quality Purpose Control
Correction Image density, To compensate for • The copier corrects the grid
for Faulty gradation image density and voltage and optimum Exposure
AIDC gradation aggra- Lamp voltage according to the
Sensor vated by a faulty time through which the PC
AIDC Sensor. Drum has turned and the copier
has run.
Correction Foggy To correct foggy • The copier provides toner
for Faulty background background replenishing control through
AIDC caused by a faulty ATDC Sensor control. ( ∗2)
Sensor AIDC Sensor.

∗1, 2: See p.M-69 and onward of "13. DEVELOPING UNIT."

◆ The following is the block diagram of the image stabilization system.

Exposure Original Width Scale

Lamp LA1 Original Glass

Halftone Patch
PU2

EE
(PWB-H)

PWB-A

Toner CPU
Image Erase Replenishing
Lamp LA2 HV1

(UN3) (UN4)
ATDC

AIDC

M-13
7-2. AIDC Sensor
To provide image stabilization control, this copier has AIDC Sensor UN3
fitted to the Cleaning Unit of the PC Unit. The sensor is used to detect the
toner density and background level on the PC Drum.

Operation
1: The UN3’s LED projects approx. 940-nm infrared light onto the surface of
the PC Drum.
2: The UN3’s phototransistor detects the amount of light reflected back.
3: The phototransistor outputs a voltage corresponding to the intensity of the
light reflected back.

LED Power
Output GND
Supply

Surface of PC Drum

Toner Density Light reflected Output

High Small High
Low Large Low

M-14
7-3. AIDC Sensor Control
• There are five processes performed as the AIDC Sensor control:

Optimum Exposure Lamp voltage

AIDC Sensor variation adjustment
correction (Exposure correction)
AIDC Sensor contamination correction AE Sensor gain adjustment
Grid voltage (VG) correction

◆ Control of Each Process

[1] AIDC Sensor Variation Adjustment

This adjustment is made since the regular current control cannot cover
part-to-part variations in the AIDC Sensor (installation, circuit,
deterioration, etc.).
[Control]
• The AIDC Sensor LED is turned ON to illuminate the erased surface on the
PC Drum.

• The 4-bit analog switch selects the load resistance.

• The output voltage from the AIDC Sensor goes through the load resistance
selected in the above step and the resultant voltage is applied to Master
Board PWB-A.

• The load resistance is switched so that the above voltage becomes 1 V or

less, at which time, the analog switch setting is fixed.

M-15
[2] AIDC Sensor Contamination Correction

If the Sensor is dirty with toner, it results in an error being produced in the
AIDC Sensor output value. The intensity of the AIDC Sensor LED light is
therefore varied.
[Control]
• The AIDC Sensor LED is turned ON to illuminate the erased surface on the
PC Drum.

• The output voltage from the AIDC Sensor is applied to Master Board
PWB-A.

• The current that flows through the AIDC Sensor LED is varied so that the
above output voltage becomes 1V. When 1V is obtained, the LED pulse
signal is fixed.

1136C01M

M-16
[3] Grid Voltage (VG) Correction

The following five different types of controls are provided for VG correction.
The copier checks the toner-to-carrier ratio (T/C) before the controls (1),
(2), (3) and (4).
If the detected T/C is within level ∗1, controls (1), (2), (3) and (4) will not
run.

∗1: Min. (Tech. Rep. mode setting for ATDC) − 2%

Max. 7%

(1) The grid voltage is adjusted at the initial setup or when the PC Drum has
been replaced.
[Control]
• Master Board PWB-A outputs a pulse signal to obtain a grid voltage of
670 V when the first F5 or FF test operation is run after the Drum
Counter has been cleared.
• With Exposure Lamp LA1 turned OFF, Image Erase Lamp LA2 is kept
OFF for a given period of time to produce a solid-black pattern.
• The AIDC Sensor output voltage is applied to PWB-A.
• The grid voltage is varied so that the above voltage becomes 4.1 V or
more, thereby setting the pulse signal for VG.
(2) The correction is made to compensate for any drop in the surface
potential of a deteriorating PC Drum.
[Control]
• Whenever the cumulative time over which the PC Drum has turned
exceeds the level equivalent to 400 copies, PWB-A outputs a pulse
signal for the voltage corrected last at the end of the last copy cycle for
the above event.
• With LA1 turned OFF, LA2 is kept OFF for a given period of time to
produce a solid-black pattern.
• The AIDC Sensor output voltage is applied to PWB-A.
• The grid voltage is varied so that the above voltage falls within the
range between 4.1 V and 4.2 V, thereby setting the pulse signal for VG .
(3) The correction is made to compensate for any drop in the surface
potential of a cold PC Drum immediately after the copier is turned ON in
the morning.
[Control]
• During predrive after the Power Switch has been turned ON, PWB-A
outputs a pulse signal for the voltage corrected last.
• With LA1 turned OFF, LA2 is kept OFF for a given period of time to
produce a solid-black pattern.
• The AIDC Sensor output voltage is applied to PWB-A.
• The grid voltage is varied so that the above voltage becomes 4.1 V or
more, thereby setting the pulse signal for VG.

M-17
(4) The one-shot correction is canceled as the inside temperature of the
copier rises.
[Control]
• Upon completion of the copy cycle for every 100 copies made after the
Power Switch has been turned ON, PWB-A outputs a pulse signal for
the corrected voltage before one-shot correction.

• With LA1 turned OFF, LA2 is kept OFF for a given period of time to
produce a solid-black pattern.

• The AIDC Sensor output voltage is applied to PWB-A.

• These operations are repeated at every 100 copies made until the
above voltage becomes 4.1 V or more. If, however, 600 or more copies
are made or a standby period of 120 minutes or more elapses after the
Power Switch has been turned ON, the one-shot correction is canceled.

(5) A correction is made by increasing the grid voltage by 30 V each time the
cumulative time over which the PC Drum has turned exceeds 1,500
minutes if the copier has previously determined that the AIDC Sensor is
faulty.

1136C02M

M-18
[4] Optimum Exposure Lamp Voltage Correction (Exposure Correction)

The following five different types of controls are provided for the optimum
Exposure Lamp voltage correction. The copier checks the T/C before the
controls (1), (2), (3) and (4). If the detected T/C is within level ∗1, controls
(1), (2), (3) and (4) will not run.

∗1: Min. (Tech. Rep. mode setting for ATDC) − 2%

Max. 7%

(1) The optimum Exposure Lamp voltage is adjusted at the initial setup or
when the PC Drum has been replaced.
[Control]
• PWB-A outputs a pulse signal to obtain an optimum Exposure Lamp
voltage of 60 V when the first F5 or FF test operation is run after the
Drum Counter has been cleared.

• LA1 is turned ON to illuminate the halftone patch on the back of the

Original Width Scale and LA2 is kept OFF for a given period of time to
produce a halftone pattern.

• The AIDC Sensor output voltage is applied to PWB-A.

• The Exposure Lamp voltage is varied according to the difference

between the above voltage and the target median. (This is done by
changing the pulse signal for the Exposure Lamp voltage.)

(2) The correction is made when the F5 test operation is run after the
Exposure Lamp has been cleaned or the SCH-70 (Exposure Lamp
voltage adjustment) setting changed.
[Control]
• When the second or subsequent F5 test operation is run, PWB-A
outputs a pulse signal for the Exposure Lamp voltage set at the last
exposure correction.

• LA1 is turned ON to illuminate the halftone patch on the back of the

Original Width Scale and LA2 is kept OFF for a given period of time to
produce a halftone pattern.

• The AIDC Sensor output voltage is applied to PWB-A.

• The Exposure Lamp voltage is varied according to the difference

between the above voltage and the target median. (This is done by
changing the pulse signal for the Exposure Lamp voltage.)

M-19
(3) The correction is made to compensate for any drop in the reduced
intensity of LA1 light occurring due to a contaminated optical system.
[Control]
• Whenever the cumulative time over which the copier has run exceeds
the level equivalent to 5 K copies, PWB-A outputs a pulse signal for the
Exposure Lamp voltage corrected last at the end of the last copy cycle
for the above event.

• LA1 is turned ON to illuminate the halftone patch on the back of the

Original Width Scale and LA2 is kept OFF for a given period of time to
produce a halftone pattern.

• The AIDC Sensor output voltage is applied to PWB-A.

• The Exposure Lamp voltage is varied so that the above voltage will fall
within the target range. (This is done by changing the pulse signal for
the Exposure Lamp voltage.)

(4) A correction is made for the intensity of LA1 light equivalent to the
changes made in VG by one-shot correction.
[Control]
• After VG has been corrected in one-shot correction, PWB-A outputs a
pulse signal for the Exposure Lamp voltage set at the last exposure
correction.

• LA1 is turned ON to illuminate the halftone patch on the back of the

Original Width Scale and LA2 is kept OFF for a given period of time to
produce a halftone pattern.

• The AIDC Sensor output voltage is applied to PWB-A.

• The Exposure Lamp voltage is varied so that the above voltage will fall
within the target range. (This is done by changing the pulse signal for
the Exposure Lamp voltage.)

M-20
(5) When the copier has found that the AIDC Sensor is faulty, the intensity of
LA1 light is increased by 1V each time the time over which the copier has
run exceeds 700 minutes. The intensity of LA1 light is also varied in
proportion to the changes made in grid voltage varied according to the
cumulative time over which the PC Drum has turned.

1136C03M

M-21
[5] AE Sensor Gain Adjustment

The following two different types of controls are provided for the AE
Sensor gain adjustment.

(1) The AE Sensor gain is adjusted when the F5 or FF test operation is run.
[Control]
• When the F5 or FF test operation is run, the Exposure Lamp is turned
ON to illuminate a blank sheet of paper placed on the Original Glass
with an optimum Exposure Lamp voltage.

• The AE Sensor output voltage is applied to PWB-A.

• The AE Sensor gain is varied so that the above voltage becomes 1.8 V
±0.05, thereby setting the pulse signal for the gain.

• The Exposure Lamp is turned ON to illuminate the halftone patch on the

back of the Original Width Scale with the optimum Exposure Lamp
voltage.

• The AE Sensor output voltage is applied to PWB-A and stored in

memory.

(2) The AE Sensor gain is corrected as necessary according to the Exposure

Lamp voltage changed as a result of "exposure correction."
[Control]
• After the "exposure correction" has been made, the Exposure Lamp is
turned ON to illuminate the halftone patch on the back of the Original
Width Scale with the optimum Exposure Lamp voltage.

• The AE Sensor output voltage is applied to PWB-A.

• The AE Sensor gain is adjusted so that the above voltage becomes the
voltage value stored in memory when F5 was run.

M-22
◆ Control Processing Timing
➀: AIDC Sensor variation adjustment
➁: AIDC Sensor contamination correction
➂: VG correction
➃: Exposure correction O: Performed
➄: AE Sensor gain adjustment −: Not performed

Processing
Condition Timing ➀ ➁ ➂ ➃ ➄
At the initial setup, or
when the first F5 or
FF test operation is
O O O O O
run after the PC
Drum has been
replaced.
The second or
Initial subsequent F5 test
setting operation is run
when the manual
Exposure Lamp
voltage adjustment O O − O O
setting (available
from Tech. Rep.
Choice) is changed
or the Exposure
Lamp cleaned.
The cumulative time If the
If further
over which the PC If VG has exposure
correction
Drum has turned been level has
is O O
reaches a level varied by been
necessary
equivalent to 400
after ➁
➂ varied by
Regular copies. ➃
correction The cumulative time If the
If further
over which the exposure
correction
copier has run level has
is O − O
reaches a level been
necessary
equivalent to 5 K varied by
after ➁
copies. ➃
If the
If further
During predrive after If VG has exposure
correction
the Power Switch been level has
is O O
One-Shot has been turned ON varied by been
necessary
Correction (one-shot correction).
after ➁
➂ varied by
(When the ➃
Power The copier has made
Switch is If further
100 copies after the
turned ON) correction
Power Switch has
is O O − -
been turned ON
necessary
(one-shot correction
after ➁
canceled).

M-23
 O: Performed
−: Not performed

Processing
Condition Timing ➀ ➁ ➂ ➃ ➄
The grid voltage is
increased by 30 V
each time the
− −
cumulative time over − − O
which the PC Drum
∗1 ∗2
has turned reaches
When the 1,500 minutes.
AIDC
Sensor is The optimum
faulty Exposure Lamp
voltage is increased
by 1 V each time the −
− − − O
cumulative time over ∗3
which the copier has
run reaches 700
minutes.

∗1: VG is corrected, not by the AIDC Sensor, but according to the time over
which the PC Drum has turned.
∗2: If VG has been corrected by ∗1, the corresponding exposure level is also
changed.
∗3: The optimum Exposure Lamp voltage is corrected, not by the AIDC
Sensor, but according to the time over which the copier has run.

M-24
 8 PC DRUM
8-1. PC Drum
* The photoconductive drum used in this copier is the organic
photoconductor (OPC) type.
* The drum is made up of two distinct, semiconductive materials on an
aluminum alloy base. The outer of the two layers is called the Charge
Transport Layer (CTL), while the inner layer is called the Charge
Generating Layer (CGL).
* The PC Drum measures φ80 mm × 350 mm.

Handling Precautions
• This photoconductor exhibits greatest light fatigue after being exposed to
light over an extended period of time. It must therefore be protected from
light by a clean, soft cloth whenever the PC Unit has been removed from
the copier.
• Further, use utmost care when handling the PC Drum to prevent it from
being contaminated.
PC Drum
PC Drum Cross-Sectional View
CTL
CGL
Aluminum
Cylinder

8-2. Drive and Grounding for the PC Drum

* When the PC Unit is slid into the copier, the Coupling Gear, driven by a
timing belt and gear from Main Drive Motor M1, is engaged with the flange
of the PC Drum. This connects the drive train for the PC Drum.
* The PC Drum is grounded to the frame of the copier through the Ground
Point inside the rear of the PC Drum and the Drum Holding Shaft. When
the PC Unit is slid into the copier, the Drum Holding Shaft contacts the
Ground Point inside the PC Drum. This provides for assured grounding of
the PC Drum. Conductive grease has been applied to the Ground Point.

Drum Holding Shaft

Conductive
Grease

Ground Point

Ground Plate Coupling Gear

Drive Gear

M-25
8-3. Drum Dry Heater
• Drum Dehumidifying Heater H3 is located under the Lower Synchronizing
Roller. It is a panel heater that prevents condensation from forming on the
surface of the PC Drum.

• H3 operates when:
* The power cord is plugged into the wall outlet.
* Power Switch S1 is in the OFF position.
* Drum Dehumidifying Switch S3 is in the ON position.

Lower Synchronizing Roller

Drum Dehumidifying
Heater H3

Drum Dehumidifying
Switch S3

1136C05M

M-26
 9 DRUM CHARGING
9-1. PC Drum Charge Corona
• The PC Drum Charge Corona in this copier is equipped with a Scorotron
Grid which ensures that a DC negative charge is evenly deposited across
the entire surface of the PC Drum.
• The grid voltage applied to the Grid Mesh of the PC Drum Charge Corona
is varied to compensate for any drop in V0 which could occur with age or
under low temperatures in the morning. This ensures stabilized image
quality. (For more details, see "7. IMAGE STABILIZATION SYSTEM.")
• The Constant-Voltage Circuit in High Voltage Unit HV1 maintains the grid
voltage in the range between DC-550V and DC-850V according to the Grid
Control pulse (PWM) output from Master Board PWB-A.
• The corona unit is provided with a mechanism that takes up a given
amount of the corona wire at a given timing to prevent uneven charging
caused by a dirty wire.
HV1
PWB-A
PC Drum
Charge Corona

1136M005AA

Grid Mesh

<How Scorotron Works>

When High Voltage Unit HV1 turns ON, a
IC HV1 corona emission from the Corona Wire
begins.
Vc
A grid voltage according to the Grid Control
pulse is being applied to the Grid Mesh.
Constant-
Voltage Since there is a potential difference
PC Circuit between the Grid Mesh and PC Drum, the
negative charges of the corona emission
flow through the Grid Mesh to the surface
IC HV1 of the PC Drum. This results in the surface
being negatively charged.
Vc
When the potential of the Grid Mesh
becomes equal to that of the PC Drum (i.e.,
when the potential of the PC Drum
Constant- becomes the grid voltage set by the Grid
Voltage Control pulse), the negative corona current
PC Circuit
flows from the Grid Mesh through HV1 to
the ground.

M-27
9-2. Control of the PC Drum Charge Corona
• The PC Drum Charge Corona is turned ON and OFF by the Drum
Charge/Image Transfer Corona ON signal output from pin 83 (BPA5) of
IC4A. The Grid Control pulse signal is output after the Power Switch has
been turned ON.

<Operation>
The Image Erase Lamp LA2 MODE signal is output.
Approx. 200 msec. later
Master Board PWB-A
The LOW Drum Charge/Image Transfer Corona ON signal is output from
pin 83 (BPA5) of IC4A.

The Drum Charge/Image Transfer Corona output from High Voltage Unit
HV1 is turned ON.

Paper Exit Switch S53 is actuated (when the trailing edge of the paper
moves past S53).
Approx. 5 msec. later
Master Board PWB-A
The HIGH Drum Charge/Image Transfer Corona ON signal is output from
pin 83 (BPA5) of IC4A.

The Drum Charge/Image Transfer Corona output from HV1 is turned OFF.

Image Erase Lamp

H
(LA2)
L

Paper Exit Switch ON

(S53) OFF Approx. 200msec. Approx.
5msec.
PC Drum Charge/Image
ON
Transfer Coronas
OFF
1134T253MCA

M-28
 1136C06M

9-3. PC Drum Charge Corona Wire Take-Up Mechanism/Control

(1) Corona Wire Take-Up Mechanism
• The PC Drum Charge Corona Wire is 3,900 mm long. One end of the wire
is fixed and wound around the Supply Bobbin, while the other end fitted to
the Take-Up Bobbin. The wire is taken up by the Take-Up Bobbin as
Charge Corona Wire Spool Motor M10 turns.
• To give tension and apply brake to the corona wire, the Supply Bobbin is
provided with a friction plate and a spring.
• The speed of the Supply Bobbin is detected as follows. The shaft of the
Supply Bobbin is provided with a rotation detecting cam and lever which
activate and deactivate Charge Corona Wire Spool Sensor PC32.

Rotation
Spring Detecting
Lever Charge Corona
Supply Bobbin Wire Spool
Sensor PC32
Friction Plate
Take-Up Bobbin

Rotation
Detecting Cam

Charge Corona Wire

Spool Motor M10

M-29
(2) Corona Wire Take-Up Control
Charge Corona Wire Spool Motor M10 is energized and deenergized by the
signal output from pin 72 (APC7) of IC4A on Master Board PWB-A. The time
during which M10 is kept energized is controlled by counting the number of
pulses fed by Charge Corona Wire Spool Sensor PC32.

<Take-Up Timings>
The corona wire is taken up at the following three timings.

A: Regular take-up
• When the Wire Take-Up Cycle Counter (an internal counter) reaches
20K, M10 is energized for 16 pulses, which results in the wire being
taken up a length of about 335 mm.
• The precise timing is 10 min. (during which period no copy cycle is run)
after drive has been stopped following the completion of the copy cycle
in which the Counter counted 20K.

B: One-shot take-up
• When the function "Advance Charge Wire" of "System Input" available
from the Tech. Rep. mode menu is invoked, M10 is energized for 5
pulses, which results in the wire being taken up a length of about 104
mm.

C: Initial take-up
• When "Charge Wire" of the "Port/Option" counters available from the
Tech. Rep. mode menu is cleared after the corona wire has been
replaced, M10 is energized for 1 pulse, which results in the wire being
taken up a length of about 21 mm.

<Protection Against a Wire-Empty Condition>

• Since the corona wire take-up mechanism is not provided with a system
to detect a wire-empty condition, the "Charge Wire" counter of the
"Port/Option" counters must be checked to determine when to replace
the corona wire. To give protection against a wire-empty condition, M10
is disabled when the cumulative number of M10 pulses reaches 150.
• The value given for the "Charge Wire" counter is obtained by converting
the number of wire take-up pulses into the corresponding number of
copies. The wire needs replacement when the counter reads a number
ranging from 161 to 185.
• The wire take-up sequence can occur 8 times, which is equivalent to a
counter count of 161K (129 cumulative pulses) and 180K copies (with no
one-shot take-ups being made).

M-30
<Operation>

Take-Up A Take-Up B Take-Up C

<Master Board PWB-A>

A LOW Take-Up signal is output from pin 72 (APC7) of IC4A.

Charge Corona Wire Spool Motor M10 turns.

<Master Board PWB-A>

LOW and HIGH Take-Up Signals are output from pin 58 (APB2) of IC4A.

Counting 16 pulses Counting 5 pulses Counting 1 pulse

<Master Board PWB-A>

A HIGH Take-Up signal is output from pin 72 (APC7) of IC4A.

M10 stops turning.

∗: The copier CPU keeps track of the cumulative number of pulses. When
the count reaches 150, the Take-Up signal remains HIGH, disabling M10.
Clear this cumulative counter for resetting.

1134C01MAA

M-31
9-4. Ozone Filter
• Ozone produced by the PC Drum Charge Corona is absorbed by the
Ozone Filter located to the left of the PC Drum Charge Corona, as the air is
drawn out of the copier by Ventilation Fan Motor M3.

Ventilation Fan Motor M3 PC Drum Charge

Ozone Filter Corona

M-32
10 OPTICAL SECTION
10-1. Construction
• As the Scanner is moved by Scanner Motor M2, the light from Exposure
Lamp LA1 is reflected off the original and guided through the six Mirrors
onto the surface of the PC Drum to form the electrostatic latent image.

5 7 6
8

2 9

1 4
3

10
12

15 13 11

14

18 16

17

1. Scanner Reference Position 10. 5th Mirror

Sensor PC81 11. 6th Mirror
2. Original Glass Cooling Fan 12. Lens Motor M6
Motor M5 13. AE Sensor Board PWB-H
3. Scanner 14. Exposure Lamp LA1
4. Lens 15. 1st Mirror
5. Scanner Motor M2 16. 2nd Mirror
6. Scanner Shaft 17. 3rd Mirror
7. Mirror Motor M7 18. 2nd/3rd Mirrors Carriage
8. 4th/5th Mirrors Carriage
9. 4th Mirror

M-33
10-2. Exposure

Book 3
2 Original Glass

5
6
1st Mirror

1. Auxiliary Reflector : The Auxiliary Reflector reflects light onto the areas that
Exposure Lamp LA1 cannot illuminate when an original
that does not lie flat on the Original Glass (such as a
book) is being used. It functions to reduce shadows
which would otherwise be transferred to the copy.
2. Intensity Correction : The intensity of the light emitted by LA1 remains flat.
Mirror The intensity is slightly attenuated at the very ends,
which is corrected by the Intensity Correction Mirrors
fitted on the front and rear ends of the Scanner.
3. Aperture Plates : The four Aperture Plates regulate the amount of LA1
light illuminating the original surface.
4. Exposure Lamp
Thermal Fuse TF2 : Exposure Lamp Thermal Fuse TF2 becomes electrically
open (blows) if the temperature in the area surrounding
the Main Reflector exceeds 128°C, thus cutting off the
circuit to LA1.
5. Main Reflector : The Main Reflector ensures that light from LA1 exposes
all areas of the original.
6. Exposure Lamp LA1 : This copier uses a halogen frost lamp for Exposure
Lamp LA1. Its light distribution characteristics keep the
intensity of the light remaining flat.

M-34
10-3. Exposure Lamp Control
• The voltage applied to Exposure Lamp LA1 is controlled by changing the
duty ratio of the pulse width of the Exposure Lamp Control signal (AVR
PWM) output from Master Board PWB-A.
• For possible contamination of the Optical System and to incorporate any
correction made in the grid voltage, the copier automatically varies the
optimum intensity of the Exposure Lamp light and adjusts AE Sensor
gain to ensure stabilized image quality. (See "7. IMAGE
STABILIZATION SYSTEM.")

<To lower the image density,

the Lamp voltage is increased>
t
H t' (t<t')
L
<To raise the image density,
T the Lamp voltage is reduced.>

t' (t>t') 1136T31MCB

Period T - Pulse Width t

Duty Ratio (%) =
Period T

(1) Automatic Exposure Control

<Overview>
• The copier is provided with the Auto Exposure mode in which the
voltage applied to Exposure Lamp LA1 is automatically increased or
decreased as necessary so that copies of consistent quality are
produced regardless of whether, for example, the original has a dark
background or is a pencil line drawing.
• AE Sensor Board PWB-H (beside the Lens) measures the intensity of
the light reflected off the 3rd Mirror, which results in the black/white ratio
of an area of 210 mm (W) × 6 mm (L) of the original being measured. As
the original is being scanned in the Auto Exposure mode, PWB-H
senses the image density of the original (or the intensity of the light
reflected) on a real-time basis.
• In this mode, the copier either increases or decreases the Exposure
Lamp voltage according to the difference between the AE Sensor output
and reference voltage during the period between when the Image
Leading Edge signal (BASE) is output and when LA1 is turned OFF.

3rd Mirror Surface of Original

Original
210mm 6mm 210mm
Scan Direction

Exploded View

A Given Distance

Slit
AE Sensor
3rd Mirror
Board PWB-H This area corresponds to a
AE Sensor Board PWB-H 210-mm-wide band across the original.

M-35
 <Operation>

Master Board PWB-A

A pulse signal is sent from pin 17 (P50/TA1) of IC1A to light up LA1 for the
center manual exposure setting (EXP5). A LOW Exposure Lamp ON signal
is output from pin 49 (APA1) of IC4A.

Power Supply Unit PU2

The pulse signal is input to pin 3 of PJ19 and PU2 sets the Lamp voltage
according to that signal.

LA1 turns ON.

During the copy cycle, a LOW Image Leading Edge signal (BASE) is output
and the automatic exposure control begins.

AE Sensor Board PWB-H

PD1H detects the intensity of the light striking it and PWB-H converts the
light intensity to a corresponding voltage value, outputting it via pin 7 of
IC1H. (The higher the intensity of the light striking PD1H, the lower the
output voltage.)

Master Board PWB-A

The analog voltage from PWB-H is input to pin 1 (AN0) of IC1A.

PWB-A compares the input voltage with the reference voltage and
increases the Lamp voltage if the input voltage is higher than the reference,
and decreases it if the input is lower than the reference. This is
accomplished by varying the duty ratio of the pulse signal output from pin
17 (P50/TA0) of IC1A.

* The reference voltage value varies depending on the "Expo. Level Priority
(Auto Mode)" setting of the User’s Choice. It also depends on the optimum
Exposure Lamp voltage under that setting.

Optimum Exposure
Lamp Voltage 56V or Less 57V to 63V 64V or More
Choice
Lighter 1.45 1.53 1.59
Normal 1.80 1.80 1.80
Darker 2.15 2.07 2.01

(Unit: V)

M-36
(2) Manual Exposure Control
• When either one of the Exposure Control Keys (Lighter and Darker) on the
Touch Panel is touched, it sets the copier into the Manual Exposure mode.
In this mode, the copier permits the user to vary the Lamp voltage (i.e. the
exposure level) in nine different steps.

<Operation>
Touch the Exposure Control Key as necessary.

Master Board PWB-A

The exposure level data is sent from the control panel to IC1A via MSC
Board PWB-B through MINET communications.

The exposure level data is then converted in IC1A to a pulse signal and
output from pin 17 (P50/TA0) of IC1A. A LOW Exposure Lamp ON signal is
output from pin 49 (APA1) of IC4A.

Power Supply Unit PU2

The pulse signal is input to pin 3 of PJ19. According to this signal, PU2
sets the Lamp voltage (which can be varied in nine steps according to the
exposure setting.)

The intensity of the light emitted by Exposure Lamp LA1 becomes greater or
smaller accordingly.

(3) Exposure Lamp LA1 ON/OFF Control

◆ Exposure Lamp ON Timing
• Exposure Lamp LA1 is turned ON T msec. after the PC Drum Charge
Corona and Image Transfer Corona have been turned ON following the
press of the Start Key. The Lamp ON timing varies for each different
paper source.
• During a multi-copy cycle, LA1 is turned ON again approx. 90 msec.
after it has been turned OFF.
◆ Exposure Lamp OFF Timing
• LA1 is turned OFF approx. 220 msec. after the SCEND signal, which is
being input to Master Board PWB-A from SCP Board PWB-J, has gone
from HIGH to LOW.
1st Copy 2nd Copy

ON
PC Drum Charge Corona/
Image Transfer Corona OFF

H
SCEND Signal Tmsec.
L
Approx. 220msec.
ON
Exposure Lamp LA1
OFF

Approx. 90msec.
1134T254MCA

M-37
 1136C07M

M-38
10-4. Intensity Correction
(1) Because of the nature of the Lens, the intensity of the Exposure Lamp
light after passing through the Lens tends to be higher at the center and
lower towards both ends. To solve this problem, there is a Lens Aperture
Cover installed at the back of the Lens. It limits the amount of light at the
center to ensure that an even amount of light strikes the surface of the
PC Drum.

(2) When a zoom ratio is large, it results in the intensity of light striking the
surface of the PC Drum decreasing. To correct the varying intensity of
the light striking the surface of the PC Drum in different zoom ratios, the
Lamp voltage is increased according to the set zoom ratio in the Manual
Exposure mode and a correction is made for the AE Sensor input voltage
to increase the Lamp voltage in the Auto Exposure mode.

Manual Exposure Correction Auto Exposure Correction

Zoom Range Coefficient Coefficient
Lamp Voltage (V) Equivalent Lamp Voltage (V)
0.500~0.549 +2 +2
0.550~0.949 +1 +1
0.950~1.099 ±0 ±0
1.100~1.399 +1 +1
1.400~1.749 +2 +2
1.750~2.000 +4 +4

M-39
10-5. Scanner and 2nd/3rd Mirrors Carriage Moving Mechanism
• The Scanner and the 2nd/3rd Mirrors Carriage are driven by Scanner
Motor M2 through the Scanner Drive Cable, in the rear.
• Both the Scanner and 2nd/3rd Mirrors Carriage slide along the Scanner
Shaft in the rear of the copier. While at the front end, there is a Slide
Collar attached to each of the bodies and that Collar slides over the
Slide Rail. The speed of the Scanner varies with different zoom ratios
(270.0 mm/second in the full size mode).
• Scanner Reference Position Sensor PC81 detects the home position of
the Scanner. It determines the reference position for the scan motion.

Scanner Motor M2 Fly wheel

Scanner Reference
Position Sensor PC81
Scanner Shaft

Scanner
Rear

Collar
2nd/3rd Mirrors
Carriage
Front
10-6. Scanner Motor M2 Control
<Overview>
• A DC servomotor is used for Scanner Motor M2. The pulse width
modulation, or PWM, control is employed in which the average voltage is
controlled by varying the width of the Scanner drive pulse which is the
voltage input to the Motor.
• A photosensor and a pulse disk are built into M2. Their function is to
convert the Motor shaft speed into the corresponding series of pulses.
This pulse signal is input to SCP Board PWB-J.
• PWB-J then calculates the Motor speed using the period of the pulse
signal applied to it and controls the Scanner drive pulse which is to be
applied to the Motor. This effectively stabilizes the Motor speed.
• The pulse signal applied to PWB-J is also used to determine the
distance over which the Scanner should travel. This distance is
represented by the number of pulses corresponding to each paper size
and zoom ratio.
• The flywheel mounted on M2 smooths out the rotation of the motor.

M-40
<Scan/Return Switching and Braking of Scanner Motor M2>
• Scanner Motor M2 is turned forward to move the Scanner in the scan
direction, turned backward to move the Scanner in the return direction,
or braked by the Motor Forward and Motor Backward signals input from
pins 13 and 15 of IC3J on SCP Board PWB-J. Details are as follows.

Motor Forward Signal Motor Backward Signal

(Pin 13 of IC3J) (Pin 15 of IC3J)
Turns Forward H L
Turns Backward L H
Braked (in Scan Motion) L H
Braked (in Return Motion) H L

• The brake control in the return motion is provided as follows, since M2

builds up its speed to the maximum level during the return motion. The
Motor Backward signal is first alternated between HIGH and LOW states
to reduce the input voltage to M2 to a low level. After M2 is decelerated
to a given speed through this operation, the above brake control is
performed.

Braking Deceleration Braking

Motor Forward Signal H
(Pin 13 of IC3J) L

Motor Backward Signal H

(Pin 15 of IC3J) L
Forward Rotation (Scan)
Scanner Motor M2

Backward Rotation (Return)

1134T265MCA

<Scanner Speed Control>

• The speed of M2 is controlled by varying the width of the Scanner drive
pulse which is output from pin 38 of IC2J on SCP Board PWB-J. (This
means that the current flowing through M2 is varied.)

Scanner Drive Pulse (Pin 38 of IC2J) Output Waveform

Period T
High-Speed
Rotation
Pulse Width t 1136T34MCA

Period T
Low-Speed
Rotation
Pulse Width t' 1136T35MCA

M-41
 <Scan/Return Motion>
◆ These are the signals used during the scan and return motion:

• ENABLE signal : Input from the master CPU to SCP. Enables the operation of
each load of the optical system when LOW and disables the
operation of all loads when HIGH.
• SCAN signal : Input from the master CPU to SCP and requests a scan motion
when LOW.
• BASE signal : Input from the SCP to master CPU and indicates the image
leading edge position. Serves also as the reference for setting
the scan length.
• TRON signal : Input from the SCP to master CPU and controls the start of the
Synchronizing Roller when LOW.
• SCEND signal : Input from the SCP to master CPU and gives an advance notice
of the completion of a scan motion when LOW.
• SHOME signal : Input from Scanner Reference Position Sensor PC81 to SCP
and detects the Scanner at the home position when LOW.
Serves also as the reference for a scan motion.

◆ Here is the timing chart for scan and return motions.

Scan Speed

Scanner Motor M2 Scan Return Scan Return

Scanner Reference
Position Sensor PC81
ENABLE Signal

SCAN Signal

BASE Signal

1
TRON Signal

2
3
SCEND Signal

Move Move
Lens/Mirrors Motion Initial Operation 1136T48MCA

∗1 : The LOW BASE signal is output after a given distance is traveled after the
PC81 output has gone HIGH.
∗2 : The LOW TRON signal is output after the lapse of a given period of time plus
correction [A-4 (Lens Position Full Size), A-5 (Lens Position Reduction), and
A-11 (Lens Position Enlargement) of Adjust mode] after the BASE signal has
gone LOW.
∗3 : The LOW SCEND signal is output approx. 200 msec. before the Scanning
finish.

M-42
 1136C08M

M-43
10-7. Lens Drive Mechanism/Control
(1) Lens Drive Mechanism
• The Lens is moved by the Lens Drive Cable to which drive is transmitted
from Lens Motor M6.
• A two-phase stepping motor is used for M6. The Motor is turned forward
or backward by the pulse signals output from SCP Board PWB-J, thus
moving the Lens in either the reduction or enlargement direction.
• When a zoom ratio is selected, pulse signals from PWB-J are input to
the Lens Motor. The Motor’s shaft turns 7.5° per step, which is
equivalent to approx. 0.2 mm of linear Lens movement.
Lens

Lens Reference
Position Sensor PC90

Lens Motor M6

• In this copier, registration for the original is determined at the rear left
corner, while that for the PC Drum is at the front side. For this reason,
there is a Lens Position Correction Cam that moves the Lens slantwise.
• The Lens Moving Plate moves linearly on a shaft, while the Lens Holder
is movable on the Lens Moving Plate.
• The one roll of the Lens Holder is fitted in the groove of the Lens
Position Correction Cam via slits in the Lens Moving Plate. This means
that the Lens Holder moves along a curved trajectory which is drawn by
the Lens Position Correction Cam, though the Lens Moving Plate makes
a linear motion.

Lens

Lens Holder

Roll Shaft

Lens Position
Correction Cam Lens Moving Plate

M-44
(2) Lens Reference Position Detection
• Lens Reference Position Sensor PC90 is used to detect the Lens at the
reference position when the copier is turned ON.
• The Lens should be at the reference position when the Sensor output
goes from LOW (enlargement side) to HIGH (reduction side). The Lens
moves from this position a distance equivalent to the correction [Adjust
Mode A1 (Lens Full Size Position)] to arrive at the full size position.

◆ Operation When Power is Turned ON

• When the Lens is located on the enlargement side (PC90 is LOW)

➀ Lens Motor M6 turns forward to move the Lens in the reduction direction.

➁ M6 stops and starts turning backward when the PC90 output goes from
LOW to HIGH.

➂ After being driven 32 steps (NOTE 1) from when the PC90 output goes
from HIGH to LOW, M6 stops and starts turning forward.

➃ M6 stops turning when the PC90 output goes from LOW to HIGH. (The
Lens is now at the home position.)

➄ The Scanner makes the initial motion.

➅ After the Scanner has completed the initial motion, M6 starts turning
backward to move the Lens in the enlargement direction.

➆ After being driven 100 steps (NOTE 2) from when the PC90 output goes
from HIGH to LOW, M6 stops and starts turning forward.

➇ After being driven 200 steps (NOTE 2), M6 stops and starts turning
backward.

➈ After being driven 32 steps (NOTE 1) from when the PC90 output goes
from HIGH to LOW, M6 stops and starts turning forward.

➉ M6 temporarily stops turning when the PC90 output goes from LOW to
HIGH.

11 M6 starts turning forward again and moves the Lens a distance

equivalent to the correction. It then stops. (The Lens is now at the full
size position.)

• When the Lens is located on the reduction side (PC90 is HIGH)

➀ M6 turns backward to move the Lens in the enlargement direction.

➁ The subsequent operations are the same as those in ➂ to 11 above.

M-45
 Enlargement Direction Home Position Reduction Direction
(PC90 LOW) (PC90) (PC90 HIGH)

Forward Rotation 1

3
4

2 1 Backward Rotation

3
4

5 Scanner Initial Operation

7
6
8

10 11
Full Size
Position 1136T37MCB

NOTES: 1. To enhance Lens positioning accuracy, the Lens is always

brought to the full size position from the enlargement side. This
compensates for the error produced by backlash in the drive
gears and part-to-part variations in the Lens Moving Plate.
2. The operations from ➅ through ➉ are performed to check for
possible binding of the Lens moving mechanism. (These
operations are not performed when the Front Door is closed.)

◆ Operation When Zoom Ratio is Changed

• For a reduction ratio
M6 is driven through the number of steps according to the setting of
Adjust mode A-1 to move the Lens in the reduction direction.

• For an enlargement ratio

M6 is driven through the number of steps according to the setting of
Adjust mode A-1 plus 32, to move the Lens in the enlargement direction.
M6 is then driven another 32 steps to move the Lens in the reduction
direction.

M-46
(3) Lens Motor M6 Control

• Lens Motor M6 has four Coils, each being energized or deenergized in a

given sequence (sequence of pulse signals output from pins 2, 7, 10,
and 15 of IC5J on SCP Board PWB-J) to determine the direction of
rotation.
• When M6 is turned forward (reduction direction), the outputs from pins 2,
7, 10, and 15 are in the order of step 4, step 3, step 2, and step 1.
• When M6 is turned backward (enlargement direction), the outputs from
these pins are in the order of step 1, step 2, step 3, and step 4.

Operation Order
IC5J
Step 1 Step 2 Step 3 Step 4

Pin 2 L L H H

Pin 7 H L L H

Pin 10 H H L L

Pin 15 L H H L

Forward
Rotation Lens Moving in Reduction Direction.
Backward
Rotation
Lens Moving in Enlargement Direction.
1136H48MCA

M-47
 1136C09M

M-48
10-8. 4th/5th Mirrors Carriage Positioning Mechanism/Control
(1) 4th/5th Mirrors Carriage Positioning Mechanism

• To ensure that a focused image of the original is reproduced on the

surface of the PC Drum when in an enlargement or reduction mode, the
distance between the original and the surface of the PC Drum
(conjugation distance) must be greater than that when in the full size
mode. To accomplish this, the 4th/5th Mirrors Carriage is moved in the
direction of a greater conjugation distance (+ direction).
• The 4th/5th Mirrors Carriage is moved by the rack gear fitted to the
4th/5th Mirrors Guide Plate, which is in mesh with the pinion gear. Mirror
Motor M7 gives drive to this pinion gear.
• M7 is a two-phase stepping motor. The Motor is turned forward or
backward by the pulse signals output from SCP Board PWB-J, thus
moving the Carriage in the required direction.
• When a zoom ratio is selected, pulse signals from PWB-J are input to
M7. The Motor’s shaft turns 7.5° per step, which is equivalent to approx.
0.09 mm of linear Mirrors Carriage movement.

Pinion
Gear M7

Rack Gear 4th/5th Mirrors Carriage

Mirror Motor M7

+ Direction
4th/5th Mirrors − Direction
Guide Plate
Mirror Reference Position Sensor PC86

(2) 4th/5th Mirrors Carriage Reference Position Detection

• Mirror Reference Position Sensor PC86 detects the home position of the
4th/5th Mirrors Carriage when the power is turned ON.
• The 4th/5th Mirrors Carriage is at the home position when the PC86
output goes from LOW (− side) to HIGH (+ side). The carriage moves
from this position a distance equivalent to the correction [Adjust mode
A-2 (Mirror Full Size Position)] to arrive at the full size position.

M-49
◆ Operation When Power is Turned ON

• When the 4th/5th Mirrors Carriage is located on the + side (PC86 is HIGH)

➀ After the Lens has been detected at its home position, Mirror Motor M7
turns backward to move the 4th/5th Mirrors Carriage in the − direction.

➁ M7 stops and starts turning forward when the PC86 output goes from
HIGH to LOW.

➂ M7 stops turning when the PC86 output goes from LOW to HIGH. (The
carriage is now at the home position.)

➃ The Scanner makes the initial motion.

➄ After the Lens has been detected at its home position, M7 turns forward
100 steps (NOTE 2) before stopping and then starting to turn backward.

➅ After being driven 3 steps (NOTE 1) from when the PC86 output goes
from HIGH to LOW, M7 stops and starts turning forward.

➆ M7 temporarily stops turning when the PC86 output goes from LOW to
HIGH.

➇ After the Lens has been detected at the full size position, M7 starts
turning forward again and moves the carriage a distance equivalent to
the correction. It then stops. (The carriage is now at the full size position.)

• When the 4th/5th Mirrors Carriage is located on the − side (PC86 is LOW)

➀ After the Lens has been detected at its home position, M7 turns forward
to move the carriage in the + direction.

➁ The subsequent operations are the same as those in ➂ to ➆ above.

M-50
 Direction (PC86 Low) Reference Position Direction (PC86 HIGH)
(PC86)
After Lens Has Been
Detected at Home Position

1 Backward Rotation

2
3

Forward Rotation 1
3

4 Scanner Initial Operation

6
7

After Lens Has Been

Detected at Full Size Position
8
Full Size
Position
1136T38MCB
1136T38MCA

NOTES: 1. To enhance positioning accuracy, the 4th/5th Mirrors Carriage is

always brought to the full size position from the − side. This
compensates for the error produced by backlash in the drive
gears.
2. The operations from ➄ through ➆ are performed to check for
possible binding of the carriage moving mechanism. (These
operations are not performed when the Front Door is closed.)

◆ Operation When Zoom Ratio is Changed

• For the + direction

M7 turns forward the required number of steps before stopping.

• For the − direction

M7 turns backward the required number of steps plus 3, then turns
forward 3 steps before stopping.

M-51
(3) Mirror Motor M7 Control

• Mirror Motor M7 has four Coils, each being energized or deenergized in

a given sequence (sequence of pulse signals output from pins 2, 7, 10,
and 15 of IC6J on SCP Board PWB-J) to determine the direction of
rotation.
• When M7 is turned forward (+ direction), the outputs from pins 2, 7, 10,
and 15 are in the order of step 1, step 2, step 3, and step 4.
• When M7 is turned backward (− direction), the outputs from these pins
are in the order of step 4, step 3, step 2, and step 1.

Operation Order
IC6J
Step 1 Step 2 Step 3 Step 4

Pin 2 L L H H

Pin 7 H L L H

Pin 10 H H L L

Pin 15 L H H L

Forward
Rotation Mirrors Moving in Direction.
Backward
Rotation Mirrors Moving in Direction.
1136H49MCA

NOTE: See "Lens Motor M6 Control" for circuit diagram (p. M-48).

M-52
11 ORIGINAL SIZE DETECTING SYSTEM
11-1. Construction

Original Size Detecting

Board UN2

Original Glass
Cooling Fan
Original Size Detecting
Sensor CD1 PC115 Original Cover
Detecting Sensor PC111
Original Size
Detecting Sensor
Original Cover
CD2 PC119
Detecting Lever

Original Size
Size Reset Detecting Sensor FD3
Switch S108 PC118
Original Size Detecting
Sensor FD2 PC117

Original Size
Detecting Sensor
Control Panel FD1 PC116

M-53
11-2. Original Size Detecting Sensors (PC115 to PC119)

(1) Construction of Each Sensor

• The original size detecting sensors determine the distance between the
sensor and the original, which enables the detection of originals with high
image density (Original density up to 0.6).
• All sensors are fixed to the Optical Base Plate, enhancing measuring
accuracy. A movable sensor had a problem of false detection due to its
position being moved.
• Each sensor has two LEDs and one photo receiver (PSD). Since the CD
(crosswise) sensors (PC115, 119) are installed at a height different from
FD (feeding-direction) sensors (PC116, 117, 118), each type has a
different setting distance as detailed below.
CD sensors: Setting distance 115 mm
FD sensors: Setting distance 60 mm

CD Sensor FD Sensor
PSD PSD
LED1 LED1

LED2 LED2

• Each sensor has a built-in signal processing circuit that outputs 8-bit serial
data to Original Size Detecting Board UN2.

Regulator 4 Vcc

PSD
3 Sensor Drive Signal
Signal
Processing
Circuit
1 Data Output

LED1
5 LED Selector Signal

LED Drive Signal

2 GND
LED2
1136M153CA

M-54
(2) Original Detection Method
• When the photo receiver receives the reflected light of the two LEDs at an
intensity that exceeds a predetermined level, the detection system
determines that an original is placed within the Setting Distance of the
Sensor.

Original
Original Glass

Setting Distance
Light Being
Received

Light Being Emitted

M-55
(3) Sensor Locations
• The number and location of the Original Size Detecting Sensors. Vary
depending on the marketing area as below. O: Standard ●: Optional
Sensors CD1 CD2 FD1 FD2 FD3
Areas (PC115) (PC119) (PC116) (PC117) (PC118)
Metric Areas O ● O O ●
Inch Areas O  ● O ●
(Hong Kong Area) O O O O O

NOTE: If the optional sensors are installed, set Jumper Connector JP2 on
UN2 as illustrated below and run the F7 operation.

FD 1 FD 2 FD3
Letter C Letter L Legal
Length (Inch) 11" × 17"
FLS

Width (Inch)

Width (Metric)

Invoice
A5L
B5L
Legal,
A4L
Letter L
B4L, B5C
Letter C,
A3L, A4C 11" × 17"

CD2 CD 1
B5C A4C, B5L A4L A3L L: Lengthwise;
Length (Metric) B4L
A5L C: Crosswise
Original Size Detecting Board UN2

CN 1 CN 4

CN 3
JP 1

LED 1 LED 2 JP 2 CN 2

FD1 is mounted FD1 is not

mounted
Position of
JP1

CD2 and FD3 CD2 and FD3 are

are mounted not mounted

Position of
JP2

M-56
11-3. Original Size Detection
(1) Size Detection
• Original Size Detecting Board UN2 reads the output data provided by the
original size detecting sensors (PC115 to 119). By comparing the data from
each sensor with the threshold level, it determines whether there is an
original placed on the Original Glass. UN2 then determines the size of the
original according to the combination of the data.

(Metric Area)
FD1 FD2 FD3 CD1 CD2
Original Size Determined
LED2 LED1 LED2 LED1 LED2 LED1 LED2 LED1
Size by UN2
A3L A3L (A3L) O O O O(O) O(●) O O O(O)
B4L B4L (B4L) O O O O(O) O(●) ● O ●(●)
A4L A4L (A4L) O O O ●(●) ●(●) ● ● ●(●)
A5L A5L (A5L) O ● ● ●(●) ●(●) ● ● ●(●)
A4C A4C (A4C) O ● ● ●(●) ●(●) O O O(O)
Letter L:
Letter L (Letter L) O O ● ●(●) ●(●) ● ● ●(●)
8-1/2" × 11"
11" × 17" 11" × 17" (A3L) O O O O(O) O(●) O O ●(O)
Legal:
Legal (A4L) O O O O(●) O(●) ● ● ●(●)
8-1/2" × 14"
FLS:
FLS (A4L) O O O O(●) ●(●) ● ● ●(●)
8-1/2" × 13"
Letter C:
Letter C (A4C) O ● ● ●(●) ●(●) O O ●(O)
11"×8-1/2"
No Original No Original ● ● ● ●(●) ●(●) ● ● ●(●)

(Inch Area)
FD1 FD2 FD3 CD1
Size Determined
Original Size LED2 LED1 LED2 LED1 LED2 LED1 LED2
by UN2
11" × 17" 11" × 17" (11" × 17") O(O) O O O(O) O(O) O O
Legal: 8-1/2" × 14" Legal (Legal) O(O) O O O(O) O(O) ● ●
Letter L: 8-1/2" × 11" Letter L (Letter L) O(O) O ● ●(●) ●(●) ● ●
Letter C: 11"×8-1/2" Letter C (Letter C) O(O) ● ● ●(●) ●(●) O O
FLS: 8-1/2" × 13" FLS (Legal) O(O) O O O(O) ●(O) ● ●
Invoice:
Invoice (No Original) O(●) ● ● ●(●) ●(●) ● ●
5-1/2" × 8-1/2"
No Original No Original ●(●) ● ● ●(●) ●(●) ● ●

* O: Original Present ●: Original Not Present

* If no optional sensors are mounted, data is processed as indicated in ( )
and the original sizes determined by UN2 are as indicated in ( ).
* UN2 does not use the data provided by LED1 of Original Size Detecting
Sensor FD1 (PC116) and LED2 of CD2 (PC119) for the determination of
the original size.
* Any non-standard size is rounded off to the nearest standard size.

M-57
(2) Original Size Detection Processing
• The copier performs different processing for the detection of the original
size under different copier conditions as follows.

Copier Condition Original Size Detection Processing

1 The Original Cover is left LEDs of Original Size Detecting Sensors PC115 to
open. 119 project light onto the original and the photo
receivers of the sensors receive the reflected light to
* Original Cover Angle
transmit the corresponding data to Original Size
Detecting Sensor
Detecting Board UN2.
PC111 remains
deactivated.
UN2 determines the original size based on the
combination of the output data from the original size
detecting sensors.

UN2 divides the original size data into two parts and
transmits 4-bit parallel data to Master Board PWB-A
approx. every 73 msec.

PWB-A combines the 4-bit original size data back into

8-bit data and selects the appropriate paper size
according to the information stored in the memory.

2 The Original Cover is The original size data is latched when PC111 is
lowered to an angle less activated and the original size is set.
than 15°.
* PC111 is activated.
3 The Original Cover is The copier selects the appropriate paper size based
completely lowered. on the set original size data and selects the paper
source loaded with paper of that size, with the paper
* The magnets fitted to
size indicated on the control panel (when in the Auto
the Original Cover
Paper or Size mode).
actuate Size Reset
Switch S108.
If the copier is unable to find the target paper size, it
gives a paper-empty warning message.

4 The Original Cover is The set original size data and selected paper size are
raised to an angle less reset.
than 15°
* S108 is deactuated.
* PC111 remains
activated.
5 The Original Cover is The copier proceeds with the next original size
raised to an angle more detection sequence.
than 15°.
* PC111 is deactivated.
* If the Start Key is pressed with the Original Cover raised (PC111 is
deactivated and S108 deactuated), the copier selects the paper size
according to the information stored in the memory.

M-58
11-4. Original Size Detection Circuit

1136C11M

M-59
12 IMAGE ERASE LAMP
12-1. Image Erase Lamp LA2
Any areas of charge which are not to be developed along the leading,
trailing, front, and rear edges are neutralized by lighting up 40 LEDs of
Image Erase Lamp LA2. This effectively prevents non-image areas from
being dirtied and economizes on toner consumption.

Image Erase Lamp LA2

PC Drum

Non-Image Areas
Neutralized

M-60
12-2. Image Erase Lamp LA2 ON/OFF Control

(1) ON/OFF Control Data Output

Master Board PWB-A outputs 32-bit ON pattern data (DATA) to Image
Erase Lamp LA2 to turn ON and OFF particular LEDs of LA2.
The ON pattern data is divided into four blocks of data (each 8 bits) output
every 5 msec.

Signals sent from PWB-A are as follows:

DATA: Indicates which LED to turn ON or OFF of LA2.
CLK: Synchronizing signal to transmit data serially.
MODE: Latches the LED ON/OFF data sent from PWB-A.
STROBE: Outputs the latched LED ON/OFF data to turn ON the
corresponding LEDs.

(2) Leading Edge Erase

All LA2 LEDs are turned ON and kept ON for a given period of time after
SCP Board PWB-J has generated an Image Leading Edge signal (BASE)
to erase the image along the leading edge.

The erase time varies depending on whether "Leading Edge Erase" of the
Tech. Rep. Choice is set to "Yes" or "No" and on the control panel setting.
See Table below.

"Yes"
"No" Frame Punch Hole
Function (4 mm)
Erase Erase
Normal File Margin Normal File Margin
Erase
Width 10 15 20 10 15 20 10 10 15 20
Setting
Image
Erase 4 14 19 24 0 10 15 20 10 10 15 20
Width
Timer 80 115 135 155 65 100 120 140 100 100 120 140
Unit: Erase width = mm, Timer = msec.

M-61
(3) Edge Erase
The 40 LEDs of LA2 are turned ON and OFF as follows according to the
zoom ratio or paper size to erase unnecessary charges along both the
front and rear edges of the image.

∗ The LEDs are turned ON according to the paper size in the full size mode.
∗ In any zoom ratio other than full size, LEDs are turned ON according to the
paper size or zoom ratio whichever causes more LEDs to light up.
∗ LEDs are turned ON according to the zoom ratio in manual bypass
copying which circumvents paper size detection.

The 40 LEDs are classified into 32 groups as follows and they are turned
ON or OFF by groups for edge erase.

Image Image
Group No. LED No. Group No. LED No.
Width (mm) Width (mm)
0 1 300 16 17 166
1 2 292 17 18 158
2 3 284 18 19 150
3 4 277 19 20 142
4 5 267 20 21 135
5 6 260 21 22 126
6 7 251 22 23 116
7 8 244 23 24 107
8 9 235 24 25 99
9 10 229 25 26 93
10 11 220 26 ∼35
27∼ −
11 12 212 27 36 −
12 13 203 28 37 −
13 14 194 29 38 −
14 15 184 30 39 −
15 16 174 31 40 −

∗ Numbers are assigned to the LEDs so that the front LED is 40, looking at
the copier from the front.
∗ The "image width" refers to the unexposed image area between the LEDs
numbered from 1 to the corresponding opposite ones that are turned ON.

M-62
LA2 LEDs ON/OFF Pattern

Paper LED Group No.

Zoom
Width
Ratio 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 31
(mm)
~99 O O O O O O O O O O O O O O O O O O O O O O O O O O
100~107 O O O O O O O O O O O O O O O O O O O O O O O O O
108~116 O O O O O O O O O O O O O O O O O O O O O O O O
117~126 O O O O O O O O O O O O O O O O O O O O O O O
127~135 O O O O O O O O O O O O O O O O O O O O O O
136~142 O O O O O O O O O O O O O O O O O O O O O
~0.522 143~149 O O O O O O O O O O O O O O O O O O O O
0.523~0.550 150~158 O O O O O O O O O O O O O O O O O O O
0.551~0.576 159~166 O O O O O O O O O O O O O O O O O O
0.577~0.610 167~173 O O O O O O O O O O O O O O O O O
0.611~0.642 174~184 O O O O O O O O O O O O O O O O
0.643~0.672 185~195 O O O O O O O O O O O O O O O
0.673~0.698 196~203 O O O O O O O O O O O O O O
0.699~0.728 204~211 O O O O O O O O O O O O O
0.729~0.758 212~220 O O O O O O O O O O O O
0.759~0.776 221~229 O O O O O O O O O O O
0.777~0.806 230~235 O O O O O O O O O O
0.807~0.830 236~244 O O O O O O O O O
0.831~0.854 245~251 O O O O O O O O
0.855~0.882 252~258 O O O O O O O
0.883~0.914 259~267 O O O O O O
0.915~0.938 268~277 O O O O O
0.939~0.964 278~284 O O O O
0.965~0.990 285~292 O O O
0.991~ 293~298 O O
O = LED that turns ON

LA2 LEDs ON/OFF Pattern (Frame Erase, erase width 10 mm)

Paper LED Group No.

Width
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 30 31
(mm)
~105 O O O O O O O O O O O O O O O O O O O O O O O O O O O O
106~113 O O O O O O O O O O O O O O O O O O O O O O O O O O O
114~121 O O O O O O O O O O O O O O O O O O O O O O O O O O
122~130 O O O O O O O O O O O O O O O O O O O O O O O O O
131~140 O O O O O O O O O O O O O O O O O O O O O O O O
141~149 O O O O O O O O O O O O O O O O O O O O O O O
150~156 O O O O O O O O O O O O O O O O O O O O O O
157~164 O O O O O O O O O O O O O O O O O O O O O
165~172 O O O O O O O O O O O O O O O O O O O O
173~180 O O O O O O O O O O O O O O O O O O O
181~188 O O O O O O O O O O O O O O O O O O
189~198 O O O O O O O O O O O O O O O O O
199~208 O O O O O O O O O O O O O O O O
209~217 O O O O O O O O O O O O O O O
218~225 O O O O O O O O O O O O O O
226~234 O O O O O O O O O O O O O
235~243 O O O O O O O O O O O O
244~249 O O O O O O O O O O O
250~258 O O O O O O O O O O
259~265 O O O O O O O O O
266~272 O O O O O O O O
273~281 O O O O O O O
282~291 O O O O O O
292~298 O O O O O
299~ O O O O
O = LED that turns ON

M-63
(4) Trailing Edge Erase
All LA2 LEDs are turned ON and kept ON for a given period time after the
lapse of a certain time after SCP Board PWB-J has generated a SCEND
signal to erase the image along the trailing edge.

The erase start timing varies depending on whether "Trailing Edge Erase"
of the Tech. Rep. Choice is set to "Yes" or "No" and on the control panel
setting. See Table below.

"Yes"
"No" Frame Punch Hole
Function (4 mm)
Erase Erase
Normal File Margin Normal File Margin
Erase
Width 10 15 20 10 15 20 10 10 15 20
Setting
Image
Erase 4 14 19 24 0 10 15 20 10 10 15 20
Width
Timer 260 225 205 185 275 240 220 200 240 240 220 200
Unit: Erase width = mm, Timer = msec.

(5) Center Erase

All LA2 LEDs are turned ON after the lapse of a certain time after SCP
Board PWB-J has generated an Image Leading Edge signal (BASE) to
erase the image at the center of the paper.

The erase start timing varies for different paper sizes and erase widths as
shown below. The erase time depends on the erase width.

Erase Start Timing

Paper Size A4C A4L A3L A5C B4L B5L B5C 8.5" 11" 17"
Paper Length 210 297 420 149 364 257 182 216 279 432

Erase 10mm 445 605 835 330 730 530 395 455 575 855
Start 15mm 435 595 825 325 720 525 385 445 565 845
Timing
20mm 425 590 815 315 710 515 375 440 555 840
Unit: Paper Length = mm, Erase Start Timing = msec. L: Lengthwise; C: Crosswise

Erase Time
Erase Width Erase Time
10 mm 25 msec.
15 mm 45 msec.
20 mm 65 msec.

M-64
(6) 2-in-1 Erase
When only a single original is placed on the Original Glass in the 2-in-1
mode (using Duplexing Document Feeder), the copier erases the area
where no originals are present.

Different controls are provided depending on whether "Odd" is specified

on the control panel for the number of originals to be used.

If "Odd" is specified, all LEDs are turned ON and kept ON for a given
period of time after SCP Board PWB-J has generated an Image Leading
Edge signal (BASE) to erase the first half page of the last original.

Paper Size A4C A4L A3L A5C B4L B5L B5C 8.5" 11" 17"
Paper Length 210 297 420 149 364 257 182 216 279 432
Erase Time 455 615 845 340 740 540 400 465 580 865
Unit: Paper Length = mm, Timer = msec. L: Lengthwise; C: Crosswise

If "Odd" is not specified, all LEDs are turned ON after the lapse of a given
period of time after PWB-J has generated a BASE signal to erase the last
half page of the first original.

Paper Size A4C A4L A3L A5C B4L B5L B5C 8.5" 11" 17"
Paper Length 210 297 420 149 364 257 182 216 279 432
Timer 465 625 855 350 750 550 410 475 590 875
Unit: Paper Length = mm, Timer = msec. L: Lengthwise; C: Crosswise

M-65
12-3. Image Erase Lamp LA2 Circuit

1136C12M

M-66
13 DEVELOPING UNIT
13-1. Construction and Function
• This copier employs the New Micro-Toning developing system. The
toner fed up to the Sleeve/Magnet Roller is conveyed onto the points of
development (N1, N2) as the Sleeve/Magnet Roller turns, thereby
forming a visible, developed toner image of the original.

2 3 4 5 6
1
7

10

15 14
12 11
13

1. Toner Bottle 9. Sub Hopper Toner Empty

2. Developer Scattering Prevention Detecting Lever
Mylar 10. Sub Hopper Toner Agitating
3. Developer Scattering Prevention Lever
Plate 11. ATDC Sensor UN4
4. Doctor Blade 12. Developer Conveying/Agitating
5. Sub Hopper Toner Supply Roller Screw
6. Toner Bottle Home Position 13. Bucket Roller
Sensor PC35 14. Magnetic Sheet
7. Toner Bottle Home Position 15. Sleeve/Magnet Roller
Detecting Plate
8. Main Hopper Toner Replenishing
Motor M8

M-67
13-2. Developing Unit Drive Mechanism
• Drive is transmitted from the copier to the Developing Unit by Coupling
Gears 1 and 2 when they mesh.
• Coupling Gear 2 is spring-loaded. If the protruding part of Coupling Gear
1 makes contact with that of Coupling Gear 2 when the Developing Unit
is slid into the copier, spring-loaded Coupling Gear 2 is pushed back
toward the rear of the copier allowing the Developing Unit to be slid into
position. When drive is later transmitted to the Developing Unit, Coupling
Gear 2 is pushed to the front by the tension of the spring to mesh
positively with Coupling Gear 1.

Gear G
Gear J Front
Gear I

Gear H Gear D

Gear F Gear E
Coupling Gear 2
Gear C

Coupling Gear 1
Gear B

Gear A Main Drive Motor M1

Rear Timing Belt B

M-68
 <Copier>
Drive from Main Drive Motor M1 is transmitted via Timing Belt B to Gear A
which is turned clockwise.

Drive is transmitted via Gear B to Gear C, causing Coupling Gear 2

mounted on the same shaft as Gear C to turn clockwise.

<Developing Unit>
Coupling Gear 1 turns clockwise.
The Bucket Roller is turned
clockwise.
Gear E is turned clockwise The Sleeve/Magnet Roller is
through Gear D. turned clockwise.

Gear G is turned clockwise The Developer

through Gear F. Conveying/Agitating Screw is
turned clockwise.
Gear J is turned counterclockwise The Sub Hopper Toner
through Gears H and I. Agitating Lever is turned
counterclockwise.

M-69
13-3. Developer Flow
• When drive from Main Drive Motor M1 is transmitted, the Bucket Roller,
Developer Conveying/Agitating Screw, and Sleeve/Magnet Roller start
turning. As a result, the developer and toner flow along a figure-8
shaped path as indicated by the arrows below, thus mixing and agitating
toner and carrier efficiently.

Sleeve/Magnet Roller

∗1 Magnetic Sheet

Developer
Conveying/Agitating
Screw

ATDC Sensor Unit

UN4

Bucket Roller

ATDC Sensor Unit

UN4
Oval Plate

Oval Plate

∗1: The Magnetic Sheet prevents the Bucket Roller from supplying toner
from the Sub Hopper directly onto the Sleeve/Magnet Roller without
mixing it well with the developer.

Toner Supply Roller

Magnetic Sheet
Toner Supplied
Developer

Developer Brush Bucket

Scraped off into Bucket

M-70
From the Sub Hopper, an even amount of toner is supplied in line over
the Bucket Roller by the Sub Hopper Toner Supply Roller.

The toner is then mixed together with the developer inside the Bucket
Roller and conveyed to both ends of the Bucket Roller. From the two
ends, it is fed to the Developer Conveying/Agitating Screw which further
agitates the developer.

The toner-to-carrier ratio of the developer, which has been conveyed to

the center of the Developer Conveying/Agitating Screw, is sensed by
ATDC Sensor UN4.

At the center of the Developer Conveying/Agitating Screw, the developer

is again fed onto the Bucket Roller and directed towards the front and
rear of the Bucket Roller by the Oval Plate, which ensures that the
developer is fed evenly over the Sleeve/Magnet Roller.

Part of the developer which The developer forms bristles on

was not fed to the the Sleeve/Magnet Roller by the
Sleeve/Magnet Roller is fed magnetic poles of different
back again via both ends of magnetic forces and the height
the Bucket Roller to the of the developer brush is
Developer regulated by the Doctor Blade.
Conveying/Agitating Screw. Toner is then pulled off the
carrier and clings to the charged
areas of the PC Drum to form a
visible, developed image of
toner.

The developer not used for

development is carried back to the
Developer Conveying/Agitating
Screw via the Bucket Roller.

M-71
13-4. Magnetic Pole Positioning
• The Magnet Roller is made up of seven magnets asymmetrically packed.
• Here is the function of each of these poles.

Sleeve/Magnet Roller

S2
S3
N1
N4
N2

N3
S1

N4 : The developer fed by the Bucket Roller is attracted onto the

surface of the Sleeve Roller and the developer brush is formed
before being regulated by the Doctor Blade.
S2, S3 : These two poles are provided between the relatively wide gap
between N4 and N1. They hold the developer brush firmly onto the
surface of the Sleeve Roller until it reaches the point of
development.
These poles are like poles, which causes disturbance (∗ ∗1) in the
developer, thus smoothing out the developer. This effectively
prevents blank lines from occurring on the copy.
N1, N2 : These two poles are the principal magnetic poles and their lines of
magnetic flux at the point of development are perpendicular to the
surface of the PC Drum.
As with S2 and S3, these poles are like poles, which causes
disturbance (∗∗1) in the developer, thus smoothing out the
developer. This effectively prevents blank lines from occurring on
the copy.
N2-S1 : A strong magnetic force is provided between these two poles to
ensure that the carrier is firmly held onto the Sleeve Roller.
S1-N3 : The height of the developer brush is held low to ensure that the
developer remaining on the Sleeve Roller is smoothly recycled to
the Developer Mixing Chamber. The area also prevents the
developer from scattering.
N3 : This pole prevents the developer in the Developer Mixing Chamber
from flowing back.
N3-N4 : Since the magnetic force between these two poles is weak, the
developer falls off the surface of the Sleeve Roller down into the
Developer Mixing Chamber.

M-72
(∗1): Flow of developer due to disturbance on the Sleeve Roller
• The developer is moved as follows on the surface of the Sleeve Roller
by disturbance caused by repulsion between lines of like polarity.

• When the developer is conveyed up to the first (S2 or N1) of the two like
poles, it can go in no directions but sideways because of the force of
repulsion between the two like poles (S2 and S3, or N1 and N2).
• There are, on the surface of the Sleeve Roller, areas which are covered
with no or a very little developer. For convenience, let’s call these areas
the low developer-density areas. Now, that part of developer which has
moved sideways flows to these low developer-density areas, thus
covering the surface with a uniform thickness of developer.

Blank Line

Doctor Blade

S2
S3
N1 N4

N2
N3
S1

• That part of developer remaining on the first pole due to repulsion from
the second pole is pushed by the successive waves of developer,
moving to the second pole.
• At this time, the disturbance generated by repulsion between lines of like
polarity therefore causes the developer to cover those areas which were
not smoothed out at the first pole.
• Especially with the points of development, N1 and N2, the entire layer of
the developer is moved from N1 to N2, while being mixed in itself by
disturbance. This makes for high development efficiency.

S3 S2
N1
N4
N2

S1 S2
N3 S3
N4
N1
N2
N3
S1

M-73
13-5. ATDC Sensor Control
◆ ATDC Sensor
• ATDC Sensor UN4 is installed at the center of the Developer
Conveying/Agitating Screw on the underside of the Developer Mixing
Chamber. It detects the varying toner-to-carrier ratio of the developer,
which is circulated through the chamber, as changes in the magnetic
flux density. The magnetic flux density is converted to a corresponding
voltage value which is applied to the analog port of IC1A on Master
Board PWB-A.
• There is a cleaning mylar at the center of the Developer
Conveying/Agitating Screw. It ensures that fresh developer moves over
UN4 at all times, thus ensures detection of accurate toner-to-carrier ratio.
◆ ATDC Sensor Automatic Adjustment
• The sensitivity of the ATDC Sensor is automatically adjusted to starter
with a 6% T/C when the F8 test operation is run after fresh starter is
loaded.

Pin 1 of IC23A outputs an initial voltage when the F8 operation is started.

The output voltage from the ATDC Sensor is applied to

Analog Port AN1 of IC1A.

IC1A checks to see whether the voltage input to it is 2.5 V.

The voltage is 2.5 V. The voltage is NOT 2.5 V.

The output voltage from pin 1 of The output voltage from pin 1
IC23A is fixed as the reference of IC23A is varied.
voltage. The voltage is decreased if
the input voltage is 2.5 V or
more.
The voltage is increased if
The ATDC Sensor sensitivity is the input voltage is less than
adjusted to the initial starter T/C (6%). 2.5 V.

The Sensor output voltage applied to IC1A is compared with the reference
voltage (2.5 V ±"ATDC T/C Ratio" setting of Tech. Rep. choice) and, if it is
higher than the reference, Sub Hopper Toner Replenishing Motor M9 is
energized.

M-74
 1136C14M

Toner-to-Carrier
Low Normal High
Ratio of Developer
1
1 Reference Wave
2 Output Wave 2

5
ATDC Output Voltage
6
Reference Voltage

Set T/C Reference Voltage

4. 0 % 2. 943 V
4. 5 % 2. 825 V
5. 0 % 2. 717 V
5. 5 % 2. 608 V
6. 0 % 2. 500 V
6. 5 % 2. 391 V
7. 0 % 2. 283 V
7. 5 % 2. 174 V

M-75
<Toner Replenishing Control by ATDC Sensor>
• UN4 samples the toner-to-carrier ratio at the following timings for each
copy
<ATDC Sampling Timing>
• Approx. 20 msec. after a LOW BASE signal, which is output from pin 2
of IC2J on SCP Board PWB-J for each scan motion, has been input to
pin 64 of IC4A on PWB-A, the ATDC Sensor takes readings at about
5-msec. intervals for about 500 msec. (i.e., taking about 100 readings).
• The ATDC Sensor output voltages are applied to pin 80 of IC1A on
PWB-A and averaged. The average value of the readings sampled is
compared with the reference voltage, which represents the "ATDC T/C
Ratio" setting made by the Tech. Rep. Choice and toner is replenished
in either of the following four modes.
➀ Large Amount Replenishing
• If the sensor output voltage is lower than the "ATDC T/C Ratio" setting
by 0.5% or more, Sub Hopper Toner Replenishing Motor M9 is
energized as follows.
Replenishing Time (A4) Amount Replenished (A4)
∗1)
885 msec. (∗ Approx. 133 mg

➁ Small Amount Replenishing

• If the sensor output voltage is lower than the "ATDC T/C Ratio" setting
by less than 0.5%, M9 is energized as follows.
Replenishing Time (A4) Amount Replenished (A4)
∗1)
445 msec. (∗ Approx. 66.5 mg

➂ Fixed Amount Replenishing

• If the sensor output voltage is higher than the "ATDC T/C Ratio" setting
by less than 1%, M9 is energized as follows.
Replenishing Time (A4) Amount Replenished (A4)
∗1)
90 msec. (∗ Approx. 13.3 mg

➃ No toner replenishing
• No toner is replenished if the sensor output voltage is higher than the
"ATDC T/C Ratio" setting by 1.0% or more.

NOTES
• The toner replenishing time and the amount of toner replenished vary
according to the paper size.
• As a rule, toner is replenished based on the detection by UN4. If
erroneous toner replenishing occurs due to a faulty UN4, however, AIDC
Sensor UN3 comes into play for correct toner replenishing.

(*1): M9 is actually energized 50 msec. earlier to take into account the rise
time of the motor.

M-76
 Base Signal
Approx. 500msec.
Approx. 5msec.
Approx. 20msec.
ATDC Sensor Sampling
ON T1msec.
Sub Hopper Toner
Replenishing Motor M9 ON

1136T73MCA
T1: Varies according to the ATDC Sensor out put Voltage and paper size.

13-6. ATDC Sensor Self Recovery Function

(1) Control for Faulty ATDC Sensor
• If ATDC Sensor UN4 malfunctions, toner is not replenished correctly,
resulting in image trouble and toner spillage.
• This copier is provided with a function that switches from UN4 to AIDC
Sensor UN3 as a means of toner replenishing control in case UN4
malfunctions.

<ATDC to AIDC Switching Control>

Main Drive Motor M1 is energized

(copy cycle being run).

<Master Board PWB-A>

Is the ATDC Sensor output voltage to be applied to pin 80 of IC1A
abnormal (0.1V or less, or 4.6V or more)?
NO YES

If the voltage is normal, the If the voltage is abnormal,

toner replenishing control is the copier determines that
provided by means of UN4. the ATDC Sensor is faulty.

NO
Malfunction code: C0F30 Is UN3 operational?
Faulty ATDC Sensor
YES

Toner replenishing control is

provided by means of UN3.

• When UN3 is used for the toner replenishing control, the "ATDC T/C
Ratio" setting made by the Tech. Rep. Choice becomes invalid and the
standard T/C of 6% is used at all times.
• During toner replenishing control by UN3, the function "Toner
Replenisher" of the User Mode is disabled.
• If UN4 is repaired or replaced and becomes fully operational, UN4 takes
the place of UN3 for the toner replenishing control as soon as the current
copy cycle is completed.

M-77
<Toner Replenishing Control by AIDC Sensor>
• An AIDC pattern is produced on the surface of the PC Drum by Image
Erase Lamp LA2 and AIDC Sensor UN3 detects the amount of toner
attracted onto that pattern.
• The AIDC pattern is produced and UN3 takes a reading for each copy
cycle between two sheets of paper or after a sheet of paper is fed out as
detailed below.

Exposure Lamp LA1 is turned OFF approx. 250 msec. after a LOW
SCEND signal has been output from pin 3 of IC2J on SCP Board
PWB-J for each scan motion.

A given period of time thereafter, all LA2 LEDs are turned ON.

Approx. 600 msec. after LA1 has been turned OFF, the LA2 LED
above the AIDC Sensor is turned OFF and kept OFF for approx. 100
msec., thereby producing an AIDC pattern on the surface of the PC
Drum.
(In a multi-copy cycle, LA1 is turned ON after each
AIDC pattern has been produced.)
Approx. 490 msec.
UN3 samples the AIDC pattern for approx. 50 msec.
(In a multi-copy cycle, the Scanner begins the scan motion for the
subsequent copy approx. 160 msec. after the sampling sequence has
been completed.)

The AIDC Sensor voltages output from UN3 are applied to pin 79 of
IC1A on Master Board PWB-A and averaged. The average value of the
outputs is compared with the reference voltage equivalent to T/C 6%
and toner is replenished in either of the following four modes.
AIDC Sensor Replenishing Replenishing Amount
Output Voltage Mode Time (A4) Replenished (A4)
Large amount 1283 msec.
DC0V to 3V Approx. 190 mg
replenishing ∗1)
(∗
Medium amount 887 msec.
DC3V to 3.6V Approx. 131 mg
replenishing ∗1)
(∗
Small amount
DC3.6V to 4.2V ∗1)
89 msec. (∗ Approx. 13 mg
replenishing
No toner
DC4.2V to 4.7V  
replenishing

NOTE
The toner replenishing time and the amount of toner replenished vary
according to the paper size.

(*1): M9 is actually energized 50 msec. earlier to take into account the rise
time of the motor.

M-78
 L
SCEND Signal

Approx. 220msec.
Exposure Lamp LA1 OFF
Approx. 600msec.
Approx. 100msec.

Image Erase Lamp All ON

LA2 Edge Erase
AIDC Pattern Produced Approx. 490msec.
Approx. 50msec.
AIDC Sensor UN3
ON
Sampling
T1msec.
Sub Hopper Toner
ON
Replenishing Motor M9

T1: Varies according to the ATDC Sensor out put Voltage and paper size.
1136T59MCA

(2) Control for Abnormally Low T/C

• Any of the following faulty conditions could cause a steep drop in T/C,
resulting in image trouble and carrier scattering.
➀ Defective Sub Hopper Toner Replenishing Motor M9
➁ Plugged toner supply path
➂ Defective Sub Hopper Toner Empty Switch S106
➃ A large number of copies are made from originals with image
density higher than the specifications.
• When ATDC Sensor UN4 detects an abnormally low T/C due to any of
the above reasons during a copy cycle, the self recovery function of the
copier interrupts the current copy cycle to replenish the supply of toner
temporarily.

<Detecting Conditions>
• If the T/C detected by UN4 is lower than the "ATDC T/C Ratio" setting by
2% or more, the copier determines that the T/C is abnormally low.
• An abnormally low T/C is not detected, however, when a toner-empty
condition has been detected or UN4 found faulty.

• If an abnormally low T/C is detected, the paper take-up motion will be

brought to an immediate stop and M9 is energized to replenish the
supply of toner.

M-79
 • Here is a toner replenishing sequence performed when an abnormally
low T/C is detected.
<Master Board PWB-A>
• The ATDC Sensor output voltage applied to pin 80 of IC1A indicates an
abnormally low T/C (T/C is lower than the "ATDC T/C Ratio" setting by
2% or more). The copier determines that the T/C is abnormally low.

• After the copy cycle has been completed for the paper which has been
taken up and fed in, the next paper take-up sequence is interrupted and,
instead, Sub Hopper Toner Replenishing Motor M9 is energized.

• While M9 is being energized (toner is being replenished), ATDC Sensor

UN4 takes readings at about 5 msec. intervals for about 500 msec. to
check for T/C.

Has the T/C increased by 1%?

YES NO

• M9 is deenergized and the • The readings are taken at the

copy cycle is resumed after the same timings again to check for
toner replenishing motion has T/C.
been brought to a stop. (Control • If T/C is not increased even after
is now passed back onto these operations for 140 sec., the
normal toner replenishing.) sequence goes to the next step.

• The toner replenishing sequence is further continued, while UN4 takes

readings at the same timings to check for T/C.

YES
Has the T/C increased by 2%?

NO

• The readings are taken at the same timings again to check for T/C.
• If T/C is not increased even after these operations for 80 sec., the copier
shows the following malfunction code on the Touch Panel.
Malfunction Code: C0072 (Defective M9)

M-80
13-7. Sub Hopper Toner Replenishing Mechanism/Control
<Toner Replenishing Mechanism>
• The ATDC Sensor output voltage (T/C ratio) and the paper size
determine the toner replenishing time.
• A toner replenishing sequence is carried out when Sub Hopper Toner
Replenishing Motor M9 at the front of the PC Unit is energized.
Sub Hopper Toner Supply
Roller
Sub Hopper Toner Gear B Bucket Roller
Replenishing Motor Gear A
M9

Sub Hopper Developer

Conveying/Agitating
Screw

Sleeve/Magnet
Roller Rear of Copier

Front of Copier
1134M014AA

M9 is energized.

Gear A on the motor shaft is turned, which turns Gear B counterclockwise.

The Sub Hopper Toner Supply Roller is turned counterclockwise feeding

toner from the Sub Hopper to the Bucket Roller of the Developer Mixing
Chamber.

The toner supplied is mixed with the developer by the Bucket Roller and
Developer Conveying/Agitating Screw so that toner and carrier become
sufficiently triboelectrically charged.

M-81
<Toner Replenishing Control>
• When the copier determines that toner replenishing is necessary based
on the ATDC output voltages, M9 is controlled by the M9 Remote signal
output from pin 50 of IC4A on PWB-A.

<Operation>
After detection by ATDC Sensor or AIDC Sensor
(if ATDC Sensor is faulty)

<PWB-A>
According to the Sensor output voltage and the paper size
being used, a LOW Remote signal is output from pin 50
(APA2) of IC4A for a given period of time.

M9 is energized.

1136C15M

M-82
13-8. Sub Hopper Toner Empty Detection Control
• A toner-empty condition in the Sub Hopper is detected by the magnet
fitted to the Sub Hopper Toner Empty Detecting Lever and Sub Hopper
Toner Empty Switch S106.
• The Sub Hopper Toner Empty Detecting Lever rides on the eccentric
cam fitted to the rear of the Sub Hopper Toner Agitating Lever. It is
moved up and down as the eccentric cam is turned by the drive
transmitted from Main Drive Motor M1.
• While the amount of toner in the Sub Hopper is more than the
predetermined one, the Sub Hopper Toner Empty Detecting Lever rests
on toner and does not make the up-and-down motion. S106 therefore
remains deactuated.
• When the amount of toner in the Sub Hopper is less than the
predetermined one, the Sub Hopper Toner Empty Detecting Lever is
moved up and down by the eccentric cam. This results in S106 being
repeatedly actuated and deactuated. When the number of times S106 is
actuated exceeds a predetermined value, the copier CPU determines
that the Sub Hopper has run out of toner.

Sub Hopper Toner

Magnet Empty Detecting
Lever

Eccentric Cam

Sub Hopper Toner

Empty Switch S106

(Toner Empty) (Toner Full)

M-83
<Control>
• Toner Empty Detection Control
The Sub Hopper toner empty detection sequence is carried out while the
Developing Unit remains energized.

Sub Hopper Toner Empty Switch S106 is actuated.

Master Board PWB-A

A LOW Sub Hopper Toner Empty signal is input to pin 57 (APB1) of IC4A.

Main Hopper Toner Replenishing Motor M8 is energized to turn the Toner

Bottle one turn, thus replenishing toner from the Main Hopper to Sub
Hopper.

The Toner Bottle is turned one turn each to let the Main Hopper supply
toner to the Sub Hopper until the Sub Hopper Toner Empty signal input to
pin 57 of IC4A remains HIGH for 2 sec.

The above operations are repeated and, if the Sub Hopper Toner Empty
signal does not remain HIGH for 2sec. even after the Toner Bottle has
been turned ten turns, the Toner Bottle is not turned again.

The copier determines that there is a toner-empty condition in the Sub

Hopper, giving the toner-empty message on the Touch Panel.

• Control After Toner Empty Detection

The Front Door is swung down, Toner Bottle

replaced, and the Front Door closed.

Master Board PWB-A

M8 is energized to turn continuously the Toner Bottle so that toner is
supplied from the Main Hopper to Sub Hopper.

As soon as the signal from S106 remains HIGH for 2sec., M8 is

deenergized to stop the Toner Bottle.

The toner-empty message on the Touch Panel goes out.

NOTE: If the toner-empty message is not reset by opening and closing the
Front Door once, try opening and closing the door one more time.

M-84
 Toner Empty Detection

ON
Main Drive Motor M1 OFF Toner Empty Detection
Approx. 1.6sec.

Sub Hopper Toner ON

Empty Switch S106 OFF

T T T
Main Hopper Toner ON
Replenishing Motor M8 OFF
Toner Bottle Turned 10 Turns

T : Time which Toner

Bottleis Turned 1 Turn
1136T60MCB

After Toner Empty Detection

Front Door Interlock ON

Switch S21 OFF

ON
Main Drive Motor M1 Time which Toner
OFF
Bottle is Turned 1 Turn

Main Hopper Toner ON

Replenishing Motor M9 OFF

Sub Hopper Toner ON

Empty Switch S106 OFF
2sec.
ON
Add Toner Indicator
OFF
1136T61MCA

1136C16M

M-85
13-9. Main Hopper Toner Replenishing Mechanism/Control
• When Sub Hopper Toner Empty Switch S106 is actuated, it energizes Main
Hopper Toner Replenishing Motor M8 to turn the Toner Bottle one turn,
thereby supplying toner from the Main Hopper to Sub Hopper.
<Mechanism>
Main Hopper Toner Replenishing Motor M8 is energized.

The Home Position Detecting Plate on the M8 shaft is turned and, at the
same time, the Coupling is turned.

Since the two pins on the Toner Bottle fit into the slots in the Coupling, the
Coupling and Toner Bottle are turned together.

When the indentation on the Toner Bottle moves past the protrusion on the
Toner Bottle Holder, the Toner Bottle is vibrated to prevent some of the toner
from remaining unconsumed in the Bottle.

Since the Toner Supply Port in the Toner Bottle is aligned with the Toner
Supply Hole in the Coupling, toner in the Toner Bottle drops down as the
Supply Hole becomes located at the bottom.
Toner Bottle
Home Position Toner Bottle
Sensor PC35
Toner Bottle

Toner Supply Port

Toner Supply
Hole
Toner Bottle
Holder

Home Position
Detecting Plate

Coupling Main Hopper Toner

Replenishing Motor M8

M-86
<Control>
• Toner Bottle Home Position Sensor PC35 ensures that the Toner Bottle is
stopped so that its Toner Supply Port is located at the top.
Sub Hopper Toner Empty Switch S106 is actuated.

Master Board PWB-A

A LOW M8 ON signal is output from pin 51 (APA3) of IC4A.

Main Hopper Toner Replenishing Motor M8 is energized.

Toner Bottle Home Position Sensor PC35 is unblocked.

Master Board PWB-A

A HIGH Non-Home Position signal is input to pin 56 (APB0) of IC4A. (This
means that M8 has turned.)

PC35 is blocked.

Master Board PWB-A

A LOW Home Position signal is input to pin 56 (APB0) of IC4A.

The M8 ON signal from pin 51 (APA3) of IC4A goes from LOW to HIGH.

M8 is deenergized.

1136C17M

M-87
13-10. Swinging Out/In the Main Hopper
• To replace an empty Toner Bottle, the user first needs to swing the Toner
Bottle Holder out 40° to the front. There is a flat spring installed on the Sub
Hopper Holder, which causes the Toner Bottle Holder to click out of, and
into, the locked position.
• The Holder pivots about the Toner Supply Port as it is swung out or in,
which effectively prevents toner from spilling when the Holder is swung out
or in. The Coupling is provided with a locking mechanism that prevents the
Toner Bottle from turning when it is removed or installed.
<When the Toner Bottle Holder is in Position>
• Since the flat spring fits into the front ^ notch of the Toner Bottle Holder,
the Holder is locked in position. At this time, the bottom of the Coupling
Lock Lever is pushed in by a part (∗) of the Sub Hopper, keeping the
Coupling free.

Flat Spring

Coupling Lock
Lever Front

Toner Bottle Holder

∗
Rear

<When the Toner Bottle Holder is Swung Out>

• The Toner Bottle Holder pushes the flat spring down and moves over it
until the flat spring then fits into the rear ^ notch. This locks the Toner
Bottle Holder in position. At this time, the Coupling Lock Lever is free
and the spring acts to lock the Coupling in position with the Lock Lever.

Coupling
Toner Bottle

Coupling Lock
Lever

Front

Rear
Flat Spring

M-88
13-11. Developing Bias
• A negative voltage (Vb = Developing Bias voltage) is applied to the Sleeve
Roller to prevent a foggy background on the copy. The amount of toner
attracted onto the surface of the PC Drum depends on how much lower the
PC Drum surface potential (Vi) is than Vb (i.e., the potential difference).
• Because the Magnet Roller of this copier is movable, a flat spring is fitted
to the Bias Terminal, allowing the Bias Terminal to follow the movement of
the Magnet Roller.

DS Collar

Bias Connector

Sleeve/Magnet
Roller

Front
Bias Terminal
◆ Here is the control timing chart.

Start Key ON
OFF

Main Drive Motor ON

M1 OFF
Approx. 150msec.
ON
Developing Bias
OFF
1136T33MCA

M-89
14 PAPER TAKE-UP/FEED SECTION
14-1. Construction
1 2
3 4 5 6
7

22 8
11
23 9
21
10
12
13
14

15
16

17
18 1134M019AA
24 20 19

1. Synchronizing Roller 13. 1st Drawer Separator Roll

2. Paper Leading Edge Detecting 14. 2nd Drawer Vertical Transport
Sensor PC55 Sensor PC64
3. Transport Roller Sensor PC54 15. Lower Vertical Transport Roller
4. Transport Rollers 16. 2nd Drawer Feed Roll
5. Manual Bypass Feed Roll 17. 2nd Drawer Separator Roll
6. Manual Bypass Take-Up Roll 18. 2nd Drawer Paper Take-Up
7. Multi Bypass Table Sensor PC57
8. Manual Bypass Separator Roll 19. 2nd Drawer Paper Take-Up Roll
9. 1st Drawer Vertical Transport 20. 2nd Drawer Lift-Up Sensor PC66
Sensor PC63 21. 1st Drawer Paper Take-Up Roll
10. Upper Vertical Transport Roller 22. 1st Drawer Lift-Up Sensor PC65
11. 1st Drawer Paper Take-Up 23. 1st Drawer Paper Lifting Plate
Sensor PC56 24. 2nd Drawer Paper Lifting Plate
12. 1st Drawer Feed Roll

M-90
14-2. Drawer-in-Position Detection
• When the drawer is slid into the copier, Drawer Set Detecting Lever A is
pushed in the direction of the arrow, which blocks the Drawer Set
Sensor (PC61/PC62, goes LOW).

Rear

1st/2nd Drawer
Front Set Sensor
PC61, 62

1134C02CA

M-91
14-3. Drawer Paper Lifting/Lowering Mechanism/Control
(1) Metric Areas
• The paper lifting mechanism raises the paper in the drawer so that the
top of the paper stack is pressed against the Paper Take-Up Roll at a
constant pressure.
• When slid into the copier, the drawer presses the Drawer Set Lever
which engages Lift-Up Motor Gear 1 with Paper Lifting Arm Gear 2.
• At the same time, the Drawer Set Sensor (PC61/PC62) is blocked (goes
LOW) and after 1msec., the Lift-Up Motor (M13/M14) starts turning,
causing the Paper Lifting Arm to raise the Paper Lifting Plate.
• When the drawer is slid out, Lift-Up Motor Gear 1 is disengaged from
Paper Lifting Arm Gear 2, lowering the Paper Lifting Plate.

Rear
Gear 2 Gear 1

Paper Lifting Arm

1st/2nd Drawer
Lift-Up Motor
M13/14

Front

When Drawer is Slid in

1st/2nd Drawer Lift-Up • The Paper Lifting Arm further raises the
Sensor (PC65/PC66) paper after the top sheet of paper is
pressed against the Paper Take-Up Roll.
As the light blocking plate blocks the
Lift-Up Sensor (goes LOW), the Lift-Up
Motor (M13/M14) stops.

1st/2nd Drawer Set

Sensor PC61/62
1sec.
1st/2nd Drawer Paper
Lift-Up Motor M13/M14 Energlzed

1st/2nd Drawer Paper Blocked L

Paper Present
Empty Sensor PC101/102
Blocked L
Lifting Upper Limit
1st/2nd Drawer Paper
Position Delected
Lift-Up Sensor PC65/66
1134T255MCA

M-92
During Copying

• As sheets of paper are used, the Paper

Take-Up Roll lowers accordingly,
unblocking the Lift-Up Sensor (PC65/66,
goes HIGH).

• The Lift-Up Motor (M13/14) starts

running, raising the paper stack until the
Lift-Up Sensor (PC65/66) is blocked
(output goes LOW).

• Energizing and deenergizing of the Lift-Up Motor keeps constant the

pressure between the Paper Take-Up Roll and paper regardless of
the height of the paper stack.

1134C03MCA

M-93
(2) Inch Areas
<Paper Stack Lifting>
∗1
• When the Paper Descent Key (UN5/6) is pressed after the drawer has
been slid into the copier, it energizes the Lift-Up Motor (M13/14) and the
motor starts turning forward.
• The rotation of the motor is transmitted via a gear train to the worm gear
and the Paper Lifting Arm mounted on the same shaft as the worm gear
raises the Paper Lifting Plate. This raises the paper stack.
• When the top of the paper stack is pressed against the Paper Take-Up
Roll and the paper stack is further raised, the light blocking plate of the
Paper Take-Up Roll Assy blocks the Lift-Up Sensor (PC65/66). This
deenergizes the Lift-Up Motor and the paper stack raising motion is
completed.
• As the paper is consumed and the top level of the paper stack lowers,
the Lift-Up Sensor is unblocked. Then, the Lift-Up Motor is energized
again to raise the paper stack until the Lift-Up Sensor is blocked again.
This means that a constant pressure is maintained between the paper
and the Paper Take-Up Roll regardless of the amount of paper still
available for use.
∗1: The Lift-Up Motor is energized at the following timings, in addition the
press of the Paper Descent Key (UN5/6).

• Turning ON the Power Switch

• Opening and closing the door
• Operating the panel
• Detecting a sheet of paper on the Multi Bypass Table
• Detecting an original in the AFR-9
• Raising and lowering the Original Cover, etc.

Paper Lifting Arm

Worm Gear

1st/2nd Drawer Paper

Lift-Up Motor M13/14 1st/2nd Drawer Paper Descent Key UN5/6

M-94
• Paper lifting timings are as follows.

1st/2nd Drawer Lift-Up

When Drawer is Slid in Sensor PC65/66

1st/2nd Drawer Paper ON

Descent Key UN5/6 OFF

1st/2nd Drawer Lift-up L

Sensor PC65/66 H

1st/2nd Drawer Lift-up ON

Motor M13/14 UP OFF

1136T63MCA

During Copying

1st/2nd Drawer Lift-up L

Sensor PC65/66 H

1st/2nd Drawer Lift-up ON

Motor M13/14 UP OFF

1136T64MCA

1134C04MBA

M-95
<Paper Stack Lowering/Drawer Lock>
◆ Paper Stack Lowering
• When the Paper Descent Key (UN5/6) is pressed or the drawer runs out
of paper during a copy cycle, the Lift-Up Motor (M13/14) is energized to
turn backward.
• The rotation of the motor is transmitted via a gear train to the worm gear
and the Paper Lifting Arm mounted on the same shaft as the worm gear
lowers.
• When the Lower Limit Position Sensor (PC69/70) is blocked by the light
blocking plate of the worm gear, it deenergizes the Lift-Up Motor
(M13/14). This completes the paper stack lowering motion. (At a
paper-empty condition)
• When the Paper Descent Key (UN5/6) is pressed, the Lift-Up Motor is
deenergized when the Lower Limit Position Sensor (PC69/70) is
unblocked after it has been blocked. This unlocks the drawer. (For more
details, see "Drawer Locking Mechanism" that follows.)

1st/2nd Drawer Lower Limit Light Blocking Plate

Position Sensor PC69/70
◆ Drawer Locking Mechanism
• The Lock Lever on the bottom of the drawer contacts
When Drawer is Slid in the Drawer Guide Frame of the copier and then slides
Drawer Guide Frame over the frame.
• The drawer is locked in the copier when the Lock Lever
drops into the slot in the Drawer Guide Frame.

Lock Lever
• Pressing the Paper Descent Key (UN5/6) starts the
When Drawer is paper lowering motion.
Unlocked • The worm gear is turned downward until its light
blocking plate has passed through and below the
Drawer Spring Lower Limit Position Sensor (PC69/70), blocking and
then unblocking it. This is so the worm gear can reach
down low enough to push the Lock Lever downward
and unlock the drawer.
• When the drawer is unlocked, the Drawer Spring in the
rear of the drawer pushes the drawer out to the front
approx. 70 mm.
• Once the drawer is pushed out, the drawer Set Sensor
(PC61/62) is unblocked. This reverses the Lift-up
Motor (M13/14) and briefly turns the worm gear upward
until its light blocking plate reblocks the Lower Limit
Position Sensor (PC69/70), returning the Lock Lever to
the locking position.

M-96
◆ Here are the timings for the paper stack lowering and drawer locking
motions.
At Paper Empty
1st/2nd Drawer Paper Empty L
Board PWB-E1/E2 H

1st/2nd Drawer Lift-up ON

Motor M13/14 DOWN OFF

1st/2nd Drawer Lower Limit L

Position Sensor PC69/70 H

1136T65MCA

When 1st/2nd Drawer Paper Descent Key UN5/6 is Pressed

1st/2nd Drawer Paper ON
Descent Key UN5/6 OFF

1st/2nd Drawer Lift-up ON

Motor M13/14 UP OFF

1st/2nd Drawer Lift-up ON

Motor M13/14 DOWN OFF

1st/2nd Drawer Lower Limit L

Position Sensor PC69/70 H

1st/2nd Drawer Set L

Sensor PC61/62 H

1136T66MCA

1134C05MBA

M-97
14-4. Paper Level Detection
• The amount of paper still available for use, or the paper level, of the 1st
and 2nd Drawer is detected by 1st/2nd Drawer Lift-Up Motor Pulse
Sensor PC67/68 and a pulse disk.
• The pulse disk is mounted on the shaft of the intermediary gear that
transmits drive from the Lift-Up Motor (M13/14). The speed of the pulse
disk varies with different paper levels and the number of pulses detected
by the Lift-Up Motor Pulse Sensor (PC67/68) is used to determine the
paper level.
• Counting of the number of pulses is started when the Lift-Up Motor
(M13/14) is energized and continues until the output from the Lift-Up
Sensor (PC65/66) goes LOW. The total number of pulses is translated
into the amount of paper which is shown on the Touch Panel as a
graphic marker in units of 50 sheets of paper.
• As the paper is consumed and the top level of the paper stack lowers,
the Lift-Up Motor is energized to raise the paper stack. During this time,
the Lift-Up Motor Pulse Sensor (PC67/68) detects pulses and that pulse
count is accumulated. When the count reaches 50 sheets of paper, one
segment of the paper level indicator on the Touch Panel goes out.
∗Paper Level Indicator
1st/2nd Drawer 500
Lift-Up Motor M13/14 • 1 to 50 sheets 0
1134M058AA
1st/2nd Drawer Lift-Up Motor
• 50 to 200 sheets
500
Pulse Sensor PC67/68 0
1134M059AA
Pulse Disk 500
• 200 to 350 sheets
0
1134M060AA
500
• 350 to 500 sheets
0
1134M061AA
500

• 500 sheets up 0
1134M062AA

Auxiliary Finishing Orig. Copy Basics Auxil. Func. Finishing Orig. Copy Basics

Ready to Copy. 500 Ready to Copy. 500

0
1 0
1
Auto Expo. x1.000 A4 Auto Expo. x1.000 Letter

1 1
AutoPaper A4 Manual AutoPaper Letter Manual

2 4 2
A4 A4 Letter
1 1
2 L 2 L
3 L 3 L
B4 A4 11x17 Legal
3 3
4

1134P346DA 1134P340CA

Metric Areas Inch Areas

1134C07MBA

M-98
14-5. Paper Empty Detection
(1) Metric Areas
• A paper empty condition in the 1st and 2nd Drawers is detected by 1st
Drawer Paper Empty Sensor PC101 and 2nd Drawer Paper Empty
Sensor PC102, respectively, installed in the paper take-up area of each
drawer.
• When the drawer, with no paper loaded in it, is harshly slid out of the
copier, the Paper Empty Lever can hit against the Paper Lifting Plate. To
prevent this from occurring, the Paper Empty Lever is tilted in the
direction of sliding.

Paper Lifting Plate

Paper Empty Lever

1st/2nd Drawer
Paper Empty
Sensor
PC101/102

PC101/102 (blocked) Paper Present

The paper stack raises the Paper Empty
Lever which blocks PC101/102 (goes LOW).

PC101/102 (unblocked) Paper Not Present

The light blocking plate of the Empty Lever
clears PC101/102 which goes HIGH.

M-99
(2) Inch Areas
• A paper empty detection in the 1st and 2nd Drawers is detected by 1st
Drawer Paper Empty Board PWB-E1 and 2nd Drawer Paper Empty
Board PWB-E2, respectively, installed on the underside of the Paper
Lifting Plate.
• The board is provided with a reflector type photosensor. When the
drawer is loaded with paper, the photosensor is activated by the light
reflected off the paper. The copier then considers that there is paper in
the drawer.
• If no paper is loaded, the copier considers that the drawer is
paper-empty and, at the same time, the Lift-Up Motor (M13/14) starts
turning backward to lower the Paper Lifting Plate.
• When a paper-empty condition is detected during a multi-copy cycle and
if there is another paper source (including options) loaded with paper of
the same size and in the same direction, the copier automatically selects
that second paper source to ensure an uninterrupted copy cycle
(Automatic Drawer Switching).

1st/2nd Drawer Paper

Empty Board PWB-E 1/E2

M-100
(3) Control for 1st/2nd Drawer Paper Empty Detection

The output of 1st/2nd Drawer Paper Empty Sensor PC101/102 (Metric

Areas) and 1st/2nd Drawer Paper Empty Board PWB-E1/E2 (Inch
Areas) goes HIGH.

S/P Board PWB-F

A HIGH Paper Empty signal is fed to pin 54/55 of IC1F.

The Paper Empty signal is sent to Master Board PWB-A.

The paper empty message appears on the Touch Panel.

Auxiliary Finishing Orig. Copy Basics

The current Paper Drawer is empty. 500

Please reload
0
1
Auto Expo. x1.000 A4

1
AutoPaper A4 Manual

2 4
A4 A4
1
2 L
3 L
B4 A4
3
4

1134P417EA
Metric Areas 1134C09MBA

Auxiliary Finishing Orig. Copy Basics

The current Paper Drawer is empty.

Please reload.

Auto Expo. x1.000 Auto Paper

1
AutoPaper Letter Manual

2
Letter
1
2 L
3 L
11x17 Legal
3

1134P350EA
Inch Areas

M-101
14-6. Paper Take-Up Mechanism
(1) Paper Take-Up Mechanism
• The paper take-up and feeding mechanism takes up paper from the
drawer and feeds it to the Vertical Transport Roller.
• The take-up mechanism is driven by 1st/2nd Drawer Paper Take-Up
Motor M11/12.
• Each paper take-up mechanism consists of a Paper Take-Up Roll, Feed
Roll and Separator Roll with torque limiter.
• The Separator Roll is controlled by the torque limiter so that it will not
transport more than one sheet of paper at a time.
• The wider Paper Take-Up Roll assures straight paper transport.

1st Drawer Paper Take-Up Motor M11

Paper Take-Up Roll

2nd Drawer Paper Take-Up Motor M12

Paper Feed Roll

Paper Separator Roll

Torque Limiter

M-102
(2) Paper Separating Mechanism
• The paper separating mechanism ensures that only the top sheet of
paper is fed in by separating the second sheet of paper from the top one.
• This is accomplished by the difference in friction coefficient between the
Feed and Separator Rolls.
<Normal Feeding>
• When only one sheet of paper is fed,
the friction coefficient on the top side of
the paper is equal to that on the
underside.
Feed Roll
Driven by the Feed Roll, the paper
Paper drives the Separator Roll. This causes
the paper to be sent to the Vertical
Separator Roll Transport Section.
• The friction coefficient varies for
different ambient conditions and types
of paper being used, which often
causes the Separator Roll to be
Driven or stationary stationary.

<Double Feeding>
• Since the coefficient of friction between
the top side of the first sheet of paper
Feed Roll
and the Feed Roll is greater than that
1st between the first and second sheets of
Sheet of paper, the first sheet of paper is fed into
Paper the copier by the Feed Roll.
2nd Sheet of Since the friction coefficient between
Paper the second sheet of paper and the
Separator Roll is greater than that
between the first and second sheet of
Separator Roll Stopped paper, the Separator Roll is not driven
and holds the second sheet of paper.

M-103
(3) Paper Pressure Releasing Mechanism
• If the drawer is pulled out while the paper is between the Feed Roll and
the Separator Roll, the paper is left in the copier. Removal of the paper
is difficult. With this copier, sliding out the drawer automatically
disengages the paper and Paper Take-Up/Feed Roll.
• The Paper Pressure Releasing Mechanism makes it easier to remove a
sheet of paper held between the Feed Roll and Paper Separator Roll by
just sliding out the drawer. When the drawer is pulled out, the pressure
release rail pushes down the Separator Roll Assy, disengaging the Feed
Roll from the Separator Roll.

<Drawer in Position> <Drawer Slid Out >

Separator
Feed Roll Roll Assy.

Approx. 2 mm

Drawer Pressure Spring

(4) Paper Take-up Roll Retract Mechanism

• When the drawer is slid out, the rear end of the drawer on the take-up
side and the Pressure Release Lever push up the Paper Take-Up
Roll/Feed Roll, freeing the paper from the Paper Take-Up Roll.

Paper Take-Up Front

Roll/Feed Roll Assy

Pressure
Release Lever

Rear

M-104
14-7. Vertical Transport Drive Mechanism
The Transport Roller (drive-end) is turned by Main Drive Motor M1 via a
timing belt and gear train. Since the Transport Roller is coupled by way of
an idle gear to the Vertical Transport Roller (drive-end), the Vertical
Transport Roller is turned as the Transport Roller turns.

Paper Transport Clutch Gear

Transport Roller
(driven-end)

Paper Transport
Clutch CL1

Transport Roller
(drive-end)

Idle Gear
Upper Vertical
Transport Roller
(drive-end)

Upper Vertical
Transport Roller Drive
Gear
Upper Vertical
Transport Roller
(driven-end) Timing Belt

Lower Vertical
Transport Roller
(drive-end)

Lower Vertical Transport

Roller Drive Gear
Lower Vertical
Transport Roller
(driven-end)

M-105
14-8. Paper Take-Up Control
(1) Paper Take-Up Motor Control
• A stepping motor is used for 1st/2nd Drawer Paper Take-Up Motor
M11/12. The pulse signals output from pins 1, 2, 17, and 4 of IC4F
(M11) and pins 1, 2, 17, and 4 of IC5F (M12) are applied to the four
internal coils of the motor to control the rotation of the motor. These
signals are output via S/P Board PWB-F as controlled by Master Board
PWB-A.

<Multi-copy cycle for 2 copies>

ON
Main Drive Motor M1
OFF
Paper Transport Clutch ON
CL1 OFF

1st/2nd Drawer Vertical Transport L

Sensor PC63/64 H

1st/2nd Drawer Paper Take-up L

Sensor PC56/57 H
T1 T2 T1
1st/2nd Drawer Paper Take-up ON
Motor M11/12 OFF
1st Sheet of Paper 2nd Sheet of Paper
Take-up Start Take-up Start
T1 : 5 msec. Paper take-up off timer
T2 : 5 msec. Paper take-up interval timer
1136T67MCA

1134C10MCA

M-106
(2) Paper Take-Up Retry Control
• To minimize the occurrence of paper misfeed due to a slippery Paper
Take-Up Roll, the Paper Take-Up Motor (M11/12) is kept deenergized
for 370 msec. before it is energized again, if a sheet of paper fails to
reach the Paper Take-Up Sensor (PC56/57) even after the lapse of 735
msec. after the motor has first been energized. (This is called the paper
take-up retry function.)
• A paper misfeed results if the sheet of paper does not reach the Paper
Take-Up Sensor even after two paper take-up sequences.
1st/2nd Drawer Paper Take-up L
Sensor PC56/57 H

1st/2nd Drawer Vertical Transport L

Sensor PC63/64 H
Approx. 370msec
1st/2nd Drawer Paper Take-up ON
Approx. 735msec
Motor M11/12 OFF
1
Paper Transport Clutch ON
CL1 OFF
1136T68MCA
*1: The copier determines that there is a paper misfeed if the output from the
Paper Take-Up Sensor does not go LOW even after the lapse of approx.
2.93 sec. after the paper take-up retry motion.

(3) Paper Take-Up Interval Control

• The Paper Feed Roll and Separator Roll may sometimes fail to separate
the subsequent sheet of paper properly and the leading edge of that
paper may be ahead of the Feed and Separator Rolls inside the copier.
If the Paper Take-Up Roll is started for the new paper take-up sequence
in this condition, the distance between the preceding and the current
sheet of paper will become shorter than normal, resulting in a misfeed.
• To maintain a given paper take-up interval, therefore, this copier
provides the following control, thereby preventing a paper misfeed.
• It normally takes approx. 180 msec. or more for the paper to block the
Paper Take-Up Sensor (PC56/57) (LOW) after the Paper Take-Up Motor
(M11/12) has been energized. If this timing is less than 180 msec., the
motor is deenergized temporarily and, after a given period of time, it is
energized again to provide a good interval between two paper take-ups.
(This is called the paper take-up interval control.)

Paper Take-up Start Restart

1st/2nd Drawer Paper Take-up ON
Motor M11/12 OFF

1st/2nd Drawer Paper Take-up L A Given

Sensor PC56/57 H Preriod of Time
T1 : 180msec 1134T256MCB

T1: Time it normally takes the paper to reach the Paper Take-Up Sensor
(PC56/57) after the Paper Take-Up Motor (M11/12) has been energized,
excluding that during which Paper Transport Clutch CL1 remains energized.

M-107
(4) Double Feed Control
• Even if the Paper Take-Up Roll takes up two sheets of paper at one
time, the double feed control uses the second sheet of paper for the next
copy cycle without causing a paper misfeed. It eliminates a paper
misfeed that would otherwise result when two sheets of paper are taken
up at once.
• If the second sheet of paper is stationary, blocking the Paper Take-Up
Sensor (PC56/57), when the trailing edge of the first sheet of paper
moves past the Vertical Transport Sensor (PC63/64), the copier
determines that it is a double feed condition and provides double feed
control.
• If, however, the second sheet of paper has reached the Vertical
Transport Roller (paper feeding from the 1st Drawer: Upper; paper
feeding from the 2nd Drawer: Lower), the double feed control is not
provided since the paper is fed further into the copier by the Vertical
Transport Roller. This could result in a paper misfeed or the second
sheet of paper being fed through the copier with the first one.
• If double feed control is provided, it results in the paper take-up interval
timer becoming longer. That means longer intervals between two
successive paper take-up motions, resulting in a decreased cpm
(productivity).

Paper Path 1st Drawer Vertical Transport Sensor

Detection Point
(Leading Edge Position of 2nd Sheet of Paper)
Double Feed Control
Transport Roller
(Not Provided)
Upper Vertical Transport Roller Paper Feeding
(Provided) from 1st Drawer
1st Drawer Paper Take-Up
Sensor Detection Point
2nd Drawer Vertical Transport Sensor
Detection Point
Lower Vertical Transport Roller (Not Provided)
Paper Feeding
(Provided) from 2nd Drawer

2nd Drawer Paper Take-Up

Sensor Detection Point

T2
1st/2nd Drawer Paper Take-up ON
Motor M11/12 OFF
T1 T1
1st/2nd Drawer Paper Take-up L
Sensor PC56/57 H

1st/2nd Drawer Vertical Transport L

Sensor PC63/64 H
T1 : 5msec. Paper take-up off timer
T2 : 300msec. Double Feed interval timer
1134T257MCA

M-108
(5) Vertical Transport Drive Control
• The Transport Roller and Vertical Transport Roller are turned by turning
ON and OFF the Paper Transport Clutch signal output from pin82 of
IC4A or Master Board PWB-A.
The output from Transport Roller Sensor PC54 is used for the control of
paper take-up timings.
Paper Transport Clutch CL1 is energized and deenergized at the following
timings.

L
TRON H

L
Paper Leading Edge
H
Detecting Sensor PC55

Transport Roller Sensor L

PC54 H

ON
Main Drive Motor M1
OFF

ON
Synchronizing Roller Clutch
CL2 OFF

ON Approx. 5msec.
Paper Transport Clutch
CL1 OFF Approx. 45msec. Approx. 45msec. Approx. 45msec.
1136T71MCA

1136C24M

M-109
14-9. Multi Bypass Table
(1) Construction
The Multi Bypass Table is fitted to the Right Door of the copier, integrated
into the copier. It is constructed as follows.

Right Cover
Lever
Right Door Cover
Paper Empty Sensor

Multi Bypass Table

Manual Feed Paper Take-Up Clutch

Manual Feed Paper Take-Up Solenoid

Paper Stoppers

Manual Bypass Take-Up Roll

Paper Empty Sensor

Upper Transport Roller
Manual Bypass
Manual Bypass Feed Roll Take-Up Roll

Multi Bypass Table

Paper Empty Sensor

Lower Transport Roller Actuator

Paper Stopper
Manual Bypass Separator Roll

M-110
(2) Paper Take-Up Mechanism
• The Paper Take-Up Rolls are normally in their raised (retracted) position
so that they will not hamper proper loading of paper. When the Start Key
is pressed, Manual Feed Paper Take-Up Solenoid SL4 is deenergized
causing the Manual Bypass Take-Up Rolls to press the paper stack
downward and take up a sheet of paper.

• There are the Paper Stoppers provided that block the leading edge of
the paper stack as it is loaded on the Table, preventing any portion of
the leading edge of the paper from getting inside. These Stoppers are
unlocked at paper take-up, allowing paper into the copier.

(In Standby)
• When SL4 is energized (Up side), the rack gear is pulled, which raises
the Paper Take-Up Rolls releasing the paper. At the same time, the
lever is moved to the left, which causes the Lock Levers to lock the
Paper Stoppers.
Rack Gear
Lever Manual Feed
Lock Levers Paper Take-Up
Solenoid SL4

ON (UP)

Paper Stoppers

(At Take-Up)
• When SL4 is energized (Down side), the Rack Gear is pushed, freeing
the Paper Take-Up Rolls. This allows the Paper Take-Up Rolls to press
the paper stack downward. At the same time, the lever is moved to the
right, freeing the Paper Stoppers.

ON (DOWN)

M-111
(3) Take-Up/Feed Rolls Drive Mechanism
Drive is transmitted to the Multi Bypass Table as follows.

The gear mounted on the Lower Transport Roller shaft is turned by the drive
from Main Drive Motor M1. ... (1)

The drive is transmitted to the idle gear mounted to the copier frame. ... (2)

When the Right Door is closed, the idle gear on the Multi Bypass Table
meshes with gear (2) and drive is transmitted to the Multi Bypass Table.
... (3)

Drive is transmitted to the gear on Manual Feed Paper Take-Up Clutch CL3.
... (4)

The Manual Bypass Feed Roll mounted on the same shaft as CL3 is turned.
Drive is then transmitted via the gear on the same shaft as the Manual
Bypass Feed Roll and idle gear to the Manual Bypass Take-Up Rolls. ... (5)

∗ The gears in the following illustration are keyed to the description of the
operations given above.

(1)
(2)
(3)

Manual Feed Paper

Manual Bypass Feed Roll Take-Up Clutch
(5)
(4)

Manual Bypass Take-Up Roll

Manual Bypass Separator Roll

M-112
(4) Manual Bypass Paper Separating Mechanism
The paper separating mechanism ensures that only the top sheet of paper
is fed in by separating the second sheet of paper from the top one. This is
accomplished by the Torque Limiter fitted to the Separator Roll shaft
which stops the Separator Roll when there is a change in friction between
the Feed and Separator Rolls.

1. At the Time of Double Feed:

The top sheet of paper is fed into the copier by the Feed Roll. Since the
coefficient of friction between the top and second sheets of paper is
smaller than that between the second sheet of paper and the Separator
Roll, the two sheets of paper slip and the second sheet of paper is not fed
into the copier. The driving force of the Feed Roll is at this time
neutralized by the two slipping sheets of paper and not transmitted to the
Separator Roll which is stopped by its Torque Limiter. In other words, the
force of the Torque Limiter is greater than the driving force of the Feed
Roll as it is transmitted through the two sheets of paper.

Feed Roll

Separator Roll
* Stationary in this condition.

2. Normal Feeding:
The friction coefficient on the top side of the paper is equivalent to that on
the underside. Hence, the driving force of the Feed Roll is directly
transmitted to the Separator Roll through the paper, causing the
Separator Roll to be turned by the Feed Roll. In other words, the force of
the Torque Limiter is smaller than the driving force of the Feed Roll as it is
transmitted through the paper.

M-113
(5) Manual Bypass Paper Empty Detection
The Multi Bypass Table is equipped with Manual Feed Paper Empty
Sensor PC51 which detects a sheet of paper on the Multi Bypass Table.
Since PC51 is used to determine that a paper stack is placed in position
on the Multi Bypass Table, it is activated when the leading edge of the
paper stack is pressed against the Paper Stoppers.

Manual Feed Paper

Empty Sensor PC51

Manual Bypass
Take-Up Roll

Paper Stopper
Actuator

1136C23M

M-114
(6) Manual Bypass Take-Up Roll Control
The Manual Bypass Take-Up Rolls are pressed against, and released
from, the paper stack and the Manual Bypass Take-Up/Feed Rolls are
turned by operating the clutches and solenoids with the signals from
Master Board PWB-A. See the circuit diagram below.
Operation timing is as follows.

(2 Sheets of Paper) TRON for 1st Sheet of Paper TRON for 2nd Sheet of Paper
OFF
Main Drive Motor ON
M1
OFF
Manual Feed Paper 500msec. 500msec.
ON
Take-Up Solenoid SL4 Down
OFF
Manual Feed Paper
Take-Up Solenoid SL4 UP 500msec. 500msec. ON

OFF
Manual Feed Paper
5msec. 25msec. 25msec. 25msec. ON
Take-Up Clutch SL3
145msec. 145msec. 25msec. OFF
Paper Transport 5msec. ON
Clutch SL1
250msec. 250msec. OFF
Synchronizing Roller Clutch
ON
CL2
OFF
Transport Roller ON
Sensor PC54
OFF
Paper Leading Edge ON
Detecting Sensor PC55 1136T39MCB

1136C22M

M-115
14-10. Detection of Right Upper Door in Position
• Right Upper Door Set Sensor PC40, fitted to the copier body, detects the
Right Upper Door when closed. The Vertical Transport Rollers
(driven-end) and Multi Bypass Table are mounted to the Right Upper
Door.
• Right Upper Door Interlock Switch S22 is also installed just as with the
Front Door.
• When the Right Upper Door is closed, the ribs on the door
activate/actuate PC40/S22.

Right Upper Door

Interlock Switch S22

Right Upper Door

Ribs

Right Upper Door Set

Sensor PC40

1136C25M

M-116
14-11. Paper Dehumidifying Heater
Paper Dehumidifying Heater H2 is mounted on the copier base frame
under the 2nd Drawer. It prevents the paper in the drawer from growing
damp in highly humid weather.

It works when the following conditions are met:

∗ The power cord is plugged in the power outlet.
∗ Power Switch S1 is in the OFF position.
∗ Paper Dehumidifying Switch S12 is in the ON position.

Paper Dehumidifying Heater H2

Copier Base Frame

Paper Dehumidifying Switch S12

1136C21M

M-117
15 SYNCHRONIZING ROLLERS
15-1. Construction
• The Upper Synchronizing Roller is a metal roller covered with a polyvinyl
chloride tubing. It is secured to the front and rear frames of the copier.
• The Lower Synchronizing Roller, a rubber roller, is fitted to the Transport
Assy. Pivoting about its rear end, the Lower Roller can be swung
downward to facilitate clearing of paper misfeeds.
• The following illustration shows how the rollers are laid out.

Upper Synchronizing Roller

Paper Dust Remover

Guide Plates

Lower Synchronizing Roller

Paper Leading Edge

Detecting Sensor PC55

Upper Synchronizing Roller

Lower Synchronizing Roller

Torsion Spring

M-118
15-2. Synchronizing Roller Drive Mechanism
• The Upper Synchronizing Roller receives drive from Main Drive Motor
M1 via a gear train and timing belt. The Upper Roller drives the lower
one.
• The Synchronizing Rollers are started as Synchronizing Roller Clutch
CL2 is energized.

Upper Synchronizing Synchronizing Roller Clutch CL2

Roller
To Main Drive Motor M1

Timing Belt

3-Gear Unit

15-3. Paper Dust Remover

• The Paper Dust Remover is installed so that it makes contact with the
Upper Synchronizing Roller.
• Since the Upper Synchronizing Roller is covered with a vinyl tubing,
triboelectric charging occurs as the Roller turns in contact with the Paper
Dust Remover.
• As paper is fed between the Synchronizing Rollers, the charges on the
tubing attract paper dust from the paper. The dust is then transferred
onto the Paper Dust Remover.

Upper Synchronizing Paper Dust Remover

Roller

Lower Synchronizing Roller

M-119
15-4. Synchronizing Roller Drive Control
• The Synchronizing Rollers are started as Synchronizing Roller Clutch
CL2 is energized upon reception of a CL2 signal output from pin81 of
IC4A on Master Board PWB-A.

• The start of the Rollers is synchronized with the Registration signal

(TRON).
∗ The TRON signal is output from SCP Board PWB-J at a given time after
the Image Leading Edge signal (BASE) has been output.
∗ The BASE signal is output when the Scanner reaches a given point in
its scan motion.

• The Synchronizing Rollers are stopped at a given time after the paper
has moved past Paper Leading Edge Detecting Sensor PC55.

L
TRON
H

Paper Leading Edge Detecting L

Sensor PC55 H

Transport Roller L
Sensor PC54 H

Main Drive Motor ON

M1 OFF

Synchronizing Roller ON
Clutch CL2 OFF
Approx. 110msec. Approx. 110msec. Approx. 165msec.
1134T259MCB

1136C26M

M-120
15-5. Prevention of Low Image Density on Copy
During conditions of high humidity when the paper is damp, charges
would tend to flow from the Image Transfer Corona through the paper and
guide plates to the ground. This results in low image density on the copies.
To prevent this from occurring, a plastic spacer is installed between the
copier frame and each guide plate around the Synchronizing Rollers so
that it remains insulated. Instead of using the plastic spacer, an
electrodeposition coating has been applied to some of those guide plates.
If, however, the resistance with the ground is made infinity, the guide
plate would build up charges and a spark can occur with other guide
plates, resulting in a malfunction. To prevent this, an 82-megohm resistor
and a 1-kV varistor are connected to the guide plates. The guide plates
are connected by flat springs as illustrated below.
Synchronizing Rollers
➆ ➂
➀ D
Transport
C Manual Bypass
Rollers
Feed/Separator Rolls
➄
A

B ➁
Varistor ➃
Upper Vertical
Resistor Transport Rollers
E

No. Guide Plate Name Insulation Method

➀ Upper Pre-Synch Guide Plate Plastic Spacer
➁ Lower Pre-Synch Guide Plate Plastic Spacer
Upper Transport Roller Guide
➂ Plate
None [Fitted to top of guide plate no. ➃ ]

Lower Transport Roller Guide

➃ Plate
Plastic Spacer

➄ Manual Bypass Guide Plate Electrodeposition Coating

➅ Vertical Transport Guide Plate Plastic Spacer
Fitted to plastic holder of Image
➆ Pre-Image Transfer Guide Plate
Transfer/Paper Separator Coronas

M-121
Flat Spring Connection
A Between varistor-and-resistor and guide plate ➆
B Between varistor-and-resistor and guide plate ➁
C Between guide plates ➁ and ➃
D Between guide plates ➁ and ➀
E Between guide plates ➃ and ➅

M-122
16 IMAGE TRANSFER/PAPER SEPARATOR CORONAS
16-1. Construction and Functions of Image Transfer/Paper Separator
Coronas Unit
<Construction>

Image Transfer
Corona Wire
Guide
Mylar Pre-Image Transfer
Guide Plate
Paper Separator
Corona Wire

Corona Housing Image Transfer/Paper

Separator Coronas Unit Rail

Resistor Image Transfer Corona

Wire Cleaner

M-123
<Functions>
Image Transfer
The Image Transfer Corona applies a DC negative corona emission to the
underside of the paper thereby attracting the positively charged toner onto
the surface of the paper to form a visible, developed image of the original.
The Corona Unit is provided with a Corona Wire cleaning mechanism: the
operator has only to pull out the lever on which the Cleaner is mounted
from the front of the copier, which cleans the Wire.
The mylar strips affixed to the housing of the Image Transfer Corona
minimize current that flows to the housing, thereby reducing the amount
of ozone that is produced.

Paper Separation
The Paper Separator Corona showers the underside of the paper with
both positive and negative charges so that the paper can be easily
separated from the PC Drum. In addition, two Paper Separator Fingers
physically peel the paper off the surface of the PC Drum. (For details, see
"PC Drum Paper Separator Fingers.")
Note: The Image Transfer/Paper Separator Coronas Unit is provided with
a Pre-Image Transfer Guide Plate that determines the angle at
which the paper comes into contact with the PC Drum and keeps an
optimum distance between the paper and the PC Drum so that the
image may be properly transferred onto the paper.
Note: The Image Transfer/Paper Separator Coronas Unit and Image
Transfer/Paper Separator Coronas Unit Rail are insulated from the
copier body. In addition, a 3.5-megohm resistor is connected to the
unit rail. This improves the charge application efficiency from the
Coronas Unit to the PC Drum and economizes on the output current
from High Voltage Unit HV1.

M-124
16-2. Image Transfer/Paper Separator Coronas Control
• The Image Transfer/Paper Separator Coronas are turned ON and OFF
by turning ON and OFF High Voltage Unit HV1. HV1 is turned ON and
OFF by the Image Transfer/Paper Separator Corona ON signal output
from pin83 (Image Transfer) or 84 (Paper Separator) of IC4A on Master
Board PWB-A.

Main Drive Motor ON

Approx. 285msec.
M1 OFF

Paper Separator ON
Corona OFF
Approx. 150msec.
Approx. 100msec. Approx. 160msec.
Image Erase Lamp L
LA2 MODE Signal H
Approx. 200msec.
Image Transfer ON
Approx. 5msec.
Corona OFF

Paper Exit Switch ON

S53 OFF

1134T260MCB

1136C27M

M-125
16-3. Ozone Filter
Ozone produced by the Image Transfer/Paper Separator Coronas is
absorbed by the Ozone Filter on the back of the copier. It is absorbed
from the air being drawn out of the copier through the Duct under the
Suction Deck by Suction Fan Motor M4.

Duct

Ozone Flow

(Front of Copier) To Ozone Filter

Image Transfer/Paper Separator Coronas

M-126
17 CLEANING UNIT
17-1. Construction
AIDC Sensor PC Unit

Cleaning Blade

Blade Tension
Spring

Toner Conveying Coil

PC Drum Paper Separator Finger

Back of PC Unit

Blade Moving Pin

Toner Conveying Coil Drive Gear

M-127
17-2. Cleaning Blade
(1) Cleaning Blade Pressure Mechanism
The Cleaning Blade is pressed tightly against the surface of the PC Drum
and scrapes off any toner remaining on the surface after image transfer.
The Blade Tension Spring, hooked onto the Cleaning Blade Assy
Mounting Bracket, gives an appropriate tension to the Cleaning Blade as
it is held against the surface of the PC Drum.

Cleaning Blade Pivot Cleaning Blade Assy

Assy Mounting
Bracket
(Pressed)
Residual Toner

Blade Tension Spring

PC Unit Frame

(2) Cleaning Blade Moving Mechanism

The Cleaning Blade is moved to the front and rear while the PC Drum is
turning. This is done to ensure that all residual toner is scraped cleanly off
the surface of the PC Drum and prevent the Blade edge from deteriorating.
The eccentric cam fitted to a shaft of the copier is turned, which pushes
the Blade Moving Pin on the Cleaning Blade Assy Mounting Bracket. This
results in the Cleaning Blade being moved to the front and rear.

Eccentric Cam
Timing Belt

Blade Moving Pin

Back Front
Cleaning Blade Assy Mounting Bracket

To Main Drive Motor M1

M-128
17-3. Spent Toner Collection
(1) Toner Conveying/Collecting Mechanism
• The toner which has been scraped off the surface of the PC Drum by the
Cleaning Blade is conveyed by the Toner Conveying Coil towards the
rear of the copier and falls into the Toner Collecting Box at the back of
the copier through the pipe.

• The Toner Antispill Mylar is affixed under the Cleaning Blade to receive
toner, thus preventing any toner from falling down onto the surface of
the copy paper or the paper path.

Cleaning Blade

Residual Toner
Toner Conveying Coil

Toner Antispill Mylar

Toner Conveying Coil

Toner Conveying Coil Drive
Gear (Copier)
Toner Conveying Coil Drive
Gear (PC Unit)

Spent Toner Flow

Pipe

• The type of Toner Collecting Box and the method of detection of a box
installed in position differ between the applicable marketing areas. See
the following table.

Box-in-Position
Areas Type of Box
Detection
Large-Capacity Toner
EP4050 All areas PC31 (in Cabinet)
Collecting Box (in Cabinet)
U.S.A., Canada, Large-Capacity Toner
PC31 (in Cabinet)
and Europe Collecting Box (in Cabinet)
EP3050
Standard Toner Collecting Box
Other areas PC107 (in Copier)
(in copier)

M-129
(2) Detection of Toner Collecting Box in Position
• When the Toner Collecting Box (Standard or Large Capacity) is installed
in position, the box pushes the actuator, blocking the Toner Collecting
Box Set Sensor (PC31 or PC107) (LOW).
• If no box is installed, the sensor is unblocked (HIGH), giving a warning
message on the Touch Panel and inhibiting the initiation of a new copy
cycle.
• The copier determines the condition as follows depending on the
position of DIP Switch S1-2 on PWB-A and the state of the sensor
(PC31 or PC107).

S1-2 PC107 PC31 Copier:

Regards that the standard Toner Collecting Box is
ON ON
placed in position.
Regards that the standard Toner Collecting Box is
OFF ON OFF
placed in position.
OFF ON Inhibits copying (Toner Collecting Box not yet in place).
OFF OFF Inhibits copying (Toner Collecting Box not yet in place).
ON ON Inhibits copying (Toner Collecting Box not yet in place).
ON OFF Inhibits copying (Toner Collecting Box not yet in place).
ON Regards that the Large Capacity Toner Collecting Box is
OFF ON
placed in position.
OFF OFF Inhibits copying (Toner Collecting Box not yet in place).

Toner Toner PWB-A

Pipe PWB-A Pipe

Toner
Collecting
Copier Box

Cabinet

PC31 PC107
Actuator Actuator

Toner Collecting Box (EP3050, except U.S.A., Canada, and Europe)

M-130
 1136C28MCA

M-131
17-4. PC Drum Paper Separator Fingers Moving Mechanism/Control
<Paper Separator Finger Swinging Mechanism>
• After image transfer, an AC corona emission is applied to the underside
of the paper by the Paper Separator Corona to neutralize the paper so
that it can be easily separated from the PC Drum. To further ensure that
the paper is positively separated from the PC Drum, there are two Paper
Separator Fingers installed. They physically peel the paper off the
surface of the PC Drum. (For details of AC corona emission, see "16.
IMAGE TRANSFER/PAPER SEPARATOR CORONAS.")
The Paper Separator Fingers are swung up and down by Separator
Solenoid SL1.

Separator Solenoid SL1

PC Drum Paper
Separator Finger Shaft
Swash Plate Cam
Return
Spring

PC Drum Paper
Separator Finger

Pivot
Finger
Pawl (A) Operating Lever

M-132
<Paper Separator Finger Front-to-Back Moving Mechanism>
• To prevent the Paper Separator Fingers from damaging the surface of
the PC Drum, they are moved over a given distance to the front and rear
so that they will contact wider areas of the surface of the PC Drum, thus
preventing localized damage of the PC Drum surface.

• The Swash Cam mounted on the Pivot Pin of the Finger Operating Lever
is moved through steps by means of the Ratchet and SL1, causing the
Swash Cam to push the Finger Shaft.

• The lateral movement of the Paper Separator Fingers is 3.5 mm (which

is equivalent to 60 times energization and deenergization operations of
SL1).

SL1 Energized

Pawl (A) is raised.

The Swash Plate is locked in

position by Pawl (B).

SL1 Deenergized

Ratchet Wheel Swash Cam

Paper Separator Finger Shaft

Pawl (A) pushes the Swash Cam
downward to turn it one notch.

M-133
<PC Drum Paper Separator Finger Control>
• The PC Drum Paper Separator Fingers are moved by energizing and
deenergizing Separator Solenoid SL1 as commanded by a Finger ON
signal output from pin71 of IC4A on Master Board PWB-A.

(Multi-copy cycle for 2 copies)

L
TRON
H

Synchronizing Roller ON
Clutch CL2 OFF
Approx. 190msec. Approx. 190msec.
Separator Solenoid ON
SL1 OFF
Approx. 150msec. Approx. 150msec.
1134T261MCB

1136C29M

M-134
17-5. Cleaning Bias (Option)
• A Cleaning Bias Seal can be installed optionally. It minimizes damage to
the PC Drum from acid paper.

Toner Antispill Mylar

PC Drum

Cleaning Bias Seal

• The Cleaning Bias is controlled by turning ON and OFF High Voltage

Unit HV1.
• HV1 is turned ON and OFF by the Cleaning Bias signal output from
pin83 of IC4A on Master Board PWB-A.

Main Drive Motor ON

M1 OFF
Approx. 150msec.
H
Cleaning Bias
L

1134T262MCA

1136C30M

M-135
18 MAIN ERASE LAMP
18-1. Construction
• Main Erase Lamp LA3 consists of ten tungsten-filament lamps mounted
side-by-side on a board. A filter is installed between LA3 and the PC
Drum to protect LA3 from contamination.

• LA3 projects light onto the surface of the PC Drum to neutralize any
surface potential remaining after image transfer.

Main Erase
Main Erase Lamp LA3
Lamp Board

Filter

M-136
18-2. Main Erase Lamp LA3 ON/OFF Control
• LA3 is turned ON and OFF by the LA3 ON signal output from pin68 of
IC5A on Master Board PWB-A.

• A faulty LA3 is detected by the signal input to pin3 of IC4A on PWB-A.

• The ON/OFF timing of LA3 is as follows.

Main Drive Motor ON

M1 OFF
Approx. 100msec.
Image Erase Lamp L
Approx. 160msec.
LA2 MODE Signal H
Approx. 200msec.
Main Erase Lamp ON Approx.
LA3 OFF 285msec.

Approx. 5msec.
PC Dram Charge/Image ON
Transfer Coronas OFF

Paper Exit Switch ON

S53 OFF

1134T263MCB

1136C31M

M-137
19 PAPER TRANSPORT
19-1. Construction
• The Transport Section consists of the following parts.
Pulling the Transport Section Release Lever down swings the Transport
Section down, pivoting at the rear of the copier. This facilitates clearing
of misfeeds.

• Suction Fan Motor M4 draws the paper onto the turning Suction Belts.
It also pulls the paper down as it reaches the Pre-Fusing Guide Plate to
ensure that the paper is smoothly fed into the Fusing Unit.

• As M4 turns, ozone produced by the Image Transfer/Paper Separator

Coronas is absorbed by the Ozone Filter from the air being drawn out of
the copier.

Suction Fan

Ozone Filter

Suction Belts
Suction Drive Gear

Transport Section Release Lever

M-138
19-2. Suction Belt Drive Mechanism
The Suction Belts are driven by Main Drive Motor M1 through a timing
belt and gear train.

Suction Belt
Suction Belt Drive Roller

Suction Drive Gear

Timing Belt

Main Drive Motor Gear

M-139
19-3. Suction Fan Motor M4 Drive Control
• The speed of Suction Fan Motor M4 is switched between full and half
speed by the M4 ON signal output from pin 70 of IC4A on Master Board
PWB-A.

• A faulty M4 is detected by the Lock signal input to pin 87 of IC4A on

PWB-A.

• M4 is energized at the following timing.

Main Drive Motor ON

M1 OFF
Approx. 5msec.
Suction Fan Motor High Speed
M4 Low Speed
Approx. 150msec.
Paper Separator ON
Corona OFF

1134T264MCA

1136C32M

M-140
20 FUSING UNIT
20-1. Construction and Drive Train
• The Upper Fusing Roller and Lower Fusing Roller together apply heat and
pressure to the toner and paper to permanently fix the developed image to
the paper. The Cleaning Roller is installed for the cleaning of the Fusing
Rollers.
Upper Fusing Paper Cleaning Roller
Separator Finger Fusing Front/Rear
Thermistor TH1/2

Fusing Thermoswitch
1st Paper Exit Roller TS1

Fusing Heater Lamp H1

Upper Fusing Roller

Lower Fusing Roller

Pressure Spring

Lower Fusing Paper

Separator Finger

• Drive for the Upper Fusing Roller and Cleaning Roller is transmitted from
Main Drive Motor M1 to the Upper Fusing Roller Drive Gear and Cleaning
Roller Drive Gear via Timing Belt C and a gear train. The Lower Fusing
Roller is driven by the Upper Fusing Roller in contact with it.

Cleaning Roller

Upper Fusing
Roller Cleaning Roller Drive Gear

Lower Fusing
Roller

Main Drive
Motor M1
Upper Fusing Roller
Drive Gear

Timing Belt C

M-141
20-2. Fusing Rollers

<Upper Fusing Roller>

• Employed is a teflon-coated roller which features wear resistance and
makes for improved fusing performance. It also repels the adherence of
melted toner. Further, a conductive coating has been applied to the
surface of the Upper Fusing Roller, thereby neutralizing any charges.
<Lower Fusing Roller>
• An elastic silicone rubber is used for the Lower Fusing Roller, offering a
wider area of contact between the two Fusing Rollers. Since the roller is
cleaned only indirectly, the silicone rubber is covered with a teflon
tubing. This contributes to preventing smear on the Roller.

Aluminum Cylinder
Upper Fusing Roller
Teflon Coating

Teflon Tubing

Lower Fusing Roller Silicone Rubber

20-3. Fusing Rollers Pressure Mechanism

• To ensure that there is a certain width of area of contact between the
Upper and Lower Fusing Rollers, the Pressure Springs are hooked onto the
Pressure Holders at the front and rear ends of the Lower Fusing Roller.
• The other end of each of the Pressure Springs is hooked to the Pressure
Lever, into which a Pressure Screw is installed. When the Pressure Screws
are tightened, the Pressure Holders are raised. As a result, the Lower
Fusing Roller is brought into tight contact with the Upper Fusing Roller.

Upper Fusing Roller

Rear

Front

Pressure Screw
Lower Fusing Roller Pressure Lever

Pressure Holder

Pressure Spring

M-142
20-4. Fusing Roller Cleaning Mechanism
• The Cleaning Roller is held pressed against the Upper Fusing Roller to
remove toner and paper dust from the Upper Fusing Roller.
• The Cleaning Roller turns in the direction opposite to the Upper Fusing
Roller and toner and paper dust on the surface of the Upper Fusing Roller
stick to the brush of the Cleaning Roller. It also supplies silicone oil to the
surface of the Upper Fusing Roller, thereby helping the Roller repel the
adherence of melted toner and preventing paper from being wound around
it.

Cleaning Roller

Upper Fusing Roller

Lower Fusing Roller

• The Cleaning Roller is a hollow aluminum pipe into which silicone oil has
been packed. The surface of the aluminum pipe has many holes. Paper is
wrapped around this aluminum pipe to hold the silicone oil and is covered
with an oil-impregnated brush.

Silicone Oil Aluminum Pipe

Paper
Brush

M-143
20-5. Paper Separator Fingers
• Each of the two Fusing Rollers is provided with Paper Separator Fingers
that strip the paper from the surface of the Rollers.

◆ Upper Fusing Paper Separator Fingers

• The Upper Fusing Paper Separator Fingers have been coated with
teflon so that they will not be contaminated with toner.
• The tip of each Separator Finger is at all times pressed against the
surface of the Upper Fusing Roller by a pressure spring. The fingers are
laid out as illustrated below, as paper registration is to one side in this
copier.
Upper Fusing Roller
Rear

Upper Fusing Paper

Separator Finger

Front

◆ Lower Fusing Paper Separator Fingers

• The Lower Fusing Paper Separator Fingers are flat springs to enhance
paper separating performance and ensure that the paper would not be
wedged if a misfeed occurs.
• The Fusing Lower Guide/Lower Fusing Paper Separator Fingers Assy is
moved down as the Exit Unit is swung down, facilitating clearing of
misfeeds.

Fusing Lower Guide/Lower Fusing

Paper Separator Fingers Assy

Lower Fusing Paper

Separator Finger

Front

Set Spring

Rear Exit Unit

M-144
20-6. Fusing Temperature Control

<Overview>
• Fusing Front Thermistor TH1 and Fusing Rear Thermistor TH2 detect
changes in the surface temperature of the Upper Fusing Roller at its
front and rear ends. The Thermistors input the corresponding analog
voltages to pins 78 (TH1) and 77 (TH2) of IC1A on Master Board PWB-A
so that PWB-A can control the surface temperature of the Upper Fusing
Roller.
• TH1 is usually used to provide 200°C temperature control.
• TH2 is provided to monitor the temperature at the rear that could rise
when paper of a small size is fed through the copier.
• Both thermistors are located where paper of a small size does not move
past.

Fusing Rear Thermistor TH2

Rear

Fusing Front Thermistor TH1

Fusing Thermoswitch TS1 Front

1136M080AA

• To avoid a current surge when the copier is turned ON, Fusing Heater
Lamp H1 is turned ON with a time lag of 1 second after S1 has been
turned ON.
• To protect H1 from being repeatedly turned ON and OFF, it is kept ON
or OFF for a period of 1 second.
• While the copier is warming up, the Fusing Rollers are turned so that the
Lower Fusing Roller receives heat. This ensures good fusing
performance immediately after the warm-up.

Start Key Copy Cycle Energy Saver Energy Saver

S1 ON Predrive Start ON Completed ON OFF

200 C

180 C

175 C

Time
1Sec
1134M074CB
Warm-up Completed
2 minutes and
30 seconds of less

M-145
<Temperature Control When Small Size Paper is Fed Through>
• TH2 detects the surface temperature of the rear end of the Upper Fusing
Roller. When detecting a temperature of 225°C or more, TH2 comes into
play to provide the temperature control.
• If TH1 detects a temperature of 165°C or less, then TH1 is used, instead
of TH2, to provide the temperature control.
• H1 is turned ON and OFF under different temperatures detected by TH1
and TH2 as detailed below.

Temperature Detected by Temperature Detected by

H1 ON/OFF
TH1 TH2
Less than 200°C Less than 225°C ON
200°C or more Less than 225°C OFF
165°C or more 225°C or more OFF
Less than 165°C 225°C or more Turned OFF if currently ON
Turned ON if currently OFF

225 C

200 C

165 C
Control by TH2 with lower
Normal Control by TH1 temperature monitored by TH1

Start Key 1134M069CA

• The Table below shows the relationship between the analog voltage
applied to pins 77 and 78 (AN3 and 4) of IC1A on PWB-A and the Upper
Fusing Roller surface temperature.

Temperature Input Temperature Input Temperature Input

°C Voltage to °C Voltage to °C Voltage to
IC1A-77, 78 IC1A-77, 78 IC1A-77, 78
100 Approx. 3.21 150 Approx. 1.60 200 Approx. 0.65
110 Approx. 2.87 160 Approx. 1.35 210 Approx. 0.54
120 Approx. 2.53 170 Approx. 1.13 220 Approx. 0.46
130 Approx. 2.20 180 Approx. 0.94 225 Approx. 0.42
140 Approx. 1.89 190 Approx. 0.78

M-146
 • H1 has the following light distribution characteristic. That is, the intensity
at the rear of the Lamp is lower than the front end by about 30% to
prevent the temperature of the rear end of the Upper Fusing Roller from
increasing.

<Predrive>
• Predrive is performed at the following timing.

TH1 detects the surface temperature of the Upper Fusing Roller

immediately before H1 is turned ON.

If temperature is less than 165°C If temperature is 165°C or more

Predrive begins when the temperature detected by TH1 reaches 175°C,

provided that the Predrive Inhibit signal is LOW.

Predrive is completed in 30 Predrive is completed in 15

seconds and the copier becomes seconds and the copier becomes
ready to make copies when the ready to make copies when the
temperature detected by TH1 temperature detected by TH1
reaches 200°C.. reaches 200°C..

<Detection of Abnormally High Temperature>

• H1 is turned ON and OFF by the signal output from pin 16 (P51) of IC1A
on PWB-A. It is turned ON by a LOW signal and OFF by a HIGH signal.
• When TH1 detects an abnormally high temperature, the output from pin
7 of IC20A on PWB-A goes from LOW to HIGH. The Self Holding signal
goes LOW causing RY1C to turn OFF. This causes RY1 to turn OFF,
which cuts off power to H1, turning it OFF.

M-147
 1136C33M

M-148
21 EXIT UNIT
21-1. Construction

Left Door

Drive Gear

Paper Exit
Switch S53
Exit/Duplex Switching
Exit/Duplex Plate
Solenoid SL5

1st Paper Exit Roller

21-2. Exit Unit Drive Mechanism

Drive for the Exit Unit comes from the Fusing Unit by way of a gear train,
turning the 1st and 2nd Paper Exit Rollers.

Driven Roll

Driven Roll
2nd Paper Exit Roller
(in Fusing Unit)
Drive Gear

1st Paper Exit

Roller Drive Gear

Upper Fusing Roller

Drive Gear

M-149
21-3. Exit/Duplex Switching Mechanism/Control

<Switching Mechanism>
• The Exit/Duplex Switching Plate in the Exit Unit is operated to feed the
paper into Duplex Unit AD-5 when the copier is in the 2-sided copying
mode.

2nd Paper
Exit Roller

Exit/Duplex Exit/Duplex
Solenoid SL5 Switching Plate

<Switching Control>
• The Exit/Duplex Switching Plate is swung up and down when SL5 is
energized and deenergized by the signal output from pin85 of IC4A on
Master Board PWB-A.

• The plate is operated at the following timing.

(Multi-copy cycle for 2 copies)

L
TRON
H

Synchronizing Roller ON
Clutch CL2 OFF
Approx. 310msec. Approx. 1,540msec.
Exit/Duplex Solenoid ON
SL5 OFF

1134T258MCB

1136C34M

M-150
21-4. Paper Exit Detection
• Paper Exit Switch S53 detects a sheet of paper that is being fed out of the
copier. Instead of a photosensor, a reed switch is used for S53 for its
heat-resistance. The switch must be located near the Fusing Unit which
gets hot. When the paper moves the S53 actuator, the magnet fitted to the
actuator is pulled away from the reed switch and the switch contacts open.
This means that S53 is turned OFF.

( ON )

Reed Magnet
Magnet Paper Exit Switch
Switch S53

Driven Roll Contacts

Actuator
( OFF )
Reed Switch 2nd Paper
Exit Roller

• The S53 detection result is sent to Master Board PWB-A and the copier
knows that a sheet of paper has been fed out of the copier.

1136C35M

M-151
21-5. Detection of Left Upper Door in Position
• Left Upper Door Set Sensor PC41, fitted to the copier body, detects the
Left Upper Door when closed. The Exit Unit is fitted to the Left Upper Door.
• Left Upper Door Interlock Switch S23 is also installed just as with the Front
Door.
• When the Left Upper Door is closed, the rib on the Exit Unit pushes the
Lever, which activates/actuates PC41/S23.

Left Upper Door

Lever
Left Upper Door
Set Sensor PC41

2nd Paper Exit Roller

Left Upper Door Drive Gear
Interlock Switch S23

1136C36M

M-152
22 TOTAL COUNTER
22-1. Detection of Total Counter in Position
• This copier is designed to detect whether a Total Counter (CT1) is securely
connected. It ensures that the copier can keep track of its usage by
eliminating the possibility of a copy cycle being run without the Total
Counter. As shown in the circuit diagram below, the copier inhibits the
initiation of a new copy cycle if it continuously detects a Total Counter
disconnected for a 400-msec. period. At this time, the copier keeps the
Start Key blinking orange, warning the operator that the Total Counter is
not correctly connected.

22-2. CT1 Count-Up

• The signal from IC1A on Master Board PWB-A turns ON Transistors Q1A
and Q13A under the following conditions, which results in CT1 counting up.
See the circuit diagram below.
* The trailing edge of the copy moves past Paper Exit Switch S53.
* The trailing edge of the copy moves past the Sorter Exit Sensor of the
Sorter if the copier is equipped with a Sorter.
* When a copy is to be stored in the Duplex Unit in a 2-sided copying
mode, the trailing edge of the copy moves past the Duplex Paper Entry
Sensor of the Duplex Unit.

1136C37M

M-153
23 POWER SUPPLY
The copier power is supplied as follows when the power cord is plugged in
or Power Switch S1 turned ON.

1. When Power Cord is Plugged in.

Power Cord: Plugged in.

DC Power Supply Unit (PU1): ON

DC24V: Output

Power Supply Board Main Relay (RY1): OFF

(PWB-C)
AC Power is not supplied.

RY2C: OFF RY3: OFF RY1C: OFF

RY3C: OFF
RY4C: OFF
∗1 ∗1

Drum Paper DC24V is not

Dehumidifying Dehumidifying supplied
Heater (H3): Heater (H2): (Including Options)
ON ON

DC5V REM: L (SIC: A)

RY1C: Normally-open
∗2 RY2C: Normally-closed
RY3C: Normally-open
DC5V is not supplied RY4C: Normally-open
RY3: Normally-closed

∗1: When Drum Dehumidifying Switch (S3) and Paper Dehumidifying Switch
(S12) are OFF, DC24V is not supplied to H2 and H3.
∗2: When S1 on Power Supply Board (PWB-C) is set to "A", the DC5V REM
signal which is input to PU1 is L . Therefore DC5V is not supplied.

M-154
2. Power Switch (S1) is turned ON.

Power Switch (S1) ON

Power Supply Board (PWB-C) RY3: ON

RY1C: ON

Paper Dehumidifying
Heater (H2): OFF

DC5V REM H : Output RY2C: ON Power ON Signal L : Output

DC5V from PU1: Output Drum Dry RY1C: Normally-open

Heater (H3): RY2C: Normally-closed
OFF RY3C: Normally-open
DC5V: Supplied RY4C: Normally-open
RY1: Normally-closed
RY3: Normally-open
Master Board (PWB-A)

RY1 REM L : Output Option REM L : Output DC5V is converted to

DC4.7V by VR1 and
ZD1A on Master
RY1: ON RY3C: ON
Board (PWB-A)
RY4C: ON

DC24V is AC Power is DC24C is supplied to DC4.7V is Supplied

supplied from supplied to Options
Power Supply Heater Lamp
Board etc.

Master Board (PWB-A)

DC24V is converted to DC12V by

IC6A on Master Board (PWB-A)

DC12V is supplied.

M-155
M-156
 1136C0RM

M-157
24 MEMORY BACKUP
IC1 (RAM) of RAM Board PWB-R connected to Master Board PWB-A stores
the setting/adjustment values set in the Tech. Rep. modes as well as the
counter counts. Backup Battery BAT1 is mounted on PWB-R to prevent the
contents of memory from being lost when the power cord is unplugged or
PWB-R removed from the copier. BAT1 requires a voltage of 2 V or more to
retain the contents of memory.
Important
As noted above, the RAM stores critical data. If PWB-R has been
replaced with a new one, memory must first be cleared and then all
settings be made again. It should also be noted that PWB-R should not be
replaced at the same time when PWB-A is replaced.

1136C38M

M-158
EP3050/EP4050

DIS/REASSEMBLY,
ADJUSTMENT
 CONTENTS
1 SERVICE INSTRUCTIONS
1-1. PRECAUTIONS FOR DISASSEMBLY/ADJUSTMENTS . . . D-1
1-2. INSTRUCTIONS FOR HANDLING THE PWBs WITH
MOS ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2
1-3. HANDLING OF THE PC DRUM . . . . . . . . . . . . . . . . . . . . . . . D-2
1-4. PARTS WHICH MUST NOT BE TOUCHED . . . . . . . . . . . . . D-4

2 DISASSEMBLY/REASSEMBLY
2-1. DOORS, COVERS, AND EXTERIOR PARTS:
IDENTIFICATION AND REMOVAL PROCEDURES . . . . . . . D-5
2-2. REMOVAL OF CIRCUIT BOARDS . . . . . . . . . . . . . . . . . . . . . D-7
2-3. PAPER TAKE-UP/TRANSPORT SECTIONS . . . . . . . . . . . . D-9
(1) Removal of the Paper Take-Up Unit . . . . . . . . . . . . . . . . . D-9
(2) Removal of the Paper Take-Up Roll/Feed Roll Assy and
Separator Roll Assy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-11
(3) Cleaning of the Paper Take-Up Roll, Feed Roll,
and Separator Roll . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-14
(4) Cleaning of the Vertical Transport Rollers . . . . . . . . . . . . D-15
(5) Removal of the Drawers . . . . . . . . . . . . . . . . . . . . . . . . . . . D-15
(6) Removal of the Upper Synchronizing Roller . . . . . . . . . . . D-17
(7) Cleaning of the Upper and Lower Synchronizing
Rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-18
(8) Replacement of the Paper Dust Remover . . . . . . . . . . . . D-18
(9) Cleaning of the Paper Dust Remover . . . . . . . . . . . . . . . . D-19
(10) Removal of the Suction Unit. . . . . . . . . . . . . . . . . . . . . . . D-20
(11) Disassembly of the Suction Unit . . . . . . . . . . . . . . . . . . . D-21
(12) Disassembly of the Multi Bypass Unit . . . . . . . . . . . . . . . D-22
2-4. OPTICAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-26
(1) Cleaning of the Original Glass . . . . . . . . . . . . . . . . . . . . . . D-26
(2) Cleaning of the Scanner Shaft . . . . . . . . . . . . . . . . . . . . . . D-26
(3) Cleaning of the Scanner Rail . . . . . . . . . . . . . . . . . . . . . . D-26
(4) Removal of the Scanner . . . . . . . . . . . . . . . . . . . . . . . . . . . D-27
(5) Cleaning of the Exposure Lamp. . . . . . . . . . . . . . . . . . . . . D-27
(6) Removal of the Thermal Fuse . . . . . . . . . . . . . . . . . . . . . . D-28
(7) Cleaning of the 1st, 2nd, and 3rd Mirrors . . . . . . . . . . . . . D-28
(8) Cleaning of the Lens and 4th and 5th Mirrors. . . . . . . . . . D-29
(9) Winding of the Lens Drive Cable . . . . . . . . . . . . . . . . . . . . D-30
(10) Removal of Scanner Motor M2 . . . . . . . . . . . . . . . . . . . . D-32
(11) Winding of the Scanner Drive Cable . . . . . . . . . . . . . . . . D-34

i
 CONTENTS
(12) Removal of the Scanner Drive Cable . . . . . . . . . . . . . . . D-35
(13) Cleaning of the 6th Mirror Protective Filter . . . . . . . . . . . D-36
(14) Cleaning of the Cooling Fan Filter . . . . . . . . . . . . . . . . . . D-37
2-5. PC UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-38
(1) Removal of the PC Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . D-38
(2) Disassembly of the PC Unit . . . . . . . . . . . . . . . . . . . . . . . . D-38
(3) Replacement of the PC Drum . . . . . . . . . . . . . . . . . . . . . . D-42
(4) Cleaning of the Developer Scattering Prevention Plate. . D-42
(5) Cleaning of the Ds Positioning Collars . . . . . . . . . . . . . . . D-42
(6) Cleaning of the Toner Antispill Trap . . . . . . . . . . . . . . . . . D-42
(7) Cleaning of the Cleaning Blade . . . . . . . . . . . . . . . . . . . . . D-42
(8) Replacement of the Cleaning Blade . . . . . . . . . . . . . . . . . D-43
(9) Replacement of the Starter . . . . . . . . . . . . . . . . . . . . . . . . D-45
(10) Cleaning of the AIDC Sensor . . . . . . . . . . . . . . . . . . . . . . D-46
(11) Cleaning of the PC Drum Paper Separator Fingers . . . . D-46
(12) Replacement and Cleaning of the Toner Antispill Seal
and Cleaning of the Toner Antispill Plate . . . . . . . . . . . . D-46
(13) Removal of Main Erase Lamp LA3 . . . . . . . . . . . . . . . . . D-47
(14) Cleaning of the Main Erase Lamp Filter . . . . . . . . . . . . . D-47
(15) Cleaning of Image Erase Lamp LA2 . . . . . . . . . . . . . . . . D-47
(16) Replacement of Image Erase Lamp LA2 . . . . . . . . . . . . D-47
(17) Removal of the Ozone Filter
(PC Drum Charge Corona). . . . . . . . . . . . . . . . . . . . . . . . D-48
(18) Removal of the Ozone Filter
(Image Transfer/Paper Separator Coronas) . . . . . . . . . . D-48
(19) Removal of the Toner Collecting Box . . . . . . . . . . . . . . . D-48
2-6. PC DRUM CHARGE CORONA AND
IMAGE TRANSFER/PAPER SEPARATOR CORONAS . . . . D-49
(1) Removal of the PC Drum Charge Corona. . . . . . . . . . . . . D-49
(2) Replacement of the PC Drum Charge Corona
Wire Assy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-49
(3) Cleaning of the PC Drum Charge Corona Wire . . . . . . . . D-51
(4) Cleaning of the PC Drum Charge Corona Grid Mesh . . . D-52
(5) Cleaning of the PC Drum Charge Corona Housing . . . . . D-52
(6) Removal of the Image Transfer/Paper Separator
Coronas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-52
(7) Cleaning and Replacement of the Image Transfer
Corona Wire. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-52

ii
 CONTENTS
(8) Cleaning and Replacement of the Paper Separator
Corona Wire. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-53
(9) Cleaning of the Image Transfer/Paper Separator
Coronas Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-54
(10) Cleaning of the Lower Pre-Image Transfer
Guide Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-54
2-7. FUSING UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-55
(1) Removal of the Fusing Unit . . . . . . . . . . . . . . . . . . . . . . . . D-55
(2) Disassembly of the Fusing Unit . . . . . . . . . . . . . . . . . . . . . D-55
(3) Replacement and Cleaning of the Upper Fusing Paper
Separator Fingers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-60
(4) Cleaning of the Lower Fusing Paper Separator Fingers . D-60
(5) Cleaning of the Fusing Unit Entrance Guide Plate. . . . . . D-60
(6) Cleaning of Fusing Front and Rear Thermistors TH1/2 . . D-60
(7) Cleaning of Fusing Thermoswitch TS1 . . . . . . . . . . . . . . . D-61
(8) Replacement and Cleaning of the Cleaning Roller . . . . . D-61
(9) Replacement and Cleaning of the Upper Fusing
Roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-61
(10) Replacement and Cleaning of the Lower Fusing
Roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-62
2-8. EXIT UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-63
(1) Removal of the Exit/Duplex Switching Unit . . . . . . . . . . . . D-63

3 ADJUSTMENT
3-1. JIGS AND TOOLS USED . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-64
3-2. ADJUSTMENT REQUIREMENTS LIST . . . . . . . . . . . . . . . . . D-65
3-3. ADJUSTMENT OF SWITCHES . . . . . . . . . . . . . . . . . . . . . . . D-66
Adjustment of Front Door Interlock Switch S21 . . . . . . . . . . . D-67
3-4. ADJUSTMENT OF BELT TENSION . . . . . . . . . . . . . . . . . . . . D-68
(1) Paper Take-Up Unit Timing Belt . . . . . . . . . . . . . . . . . . . . D-68
(2) Developing Unit Timing Belt . . . . . . . . . . . . . . . . . . . . . . . . D-68
(3) Fusing Unit Timing Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . D-68
(4) PC Unit Timing Belt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-68
3-5. ACCESSING THE TECH. REP. MODE AND
ADJUST MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-69
3-6. ELECTRICAL/IMAGE ADJUSTMENTS . . . . . . . . . . . . . . . . . D-70
(1) Initial Adjustment of Original Size Detecting Board . . . . . D-70
(2) ATDC Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-71
(3) Adjustment of the Aperture Plates . . . . . . . . . . . . . . . . . . . D-73

iii
 CONTENTS
(4) Adjustment of Exposure Level in the Auto
Exposure Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-74

(5) Adjustment of Optimum Exposure Setting in the Manual

Exposure Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-75
(6) Adjustment of Zoom Ratio in the Crosswise Direction . . . D-77
(7) Adjustment of Zoom Ratio in the Feeding Direction. . . . . D-79
(8) Adjustment of Reference Position of the Multi
Bypass Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-81
(9) Adjustment of Reference Position of the 1st/2nd
Drawer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-82
(10) Adjustment of the Leading Edge Registration . . . . . . . . D-83
(1) Leading Edge Registration in Full Size Mode. . . . . . D-83
(2) Leading Edge Registration in Enlargement Mode . . D-85
(3) Leading Edge Registration in Reduction Mode . . . . D-87
(11) Adjustment of the Leading Edge Registration for Book
Second Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-89
(12) Adjustment of the Image Leading Edge Erase Width . . D-91
(13) Adjustment of the Image Trailing Edge Erase Width . . . D-93
(14) Adjustment of Edge Erase . . . . . . . . . . . . . . . . . . . . . . . . D-95
3-7. OTHER ADJUSTMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-96
(1) Focus-Positioning of the Scanner and Mirrors
Carriage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-96
(2) Adjustment of the Gap Between the Doctor Blade and
Sleeve Roller (D.B. Adjustment) . . . . . . . . . . . . . . . . . . . . D-98
(3) Adjustment of the PC Drum Paper Separator Finger
Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-99
(4) Adjustment of Manual Feed Paper Take-Up Solenoid
SL4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-100
(5) Adjustment of Exit/Duplex Solenoid SL5. . . . . . . . . . . . . . D-101

4 MISCELLANEOUS
4-1. INSTALLATION OF THE PLUG-IN COUNTER (OPTION)
MOUNTING BRACKET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-102
4-2. ADJUSTMENT OF THE RIGHT DOOR . . . . . . . . . . . . . . . . . D-103

iv
 1 SERVICE INSTRUCTIONS
1-1. PRECAUTIONS FOR DISASSEMBLY/ADJUSTMENTS
Observe the following precautions whenever servicing the copier.

• Be sure to unplug the copier from the outlet before attempting to service the copier.
• The basic rule is not to operate the copier anytime during disassembly.
If it is absolutely necessary to run the copier with its covers removed, use care not to allow your
clothing to be caught in revolving parts such as the Timing Belt and gears.
• Be sure to use the Interlock Switch Actuating Jig whenever it is necessary to actuate the Interlock
Switch with the covers left open or removed.
• Do not plug in or unplug print jacks on the Board or connect or disconnect the Board connectors
while power is being supplied to the copier.
• Do not use flammable spray around the copier in operation.
• The Magnet Roller of the Imaging Unit generates strong magnetic force. Do not bring it near a
cathode-ray tube or watch.
• A used lithium cell should be disposed of according to the local regulations and never be
discarded casually or left unattended at the user’s premises.
• Do not use an air gun or vacuum cleaner for cleaning the ATDC Sensor and other sensors, as
they can cause electrostatic destruction. Use a blower brush and cloth. If a unit containing these
sensors is to be cleaned, first remove the sensors from the unit.
• When handling the PWBs with MOS ICs, observe "1-2. Instructions for Handling the PWBs with
MOS ICs."
• When handling the PC Drum, observe precautions given in "1-3. Handling of the PC Drum."
• Note that replacement of a PWB may call for readjustments or resetting of particular items.
• Use the right screw in the right place at reassembly. Note that some are longer and some are
thicker than others.
• A toothed washer is used with the screw that secures the ground wire to ensure positive
conduction. Do not forget to insert this washer at reassembly.
• To reassemble the copier, reverse the order of disassembly unless otherwise specified.
• If it becomes necessary to replace the thermal fuse or any other fuse mounted on a board, be sure
to use one of the rating marked on the blown fuse. Always note the rating marked on the fuse, as
the rating and mounting site or number used are subject to change without notice.
• Do not pull out the Toner Hopper while the Toner Bottle is turning, as a damaged Toner
Replenishing Motor or locking mechanism could result. If the copier is to be run with the Front
Door swung down, make sure that the Toner Hopper is in the locked position.

CAUTION: DANGER OF EXPLOSION IF BATTERY IS INCORRECTLY REPLACED. REPLACE

ONLY WITH THE SAME OR EQUIVALENT TYPE RECOMMENDED BY THE MANUFACTURER.
DISCARD USED BATTERIES ACCORDING TO THE MANUFACTURER’S INSTRUCTIONS.

ADVARSEL!: Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering. Udskiftning må kun ske

med batteri af samme fabrikat og type. Levér det brugte batteri tilbage til leverandøren.

D-1
1-2. INSTRUCTIONS FOR HANDLING THE PWBs WITH MOS ICs
The following precautions must be observed when handling P.W. Boards with MOS (Metal
Oxide Semiconductor) ICs.

During Transportation/Storage:
• During transportation or when in storage, new P.W. Boards must not be indiscriminately removed
from their protective conductive bags.
• Do not store or place P.W. Boards in a location exposed to direct sunlight.
• When it becomes absolutely necessary to remove a Board from its conductive bag or case,
always place it on its conductive mat in an area as free as possible from static electricity.
• Do not touch the pins of the ICs with your bare hands.
During Replacement:
• Before unplugging connectors from the P.W. Boards, make sure that the power cord has been
unplugged from the outlet.
• When removing a Board from its conductive bag or conductive case, do not touch the pins of the
ICs or the printed pattern. Place it in position by holding only the edges of the Board.
• Before plugging connectors into the Board, make sure that the power cord has been unplugged
from the power outlet.
During Inspection:
• Avoid checking the IC directly with a multimeter; use connectors on the Board.
• Never create a closed circuit across IC pins with a metal tool.
• When it is absolutely necessary to touch the ICs and other electrical components on the Board, be
sure to ground your body.

1-3. HANDLING OF THE PC DRUM

During Transportation/Storage:
• Use the specified carton whenever moving or storing the PC Drum.
• The storage temperature is in the range between −20°C and 40°C.
• In summer, avoid leaving the PC Drum in a car for a long time.
Handling:
• Ensure that the correct PC Drum is used.
• Whenever the PC Drum has been removed from the copier, store it in its Container or protect it
with a Drum Cloth.
• The PC Drum exhibits greatest light fatigue after being exposed to strong light over an extended
period of time. Never, therefore, expose it to direct sunlight.
• Use care not to contaminate the surface of the PC Drum with oilbase solvent, fingerprints, and
other foreign matter.
• Do not scratch the surface of the PC Drum.
• Do not apply chemicals to the surface of the PC Drum.
• Do not attempt to wipe clean the surface of the PC Drum unless its surface is contaminated with
fingerprints.

D-2
 If the surface is contaminated with fingerprints, clean it using the following procedure.

1. Place the PC Drum into one half its container.

2. Gently wipe the residual toner off the surface of the

PC Drum with a dry, dust-free cotton pad.
a) Rotate the PC Drum so that the area of its surface
on which the line of toner left by the Cleaning Blade
is present is facing staright up. Wipe the surface in
one continuous movement from the rear edge of the
PC Drum to the front edge and off the surface of the
PC Drum.
b) Rotate the PC Drum slightly and wipe the newly
exposed surface area with a clean face of the
dust-free cotton pad. Repeat this procedure until
the entire surface of the PC Drum has been
thoroughly cleaned.
* Always use a clean face of the dry dust-free cotton
pad until no toner is evident on the face of the pad
after wiping.

3. Soak a small amount of either ethyl alcohol or

isopropyl alcohol into a clean, unused dust-free cotton
pad which is folded over into quarters. Now, wipe the
surface of the PC Drum in one continuous movement
from its rear edge to its front edge and off its surface
one to two times.
* Never move the pad back and forth.

4. Using the same face of the pad, repeat the procedure

explained in the latter half of step 3 until the entire
surface of the PC Drum is wiped. Always overlap the
areas when wiping. Two complete turns of the PC
Drum would be appropriate for cleaning.

NOTES
• The Organic Photoconductor Drum is softer than CdS and Selenium Drums and is therefore
susceptible to scratches.
• Even when the PC Drum is only locally dirtied, wipe the entire surface.
• Do not expose the PC Drum to direct sunlight. Clean it as quickly as possible even under
interior illumination.
• If dirt remains after cleaning, repeat the entire procedure from the beginning one more time.

D-3
1-4. PARTS WHICH MUST NOT BE TOUCHED
(1) Red Painted Screws
Purpose of Application of Red Paint
Red painted screws indicate an assembly or unit can only be adjusted or set at the factory and
shall not be readjusted, set, or removed in the field. Note that when two or more screws are
used on the part in question, only one representative screw may be marked with red paint.

(2) Variable Resistors on Board

Do not turn the variable resistors (potentiometers) on boards to which no adjusting instructions
are given in "ADJUSTMENT".

(3) Other Screws

Although not marked with red paint, the following screws must not be loosened or readjusted.

One screw on the Scanner

Roller Height Adjusting Plate Three screws on Scanner Rail

Two screws on the Lower

Two screws on the Lens Rail
Pre-Image Transfer Guide Plate

Two screws on the Mirror Motor

Unit

D-4
2 DISASSEMBLY/REASSEMBLY
2-1. DOORS, COVERS, AND EXTERIOR PARTS: IDENTIFICATION AND
REMOVAL PROCEDURES

5 7
4
3
8
2

10
13
12
11

D-5
No. Part Name Removal Procedure
Swing down the Front Door. ➡ Remove two Front Door
1 Front Door hinge shafts. ➡ Remove one belt mounting screw inside
the Front Door.
Raise the Original Cover. ➡ Swing down the Front Door.
➡ Remove the Right Door (Manual Bypass Unit). ➡
Remove the Right Cover. ➡ Open the Left Door
2 Control Panel
(Exit/Duplex Switching Unit). ➡ Remove the Upper Left
Cover. ➡ Remove four control panel mounting screws. ➡
Unplug three connectors from PWB-B.
3 Original Width Scale Raise the Original Cover. ➡ Remove two scale mounting
screws.
4 Original Glass Note: When the Original Width Scale has been removed,
use care not to lose two springs.

Remove the Original Cover. ➡ Remove the screw cover

5 Rear Upper Cover (small)
and one Rear Upper Cover (small) mounting screw.
Remove the Original Cover. ➡ Remove one Left Hinge
6 Left Hinge Cover
Cover mounting screw.
Remove the Original Cover. ➡ Remove the Right and
Left Hinge Covers. ➡ Remove the Rear Upper Cover
7 Rear Upper Cover (small). ➡ Remove the Right Door. ➡ Remove the Right
Cover. ➡ Remove one Rear Upper Cover mounting
screw.
Remove the Original Cover. ➡ Remove one Right Hinge
8 Right Hinge Cover
Cover mounting screw.
Remove the Right Door. ➡ Remove four Right Cover
9 Right Cover
mounting screws.
Open the Right Door. ➡ Remove the harness from one
Right Door
10 wiring saddle. ➡ Unplug three connectors. ➡ Remove
(Manual Bypass Unit)
two Right Door mounting screws.
Snap off the Counter Cover. (It is secured by catches at
11 Counter Cover
two places.)
12 2nd Drawer Slide out the drawer and remove one stopper mounting
13 1st Drawer screw on the right.

14 Original Cover Pull the Original Cover straight up.

Open the Left Door. ➡ Remove six Upper Left Cover
15 Upper Left Cover
mounting screws.
Left Door (Exit/Duplex
16 See p. D-67.
Switching Unit)
Remove the Upper Left Cover. ➡ Remove two Middle
17 Middle Left Cover
Left Cover mounting screws.
18 Rear Cover Remove six Rear Cover mounting screws.

D-6
2-2. REMOVAL OF CIRCUIT BOARDS
• When removing circuit board, refer to "PRECAUTIONS FOR HANDLING THE PWBs"
contained in SWITCHES ON PWBs and follow the corresponding removal procedures given on
the next page.
• Replacement of a circuit board may call for readjustments or resetting of particular items.
• The removal procedures given on the next page omit the removal of connectors and screws
securing the circuit-board support or circuit board.
• Where it is absolutely necessary to touch the ICs and other electrical components on the
board, be sure to ground your body.

PU2 UN2 PWB-A

PWB-H PWB-C

PWB-R

UN-1
PWB-J

PWB-B

HV1
PWB-I
PU1
PWB-D

PWB-F

UN4
UN3

◆Readjustments/Resetting Involved in Replacement of PWB-R, UN2, UN3, and UN4

• When PWB-R (RAM Board) is replaced:

Carry out Memory Clear and then make the Tech. Rep. Choice, User’s Choice, and Adjust
settings again.
• When UN2 is replaced:
Make the initial adjustment of the Original Size Detecting Board. (See p. D-??.)
• When UN3 is replaced:
Adjust the exposure level in the Auto Exposure mode. (See p. D-??.)
• When UN4 is replaced:
Discard the developer which had been used until UN4 was replaced, charge the Developing
Unit with fresh starter, and adjust ATDC. (See p. D-??.)

D-7
Symbol Name Removal Procedure
PWB-A Master Board Remove the Rear Cover. ➡ Remove PWB-A.
Swing down the Front Door. ➡ Remove the Circuit
PWB-B MSC Board
Board Cover. ➡ Remove PWB-B.
Remove the Rear Cover. ➡ Remove PWB-A Mounting
PWB-C Power Supply Board
Bracket Assy. ➡ Remove PWB-C.
Remove the Rear Cover. ➡ Remove the PWB-A
Mounting Bracket Assy. ➡ Remove the Power Supply
PWB-D Noise Filter Board
Unit Cover. ➡ Remove the DC Power Supply Unit. ➡
Remove PWB-D.
Remove the Original Width Scale. ➡ Remove the
PWB-H AE Sensor Board
Original Glass. ➡ Remove PWB-H.
Tech. Rep. Setting Switches Swing down the Front Door. ➡ Remove the Circuit
PWB-I
Board Board Cover. ➡ Remove PWB-I.
PWB-J SCP Board Remove the Right Cover. ➡ Remove PWB-J.
PWB-R RAM Board Remove the Rear Cover. ➡ Remove PWB-R.
Swing down the Front Door. ➡ Remove the Control
UN1 Control Panel
Panel.
Original Size Detecting
UN2 Remove the Rear Cover ➡ Remove UN2.
Board
Swing down the Front Door. ➡ Remove the PC Unit. ➡
Remove the PC Drum Charge Corona. ➡ Remove the
UN3 AIDC Sensor
PC Drum. ➡ Remove the PC Drum Paper Separator
Finger Holder Assy. ➡ Remove the AIDC Sensor.
Swing down the Front Door. ➡ Remove the PC Unit. ➡
UN4 ATDC Sensor
Remove the ATDC Sensor.
Remove the Rear Cover. ➡ Remove the PWB-A
PU1 DC Power Supply Unit Mounting Bracket Assy. ➡ Remove the Power Supply
Unit Cover. ➡ Remove PU1.
Remove the Rear Cover. ➡ Remove the PWB-A
PU2 Power Supply Unit Mounting Bracket Assy. ➡ Remove the AFR Connector
Unit. ➡ Remove PU2.
Remove the Rear Cover. ➡ Remove the HV1 Cover. ➡
HV1 High Voltage Unit
Remove HV1.

D-8
2-3. PAPER TAKE-UP/TRANSPORT SECTIONS

(1) Removal of the Paper Take-Up Unit

1. Remove the Right Door, Right Cover, and Rear Cover.
2. Remove the 1st and 2nd Drawers. (For the removal of the 1st and 2nd Drawers, see p. D-15.)
3. Remove four locking wiring saddles.
4. Unplug three connectors from S/P Board PWB-F.
5. Disconnect the hookup connector.

6. Remove two screws each to free 1st Drawer Paper

Take-Up Motor M11 and 2nd Drawer Paper Take-Up
Motor M12.
∗ For ease of understanding, the illustration shows
where the connectors and Paper Take-Up Motors
are removed.

7. Remove two screws and the Paper Guide Plate.

D-9
 8. Remove two edge covers with locks.
9. Unplug three hookup connectors.

10. Pull the harness out to the front from the rear frame.

11. Remove four screws and the Paper Take-Up Unit.

D-10
(2) Removal of the Paper Take-Up Roll/Feed Roll Assy and Separator
Roll Assy
1. Remove the Right Door, Right Cover, and Rear Cover.
2. Remove two screws and the Paper Guide Plate from each drawer.

3. Unhook the front and rear springs from the copier frame. Remove the Paper Separator Roll/Paper
Guide Plate Assy by turning it about 90° in the direction of the arrow.

D-11
 4. Remove one screw and the Paper Separator Roll
Assy Mounting Bracket from each drawer. (The
illustration shows how the Paper Separator Roll Assy
is removed from the 2nd Drawer.)

5. Disassemble the Paper Separator Roll Assy.

Unless it is absolutely
necessary, do not remove
the screws that secure the
Separating Pressure
Adjusting Plate (A).

D-12
6. Remove two C-clips from each Paper Take-Up
Roll/Feed Roll Assy. (The illustration is for the Paper
Take-Up Roll/Feed Roll Assy for the 2nd Drawer.)

7. Remove the bushing from the front end of each Paper

Take-Up Roll/Feed Roll Assy.
8. Remove the rear bushing from the holder.

9. Move the coupling holder of each Paper Take-Up

Roll/Feed Roll Assy in the direction of the arrow to
work it off the pin of the copier. This allows the Paper
Take-Up Roll/Feed Roll Assy to come out of the copier.

NOTE
When reinstalling the Paper Take-Up Roll/Feed Roll
Assy, place it above the Pressure Release Lever.

D-13
10. Disassemble the Paper Take-Up Roll/Feed Roll Assy.

∗ Keep the lock pin for later use.

(3) Cleaning of the Paper Take-Up Roll, Feed Roll, and Separator Roll
1. Remove each Paper Take-Up Roll/Feed Roll Assy.
2. Remove each Paper Separator Roll Assy.
3. Using a soft cloth dampened with alcohol, wipe each roll clean of dirt.

Cleaning the Paper Take-Up Roll/Feed Roll Cleaning the Paper Separator Roll

D-14
(4) Cleaning of the Vertical Transport Rollers
1. Remove the Right Door, Right Cover, and Rear Cover.
2. Using a soft cloth dampened with alcohol, wipe each
roller clean of dirt.

(5) Removal of the Drawers

∗ Though the following steps and illustrations are for the 1st Drawer, the same procedure applies
also to the 2nd Drawer.

<Metric Areas>
1. Slide out the drawer and remove one screw and the
right stopper.

2. Remove one screw and the left stopper.

3. Remove the drawer from the copier.

D-15
<Inch Areas>

1. Turn ON Power Switch S1.

2. Press the Paper Descent Key and then slide out the
drawer.

1134O108CA

3. As with the metric areas, remove the right and left

stoppers.
4. Remove one screw and the hookup connector cover.

5. Remove one screw and the hookup connector

mounting bracket.

6. Unplug the hookup connector. Remove the drawer.

D-16
(6) Removal of the Upper Synchronizing Roller
1. Remove the Rear Cover.
2. Unplug the bias terminal from High Voltage Unit HV1.
3. Unplug CN1 of HV1.

4. Remove two screws and open HV1.

5. Snap off one E-ring to free Synchronizing Roller

Clutch CL2.

6. Snap off the E-ring and remove the bushing from the
Rear
rear end of the Upper Synchronizing Roller.

7. Swing down the Front Door and slide out the PC Unit.
8. Snap off the E-ring and remove the bushing from the
front end of the Upper Synchronizing Roller.

Front

D-17
 9. Remove the Upper Synchronizing Roller.

(7) Cleaning of the Upper and Lower Synchronizing Rollers

1. Swing down the Front Door and slide out the PC Unit.
2. Using a brush or a soft cloth dampened with alcohol,
clean the Upper Synchronizing Roller.

3. Swing down the Transport Section Release Lever.

4. Using a brush or a soft cloth dampened with alcohol,
clean the Lower Synchronizing Roller.

(8) Replacement of the Paper Dust Remover

1. Swing down the Front Door and slide out the PC Unit.
2. Loosen the screw that secures the Paper Dust
Remover Assy at the rear of the copier.
3. Remove the screw that secures the Paper Dust
Rear Remover Assy at the front of the copier.
4. Remove and replace the Paper Dust Remover Assy.

5. When only the Paper Dust Remover is to be replaced,

affix the new one along the reference line as shown
on the left.

D-18
(9) Cleaning of the Paper Dust Remover
1. Remove the Paper Dust Remover Assy.
2. Using a brush, whisk dust off the Paper Dust Remover.

D-19
(10) Removal of the Suction Unit
1. Remove the 1st and 2nd Drawers.
2. Swing down the Front Door and slide out the PC Unit.
3. Remove the Paper Dust Remover Assy.
4. Remove the Fusing Unit.

5. Remove the motor cover.

6. Unplug three connectors from the lower end of the

Suction Unit.

7. Swing the Transport Section Release Lever back to its

original position.
8. Pressing down the Image Transfer/Paper Separator
Coronas Unit, pull it out of the copier.

D-20
 9. Swing down the Transport Section Release Lever.
10. Holding up the Suction Unit, remove the compression
coil.

11. Remove the Suction Unit by sliding it to the right.

NOTE
When removing and reinstalling the Suction Unit, use
care not to bend the ground plate located on the right
in the rear.

NOTE
When reinstalling the Suction Unit, make sure that
two positioning pins on the copier fit into the
positioning holes in the Suction Unit.

(11) Disassembly of the Suction Unit

1. Remove the Suction Unit.
2. Remove two screws and the duct.
3. Remove four screws and the Suction Drive Unit.
NOTE
When reinstalling the Suction Drive Unit, try to press
it down against the Suction Base Plate.

4. Remove three driven rolls.

D-21
 5. Remove three Suction Belts.

6. Remove the Suction Roller as shown on the left.

(12) Disassembly of the Multi Bypass Unit

1. Open the Right Door.
2. Remove the harness from one locking wiring saddle.
3. Unplug three connectors.

4. Remove two screws and the Right Door.

NOTE
The Right Door must be adjusted for correct position
when it is reinstalled. (See p. D-103.)

5. Remove four screws and the Separator Guide Plate

Assy.

D-22
 6. Remove the compression coil.

NOTE
When reinstalling the compression coil, place it so
that its close-coiled end faces the Separator Unit.

Close-Coiled End

Mylar 7. Remove one C-clip and the Separator Assy.

NOTE
When removing the C-clip, use care not to bend the
mylar.

8. Remove one C-clip and the Separator Roll Assy.

9. Remove the harness from the edge cover and cord

clamp.

10. Remove four screws and the Solenoid Mounting

Bracket.

NOTE
When the solenoid has been replaced or the solenoid
mounting screws removed, be sure to adjust the
position of the solenoid. (For the adjustment
procedure, see p. D-100.)

D-23
 11. Remove two set screws and the electromagnetic
spring clutch.

NOTES
• When reinstalling the electromagnetic spring clutch,
orient the Paper Take-Up Roll shaft and the clutch
as shown on the left.
• The end of the clutch must be flush with or slightly
recessed (up to 1 mm) from the end face of the
Paper Take-Up Roll shaft. (The roll shaft should
never protrude.)
• There must be a gap of 1 mm or more at A when
the Paper Take-Up Roll shaft is pushed in the
direction of the arrow.

0 to
−1 mm
A

12. Snap off two C-clips and remove the Paper Take-Up
Roll Assy.

13. Snap off three C-clips and remove the Feed Roll.

D-24
 14. Snap off the C-clip and remove the Paper Take-Up
Roll.

• Cleaning of the Manual Bypass Paper Take-Up Roll

Using a soft cloth dampened with alcohol, clean the
Paper Take-Up Roll.

• Cleaning of the Manual Bypass Feed Roll

Using a soft cloth dampened with alcohol, clean the
Feed Roll.

• Cleaning of the Manual Bypass Separator Roll

Using a soft cloth dampened with alcohol, clean the
Separator Roll.

D-25
2-4. OPTICAL SECTION

(1) Cleaning of the Original Glass

Wipe clean the Original Glass with a soft cloth.

NOTE
The surface of the Original Glass is coated with
conductive material. Do not use a wax-based
detergent.
An alcohol-dampened cloth may be used if the glass
is seriously contaminated.

(2) Cleaning of the Scanner Shaft

1. Remove the Original Width Scale.
2. Remove the Original Glass.

3. Wipe clean the Scanner Shaft (in the rear of the

copier) with a soft cloth.

(3) Cleaning of the Scanner Rail

Wipe clean the Scanner Rail (at the front of the copier)
with a soft cloth.

D-26
(4) Removal of the Scanner
1. Work a screwdriver through the hole in the frame at
the left front side of the copier and remove the screw
that secures the Scanner.

2. Move the Scanner to the right-hand side of the copier.

Remove three screws to free the Scanner.

NOTE
Hold the Scanner at a point near the Scanner Shaft
when moving it.
To remove the Scanner, turn it counterclockwise.

3. Remove one screw and the wire guide.

4. Remove one screw and the ground wire.

5. Unplug the Exposure Lamp terminal connector.

6. Unplug the Thermal Fuse terminal connector.
7. Remove the Scanner from the copier.

(5) Cleaning of the Exposure Lamp

1. Remove one screw and the Exposure Lamp terminal.
2. Slide out the Exposure Lamp.

NOTE
When the Exposure Lamp has been cleaned or
replaced, be sure to make the "adjustment of
exposure level in the Auto Exposure mode." (See p.
D-74.)

D-27
 3. Using a soft cloth dampened with alcohol, clean the
lamp by gently wiping its surface in one direction.

NOTE
When reinstalling the lamp, point the protruding navel
of the lamp toward the opening in the Lamp Reflector
so that the protruding navel will not hit against the
Lamp Reflector.

(6) Removal of the Thermal Fuse

1. Unplug the Thermal Fuse connector.
2. Remove the Thermal Fuse cord from the clamp.

3. Remove two screws and the Aperture Plates Assy.

4. Remove one screw and the Thermal Fuse.

NOTE
The Thermal Fuse must be in contact with the Lamp
Reflector when installed.

In Contact

(7) Cleaning of the 1st, 2nd, and 3rd Mirrors

1. Wipe clean the 1st Mirror with a soft cloth.

D-28
 2. Wipe clean the 2nd Mirror with a soft cloth.

3. Wipe clean the 3rd Mirror with a soft cloth.

(8) Cleaning of the Lens and 4th and 5th Mirrors

1. Remove the Original Glass.
2. Remove two screws and the Optical Cover.
3. Remove two screws and the Lens Cover.

4. Gently dust off the surface of the Lens using a soft

cloth.

5. Wipe clean the 4th and 5th Mirrors with a soft cloth.

D-29
(9) Winding of the Lens Drive Cable

Cable Drive Gear

1. Hold the Cable Drive Gear with the bead at the bottom.

2. Wind the longer length of the cable three and 1/4 turns
clockwise around the Cable Drive Gear, working from
the back to the front side. Then tape it.

1136D137AA

3. Wind the shorter length of the cable three and 1/2

turns counterclockwise around the Cable Drive Gear,
working from the front to back side. Then tape it.

D-30
 4. Pass the longer length of the cable through the hole in
the light blocking plate.
5. Slide the Cable Drive Gear onto its shaft and insert a
wrench into the hole (4-mm dia.) to position the gear.

6. Wind the shorter length of the cable around pulley A.

7. Secure the shorter length of the cable to the Cable

Fixing Bracket.

NOTE
Ensure a distance of 2 mm or less for the dimension
shown on the left.
2 mm or Less

8. Wind the longer length of the cable around pulley B.

9. Hook the spring onto the longer length of the cable
and pull the spring to hook it onto the shorter length of
the cable.
10. Remove the wrench and peel off the two pieces of
tape used in steps 2 and 3.

D-31
(10) Removal of Scanner Motor M2
1. Remove the Original Cover.
2. Remove the Right Cover, Rear Cover, and Rear Upper Cover.
3. Remove the Original Glass.
4. Remove the Optical Cover.
5. Turn the Scanner Motor shaft so that the screw that secures the Scanner Drive Pulley to the
Scanner Motor shaft is aligned with the hole in the optical frame in the rear. Then, remove this
screw.
6. Fix the Scanner Drive Pulley Fixing Jig with a screw to secure the Scanner Drive Pulley in
position.

NOTE
Be sure to use the Scanner Drive Pulley Fixing Jig when removing the Scanner Motor. If it is
not used, the Scanner Drive Pulley is left free, allowing the cable to come unwound.

Make sure that the jig is in

position on the Scanner
Drive Pulley.

Scanner Drive Pulley Fixing Jig

D-32
7. Unplug one connector. Then, remove the edge cover
with a lock and the harness.

8. Remove the locking wiring saddle and the harness.

9. Remove four screws and Scanner Motor M2.

D-33
(11) Winding of the Scanner Drive Cable
◆Important
When the Scanner Drive Cable has been wound:
1) Perform the "focus-positioning of the Scanner and Mirrors Carriage."
2) Slide the Scanner by hand to check for cable tension before turning the copier ON.
3) No part of the cable should ride on others when winding the cable around the Cable Drive Pulley.
Further, no part in the cable should be bent or no part of the cable jacket fray.
∗ Wind the cable five turns around the Cable Drive Pulley.

Wind Cable
5 Turns.

D-34
(12) Removal of the Scanner Drive Cable
1. Remove the Original Cover.
2. Remove the Right Cover, Rear Cover, Rear Upper Cover, and Upper Left Cover.
3. Remove the Original Glass.
4. Remove the Scanner and Optical Cover.
5. Remove Scanner Motor M2.

6. Remove two screws to free the SCP Board (PWB-J)

mounting bracket.
∗ The illustration shows where the SCP Board has
been removed for ease of understanding.

7. Remove three screws and the Scanner Motor

mounting bracket.

8. Remove two screws and the disk.

9. Remove one locking wiring saddle and unplug one

connector.
10. Remove two screws and Original Glass Cooling Fan
Motor M5.

D-35
 11. Using a flat blade screwdriver, loosen the right spring
anchor to unhook the bead from the anchor, thereby
removing the cable.

12. Move the Scanner to the center and remove one

screw that positions the Scanner and the Scanner
Fixing Bracket.

13. Remove one screw and the Scanner Drive Pulley

Fixing Jig.

14. Move the Scanner Drive Cable from the inside of the
upper frame to the Scanner Drive Pulley side. Then,
remove the Scanner Drive Pulley and Scanner Drive
Cable.

(13) Cleaning of the 6th Mirror Protective Filter

Using a soft cloth, wipe clean the 6th Mirror Protective
Filter.

D-36
(14) Cleaning of the Cooling Fan Filter
1. Remove six screws and the Rear Cover.
2. Clean the Cooling Fan Filter using a brush or a
vacuum cleaner.

D-37
2-5. PC UNIT

(1) Removal of the PC Unit

1. Swing down the Front Door.
2. Swing the Transport Section Release Lever down.

3. Loosen two screws that secure the PC Unit.

4. Slide out the PC Unit.

(2) Disassembly of the PC Unit

1. Swing open the Main Hopper and unplug two
connectors.
2. Unplug one connector in the rear.

3. Remove the PC Drum Charge Corona by moving it to

the rear.

4. Remove one screw and the stopper.

5. Remove the PC Drum.

D-38
 6. Unplug two connectors of the Main Hopper.

7. Remove three screws and the Main Hopper.

8. Unplug one connector and remove three screws and

the Sub Hopper.

9. Remove two screws and the Developer Scattering

Prevention Plate.

NOTE
Do not remove the Doctor Blade Assy, as a changed
Db could result.

Rear NOTE
Install the Developer Scattering Prevention Plate so
that its seal is placed behind the side seals of the
Developer Mixing Chamber.

Front

D-39
 10. Dump the developer out of the Developing Unit.

11. Remove two screws and the Cleaning Blade.

NOTE
When reinstalling the Cleaning Blade, press the
blade tightly up against the mounting bracket.

12. Unplug one connector.

13. Remove three screws and the PC Drum Paper
Separator Finger Holder Assy.

Coupling Holder NOTE

When reinstalling the PC Drum Paper Separator
Finger Holder Assy, fit the collar of the assy onto the
coupling holder in the rear.

Collar

D-40
14. Remove the PC Drum Paper Separator Fingers and AIDC Sensor UN3 as shown below.

Assy

UN3

Torsion Spring

∗ PC Drum Paper Separator Fingers

At removal and reinstallation, use care not to damage the tip of the fingers.
Use also care not to get hurt by the tip of the fingers.

PC Drum Paper Separator Finger Installed

∗ Hook the torsion spring properly.

After installation, check that the
Paper Separator Fingers operate
smoothly.
Front Side Back Side

D-41
(3) Replacement of the PC Drum
1. Slide out the PC Unit.
2. Remove one screw and the stopper.
3. Remove and replace the PC Drum.
NOTE
When the PC Drum has been replaced, reset the
count of "PC Drum" of "Port/Option" counters of the
Tech. Rep. mode and then make the "adjustment of
exposure level in the Auto Exposure mode." (For the
"adjustment of exposure level in the Auto Exposure
mode," see p. D-74.)

(4) Cleaning of the Developer Scattering Prevention Plate

Using a brush, whisk dust off the Developer Scattering
Prevention Plate.

(5) Cleaning of the Ds Positioning Collars

Using a brush or a soft cloth dampened with alcohol,
clean the Ds Positioning Collars.

(6) Cleaning of the Toner Antispill Trap

Using a brush or a vacuum cleaner, clean the Toner
Antispill Trap.

(7) Cleaning of the Cleaning Blade

Using a brush, whisk paper dust and toner off the
Cleaning Blade.

D-42
(8) Replacement of the Cleaning Blade
1. Remove and replace the Cleaning Blade.

2. Remove the Toner Bottle from the PC Unit. Insert a

brush through the toner port and into the toner.

3. Apply toner to the entire surface of the new Cleaning

Blade.

NOTE
Be sure to apply toner to both end faces of the
Cleaning Blade.

4. Using the brush, apply lubricant shipped with the

Cleaning Blade to the two side seals shown.

D-43
 5. Install the PC Drum.

NOTE
Do not touch the surface of the PC Drum with bare
hands. Hold onto both ends of the PC Drum when
installing the drum.

1136U014AA

6. Secure the PC Drum stopper with one screw.

1136U015AA

7. Apply a thin coat of toner to an approx. 30-mm-wide

area along the entire length of the PC Drum.

1134U020AA

8. Hold onto both ends of the PC Drum and turn the PC

Drum about 1/2 turn in the direction of the arrow.

1134U021AA

9. Hold onto both ends of the PC Drum and turn the PC

Drum about one turn in the direction of the arrow.

1134U022AA

D-44
(9) Replacement of the Starter
1. Dump the developer out of the Developing Unit.

2. Turning the Bucket Roller, pour fresh starter evenly into the chamber.

NOTE
Shake the packet of starter well before opening it.

NOTE
When the starter has been replaced, reset the count of "Starter" of the "Port/Option" counters of
the Tech. Rep. mode and then make the ATDC adjustment. (For the ATDC adjustment, see p.
D-71.)

D-45
(10) Cleaning of the AIDC Sensor
1. Remove the PC Drum Paper Separator Fingers Assy.
2. Using a brush or a soft cloth dampened with alcohol,
clean the AIDC Sensor.

(11) Cleaning of the PC Drum Paper Separator Fingers

1. Remove the PC Drum Paper Separator Fingers Assy.
2. Using a brush or a soft cloth dampened with alcohol,
clean the PC Drum Paper Separator Fingers.

(12) Replacement and Cleaning of the Toner Antispill Seal and Cleaning
of the Toner Antispill Plate
1. Remove the PC Unit.
2. Remove two screws, the Toner Antispill Plate, and
Toner Antispill Seal.
3. Replace the Toner Antispill Seal.

4. Using a brush, clean the Toner Antispill Seal.

5. Using a brush, clean the Toner Antispill Plate.

NOTE
When reinstalling the Toner Antispill Plate and Toner
Antispill Seal, press them in the direction of the
arrows.

D-46
(13) Removal of Main Erase Lamp LA3
1. Swing down the Front Door.
2. Unplug one connector.
3. Remove one screw and Main Erase Lamp LA3.

(14) Cleaning of the Main Erase Lamp Filter

1. Swing down the Front Door.
2. Remove the Main Erase Lamp Filter.

3. Using a soft cloth dampened with alcohol, wipe clean

the Main Erase Lamp Filter.

(15) Cleaning of Image Erase Lamp LA2

1. Swing down the Front Door.
2. Remove the PC Unit.
3. Using a soft cloth dampened with alcohol, wipe clean
Image Erase Lamp LA2.

(16) Replacement of Image Erase Lamp LA2

1. Swing down the Front Door.
2. Remove the PC Unit.
3. Remove one adjusting screw to free Image Erase
Lamp LA2.

D-47
 4. Unplug one connector in the rear and remove Image
Erase Lamp LA2.

NOTE
When Image Erase Lamp LA2 has been removed,
make the "adjustment of edge erase." (For the
adjustment of edge erase, see p. D-??.)

(17) Removal of the Ozone Filter (PC Drum Charge Corona)

1. Swing down the Front Door.
2. Swing out the Main Hopper.
3. Slide out the Ozone Filter.

(18) Removal of the Ozone Filter (Image Transfer/Paper Separator

Coronas)
1. Remove the Rear Cover.
2. Remove one screw and the Filter Cover.
3. Pull out the Ozone Filter.

(19) Removal of the Toner Collecting Box (Except the U.S.A., Canada,
and Europe)
1. Remove the Rear Cover.
2. Remove the Toner Collecting Box.
∗ For removal of the large capacity Toner Collecting
Box, please refer to the instructions on the large
capacity Box.

D-48
2-6. PC DRUM CHARGE CORONA AND IMAGE TRANSFER/PAPER
SEPARATOR CORONAS

(1) Removal of the PC Drum Charge Corona

1. Swing down the Front Door.
2. Remove the PC Unit.
3. Swing out the Main Hopper and unplug the connector
of Charge Corona Wire Spool Motor M10 at the front.

1134U002AA

4. Unplug the connector of Charge Corona Wire Spool

Sensor PC32 in the rear.

1134U003AA

5. Move the PC Drum Charge Corona to the rear and

pull it off.

1134U004AA

(2) Replacement of the PC Drum Charge Corona Wire Assy

The corona wire should be replaced when
• The wire has snapped.
• "Charge Wire" of the "Port/Option" counters reads about 180 (K).

Counter BackUp Menu

To check for the count of "Charge Wire," access the
"Port/Option 3/3" screen through the following:
Port/Option 3/3
Tech. Rep. → Counter → Port/Option 1/3 →
Puncher 0
PC Drum 12345 Port/Option 3/3.
Starter 1234
Fusing Roller 123
Charge Wire 12 NOTE
When the PC Drum Charge Corona Wire Assy has
been replaced, press the Clear Key to reset the count
to 0 and touch Menu to validate the resetting.

1134D190CA
1134D190CA

D-49
 1. Remove the PC Drum Charge Corona.
2. Press the Mesh Holder at the front and remove the
Grid Mesh.

3. Remove the Mesh Holder Covers at the front and rear.

NOTE
Remove the rear Holder only when the PC Drum
Charge Corona Wire Assy is to be replaced with a
new one. When it is removed, the spring tends to sag
and the rear Bobbin turns to give slack to the wire.

4. Remove one screw from the front Take-Up Bobbin.

5. Holding onto the front and rear Bobbins, remove the PC Drum Charge Corona Wire Assy and
install a new wire assy.

NOTES
Observe the following precautions when installing a new PC Drum Charge Corona Wire Assy.
• The wire should not be twisted, bent, or broken when installed. (If it is, it can snap off when
tightened.)
• Do not touch the wire with bare hands, as uneven charging could result.
• When "Charge Wire" of the "Port/Option" counters is reset to 0 after the new wire assy has
been installed, the corona wire is automatically taken up 1(K) count (which is equivalent to
about 20 mm). This gives an adequate tension to the wire.

Spring

1134D061AA

D-50
(3) Cleaning of the PC Drum Charge Corona Wire
As a rule, the PC Drum Charge Corona Wire is not to be cleaned. Should it be contaminated
causing uneven charging, the following step can be taken.

• Take up the corona wire as necessary to expose a clean, new portion of the wire.

When the function "Advance Charge Wire" of "System Input" available from the Tech. Rep.
mode menu is invoked, the wire is taken up a length of about 104 mm.

NOTE
This method, however, shortens the PM cycle of the PC Drum Charge Corona Wire Assy.

<"Advance Charge Wire" Steps>

1. Set the copier into the Tech. Rep. mode by pressing the keys in the following order:
Stop → "0" → Stop → "1"
2. Select "System Input" on the "Tech. Rep. Mode Menu."
3. Select "Advance Charge Wire" on the "System Input" screen and touch [Enter] to let the
copier take up the corona wire.

NEVER clean the wire using the following procedure, as a slack wire results.

Tweezers

Cloth
Front

1134D061AA

D-51
(4) Cleaning of the PC Drum Charge Corona Grid Mesh
1. Blow all foreign matter off the Grid Mesh with a blower
brush.

NOTE
If the blower brush is not effective in cleaning the
Grid Mesh, use a soft cloth dampened with alcohol to
clean serious contamination.
1136D195AA

NOTE
Place the Grid Mesh on a flat surface and sweep the
cloth along the mesh.
Do not touch the cleaned Grid Mesh with bare hands.

1136D196AA

(5) Cleaning of the PC Drum Charge Corona Housing

1. Remove the Grid Mesh.
2. Using a soft cloth dampened with alcohol, clean the
corona housing.

NOTE
When wiping the housing clean, use care not to touch
the wire, as a slack wire results.
1136D197AA

(6) Removal of the Image Transfer/Paper Separator Coronas

1. Swing down the Front Door.
2. Pull out the Image Transfer/Paper Separator Coronas.

1134D062AA

(7) Cleaning and Replacement of the Image Transfer Corona Wire

1. Swing down the Front Door.
2. Clean the Image Transfer Corona Wire using the
Corona Wire Cleaning Lever.

1136D198AA

D-52
 NOTE
If the Image Transfer Corona Wire is seriously
contaminated, dampen a soft cloth with alcohol, hold
it with a pair of tweezers, and wipe the wire gently in
one direction - from the hook end to the spring end.

1136D199AA

3. Remove the Holder Covers at the front and rear.

1136D200AA

4. Remove the corona wire, first at the spring end.

5. Replace the corona wire with a new one.

1136D201AA

(8) Cleaning and Replacement of the Paper Separator Corona Wire

1. Remove four Paper Guides.

1136D202AA

2. Dampen a soft cloth with alcohol, hold it with a pair of

tweezers, and wipe the Paper Separator Corona Wire
gently in one direction - from the hook end to spring
end.
3. Replace the Paper Separator Corona Wire by using
the same procedure as that for the Image Transfer
Corona Wire.

1136D203AA

D-53
(9) Cleaning of the Image Transfer/Paper Separator Coronas Housing
1. Remove four Paper Guides.
2. Remove the Holder Covers at the front and rear.
3. Remove the Image Transfer and Paper Separator
Corona Wires - first at the spring end.
4. Using a soft cloth dampened with alcohol, wipe the
housing clean of dirt.

1136D205AA

(10) Cleaning of the Lower Pre-Image Transfer Guide Plate

Using a soft cloth dampened with alcohol, wipe clean
the Lower Pre-Image Transfer Guide Plate.

1136D206AA

D-54
2-7. FUSING UNIT

(1) Removal of the Fusing Unit

1. Open the Left Door.
2. Swing down the Front Door.
3. Remove one screw and the Fusing Unit.

1136D207AA

(2) Disassembly of the Fusing Unit

1. Remove two screws and the Front Cover.

1136D208AA

2. Unplug the Heater Lamp connector at the front.

3. Remove the Heater Lamp cord from the wiring saddle.
4. Remove one screw and the Lamp Holder at the front.

1136D209AA

5. Unplug the Heater Lamp connector in the rear.

6. Remove one screw and the Lamp Holder in the rear.
7. Remove the Heater Lamp cord from the wiring saddle.
8. Remove the Heater Lamp.

1136D210AA

9. Remove two screws and the Upper Cover.

1136D211AA

D-55
 10. Remove two screws and the Upper Fusing Paper
Separator Finger mounting bracket.

1136D212AA

NOTE
When reinstalling the Upper Fusing Paper Separator
Finger mounting bracket, be sure that both ends of
the bracket are in tight contact with the frame.

1136D213AA

11. Remove the harness from the Harness Guide.

12. Unplug the connectors of the two Thermistors.

1136D214AA

13. Remove one screw, shoulder screw, and the Harness

Guide.
14. Remove one screw and the Thermoswitch cord.

1136D215AA

15. Remove two screws and the Temperature Detector

Assy.

1136D216AA

D-56
 NOTE
When reinstalling the Temperature Detector Assy, be
sure that both ends of the assy are in tight contact
with the frame.

16. Remove two screws and the Fusing Unit Entrance Guide Plate.

NOTE
When reinstalling the Fusing Unit Entrance Guide Plate, allow a clearance of 0.8 mm for
dimension A shown below. Make also sure that the plate presses the bushing in the rear (drive
end) in the thrust direction (in the direction of the arrow) at installation. (The plate should not
ride on the rear bushing.)

Rear Bushing in Position

Fusing Unit Entrance

Guide Plate

Bushing

1134D064AA

D-57
17. Remove two shoulder screws and the Lower Exit Guide Assy.
∗ The illustration below shows where the torsion springs have been removed.

Rear
Lower
Shoulder Screw Fusing Roller

Upper Fusing Roller

Torsion Spring
Screw

Rubber Bushing

Torsion Spring

Shoulder
Collars Screw

Rubber
Bushing

Screw Front
Lower Exit Guide Assy

Torsion Springs in Position Lower Exit Guide Assy in Position

Rear ➀ Installing the Lower Exit Guide Assy

Hook

Lower Fusing
Roller
Torsion Spring

➁ Lower Fusing Paper Separator Finger

Rear Hook Contact

No Clearance
Allowed.

Torsion Spring 1134D066AA 1134D067AA

D-58
18. Loosen the screw that secures the spring bracket at the front and then unhook the spring at the
top.
Repeat the same step for the spring in the rear.
NOTE
When reinstalling the springs, alternately tighten the bracket mounting screws until the brackets
completely contact the ends of the Lower Exit Guide Assy.

1136D221AA

19. Remove the Lower Fusing Roller.

1136D223AA

20. Remove two extension springs.

21. Remove two E-rings, the gear, bushing, and Cleaning
Roller.

1136D224AA

22. Remove two screws, the Upper Fusing Roller drive

gear, and Upper Fusing Roller.

1136D225AA

D-59
(3) Replacement and Cleaning of the Upper Fusing Paper Separator
Fingers
1. Remove the Upper Fusing Paper Separator Finger
mounting bracket.
2. Remove five springs.
3. Slide out the shaft to remove the Upper Fusing Paper
Separator Fingers.
4. Replace the fingers with new ones.

1136D226AA

5. Using a soft cloth dampened with alcohol or silicone

oil, wipe clean the Upper Fusing Paper Separator
Fingers.

1136D227AA

(4) Cleaning of the Lower Fusing Paper Separator Fingers

1. Remove the Lower Exit Guide Assy.
2. Using a soft cloth dampened with alcohol or silicone
oil, wipe clean the Lower Fusing Paper Separator
Fingers.

1136D228AA

(5) Cleaning of the Fusing Unit Entrance Guide Plate

Using a soft cloth dampened with alcohol, wipe clean
the Fusing Unit Entrance Guide Plate.

1136D229AA

(6) Cleaning of Fusing Front and Rear Thermistors TH1/2

1. Remove the Temperature Detector Assy.
2. Using a soft cloth dampened with alcohol, wipe clean
the two thermistors.

1136D230AA

D-60
(7) Cleaning of Fusing Thermoswitch TS1
1. Remove the Temperature Detector Assy.
2. Using a soft cloth dampened with alcohol, wipe clean
the thermoswitch.

1136D231AA

(8) Replacement and Cleaning of the Cleaning Roller

1. Remove two screws and the Upper Cover.
2. Remove the Cleaning Roller.
3. Replace the Cleaning Roller with a new one.

1136D224AA

4. Using a brush, whisk dust off the Cleaning Roller.

1136D232AA

(9) Replacement and Cleaning of the Upper Fusing Roller

1. Remove the Upper Fusing Roller.
2. Replace the Upper Fusing Roller with a new one.

1136D225AA

3. Using a soft cloth dampened with alcohol or silicone

oil, wipe clean the Upper Fusing Roller.

1136D233AA

D-61
(10) Replacement and Cleaning of the Lower Fusing Roller
1. Remove the Lower Fusing Roller.
2. Replace the Lower Fusing Roller with a new one.

1136D223AA

3. Using a soft cloth dampened with alcohol or silicone

oil, wipe clean the Lower Fusing Roller.

1136D234AA

D-62
2-8. EXIT UNIT

(1) Removal of the Exit/Duplex Switching Unit

1. Remove the Rear Cover.
2. Open the Left Door.
3. Remove the Upper Left Cover.

4. Remove four screws to free the Sorter Connector

Assy.

1134D144AA

5. Unplug two connectors.

6. Remove one screw and the ground wire.

1134D145AA

7. Snap off the E-ring from the shaft onto which the
Exit/Duplex Switching Unit is mounted.
8. Work the harness indicated by the arrow off the wiring
saddle.

1136D236AA

9. Remove one screw that holds the belt.

10. Remove two screws and the mounting bracket.
11. Remove the Exit/Duplex Switching Unit.

1136D237AA

D-63
 3 ADJUSTMENT
3-1. JIGS AND TOOLS USED
◆Important
• When positioning the Scanner and 2nd/3rd Mirrors Carriage, use jig nos. ➂ and ➃.
• When adjusting the gap between the Doctor Blade and Sleeve Roller, use jig nos. ➄ and ➅.
• When adjusting the position of the PC Drum Paper Separator Fingers, use jig nos. ➄ and ➆.
• For the Predrive Inhibit Switch Actuating Jig ➁, use the Interlock Switch Actuating Jig provided for
EP3170.
• The numbers given together with the illustrations below are the jig part numbers. A kit number is
assigned to each of the Front Door Interlock Switch Actuating Jig ➀, Scanner/Mirrors Carriage
Positioning Jig ➃, and Sleeve/Magnet Roller Positioning Jig ➄. These jigs are supplied only as a
kit and are not available as individual parts.

➀ Front Door Interlock Switch ➁ Predrive Inhibit Switch

Actuating Jig Actuating Jig
Kit: 1136-0756-01 1067-7901-01

1136D001AA 1136D005AA

➂ Scanner Positioning Jig ➃ Scanner/Mirrors Carriage

Positioning Jig
1136-7901-01 Kit: 1136-0757-01

1136D002AA 1136D006AA

➄ Sleeve/Magnet Roller ➅ D.B. Adjusting Jig

Positioning Jig
Kit: 1136-0759-01 1134-7902-01

1136D003AA

➆ PC Drum Paper Separator ➆ Scanner Drive Pulley

Finger Positioning Jig Fixing Jig

1136-7907-01 1134-7901-01

1136D004AA 1134D068AA

D-64
3-2. ADJUSTMENT REQUIREMENTS LIST
Ref.
Adjustment Item Requirements Adjusting Point
Page
Kodak Gray Scale: no
Optimum exposure in the
image of the 1st step, faint Control panel D-78
Manual Exposure mode
image of the 2nd step
Crosswise zoom ratio, full
(×1.000) 200 ±1.0 mm Control panel D-80
size
Feeding direction zoom
(×1.000) 300 ±1.5 mm Control panel D-82
ratio, full size
Multi Bypass Table
(×1.000) 20 ±2.0 mm Multi Bypass Table D-84
reference position
1st Drawer reference
(×1.000) 20 ±2.0 mm Drawer Positioning Plate D-85
position
2nd Drawer reference
(×1.000) 20 ±2.0 mm Drawer Positioning Plate D-85
position
Leading edge registration,
(×1.000) 20 ±1.5 mm Control panel D-86
full size
Leading edge registration,
(×2.000) 40 ±3.0 mm Control panel D-88
enlargement
Leading edge registration,
(×0.500) 10 ±1.5 mm Control panel D-90
reduction
Leading edge registration,
(×1.000) 20 ±3.0 mm Control panel D-92
book second page
Image leading edge erase
(×1.000) 1~6.5 mm Control panel D-94
width
Image trailing edge erase
(×1.000) 0.5~5.5 mm Control panel D-96
width
Edge erase (×1.000) 0.5~3.0 mm Edge Erase Adjusting Screw D-98

D-65
3-3. ADJUSTMENT OF SWITCHES

Microswitches
The following microswitches are used in various parts of this copier.

Blue (NC)
Yellow (NO)

Red (COM) Red (COM)

Wiring for the NO Type Wiring for the NC Type

NC (Normally-Closed) : Current flows between NC and COM when the actuator is open.
NC (Normally-Open) : Current flows between NO and COM when the actuator is closed.
COM (Common) : Common contact for NC and NO.

Requirement

The gap between the switch and actuator should be 0.1 to

Actuator 0.5 mm when the actuator is closed.

0.1 mm to
0.5 mm

Out-of-Adjustment (When the actuator is closed)

• If the gap between the switch and actuator is too big, current does not at times flow to NC or NO.
• If there is no gap between the switch and actuator, the actuator is bent or the switch can be
broken.

D-66
Adjustment of Front Door Interlock Switch S21

1. Swing down the Front Door.

2. Remove six screws and Upper Left Cover.

3. Remove three screws and the cover.

4. Loosen two screws that secure Front Door Interlock
Switch.

5. Close the Front Door.

6. Slowly move the switch to the front until the actuator is
closed by the actuator stop on the Front Door. Then,
tighten the two mounting screws.

• The switch is wired for the NO type.

D-67
3-4. ADJUSTMENT OF BELT TENSION
◆Important

• Make sure that all gears are in positive mesh with each other and the belts snugly fit in the
pulley grooves.
• Each belt should flex a little when finger-pressed down on the location indicated by the arrow.

Belt Tension Deflection (Reference only)

Paper Take-Up Unit Timing
(1) 300 ±100 g Approx. 3 mm
Belt
(2) Developing Unit Timing Belt 350 ±100 g Approx. 4 mm
(3) Fusing Unit Timing Belt 350 ±100 g Approx. 3 mm
(4) PC Unit Timing Belt 350 ±100 g Approx. 5 mm

1. Loosen two screws that hold the Tension Lever. Press the Tension Lever in the direction of the
arrow. When belt tension is correct, tighten the two screws.

350 ±100 g 350 ±100 g

300 ±100 g

350 ±100 g

D-68
3-5. ACCESSING THE TECH. REP. MODE AND ADJUST MODE
◆Accessing the Tech. Rep. Mode
To access the Tech. Rep. mode, press the following keys in that order.

Stop Key → "0" of 10-Key Pad → Stop Key → "1" of 10-Key Pad

1 2 3 Tech. Rep. Mode Menu

4
4 5 6
Function ROM Version
7 8 9
Tech. Rep. Choice RD Mode
0 C

2 System Input ADF Check

Counter Level History

1 3 I/O Check Machine status

Last Trouble Admin. Mode

1 2 3 4 1134D069AA
1134D069AA
Press the keys in order of [1], [2], [3], and [4]. 1134D147CA

◆Accessing the Adjust Mode

To access the Adjust mode, press the following keys in that order with the Tech. Rep. mode menu
on the screen.

Stop Key → Start Key

1 2 3 Adjust Enter

4 5 6 Adjust 1/2
7 8 9 A0 Lens Focus 50
A1 Lens Full Size Position 50
0 C
A2 Mirror Full Size Position 50
A3 Feed Direction Mag. Ratio 50
A4 Lens Position Full Size 50
A5 Lens Position Reduction 50

2 1 49-51

Next
1 2 1134D071AA
1134D071AA 1134D148CA
Press the keys in order of [1] and [2].

D-69
3-6. ELECTRICAL/IMAGE ADJUSTMENTS

(1) Initial Adjustment of Original Size Detecting Board

◆Important

• The following adjustment must be made when memory has been cleared, RAM Board PWB-R or
Original Size Detecting Board UN2 replaced, or an Original Size Detecting Sensor replaced or
added.

1. Lower the Original Cover with no original placed on

the Original Glass.

1136D017AA

2. Call the Tech. Rep. mode menu to the screen.

3. Touch [Function] to show the Function menu on the screen.
4. Touch [F7 Orig. Sensor].
5. Press the Start Key to let the copier make the initial adjustment of the Original Size Detecting
Board.

Tech. Rep. Mode Menu Exit Function Menu

Function ROM Version F1 PaperPassage F7 Orig. Sensor

Tech. Rep. Choice RD Mode F2 Drum/Trans F8 ATDC Adjust

System Input ADF Check F3 Exp. Lamp

Counter Level History F4 HV Separator

I/O Check Machine status F5 Optimum & AE FF F8 F5

Last Trouble Admin. Mode F6 Edit Ref. Adj

1134D149CA 1134D150CA

NOTE
While the copier is in the adjustment cycle, the Start Key is lit up orange. The key turns green
as soon as the adjustment cycle is completed.

6. After the adjustment has been made, press the Panel Reset Key to return the copier to the
normal operating state.

D-70
(2) ATDC Adjustment
◆Important

Make this adjustment only after the starter has been replaced.

1. Load the PC Unit with fresh starter.

2. Reinstall the PC Unit in the copier.

1134D051AA

3. Call the Tech. Rep. mode menu to the screen.

4. Touch [Function] to show the Function menu on the screen.
5. Touch [F8 ATDC Adjust].
6. Press the Start Key to let the copier make the ATDC adjustment. (It will run for about 3 minutes.)

Tech. Rep. Mode Menu Exit Function Menu

Function ROM Version F1 PaperPassage F7 Orig. Sensor

Tech. Rep. Choice RD Mode F2 Drum/Trans F8 ATDC Adjust

System Input ADF Check F3 Exp. Lamp

Counter Level History F4 HV Separator

I/O Check Machine status F5 Optimum & AE FF F8 F5

Last Trouble Admin. Mode F6 Edit Ref. Adj

1134D151CA 1134D152CA

NOTES
• While the copier is in the adjustment cycle, the Start Key is lit up orange. The key turns green
as soon as the adjustment cycle is completed.
• The press of the Start Key will automatically starts the ATDC adjustment cycle. Be sure to run
this cycle only after the starter has been replaced.

D-71
6. Touch [Menu] on the screen to show the Tech. Rep. mode menu again.
7. Touch [Level History] and enter the value for the "ATDC Set Level" on the Adjust Label affixed
inside the Front Door.
8. Then, press the Panel Reset Key to return the copier to the normal operating state.

Tech. Rep. Mode Menu Exit Level History Menu

Function ROM Version Level History 1/2

Tech. Rep. Choice RD Mode ATDC Level - Set 254

ATDC Level - Correction 5.0 %
Vg Level - Initial 550 V
System Input ADF Check
Vg Level - Current 580 V

Counter Level History

I/O Check Machine status 2-254

Last Trouble Admin. Mode Next

1134D153CA 1134D194CB
Enter This Value on the Adjust Label.

◆Should the F8 operation be run when the starter has not been replaced, check that the "ATDC Set
Level" value on the "Level History" screen matches that written on the Adjust Label. If they do not
agree with each other, change the "ATDC Set Level" value on the screen so that it matches the
value on the Adjust Label.

Tech. Rep. Mode Menu Exit Level History Menu

Function ROM Version Level History 1/2

ATDC Level - Set 254

Tech. Rep. Choice RD Mode
ATDC Level - Correction 5.0 %
Vg Level - Initial 550 V
System Input ADF Check Vg Level - Current 580 V

Counter Level History

I/O Check Machine status 2-254

Last Trouble Admin. Mode Next

1134D155CA 1134D195CA

Touch the shift key or to change

the value and touch Menu to validate the
new setting.

D-72
(3) Adjustment of the Aperture Plates
◆Requirement
• There should be no dark or light bands running in the feeding direction on the copy produced.

◆Important

• If dark or light bands running in the feeding direction occur on the copies, first make the
following checks before starting the adjustment procedure.
1) The PC Drum Charge Corona wire, grid mesh, and the Image Transfer Corona wire are all
free of dirt.
2) The surfaces of the Mirrors and Lens are free of dirt.
3) The surfaces of the Exposure Lamp and Main Erase Lamp are free of scratches and dirt.
4) The Cleaning Blade has not decayed or hardened or is not wavy.

1. Make a copy under the following control panel settings.

Original: A3 or A4 crosswise,
11" × 17" or 11" × 8-1/2" crosswise
Paper: A3 or A4 crosswise,
11" × 17" or 11" × 8-1/2" crosswise
Zoom ratio: 100%
Exposure: Manual (setting convenient for the check)

2. Remove the Original Glass.

3. Turn the copy on the Exit Tray around as shown to
reverse the leading and trailing edges and align it with
the Aperture Plates.

4. Adjust to obtain the center image density for all areas

of the copy.

NOTE
To make the image darker, move the Aperture Plates
toward the Auxiliary Reflector.
To make the image lighter, move the Aperture Plates
away from the Auxiliary Reflector.

D-73
(4) Adjustment of Exposure Level in the Auto Exposure Mode
◆Important

• Before starting the procedure, check that the Auto Exposure mode is selected on the Touch
Panel.
• For the adjustment, place about five blank sheets of A3 or 11" × 17" paper one on top of the
other on the Original Glass and lower the Original Cover.
• After this adjustment, be sure to check the optimum exposure setting in the Manual Exposure
mode.

1. Make sure that the Auto Exposure mode is selected on the Touch Panel. Then, place about five
blank sheets of A3, or 11" × 17", paper one on top of the other on the Original Glass and lower
the Original Cover.

Auxiliary Finishing Orig. Copy Basics

Ready to copy.
1
Auto Expo. x1.000 Auto Paper

Exposure Zoom Paper

1134D193CA

2. Call the Tech. Rep. mode menu to the screen.

3. Touch [Function] to show the Function menu on the screen.
4. Touch [F5 Optimum & AE].
5. Press the Start Key to let the copier adjust the exposure level in the Auto Exposure mode. (It will
run for about 30 seconds.)

Tech. Rep. Mode Menu Exit Function Menu

Function ROM Version F1 PaperPassage F7 Orig.Sensor

Tech. Rep. Choice RD Mode F2 Drum/Trans F8 ATDC Adjust

System Input ADF Check F3 Exp. Lamp

Counter Level History F4 HV Separator

I/O Check Machine status F5 Optimum & AE FF F8 F5

Last Trouble Admin. Mode F6 Edit Ref. Adj

1134D157CA 1134D158CA

While the copier is in the adjustment cycle, the Start Key is lit up orange. The key turns green as
soon as the adjustment cycle is completed.

6. After the adjustment, touch [Menu] to return the copier to the normal operating state.
7. Check the optimum exposure setting in the Manual Exposure mode. (See p. D-75.)

D-74
(5) Adjustment of Optimum Exposure Setting in the Manual Exposure
Mode
◆Requirement
• Exposure Lamp voltage setting range in the Manual Exposure mode ... 44 to 56
• When the manual exposure setting is at the central indication, no image of step no. 1 of a Kodak
Gray Scale should be produced on the copy, but a faint image of step no. 2 should be produced.

A 1 2 3 4 5 6 M

1136D300AA

◆Important

This adjustment should be made only after completing the "Adjustment of Exposure Level in the
Auto Exposure Mode" and "Adjustment of the Aperture Plates."

∗ If the setting has been changed in this adjustment, be sure to make the "adjustment of exposure
level in the Auto Exposure mode."

1. Place the Kodak Gray Scale lengthwise, face

Auxiliary Finishing Orig. Copy Basics down, and at the center on the Original Glass.
Ready to copy. Place a sheet of pure white A3 or 11" × 17"
1
paper over it and then lower the Original Cover.
Auto Expo. x1.000 Auto Paper 2. Set the copier into the Manual Exposure mode
and set the exposure setting to the central or
fifth indication (EXP5). Make about 15 copies
using A3 or 11" × 17" paper (so that the PC
Drum sensitivity stabilizes). Then, check that
Auto Darker
Lighter the 15th copy meets the requirement given
above.
1134D197CA ∗ If the image density is outside the
specifications, make the following adjustment.

3. Call the Tech. Rep. mode menu to the screen.

4. Touch [Tech. Rep. Choice] to show the "Tech. Rep. Choice 1" menu on the screen.

Tech. Rep. Mode Menu Exit Tech. Rep. Choice Enter

Function ROM Version Tech. Rep. Choice 1

Plug-In Counter # of Sheets
Tech. Rep. Choice RD Mode Size Counter 11X17
Total Counter Mode 1
System Input ADF Check Maintenance Call Yes
Copy Kit Counter NO
Counter Level History Toner Empty Stop Enable Copy

I/O Check Machine status # of Sheets Copy Cycle

Last Trouble Admin. Mode Next

1134D159CA 1134D160CA

D-75
5. Touch [Next] twice to show the "Tech. Rep. Choice 3" menu on the screen.

▲
▼
6. Observing the image density of the sample copy, touch the shift key [ ] or [ ] to change the
setting for "Exp. Lamp Manual Adj."
7. Touch [Enter] to validate the setting.
8. Run the F5 operation again.

Setting Instructions
• If the image density is low, decrease the setting value.
• If the image density is high, increase the setting value.

∗ If the image density does not fall within the specifications through one setting, try another
setting.

Tech. Rep. Choice Enter Tech. Rep. Choice BackUp Enter

Tech. Rep. Choice 1 Tech. Rep. Choice 3

Plug-In Counter # of Sheets Exp. Lamp Manual Adj. 50
Size Counter 11X17 ATDC T/C Ratio 51
Total Counter Mode 1
Maintenance Call Yes
Copy Kit Counter NO
Toner Empty Stop Enable Copy

# of Sheets Copy Cycle 47-54

Next

1134D161CA 1134D162CA

Touch This Key Twice. Touch This Key if

ID is High.
Touch This Key if ID is Low.
NOTE
Be sure to touch [Enter] before pressing the Panel Reset Key to return the copier to the normal
operating state. If this is not done, the old setting remains valid.

D-76
(6) Adjustment of Zoom Ratio in the Crosswise Direction
("Adjust A1 = Lens Full Size Position")
◆Requirement
• This adjustment is made for the zoom ratio in the crosswise direction.
• A scale is placed on the Original Glass to run parallel with the Scanner and the length of the
scale on the copy is compared with that of the actual scale. The adjustment must be made so
that the difference between the two dimensions falls within the following specifications.

The difference should be within ±0.5% of the actual length.

Against 200 mm, allowance is 200 mm × 0.005 = 1.0 mm.

Zoom Ratio Specifications Adjusting Mode Setting Range

Adjust A1 = Lens Full
Full size (×1.000) 200 ±1.0 mm 43 to 58
Size Position

◆Important

This adjustment must be made before the "Reference Position Adjustments."

1. Place a scale in parallel with the Original Width Scale

and make a copy.
∗ Use the full size (×1.000) mode and
200-mm-or-wider paper.
∗ If the scale is of plastic and transparent, place a
blank sheet of paper on it.

2. Allow the copy to stand for 3 minutes, then measure

the length to determine the zoom ratio in the
crosswise direction.
Using the scale, measure the length of the scale on
the copy to find any difference.
∗ If the zoom ratio deviates from the specifications, go
to the next step.

D-77
3. Call the "Adjust 1/2" menu to the screen.
4. Touch the select key [▼] or [▲] to highlight "A1 Lens Full Size Position."

Adjust Enter Adjust Enter

Adjust 1/2 Adjust 1/2

A0 Lens Focus 50 A0 Lens Focus 50

A1 Lens Full Size Position 50 A1 Lens Full Size Position 50
A2 Mirror Full Size Position 50 A2 Mirror Full Size Position 50
A3 Feed Direction Mag. Ratio 50 A3 Feed Direction Mag. Ratio 50
A4 Lens Position Full Size 50 A4 Lens Position Full Size 50
A5 Lens Position Reduction 50 A5 Lens Position Reduction 50

49-51 43-58

Next Next

1134D163CA 1134D164CA
▲

5. Touch the shift key [ ] or [ ] to change the set value.

▼

6. Touch [Enter] to validate the setting.

Setting Instructions
• If the scale on the copy is longer than the actual scale, decrease the setting value.
• If the scale on the copy is shorter than the actual scale, increase the setting value.

∗ If the measurement does not fall within the specifications through one setting, try another
setting.

Adjust Enter

Adjust 1/2

A0 Lens Focus 50
A1 Lens Full Size Position 50 Setting Value
A2 Mirror Full Size Position 50
A3 Feed Direction Mag. Ratio 50
A4 Lens Position Full Size 50
A5 Lens Position Reduction 50

43-58

Next

1134D165CA

Touch This Key if Measurement is Shorter.

Touch This Key if Measurement is Longer.

NOTE
Be sure to touch [Enter] before pressing the Panel Reset Key to return the copier to the normal
operating state. If this is not done, the old setting remains valid.

D-78
(7) Adjustment of Zoom Ratio in the Feeding Direction
("Adjust A3 = Feed Direction Mag. Ratio")
◆Requirement
• This adjustment is made for the zoom ratio in the feeding direction.
• A scale is placed on the Original Glass perpendicularly to the Scanner and the length of the
scale on the copy is compared with that of the actual scale. The adjustment must be made so
that the difference between the two dimensions falls within the following specifications.

The difference should be within ±0.5% of the actual length.

Against 300 mm, allowance is 300 mm × 0.005 = 1.5 mm.

Zoom Ratio Specifications Adjusting Mode Setting Range

Adjust A3 = Feed
Full size (×1.000) 300 ±1.5 mm 46 to 54
Direction Mag. Ratio

◆Important

This adjustment must be made before the "Reference Position Adjustments."

1. Place a scale in parallel with the Original Length Scale

and make a copy.
∗ Use the full size (×1.000) mode and A3 or 11" × 17"
paper.
∗ If the scale is of plastic and transparent, place a
blank sheet of paper on it.

2. Allow the copy to stand for 3 minutes, then measure

the length to determine the zoom ratio in the feeding
direction.
Using the scale, measure the length of the scale on
the copy to find any difference.
∗ If the zoom ratio deviates from the specifications, go
to the next step.

D-79
3. Call the "Adjust 1/2" menu to the screen.
4. Touch the select key [▼] or [▲] to highlight "A3 Feed Direction Mag. Ratio."

Adjust Enter Adjust Enter

Adjust 1/2 Adjust 1/2

A0 Lens Focus 50 A0 Lens Focus 50

A1 Lens Full Size Position 50 A1 Lens Full Size Position 50
A2 Mirror Full Size Position 50 A2 Mirror Full Size Position 50
A3 Feed Direction Mag. Ratio 50 A3 Feed Direction Mag. Ratio 50
A4 Lens Position Full Size 50 A4 Lens Position Full Size 50
A5 Lens Position Reduction 50 A5 Lens Position Reduction 50

49-51 46-54

Next Next

1134D166CA 1134D167CA
▼

5. Touch the shift key [ ] or [ ] to change the set value.

6. Touch [Enter] to validate the setting.

Setting Instructions
• If the scale on the copy is longer than the actual scale, decrease the setting value.
• If the scale on the copy is shorter than the actual scale, increase the setting value.

∗ If the measurement does not fall within the specifications through one setting, try another
setting.

Adjust Enter

Adjust 1/2

A0 Lens Focus 50
A1 Lens Full Size Position 50
A2 Mirror Full Size Position 50
A3 Feed Direction Mag. Ratio 50
A4 Lens Position Full Size 50
A5 Lens Position Reduction 50

46-54

Next

1134D168CA

Touch This Key if Measurement is Shorter.

Touch This Key if Measurement is Longer.

NOTE
Be sure to touch [Enter] before pressing the Panel Reset Key to return the copier to the normal
operating state. If this is not done, the old setting remains valid.

D-80
(8) Adjustment of Reference Position of the Multi Bypass Table
◆Requirement

• Dimension A on the copy of the GTC-test chart should

measure 20 mm ±2.0 mm in the full size (×1.000) mode.

Dimension A

◆Important

This adjustment should be made after the "adjustment of zoom ratio in the crosswise direction."

1. Place the GTC-test chart face down on the Original

Glass and align its rear left corner with the reference
marker on the Original Width Scale on the left side of
the platen. Then, lower the Original Cover.
2. Feeding a sheet of A3 or 11" × 17" paper through the
Multi Bypass Table, make one full-size copy.
3. Check if dimension A (from the edge up to the
reference line) on the copy is up to the specifications.
1136D030AA

4. If dimension A deviates from the specifications, loosen

three screws that secure the Multi Bypass Table and
move the table in the direction of the arrow as
necessary.

Adjusting Instructions
• If dimension A on the copy is shorter than 18 mm,
move the table to the front of the copier.
1136D031AA • If dimension A on the copy is longer than 22 mm,
move the table to the rear of the copier.

NOTE
When a Duplexing Document Feeder is mounted, it
involves changing the Original Glass. This in turn
results in the position of the Original Length Scale
being slightly shifted to the rear. This can
nonetheless be corrected with the Original
Positioning Plate.

D-81
(9) Adjustment of Reference Position of the 1st/2nd Drawer
◆Requirement

• Dimension A on the copy of the GTC-test chart should

measure 20 mm ±2.0 mm in the full size (×1.000) mode.

Dimension A

◆Important

This adjustment should be made after the "adjustment of zoom ratio in the crosswise direction."

1. Place the GTC-test chart face down on the Original

Glass and align its rear left corner with the reference
marker on the Original Width Scale on the left side of
the platen. Then, lower the Original Cover.
2. Feeding two sheets of A3 or 11" × 17" paper from the
1st Drawer, make two full-size copies.
3. Check if dimension A (from the edge up to the
reference line) on the second copy is up to the
specifications.
1136D030AA

4. If dimension A deviates from the specifications, slide

out the 1st Drawer. Then, loosen the three screws
shown on the left and move the Drawer Positioning
Plate to the front or rear as necessary. (Use the same
procedure for the 2nd Drawer.)

Adjusting Instructions
• If dimension A on the copy is longer than 22 mm, move the Positioning Plate to the front of
the copier.
• If dimension A on the copy is shorter than 18 mm, move the Positioning Plate to the rear of
the copier.

5. After the adjustment, loosen the four screws shown on

the left and adjust the position (tilt) of the Drawer
Cover.

D-82
(10) Adjustment of the Leading Edge Registration
(Registration Adjustments Using Adjust Mode)
◆Requirement
• Dimension A on the copy of the GTC-test chart should
Dimension A
measure as follows at the respective zoom ratios.

1138D170AA

Zoom Ratio Specifications Adjustment Mode Setting Range

Adjust A4 = Lens
Full size (×1.000) 20 ±1.5 mm
Position Full Size
Adjust A11 = Lens
Enlargement (×2.000) 40 ±3.0 mm 40 to 60
Position Enlargement
Adjust A5 = Lens
Reduction (×0.500) 10 ±1.5 mm
Position Reduction

◆Important

This adjustment should be made after the "adjustment of zoom ratio in the feeding direction."

(1) Leading Edge Registration in Full Size Mode

1. Place the GTC-test chart face down on the Original

Glass and align its rear left corner with the reference
marker on the Original Width Scale on the left side of
the platen. Then, lower the Original Cover.
2. Make two single copies on A3 or 11" × 17" paper in
full size mode and check the second copy for leading
edge registration.
(If the registration is up to the specifications, go to the
adjustment in the enlargement mode. If it deviates
1136D033AA
from the specifications, perform the following steps to
make the adjustment of leading edge registration in
the full size mode.)

D-83
3. Call the "Adjust 1/2" menu to the screen.
4. Touch the select key [▼] or [▲] to highlight "A4 Lens Position Full Size."

Adjust Enter Adjust Enter

Adjust 1/2 Adjust 1/2

A0 Lens Focus 50 A0 Lens Focus 50

A1 Lens Full Size Position 50 A1 Lens Full Size Position 50
A2 Mirror Full Size Position 50 A2 Mirror Full Size Position 50
A3 Feed Direction Mag. Ratio 50 A3 Feed Direction Mag. Ratio 50
A4 Lens Position Full Size 50 A4 Lens Position Full Size 50
A5 Lens Position Reduction 50 A5 Lens Position Reduction 50

49-51 40-60

Next Next

1134D169CA 1134D170CA
▼

5. Touch the shift key [ ] or [ ] to change the setting value.

6. Touch [Enter] to validate the setting.

Setting Instructions
• If dimension A on the copy is longer than 21.5 mm, increase the setting value.
• If dimension A on the copy is shorter than 18.5 mm, decrease the setting value.

∗ If the measurement does not fall within the specifications through one setting, try another
setting.

Adjust Enter

Adjust 1/2

A0 Lens Focus 50
A1 Lens Full Size Position 50
A2 Mirror Full Size Position 50
A3 Feed Direction Mag. Ratio 50
A4 Lens Position Full Size 50
A5 Lens Position Reduction 50

40-60

Next

1134D171CA

Touch This Key if Measurement is Longer.

Touch This Key if Measurement is Shorter.

NOTE
Be sure to touch [Enter] before pressing the Panel Reset Key to return the copier to the normal
operating state. If this is not done, the old setting remains valid.

D-84
(2) Leading Edge Registration in Enlargement Mode
◆Important

This adjustment should be made after the "adjustment of leading edge registration in the full size
mode."

1. After the leading edge registration in the full size

mode has been adjusted, make two single copies on
A3 or 11" × 17" paper at ×2.000 and check the second
copy for leading edge registration.
(If the registration is up to the specifications, go to the
adjustment in the reduction mode. If it deviates from
the specifications, perform the following steps to make
the adjustment of leading edge registration in the
enlargement mode.)

2. With the "Adjust 1/2" menu on the screen, touch [Next] to show the "Adjust 2/2" menu.
3. Touch the select key [▼] or [▲] to highlight "A11 Lens Position Enlargement."

Adjust Enter Adjust BackUp Enter

Adjust 1/2 Adjust 2/2

A0 Lens Focus 50 A6 Book B-Scan Regist 50

A1 Lens Full Size Position 50
A2 Mirror Full Size Position 50 A11 Lens Position Enlargement 50
A3 Feed Direction Mag. Ratio 50 A12 Leading Edge Erase Adjust 50
A4 Lens Position Full Size 50 A13 Trailing Edge Erase Adjust 50
A5 Lens Position Reduction 50

49-51 40-60

Next

1134D172CA 1134D173CA

D-85
 ▼

▲
4. Touch the shift key [ ] or [ ] to change the setting value.
5. Touch [Enter] to validate the setting.

Setting Instructions
• If dimension A on the copy is longer than 43.0 mm, increase the setting value.
• If dimension A on the copy is shorter than 37.0 mm, decrease the setting value.

∗ If the measurement does not fall within the specifications through one setting, try another
setting.

Adjust BackUp Enter

Adjust 2/2

A6 Book B-Scan Regist 50

A11 Lens Position Enlargement 50

A12 Leading Edge Erase Adjust 50
A13 Trailing Edge Erase Adjust 50

40-60

1134D174CA

Touch This Key if Measurement is Longer.

Touch This Key if Measurement is Shorter.

NOTE
Be sure to touch [Enter] before pressing the Panel Reset Key to return the copier to the normal
operating state. If this is not done, the old setting remains valid.

D-86
(3) Leading Edge Registration in Reduction Mode
1. After the leading edge registration in the enlargement
mode has been adjusted, make two single copies on
A3 or 11" × 17" paper at ×0.500 and check the second
copy for leading edge registration.
(If the registration deviates from the specifications,
perform the following steps to make the adjustment of
leading edge registration in the reduction mode.)

◆Important

This adjustment should be made after the "adjustment of leading edge registration in the full size
mode."

2. Call the "Adjust 1/2" menu to the screen.

3. Touch the select key [▼] or [▲] to highlight "A5 Lens Position Reduction."

Adjust Enter Adjust Enter

Adjust 1/2 Adjust 1/2

A0 Lens Focus 50 A0 Lens Focus 50

A1 Lens Full Size Position 50 A1 Lens Full Size Position 50
A2 Mirror Full Size Position 50 A2 Mirror Full Size Position 50
A3 Feed Direction Mag. Ratio 50 A3 Feed Direction Mag. Ratio 50
A4 Lens Position Full Size 50 A4 Lens Position Full Size 50
A5 Lens Position Reduction 50 A5 Lens Position Reduction 50

49-51 40-60

Next Next

1134D175CA 1134D176CB

D-87
 ▼

▲
4. Touch the shift key [ ] or [ ] to change the setting value.
5. Touch [Enter] to validate the setting.

Setting Instructions
• If dimension A on the copy is longer than 11.5 mm, increase the setting value.
• If dimension A on the copy is shorter than 8.5 mm, decrease the setting value.

∗ If the measurement does not fall within the specifications through one setting, try another
setting.

Adjust Enter

Adjust 1/2

A0 Lens Focus 50
A1 Lens Full Size Position 50
A2 Mirror Full Size Position 50
A3 Feed Direction Mag. Ratio 50
A4 Lens Position Full Size 50
A5 Lens Position Reduction 50

49-51

Next

1134D177CB

Touch This Key if Measurement is Longer.

Touch This Key if Measurement is Shorter.

NOTE
Be sure to touch [Enter] before pressing the Panel Reset Key to return the copier to the normal
operating state. If this is not done, the old setting remains valid.

D-88
(11) Adjustment of the Leading Edge Registration for Book Second
Page
◆Requirement
• Dimension A on the copy of a test chart (A3 or 11" ×
17") as shown on the left should measure 20 ±3.0 mm
and B equals C.
• Setting range: 45 to 55

1136D036AA

◆Important

This adjustment should be made after the "adjustment of the leading edge registration."

1. Place the test chart face down on the Original Glass

and align its rear left corner with the reference marker
on the Original Width Scale on the left side of the
platen. Then, lower the Original Cover.

1136D037AA

2. On the Basic screen, touch [Auxiliary]. Then, on the Auxiliary function menu screen, touch
[Book Copy] to set the copier into the Book mode.

Auxiliary Finishing Orig. Copy Basics Auxiliary Finishing Orig. Copy Basics

Ready to copy. Ready to copy.

1 1
Auto Expo. x1.000 Auto Paper Auto Expo. x1.000 Auto Paper

Cover OHP Inter- File

leaving Margin
Exposure Zoom Paper
Page book Edge/Frame
Insertion copy Erase

1134D188CB 1134D189CB

3. Select the [1-Sided] Copy and make two single copies on A4 crosswise paper. Check the
second copy for the leading edge registration of the second page. (If the dimension deviates
from the specifications, perform the following steps to make the adjustment of leading edge
registration for the second page.)

Book Copy Cancel Enter

Original Copy
Std. Book 1-Sided
1 2 1 2

R Bound 2-Sided
2 1 1
2

1134P299CB

D-89
 4. With the "Adjust 1/2" menu on the screen, touch [Next] to show the "Adjust 2/2" menu. Then,
highlight "A6 Book B-Scan Regist."

Adjust Enter Adjust BackUp Enter

Adjust 1/2 Adjust 2/2

A0 Lens Focus 50 A6 Book B-Scan Regist 50

A1 Lens Full Size Position 50
A2 Mirror Full Size Position 50 A11 Lens Position Enlargement 50
A3 Feed Direction Mag. Ratio 50 A12 Leading Edge Erase Adjust 50
A4 Lens Position Full Size 50 A13 Trailing Edge Erase Adjust 50
A5 Lens Position Reduction 50

49-51 45-55

Next

1134D178CA 1134D179CA
▲

5. Touch the shift key [ ] or [ ] to change the setting value.

6. Touch [Enter] to validate the setting.

Setting Instructions
• If dimension A on the copy is longer than 23 mm, increase the setting value.
• If dimension A on the copy is shorter than 17 mm, decrease the setting value.

∗ If the measurement does not fall within the specifications through one setting, try another
setting.

Adjust BackUp Enter

Adjust 2/2

A6 Book B-Scan Regist 50

A11 Lens Position Enlargement 50

A12 Leading Edge Erase Adjust 50
A13 Trailing Edge Erase Adjust 50

45-55

1134D180CA

Touch This Key if Measurement is Longer.

Touch This Key if Measurement is Shorter.

NOTE
Be sure to touch [Enter] before pressing the Panel Reset Key to return the copier to the normal
operating state. If this is not done, the old setting remains valid.

D-90
(12) Adjustment of the Image Leading Edge Erase Width
◆Requirement

• The erase width, dimension A, on the copy of the

Dimension A
GTC-test chart should measure 1.0 to 6.5 mm.
• Setting range: 45 to 55

◆Important

This adjustment should be made after the "adjustment of the leading edge registration" and
"adjustment of the leading edge registration for book second page."

1. Place the GTC-test chart face down on the Original

Glass and align its rear left corner with the reference
marker on the Original Width Scale on the left side of
the platen. Then, lower the Original Cover.

2. Make two single copies on A3 or 11" × 17" paper in

full size mode and check the second copy for leading
edge erase width.
(If the erase width deviates from the specifications,
1136D040AA
perform the following steps to make the adjustment of
image leading edge erase width.)

3. With the "Adjust 1/2" menu on the screen, touch [Next] to show the "Adjust 2/2" menu.
4. Touch the select key [ ▼ ] or [ ▲ ] to highlight "A12 Leading Edge Erase Adjust."

Adjust Enter Adjust BackUp Enter

Adjust 1/2 Adjust 2/2

A0 Lens Focus 50 A6 Book B-Scan Regist 50

A1 Lens Full Size Position 50
A2 Mirror Full Size Position 50 A11 Lens Position Enlargement 50
A3 Feed Direction Mag. Ratio 50 A12 Leading Edge Erase Adjust 50
A4 Lens Position Full Size 50 A13 Trailing Edge Erase Adjust 50
A5 Lens Position Reduction 50

49-51 45-55

Next

1134D181CA 1134D182CA

D-91
 ▲

▼
5. Touch the shift key [ ] or [ ] to change the setting value.
6. Touch [Enter] to validate the setting.

Setting Instructions
• If dimension A on the copy is longer than 6.5 mm, decrease the setting value.
• If dimension A on the copy is shorter than 1.0 mm, increase the setting value.

∗ If the measurement does not fall within the specifications through one setting, try another
setting.

Adjust BackUp Enter

Adjust 2/2

A6 Book B-Scan Regist 50

A11 Lens Position Enlargement 50

A12 Leading Edge Erase Adjust 50
A13 Trailing Edge Erase Adjust 50

45-55

1134D183CA

Touch This Key if Measurement is Shorter.

Touch This Key if Measurement is Longer.

NOTE
Be sure to touch [Enter] before pressing the Panel Reset Key to return the copier to the normal
operating state. If this is not done, the old setting remains valid.

D-92
(13) Adjustment of the Image Trailing Edge Erase Width
◆Requirement

• The erase width, dimension A, on the copy of the

GTC-test chart should measure 0.5 to 5.5 mm.
• Setting range: 42 to 58

Dimension A

◆Important

• This adjustment should be made after the "adjustment of the image leading edge erase width."
• Before this adjustment can be made, "Trailing Edge Erase" on the "Tech. Rep. Choice 2" screen
must be set to "Yes."

1. Place the GTC-test chart face down on the Original

Glass and align its rear left corner with the reference
marker on the Original Width Scale on the left side of
the platen. Then, lower the Original Cover.

2. Make two single copies on A3 or 11" × 17" paper in

full size mode and check the second copy for trailing
edge erase width.
(If the erase width deviates from the specifications,
1136D042AA
perform the following steps to make the adjustment of
image trailing edge erase width.)

3. With the "Adjust 1/2" menu on the screen, touch [Next] to show the "Adjust 2/2" menu.
4. Touch the select key [ ▼ ] or [ ▲ ] to highlight "A13 Trailing Edge Erase Adjust."

Adjust Enter Adjust BackUp Enter

Adjust 1/2 Adjust 2/2

A0 Lens Focus 50 A6 Book B-Scan Regist 50
A1 Lens Full Size Position 50
A2 Mirror Full Size Position 50 A11 Lens Position Enlargement 50
A3 Feed Direction Mag. Ratio 50 A12 Leading Edge Erase Adjust 50
A4 Lens Position Full Size 50 A13 Trailing Edge Erase Adjust 50
A5 Lens Position Reduction 50

49-51 42-58

Next

1134D184CA 1134D185CA

D-93
 ▲

▼
5. Touch the shift key [ ] or [ ] to change the setting value.
6. Touch [Enter] to validate the setting.

Setting Instructions
• If dimension A on the copy is longer than 5.5 mm, decrease the setting value.
• If dimension A on the copy is shorter than 0.5 mm, increase the setting value.

∗ If the measurement does not fall within the specifications through one setting, try another
setting.

Adjust BackUp Enter

Adjust 2/2
A6 Book B-Scan Regist 50

A11 Lens Position Enlargement 50

A12 Leading Edge Erase Adjust 50
A13 Trailing Edge Erase Adjust 50

42-58

1134D186CA

Touch This Key if Measurement is Shorter.

Touch This Key if Measurement is Longer.

NOTE
Be sure to touch [Enter] before pressing the Panel Reset Key to return the copier to the normal
operating state. If this is not done, the old setting remains valid.

D-94
(14) Adjustment of Edge Erase
◆Requirement

• Dimension A, which is the erase width from the front

edge on the copy of the GTC-test chart, should be in the
range between 0.5 mm and 3.0 mm.

1136D043AA

◆Important

This adjustment must be made after the "adjustments of reference positions."

1. Place the GTC-test chart face down on the Original

Glass and align its rear left corner with the reference
marker on the Original Width Scale on the left side of
the platen. Then, lower the Original Cover.
2. Make a single copy on A3 or 11" × 17" paper in full
size mode.
* If A3 or 11" × 17" paper is not available, use A4 or
8-1/2" × 11" crosswise paper.
1136D044AA

3. If the front edge erase width deviates from the

specifications, adjust as necessary by turning the
Edge Erase Adjusting Screw.

Adjusting Instructions
• If dimension A on the copy (of the original width of
3.0 mm) is narrower than 0.5 mm, tighten the
Adjusting Screw.
1134D114AA • If dimension A on the copy (of the original width of
3.0 mm) is wider than 3.0 mm, loosen the Adjusting
Screw.

D-95
3-7. OTHER ADJUSTMENTS

(1) Focus-Positioning of the Scanner and Mirrors Carriage

◆ Requirement
• With the Scanner positioned correctly with reference to the Scanner Drive Cable, there should
be no gap between one end of the Scanner/Mirrors Carriage Positioning Jig and the Scanner,
and between the other end of the jig and the Mirrors Carriage. The distance between the
Scanner and Mirrors Carriage should be 83.5 mm.

1. Remove the Original Cover, Upper Rear Cover, and

Original Glass.
2. Slide the Scanner to a position at which the hole in the
rear of the upper copier frame is aligned with the
Scanner Positioning Screw.
3. Insert a screwdriver into the hole in the rear of the
upper copier frame and loosen the Scanner
Positioning Screw. (This allows the Scanner Drive
Cable to move independently of the Scanner.)

Scanner Positioning Jig 4. Align the rectangular hole in the upper copier frame
with the U-groove in the Scanner. Insert the Scanner
Positioning Jig.

5. Install the Scanner/Mirrors Carriage Positioning Jig

between the Scanner and the Mirrors Carriage.

Scanner/Mirrors
Carriage Positioning
Jig

6. Move the Mirrors Carriage in the direction of the arrow.

7. Check that both ends of the Scanner/Mirrors Carriage
83.5 mm Positioning Jig have no gap.

D-96
8. Tighten the Scanner Positioning Screw which has
been loosened in step 3.

D-97
(2) Adjustment of the Gap Between the Doctor Blade and Sleeve Roller
(D.B. Adjustment)
◆ Requirement
• The gap between the Doctor Blade and Sleeve Roller should be 0.53 ±0.01 mm.
1. Remove the PC Unit, PC Drum Charge Corona, and
PC Drum.
2. Remove two screws and the Developer Scattering
Prevention Plate.

3. Using a brush, whisk developer off the surface of the

Sleeve Roller.

4. Install the Sleeve/Magnet Roller Positioning Jig into

the PC Unit.

5. Loosen three screws that secure the Doctor Blade.

Insert the D.B. Adjusting Jigs between the Doctor
Blade and Sleeve Roller.
6. Press down the Doctor Blade until it positively
contacts the D.B. Adjusting Jigs. Then, tighten the
three screws to secure the Doctor Blade.

D-98
(3) Adjustment of the PC Drum Paper Separator Finger Position
◆ Requirement
• The gap between the PC Drum and Paper Separator Fingers should be 1.0 ±0.5 mm when
Separator Solenoid SL5 is in the deenergized position.

◆ Important
• Use care not to deform the Separator Fingers during the adjustment procedure.
1. Attach the PC Drum Paper Separator Finger
Positioning Jig to the PC Unit.

1136D053AA

2. Using an Allen wrench, adjust the position of one of

the two Paper Separator Fingers. (Either one will do.)

Adjusting Instructions
• With the solenoid in the deenergized position, the
tip of the finger should be at a point between A and
B, preferably more on the B end.
• With the solenoid energized, the tip of the finger
should touch C.
A ............. 41.5 mm
B ............. 40.5 mm
C ............. 40.0 mm

1136D055AA

3. After this adjustment, check that the other finger also

meets the above requirement.

NOTE
If the fingers cannot be positioned correctly through
steps 2 and 3, loosen the two solenoid mounting
screws and adjust the position of the solenoid. Then,
repeat steps 2 and 3.
1136D056AA

D-99
(4) Adjustment of Manual Feed Paper Take-Up Solenoid SL4
1. Remove the SL4 mounting bracket. (For the removal
steps, see p. D-27.)
2. Manually bring SL4 into the energized position
(plunger pushed in).
* A click is heard when the solenoid is energized.
Then, hold the plunger in position.

3. Loosen two screws that secure the SL4 and slide SL4
all the way in the direction of the arrow.

4. Slowly move the SL4 in the direction opposite that in step 3. When the two Stoppers just
swing into the upright position, tighten the two SL4 mounting screws.

D-100
(5) Adjustment of Exit/Duplex Solenoid SL5
◆ Requirement
• With the lever in contact with the stopper (SL5 in the deenergized position), the gap between the
plunger E-ring stopper and the solenoid should be 4.0 to 4.5 mm.

◆ Important
• After the adjustment, move the plunger manually to check that it moves smoothly and the
Switching Plate swings up and down properly.

1. Open the Left Door.

2. Loosen two screws that secure the SL5.

3. Bring the lever into contact with the stopper. Keeping that position, move the SL5 so that the
gap between the plunger E-ring stopper and solenoid measures 4.0 to 4.5 mm. When the
specified dimension is reached, tighten the two SL5 mounting screws.

D-101
 4 MISCELLANEOUS
4-1. Installation of the Plug-In Counter (Option) Mounting Bracket
1. Open the Right Door.
2. Remove the harness from the cord clamp.
3. Unplug three connectors.

4. Remove two screws and the Right Door.

5. Remove the Counter Cover.

6. Remove four screws and the Right Cover.

7. Remove the PC Unit.

8. Remove two screws and the cover.

1136D061AA

9. Connect the Plug-In Counter connector.

10. Secure the Plug-In Counter Mounting Bracket with the
two screws.

NOTE
When the Plug-In Counter is mounted, be sure to
turn "ON" the "Plug-In Counter" of "System Input"
available from the Tech. Rep. mode.
1136D062AA

D-102
4-2. ADJUSTMENT OF THE RIGHT DOOR
If the Right Door has been removed and reinstalled, the position of the actuator of Right Upper
Door Interlock Switch S22 may deviate from the correct position. Hence, the necessity of the
following adjustment.

1. Mount the Right Door with two screws. (At this time,
only temporarily tighten these screws.)

2. Lightly close the Right Door so that the S22 actuator

will not contact the frame.

1134D116AA

3. Due to its own weight, the front end of Right Door

tends hang lower. Lifting the front end slightly, tighten
the two mounting screws.

4. Open and close the Right Door two to three times to

check that the S22 actuator properly actuates and
deactuates S22.

1134D118AA

D-103
 Copyright
1994 MINOLTA CO., LTD
Printed in Japan

Use of this manual should

be strictly supervised to
avoid disclosure of
confidential information.

MINOLTA CO., LTD. 1134-7992-11 94085550

Printed in Japan
 EP3050/EP4050

SWITCHES ON PWBs,
TECH. REP. MODE
 CONTENTS
1 PRECAUTIONS FOR HANDLING THE PWBs

1-1. Precautions for Transportation and Storage . . . . . . . . . . . . . . . . S-1

1-2. Precautions for Replacement/Inspection . . . . . . . . . . . . . . . . . . . S-1

2 FUNCTIONS OF SWITCHES AND VARIABLE RESISTORS ON PWBs

2-1. PWB Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-2

2-2. Master Board (PWB-A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-2
2-3. Power Supply Board (PWB-C) . . . . . . . . . . . . . . . . . . . . . . . . . . . S-3
2-4. Tech. Rep. Settings Switches Board (PWB-I) . . . . . . . . . . . . . . . S-4

3 USER’S CHOICE MODE

3-1. User’s Choice Mode Menu Screen . . . . . . . . . . . . . . . . . . . . . . . . S-6

3-2. User’s Choice Mode Setting Procedure . . . . . . . . . . . . . . . . . . . . S-7
3-3. Settings in the User’s Choice Mode . . . . . . . . . . . . . . . . . . . . . . . S-7
3-3-1. Menu screen 1/6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-7
3-3-2. Menu screen 2/6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-8
3-3-3. Menu screen 3/6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-10
3-3-4. Menu screen 4/6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-12
3-3-5. Menu screen 5/6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-13
3-3-6. Menu screen 6/6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-16

4 TECH. REP. MODE

4-1. Tech. Rep. Mode Menu Screen . . . . . . . . . . . . . . . . . . . . . . . . . S-18

4-2. Tech. Rep. Mode Setting Procedure . . . . . . . . . . . . . . . . . . . . . S-18
4-3. Settings in the Tech. Rep. Mode . . . . . . . . . . . . . . . . . . . . . . . . S-19
1. Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-19
1-1. Function mode setting procedure . . . . . . . . . . . . . . . . . . S-19
1-2. Settings in the Function mode . . . . . . . . . . . . . . . . . . . . S-19
1-3. Components energized in the Function mode . . . . . . . . S-21
2. Tech. Rep. Choice. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-22
2-1. Tech. Rep. Choice mode setting procedure . . . . . . . . . S-22
2-2. Settings in the Tech. Rep. Choice mode . . . . . . . . . . . . S-22
3. System Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-28
3-1. System Setting setting procedure. . . . . . . . . . . . . . . . . . S-28
3-2. Settings in the System Setting mode . . . . . . . . . . . . . . . S-28

i
 CONTENTS
4. Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-30
4-1. Counter setting procedure. . . . . . . . . . . . . . . . . . . . . . . . S-30
4-2. Settings in the Counter mode . . . . . . . . . . . . . . . . . . . . . S-30
5. I/O Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-39
5-1. I/O Check setting procedure . . . . . . . . . . . . . . . . . . . . . . S-39
5-2. Settings in the I/O Check mode . . . . . . . . . . . . . . . . . . . S-39
6. Last Trouble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-46
7. ROM Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-47
8. RD Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-48
8-1. Settings in the RD mode . . . . . . . . . . . . . . . . . . . . . . . . . S-48
9. ADF Check/Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-51
9-1. ADF Check/Setting setting procedure . . . . . . . . . . . . . . S-51
9-2. Settings in the ADF Check/Setting mode. . . . . . . . . . . . S-51
10. Level History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-55
11. Machine Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-56
12. Administrator Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-57

5 ADJUST MODE

5-1. Adjust Mode Screens. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-58

5-2. Adjust Mode Setting Procedure . . . . . . . . . . . . . . . . . . . . . . . . . S-58
5-3. Settings in the Adjust Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-59

6 LIST OF SETTINGS TO BE MADE DUE TO PARTS

. . . .REPLACEMENT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .S-65

ii
 1 PRECAUTIONS FOR HANDLING THE PWBs
1-1. Precautions for Transportation and Storage
a) Before transporting or storing the PWBs, put them in protective conductive cases or bags so that
they are not subjected to high temperature (they are not exposed to direct sunlight.)
b) Protect the PWBs from any external force so that they are not bent or damaged.
c) Once the PWB has been removed from its conductive case or bag, never place it directly on an
object that is easily charged with static electricity (carpet, plastic bags, etc.).
d) Do not touch the parts and printed patterns on the PWBs with bare hands.

1-2. Precautions for Replacement/Inspection

a) Whenever replacing the PWB, make sure that the power cord of the copier has been unplugged.
b) When the power is on, the connectors must not be plugged in or unplugged.
c) Use care not to strap the pins of an IC with a metal tool.
d) When touching the PWB, wear a wrist strap and connect its cord to a securely grounded place
whenever possible. If you cannot wear a wrist strap, touch the metal part before touching the
PWB to discharge static electricity.

S-1
 2 FUNCTIONS OF SWITCHES AND VARIABLE RESISTORS ON PWBs
2-1. PWB Locations

2-2. Master Board (PWB-A)

S-2
 Symbol Name Description
S1A-1 Vacant (Not used) Vacant (Not used)
When the Paper Feed Cabinet is fitted to the
copier, set this switch to the required position
according to the capacity of the Toner
Collection Box.

Paper Feed Collection

S1A-2 Toner Collection Box Select Switch S1A-2
Cabinet Capacity
Not fitted 80 K ON
Fitted 180 K OFF

Initial setting = OFF

VR1A DC4.7V Adjusting Variable Resistor For factory setting. Must not be used.
LD1A Power Voltage Checking LED For visual check on the DC5V output.
LD2A Power Voltage Checking LED For visual check on the DC24V output.

2-3. Power Supply Board (PWB-C)

• When the DT-103 is fitted to the copier, this switch is used to keep the power (DC5V) supplied to
the DT-103 if the Power Switch is turned OFF.

S1C Description Initial Setting

Position A DC5V is shut off when the Power Switch is turned OFF. ∗
Position B DC5V is supplied if the Power Switch is turned OFF.

S-3
2-4. Tech. Rep. Settings Switches Board (PWB-I)

Symbol Name Description

Trouble Reset Switch Used to reset trouble related to Exposure
S1 Lamp malfunction (C04XX) and Fusing
malfunction (C05XX).
VR1 Contrast Adjusting Variable Resistor Used to adjust the contrast of the Display.
Initialize Points Used to forcibly reset a jam/trouble that
occurred due to incorrect operation, etc.
PJ2
when it cannot be reset by opening and
closing the Front Door or pressing S1.
TP1 GND Test Point Ground used for memory clear.
Memory Clear Test Point Used to clear data other than all values
TP2
counted by the Electronic Counters.

S-4
<Point Clearing Procedure>
• Initialize Points (PJ2)
1. Turn the Power Switch OFF.
2. With the PJ2I points (1, 2) shorted, turn the Power Switch ON.
• Memory Clear Test Point (TP2)
1. Turn the Power Switch OFF.
2. With the TP1 and TP2 points shorted, turn the Power Switch ON.

NOTES
• When incorrect display/incorrect operation has occurred, reset and clear it in the following
sequence:
Initialize Points (PJ2) → Memory clear Test Point (TP2)
• When memory has been cleared, each mode must be set again (see below).

<List of Data Cleared by the Switch and Points>

Clearing Method Memory

Front Door Trouble Reset Initialize
Clear Test
Open/Close Switch S1 Points PJ2
Data Cleared Point TP2
Jam display O — O —
Trouble display
O — O —
(other than Exposure/Fusing)
Trouble display
— O O —
(Exposure/Fusing only)
Incorrect display/incorrect operation — — O O
Copy mode program — — — O
User’s choice — — — O
Tech. Rep. choice — — — O
F5/F7 setting — — — O
System setting — — — O
ADF setting — — — O
Level history — — — O
RD mode setting — — — O
Admin. mode — — — O
Adjust mode — — — O

O: Cleared. —: Not cleared.

Note: When memory has been cleared, "Level History" must be selected and the required value
entered into "ATDC Set".

S-5
 3 USER’S CHOICE MODE
• This mode is used by the user to make various settings according to user requirements.

3-1. User’s Choice Mode Menu Screen

• Select the User Mode key on the control panel.

User Mode Exit

Select a function by pressing the

key.

Data Send

Job Memory Zoom Mem- Meter

Input ory Input Count

Toner Re- Drum De- User's

Plenisher humidifier Choice

1134P359CA

• From among the modes displayed, select User’s Choice to enter the User’s Choice mode.
• The User’s Choice mode has a total of six screens. Press any of 1/6, 2/6, 3/6, 4/6, 5/6 and 6/6 to
switch to the required menu screen as described below.

Note: "The selection Data Send" is displayed only when the copier is fitted with the DT-103.

3-2. User’s Choice Mode Setting Procedure

<Setting Procedure>
1. Press the User Mode key on the control panel.
2. Select the desired menu screen from among 1/6, 2/6, 3/6, 4/6, 5/6 and 6/6 displayed at the
bottom of the screen.
3. On the menu screen selected, select the mode to be set and make settings as required.
4. After the settings are complete, press the "Enter" key to enter the settings.
Note: The mode selected is highlighted.

<Leving the Mode>

Perform any one of the following steps.
• Press the Panel Reset Key.
• Press "Exit" on the screen.

S-6
3-3. Settings in the User’s Choice Mode
3-3-1. Menu screen 1/6

User's Choice 1/6 Exit

Select a key to change settings, or

press Pg.# key for additional menu.

Mixed Orig. Detection: OFF

Language Selection: English

Paper Priority: Letter /1

Copy Mode Priority: Auto Size

1/6 2/6 3/6 4/6 5/6 6/6

1134P368EA
1. Mixed Original Detection mode
Used to select "Mixed Original Detection" or "High Speed".
Mixed Orig. Detection ON: APS/AMS is performed for all originals loaded in the
Automatic/Duplexing Document Feeder. (A paper size that can be
loaded both lengthwise and crosswise is acceptable.)
Mixed Orig. Detection OFF: APS/AMS is performed for only the first sheet of paper loaded in the
Automatic/Duplexing Document Feeder.

Screen Display Description Initial Setting

ON Mixed Original Detection enabled (High speed mode disabled)
OFF Mixed Original Detection disabled (High speed mode enabled) ∗

2. Language Selection
Used to specify the language to be displayed on the screen according to the user or area.
<USA/Canada Area>

Initial
Screen Display
Setting
English ∗
French
Spanish
Portuguese

<Europe Area>
Type A Type B Type C

Initial Initial Initial

Screen Display Screen Display Screen Display
Setting Setting Setting
German ∗ Italian ∗ Danish ∗
English Spanish Norwegian
French Portuguese Swedish
Dutch English English

S-7
3. Paper Priority
Used to select the paper in the priority paper source in the AMS or Manual Mode.

Paper Source Initial Setting Paper Source Paper Feed Option Initial Setting
1st Drawer ∗ 3rd Drawer Can be exchanged for the
PF-102/PF-202/PF-2D
2nd Drawer
4th Drawer Paper Feed Cabinet.

Can be exchanged for the

5th Drawer
AD-5.
C-301 Large Capacity Cassette

4. Copy Mode Priority

Used to select the Auto Mode which is given priority when the Power Switch is turned ON or Panel
Reset Key pressed.

Screen Display Initial Setting

Auto Paper ∗
Auto Size
Manual

3-3-2. Menu screen 2/6

User's Choice 2/6 Exit

Select a key to change settings, or

press Pg.# key for additional menu.

Expo. Mode Priority: Auto

Expo. Level Priority: Normal

Manual Expo. Adjust: Mode 1

Finishing Priority Non Sort

1/6 2/6 3/6 4/6 5/6 6/6

1134P370CA
1. Exposure Mode Priority
Used to select the Exposure mode which is given priority when the Power Switch is turned ON or
Panel Reset Key pressed.

Screen Display Initial Setting

Auto ∗
Manual

S-8
2. Exposure Level Priority
• Used to select the auto exposure level in the Auto Exposure mode.
• Used to select the manual exposure level when the Auto Exposure mode has been switched to
the Manual Exposure mode.
<Auto Exposure Level Setting>

Screen Display Description Initial Setting

Lighter Equivalent to EXP. 4.5
Normal Equivalent to EXP. 5.0 ∗
Darker Equivalent to EXP. 5.5

<Manual Exposure Level Setting>

Description Initial Setting Description Initial Setting
EXP. 1 EXP. 6
EXP. 2 EXP. 7
EXP. 3 EXP. 8
EXP. 4 EXP. 9
EXP. 5 ∗ Note: EXP. 1: Lightest
EXP. 9: Darkest

3. Manual Exposure Adjustment

Used to select the exposure voltage level in the Manual Exposure mode according to the type of the
original used.

Screen Display Description Initial Setting

Mode 1 Ordinary/photo originals ∗
Mode 2 Originals other than in Modes 1 and 3
Mode 3 Colored originals

<List of Manual Exposure Voltages Based on Modes>

Manual Exposure Voltage (V)
EXP. 1 2 3 4 5 6 7 8 9
Mode 1 +8 +5 +3 +1 0 −1 −3 −5 −8
Mode Mode 2 +8 +6 +5 +3 0 −2 −4 −6 −8
Mode 3 +8 +7 +6 +4 0 −3 −5 −7 −8

Note: EXP. 5 is a voltage value adjusted automatically in the "F5" mode.

S-9
4. Priority Sort
Used to select the priority exit mode when the copier is fitted with an exit option.

Screen Display Initial Setting

Non Sort ∗
Sort
Sort & Staple
Group

3-3-3. Menu screen 3/6

User's Choice Exit

Select a key to change setting, or

press Pg.# Key for additional menu.
Auto Panel Reset: 1min.

Energy Saver Mode: OFF

Drum Dehumidifier: OFF

Counter Removal: ON

1/6 2/6 3/6 4/6 5/6 6/6

1134S029CA

1. Auto Panel Reset

Used to select "the Reset Timing" or "No Reset" to the initial mode at the end of a copy cycle or a
given period of time after the final key is pressed.

Screen Display Initial Setting

1 min. ∗
2 min.
3 min.
5 min.
No Reset

S-10
2. Energy Saver Mode
Used to turn "ON" or "OFF" the Energy Saver Mode. Set the time for this Mode when "ON" is
selected.

Description Initial setting

1 to 10 min.
OFF ∗

<Procedure>
• To select "ON", enter the required value from the 10-key pad. When the value entered is wrong,
press the Clear Key to clear the value to zero. Then, enter a correct value.
• To select "OFF", press "OFF" on the screen.

3. Drum Dehumidifier
Used to turn "ON" or "OFF" the Drum Dehumidifier when the Power Switch is turned ON.

Screen Display Initial Setting

ON (Auto)
OFF ∗

4. Counter Removal
Used to turn "ON" or "OFF" the reset function when the Plug-In Counter/Magnetic Card (D-102) is
pulled out.

Screen Display Description Initial Setting

ON Reset to the initial mode. ∗
OFF Not reset to the initial mode.

S-11
3-3-4. Menu screen 4/6

User's Choice Exit

Select a key to change setting, or

press Pg.# Key for additional menu.
Intelligent Sort: ON

Confirmation Beep: ON

Original Thickness: Standard

Smaller Originals: EnableCopy

1/6 2/6 3/6 4/6 5/6 6/6

1134S030CA

1. Intelligent Sort
Used to turn "ON" or "OFF" the Intelligent Sort function (which automatically switches between Sort
and Non Sort according to the number of documents) when a paper exit option is fitted to the copier
and used with an Automatic/Duplexing Document Feeder.
<When set to ON>
• When the number of documents is 1, Non Sort is selected.
• When the number of documents is 2 or more, Sort is selected.

Screen Display Description Initial Setting

ON Switched automatically. ∗
OFF Not switched automatically.

Note: The Intelligent Sort mode functions when APS/AMS is selected with the Intelligent Sort mode
set to "ON" and the "Mixed Orig. Detection" set to "OFF (high speed)".

2. Confirmation Beep
Used to turn "ON" or "OFF" the Confirmation Beep when any of the keys on the control panel or the
Mode Keys on the screen is pressed.

Screen Display Description Initial Setting

ON Beep sounds. ∗
NO Beep does not sound.

3. Original Thickness
Used to select between bringing and not bringing originals fed by the Automatic/Duplexing
Document Feeder to a stop against the Original Scale.

Screen Display Description Initial Setting

Stopped against the Original
Standard
Scale.
∗
Not stopped against the Original
Thin
Scale.

S-12
4. Smaller Originals
Used to turn "ON" or "OFF" the copying of originals of the minimum detectable size (less than A5
lengthwise).

Screen Display Description Initial Setting

Originals are copied onto paper
ON fed through the priority paper ∗1
source.
Warning is displayed and copying
OFF
is disabled.
∗2

∗1: Europe Area, ∗2: USA/Canada Area

3-3-5. Menu screen 5/6

User's Choice Exit

Select a key to change setting, or

press Pg.# Key for additional menu.
Custom 2in1:

Custom 2in1 Separation:

Custom Book Copy:

Special Paper:

1/6 2/6 3/6 4/6 5/6 6/6

1134S031CA

1. Custom 2-in-1
Used to specify the priority modes (Paper, Zoom, Margin, Erase) when 2-in-1 is selected.

Mode Description Initial Setting

Paper Auto paper/select a give drawer Auto paper
Zoom Fixed zoom ratio ×0.707
Position : Right side/left side
Margin Mode : Full size (shift)/reduction No setting
Width : 10 mm/15 mm/20 mm
Position : Right side/left side/frame erase/upper side
Erase (feeding direction)/center No setting
Width : 10 mm/15 mm/20 mm

Note: When the erase position is set to the frame erase or upper side (feeding direction), the erase
width is automatically fixed at 10 mm.

S-13
2. Custom 2-in-1 Separation
Used to specify the priority modes (Paper, Zoom, Margin, Erase) when 2-in-1 Separation is selected.

Mode Description Initial Setting

Paper Auto paper/select a give drawer Auto paper
Zoom Fixed zoom ratio ×1.414
Position : Right side/left side
Margin Mode : Full size (shift)/reduction No setting
Width : 10 mm/15 mm/20 mm
Position : Right side/left side/frame erase/upper side
Erase (feeding direction)/center No setting
Width : 10 mm/15 mm/20 mm

Note: When the erase position is set to the frame erase or upper side (feeding direction), the erase
width is automatically fixed at 10 mm.

3. Custom Book Copy

Used to specify the priority modes (Paper, Zoom, Margin, Erase) when Book Copy is selected.

Mode Description Initial Setting

Paper Select a give drawer 1st Drawer
Zoom Fixed zoom ratio ×1.000
Position : Right side/left side
Margin Mode : Full size (shift) No setting
Width : 10 mm/15 mm/20 mm
Position : Right side/left side/frame erase/upper side
Erase (feeding direction)/center No setting
Width : 10 mm/15 mm/20 mm

Note: When the erase position is set to the frame erase or upper side (feeding direction), the erase
width is automatically fixed at 10 mm.

S-14
4. Special Paper
Used to specify the type of paper loaded in each paper source.

Screen Display
S0: Normal
S1: Recycled
S2: Insert Paper
S3: Not for 2-Sided The initial settings are all S0.

<Procedure>
• Select the paper source to be set and press the key on the screen to change the displayed paper
type as shown below:

S0 S1 S2 S3

<APS/Automatic Paper Source Switching Operation>

Automatic Paper Source Switching

Special Paper APS
(Paper of the same type only)
S0: Normal O O
S1: Recycled O Note 1 O
S2: Insert Paper — —
S3: Not for 2-Sided O Note 2 O Note 2

O: Functions.
—: Does not function.

Note 1: A warning is displayed and a copy cycle is started by pressing the Start Key.
Note 2: Automatic switching is performed only in the 1-sided copy mode.

S-15
3-3-6. Menu screen 6/6

User's Choice Exit

Select a key to change setting, or

press Pg.# Key for additional menu.
CopyTrack: OFF

User Help:

Max. Copy Sets: OFF

1/6 2/6 3/6 4/6 5/6 6/6

1134S032CA

1. Copy Track
Used to turn "ON" or "OFF" the Copy Track function per account (max. 26 accounts).

Screen Display Description Initial Setting

ON Copy Track is made.
OFF Copy Track is not made. ∗

<When ON is selected>
When the Access # is set by the administrator for each account, the number of copy cycles per
account is monitored. (A simple form of the D-102 function is provided.)

User's Choice

For each Account #, you can assign/

change Access # or reset counters.

CopyTrack Enter Exit

Account #
18
Access #
1234

Total Count Size Count

148839 478

1134S033CA

<Setting Procedure>
1. Select "ON" and press the "Enter" Key.
2. Press the ▼ / ▲ key to access the Account # to be administrated. (Max. 26 accounts)
3. Press the Access # key and register the access number corresponding to the above Account #
from the 10-key pad. (Max. 4 digits)
Note: If the access number has been changed or the number entered is wrong, press the Clear Key
to clear the number and re-enter.
4. Press the "Enter" Key to enter the access number.
Note: When a copy is to be made after the access number has been entered, the access number
must be entered and the Access # Key pressed to enter the copy mode.
<Counter Clearing Method>
• Select the counter to be cleared and press the Clear Key.

S-16
2. User Help
When the user sends a User Help code according to the status of the copier fitted with the DT-103,
this function transmits that status to the center.

<Setting Procedure>
• Enter a 3-digit value from the 10-key pad (max. six codes).
Note: To transmit the User Help code, enter the value and press "Data Send" on the User Mode
screen.

3. Max. Copy Sets

Used to turn "ON" or "OFF" the maximum number setting of copy cycles.
Select "ON" to limit the number of copy cycles that can be performed in a single copy operation.

Description Initial Setting

1-99
OFF ∗

<Setting Procedure>
• To set the maximum number of copy cycles, enter the required value (1 to 99) from the 10-key
pad (without pressing any key on the screen). When it is not desired to set the maximum number,
select "OFF" on the screen.

S-17
 4 TECH. REP. MODE
• This mode is used by the Tech. Rep. to set, confirm, adjust and/or register various Tech. Rep.
functions.

4-1. Tech. Rep. Mode Menu Screen

Tech. Rep. Mode Menu Exit

Function ROM Version

Tech. Rep. Choice RD Mode

System Input ADF Check

Counter Level History

I/O Check Machine status

Last Trouble Admin. Mode

1134S034CA

4-2. Tech. Rep. Mode Setting Procedure

<Setting Procedure>
1. Place the copier in the Tech. Rep. mode by pressing the following Keys:

Stop Key → "0" → Stop Key → "1"

2. Select the mode to be set from among those displayed on the Tech. Rep. Mode Menu screen.
3. Make various mode settings according to the screens selected.
<Living the Mode>
• Press the Panel Reset Key.

S-18
4-3. Settings in the Tech. Rep. Mode
1. Function
• Used to adjust/confirm various Tech. Rep. functions.

Function Menu

F1 PaperPassage F7 Orig. Sensor

F2 Drum/Trans F8 ATDC Adiust

F3 Exp. Lamp

F4 HV Separator

F5 Optimum & AE FF F8 F5

F6 Edit Ref. Adj

1134S035CA

1-1. Function mode setting procedure

<Setting Procedure>
1. Select "Function".
2. Select the function mode to be adjusted/confirmed.
3. Press the Start Key to start the operation of the corresponding mode.
4. Press the Stop Key to stop the operation.

1-2. Settings in the Function mode

● F1 (Paper Passage)
This test can be initiated without having to wait for warm-up to complete.
<Operation time>
• This test continues until the Drawer or port selected for use runs out of paper.
• This test continues until the Stop Key is pressed.
● F2 (Drum/Trans)
Used to confirm the output of the High Voltage Unit (HV) for Drum Charge/Image Transfer
Coronas. (For factory setting)
<Operation time>
• This function runs for 30 seconds.
• This function runs until the Stop Key is pressed.
● F3 (Exp. Lamp)
Used to confirm that the Exposure Lamp is lit.
<Operation time>
• This test runs for 30 seconds.
• This test runs until the Stop Key is pressed.

S-19
● F4 (HV Separator)
Used to confirm the output of the High Voltage Unit (HV) for the Paper Separator Corona. (For
factory setting)
<Operation time>
• This function runs for 60 seconds.
• This function runs until the Stop Key is pressed.
● F5 (Optimum & AE)
Used to make Vg level adjustment, manual optimum exposure adjustment, and automatic AE
Sensor optimum exposure adjustment.
<Operation time>
• This function runs for 30 seconds.
• This function runs until the Stop Key is pressed.
● F6 (Edit Ref. Adj)
Used to adjust the edit position according to the pattern output by the Image Erase Lamp.
<Operation time>
• This function runs for one copy cycle.
● F7 (Orig. Sensor)
Used to automatically adjust the Original Size Detecting Sensor.
<Operation time>
• This function continues until the adjustment ends.
● F8 (ATDC Adjust)
This function agitates the developer to automatically adjust the ATDC Sensor level.
<Operation time>
• This function runs for 3 minutes.
• This function runs until the Stop Key is pressed.
● FF (F8 + F5)
Used to execute the F8 and F5 modes (at the time of set-up).
<Operation time>
• This function runs for 3 minutes 30 seconds.
• This function runs until the Stop Key is pressed.

S-20
1-3. Components energized in the Function mode

Mode
F1 F2 F3 F4 F5 F6 F7 F8 FF
Component
Main Drive Motor O O O O O O — O O
Fan Motors O O O O O O — O O
Toner Replenishing Motor O — — — — O — — —
Scan O — O — O O — — O
Paper Feed O — — — — O — — —
Drum Charge/Image Transfer Coronas O O O — O O — O —
Paper Separator Corona O — O O O O — O O
Developing Bias O — O O O O — O O
Exposure Lamp O — O — O — — — O
Main Erase Lamp O O O O O O — O O
Image Erase Lamp O — O — O O — O O
Paper Separator Finger O — — — — O — — —
Jam detection O — — — — O — — —
Malfunction detection O O O O O O O O O

O : Energized
—: Not energized

S-21
2. Tech. Rep. Choice
• Used by the Tech. Rep. to make adjustments and confirmations of various Tech. Rep. functions.

Tech. Rep. Choice Enter Tech. Rep. Choice BackUp Enter

Tech. Rep. Choice 1 Tech. Rep. Choice 2

Plug-In Counter # of Sheets Auto Paper Config. Inch/Metric

Size Counter A3 Sorter Trouble Enable Copy
Total Counter Mode 0 Leading Edge Erase Yes
Maintenance Call NO Trailing Edge Erase Yes
Copy Kit Counter NO Loop Adjust (Drawer) 50
Toner Empty Stop Disable Loop Adjust (Man/LCT) 50

# of Sheets Copy Cycle Inch/Metric Inch

Next Next

1134S036CA 1134S037CA

Tech. Rep. Choice BackUp Enter

Tech. Rep. Choice 3

Exp. Lamp Manual Adj. 50
ATDC T/C Ratio 50

47-54

1134S038CA

2-1. Tech. Rep. Choice mode setting procedure

<Setting procedure>
1. Select the Tech. Rep. mode.
2. Using ▼ / ▲ key, select the mode to be set/adjusted.
Note: Press the "Next"/"Back Up" key to switch the screen from one to another.
▲
▼

3. Using the / key, specify the function to be set.

4. Press the "Enter" Key to enter the set function.

2-2. Settings in the Tech. Rep. Choice mode

● Plug-In Counter
Used to select the counting method of the Plug-In Counter.

Screen Display Initial Setting

# of Sheets ∗
Copy Cycle

Note: For the counting methods, see the Count-Up List on the next page.

S-22
● Size Counter
Used to select the paper size counted by the Paper Size Counter.

<Metric Area> <Inch Area>

Screen Initial Screen Initial Screen Initial Screen Initial

Display Setting Display Setting Display Setting Display Setting
No A3/B4 No 11×14+LGR
A3 ∗ A3/B4 11 × 17 ∗ 11×14+LGR

Note: For the counting methods, see the Count-Up List given below.
● Total Counter
Used to select the counting method of each Counter according to the paper size and copy mode.

Screen Display Description Initial Setting

Mode 0 1 count per 1 copy cycle ∗
Multiple count-up according to the paper size and
Mode 1
copy mode
Multiple count-up according to the paper size and
Mode 2
copy mode

Note: For the counting methods, see the Count-Up List given below.

<Count-Up List>

Copy Mode 1-Sided 2-Sided

Sizes Sizes
Size Counter other than Sizes set other than Sizes set Manual
those set those set Feeding
Mode 0

Mode 1
Mode 2

Mode 0

Mode 1

Mode 2

Mode 0

Mode 1

Mode 2

Mode 0
Mode 1

Mode 2

Total Counter

Total Counter
1 1 2 2 2 2 4 4 1
(Mechanical/Electronic)
Size Counter (Electronic) 0 1 1 2 0 2 2 0 0
Two-Sided Total Counter
0 0 1 1 2 1 1 4 0
(Electronic)
Two-Sided Size Counter
0 0 0 1 1 4 0
(Electronic)
Plug-In # of sheets 1 1 2 2 1 2 2 1 4 4 1
Counter # of copy
(Mechanical) 1 1 2 2 2 2 4 4 1
cycles

0: No count 1: 1 count 2: 2 counts 4: 4 counts

S-23
<Setting of the Tech. Rep. Choice Mode When the D-102 Is Installed on the Copier>
• When the D-102 is fitted to the copier, set the Tech. Rep. Choice Mode as follows according to
the count-up mode of the D-102.

Tech. Rep. Choice Mode (Copier)

Count-Up Mode
(D-102) Plug-In Counter Total Counter
# of sheets # of copy cycles Mode 0 Mode 1
All Size Mode — O O O
Size Mode I
Size Mode II
Full Color Mode I O — O —
Mono Color Mode I
Special Mode I
2-Sided Mode I
2-Sided Mode II
Full Color Mode II — O O —
Mono Color Mode II
Special Mode II

O : Setting acceptable
—: Setting inhibited

● Maintenance Call
Used to select "YES" or "NO" for the Maintenance Call display when the Maintenance Counter
reaches the set count.

Screen Display Initial Setting

Yes
No ∗

Note: There are five different Maintenance Counters (up to five Counters may be set). When any of
the Maintenance Counters has reached the set count the Maintenance Call message is
displayed together with the inspection code "M1".

S-24
● Copy Kit Counter
Used to select "Yes" or "No" for "Copy Kit" counting by the Consumables Counter or to "Enable"
or "Disable" a copy cycle when the Counter reaches the set count.

Screen Display Description Initial Setting

No No count ∗
Copy enabled when the Counter reaches
Mode 1
the set count.
Copy disabled when the Counter reaches
Mode 2
the set count.

Note: Select Mode 1 or 2 to start the Copy Kit Counter counting. If "No" has been set for
Maintenance Call, the Maintenance Call message is displayed together with the inspection
code "M4" when the Counter reaches the set count.

● Toner Empty Stop

Used to select "Disable Copy" or "Enable Copy" after a Toner Empty condition is detected.

Screen Display Initial Setting

Enable Copy
Disable Copy ∗

Note: When "Disable Copy" has been selected, the copy cycle is inhibited on detection of a 2% or
less toner-to-carrier ratio.

● Auto Paper Config.

Used to automatically select "Metric or Inch" paper or "Metric" paper for the original size detected .

Screen Display Description Initial Setting

The copier automatically selects metric or
Metric/Inch ∗
inch paper for the original detected.
The copier automatically selects metric
Metric
paper for all originals detected.

S-25
● Sorter Trouble
Used to select "Enable Copy" or "Disable Copy" when a malfunction of the paper exit option is
detected.

Screen Display Description Initial Setting

Copy is enabled after detection of a
Enable Copy
malfunction.
∗
Copy is disabled after detection of a
Disable Copy
malfunction.

Note: If a malfunction has already been detected when "Enable Copy" is selected, a warning is
displayed only when the malfunctioning Mode detected is selected, and the Mode selected is
not accepted.

● Leading Edge Erase

Used to select "Yes" or "No" for the Leading Edge Erase function.
Note: When "Yes" is selected, the erase width is approx. 3 mm.

Screen Display Initial Setting

Yes ∗
No

● Trailing Edge Erase

Used to select "Yes" or "No" for the Trailing Edge Erase function.

Screen Display Initial Setting

Yes ∗
No

Note: When "Yes" is selected, the erase width is approx. 3 mm.

● Loop Adjust (Drawer)

Used to adjust the loop length (before the Synchronizing Roller) of the paper fed from any of the
1st to 5th Drawers.

Code Loop Length Initial Setting Code Loop Length Initial Setting
47 Approx. 4 mm 51 Approx. 12 mm
48 Approx. 6 mm 52 Approx. 14 mm
49 Approx. 8 mm 53 Approx. 16 mm
50 Approx. 10 mm ∗

S-26
● Loop Adjust (Man/LCT)
Used to adjust the loop length (before the Synchronizing Roller) of the paper fed manually or
from the paper feed option.

Code Loop Length Initial Setting Code Loop Length Initial Setting
47 Approx. 4 mm 51 Approx. 12 mm
48 Approx. 6 mm 52 Approx. 14 mm
49 Approx. 8 mm 53 Approx. 16 mm
50 Approx. 10 mm ∗

● Exp. Lamp Manual Adj.

Used to make fine-adjustment of the Lamp voltage in the Manual Exposure mode. When an
optimum manual exposure level cannot be achieved by the execution of the "F5" function mode
after the replacement of the PC Drum, etc., adjust the Exposure Lamp voltage in the range of −6
to +6V.

Variable Voltage Variable Voltage

Code Initial Setting Code Initial Setting
Value Value
44 −6V 51 +1V
45 −5V 52 +2V
46 −4V 53 +3V
47 −3V 54 +4V
48 −2V 55 +5V
49 −1V 56 +6V
50 0V ∗

Note: After the setting of this mode has been changed, the "F5" mode must be executed.

● ATDC Level
Used to specify the control level of the ATDC.

Code T/C Ratio Initial Setting Code T/C Ratio Initial Setting
47 4.5% 51 6.5%
48 5.0% 52 7.0%
49 5.5% 53 7.5%
50 6.0% ∗ 54 8.0%

S-27
3. System Setting
• This mode is used to set the fixed zoom ratio, paper size input, marketing area and Plug-In
Counter, or to advance the Drum Charge Corona Wire.

System Input Menu

Change Fixed Zoom Ratio

Paper Size Input

Marketing Area

Plug-In Counter

Advance Charge Wire

Telephone # Input

1134S039CA

3-1. System Setting setting procedure

<Setting procedure>
1. Select "System Setting".
2. Select the mode to be set.
3. Make the various settings according to the screens selected.

3-2. Settings in the System Setting mode

● Change Fixed Zoom Ratio
Used to reset a fixed zoom ratio to a desired value within the range ×0.500 to ×2.000.
<Setting procedure>
1. Select the fixed zoom ratio to be changed and clear it with the Clear Key.
Note: If the ratio cleared is not the one to be cleared, press the Panel Reset Key to return to the
preceding zoom ratio.
2. Using the 10-key pad, set the desired zoom ratio within the range ×0.500 to ×2.000.
3. Press the "Enter" Key on the screen to enter the zoom ratio set.
● Paper Size Input
Used to set the paper size used in the corresponding paper source.
<Setting procedure>
1. Select the paper source for which you want to set the paper size (on the paper Size Input 1
screen).
2. When the paper source is selected, the display automatically switches to the Paper Size Input 2
screen. Using the ▼ / ▲ key, select the paper used in the paper source selected, and press the
"Enter" key.

S-28
● Marketing Area
Used to change the paper size/fixed zoom ratio according to the marketing area.

Screen Display Initial Setting Screen Display Initial Setting

MJ ∗ MC
MH Others

Note: When the marketing area has been changed, the copier must be initialized.
● Plug-In Counter
Used to disable or enable the copier depending on whether or not a Plug-In Counter or Magnetic
Card is used when the copier is equipped with a Plug-In Counter or D-102.

Screen Display Description Initial Setting

The copier is disabled when the Plug-In
ON
Counter or Magnetic Card is removed.
The copier remains enabled even when
OFF the Plug-In Counter or Magnetic Card is ∗
removed.

Note: "ON" should be selected when the copier is equipped with a Plug-In Counter or D-102.
● Advance Charge Wire
Used to advance the Drum Charge Corona Wire to prevent uneven charging due to the Drum
Charge Corona Wire contaminated, etc.
<Operation procedure>
• Press the "Enter" key to advance the Drum Charge Corona Wire by six counts.
Note: The number of advance cycles of the Drum Charge Corona Wire is displayed at "Charge
Wire" on the Port/Option 3/3 screen. The maximum number of advance cycles is 185. If this
value is exceeded, the advance operation is disabled.
● Telephone # Input
Used to register the telephone number of the Tech. Rep. so that the telephone number registered
is displayed when a malfunction occurs or a Maintenance Call is displayed.
<Setting procedure>
• Press the Clear Key and register the telephone number using the 10-key pad (up to 19 digits).
Note: Use the Interrupt Key to register "—".

S-29
4. Counter
• This mode is used by the Tech. Rep. to set the counts of the Maintenance Counter and
Consumables Counter or to show the counts of various counters.

Counter Menu

Paper Port/Option

Jam Consumable

Retry Auto CPU Reset

Trouble

Maintenance

1134S040CA

4-1. Counter setting procedure

<Setting procedure>
1. Select "Counter".
2. Select the mode to be set/displayed.
3. Set or clear the count according to the screen selected.

4-2. Settings in the Counter mode

● Paper
Counts the number of sheets copied on a paper size/type basis (S0: standard paper, S1: recycled
paper, S2: special paper, S3: 2-sided disabled paper).
Note: For such a paper size as A4 which can be loaded both lengthwise and crosswise, the count
represents the sum of both.

<Paper Counter 1/2> <Paper Counter 2/2>

Paper Size Paper Type

A3 11 × 17 S0
B4 11 × 14 S1
A4 Legal S2
B5 Letter S3
A5 5-1/2 × 8-1/2
B6 FLS

<Clearing procedure>
• Using the ▼/▲ key, select the paper size or paper type to be cleared and press the Clear Key.
Note: If the paper size or paper type has been cleared accidentally, press the Interrupt Key to return
the counter to the count it had before clearing.

S-30
● Jam
Counts the number of jams that occurs in the copier or entire system (MCBJ) and per section.

<Jam Counter 1/3> <Jam Counter 2/3>

Screen Display Description Screen Display Description

Jam occurrence ratio in Number of jams that
MCBJ System
the system 4th Drawer occurred at the 4th
Drawer
Jam occurrence ratio in
MCBJ Machine Only
the copier only Number of jams that
5th Drawer occurred at the 5th
Number of jams that
Drawer
Manual Feed occurred at the Manual
Feed Section Number of jams that
Dup Entrance occurred at the Duplex
Number of jams that
Unit Entry
1st Drawer occurred at the 1st
Drawer Number of jams that
Dup Exit occurred at the Duplex
Number of jams that
Unit Exit
2nd Drawer occurred at the 2nd
Drawer Number of jams that
Vertical Trans. occurred in the
Number of jams that
Transport section
3rd Drawer occurred at the 3rd
Drawer Number of jams that
Horizontal Trans. occurred in the Paper
Separator section

Note: MCBJ = Total Counter value ÷ Jam Counter value

<Jam Counter 3/3>

Screen Display Description

Number of jams that
Exit occurred at the Exit
section
Number of jams that
Sorter occurred in the paper
exit option
Number of jams that
ADF
occurred in the ADF
Number of jams that
Note: When the PF-102 Paper Feed Cabinet is
occurred in the Large
LCT fitted to the copier, the count is displayed
Capacity Cassette on
as the 3rd Drawer.
C-301 section

<Clearing procedure>
• Using the ▼/▲ key, select the count to be cleared and press the Clear Key.
Note: If the count has been cleared accidentally, press the Interrupt Key to return the counter to the
count it had before clearing.

S-31
● Retry
Counts the number of feed retries which are made when no paper reaches the Paper Take-Up
Sensor in a given period of time in order to reduce misfeeds (jams) caused by slip, etc. of the
Paper Take-Up Roll.

Screen Display Description

Number of feed retries
1st Drawer
in the 1st Drawer
Number of feed retries
2nd Drawer
in the 2nd Drawer
Number of feed retries
3rd Drawer
in the 3rd Drawer
Number of feed retries
4th Drawer
in the 4th Drawer
Number of feed retries
5th Drawer
in the 5th Drawer
Number of feed retries
Dup
in the Duplex Unit
Number of feed retries
LCT in the Large Capacity
Cassette on C-301

<Clearing procedure>
• Using the ▼/▲ key, select the port to be cleared and press the Clear Key.
Note: If the count has been cleared accidentally, press the Interrupt Key to return the counter to the
count it had before clearing.
● Trouble
Counts the number of malfunction occurrences in each section.

<Trouble 1/7>

Screen Display
Description
Code Location
C000X Main Drive Motor Main Drive Motor rotation malfunction
C0040/1 Suction Fan Motor Suction Fan Motor rotation malfunction
C004A/b Optical Cooling Fan Motor Optical Cooling Fan Motor rotation malfunction
C004C/d Ventilation Fan Motor Ventilation Fan Motor rotation malfunction

S-32
 <Trouble 2/7>

Screen Display
Description
Code Location
Main Hopper Toner Replenishing Motor rotation
C0070/1 Main Hopper Motor
malfunction
Sub Hopper Toner Replenishing Motor rotation
C0072/3 Sub Hopper Motor
malfunction
Drum, Image Transfer, Paper Separator Corona
C0200 PC Charge Corona
malfunction
C0210 Image Transfer Corona Not detected
C03XX Control Board/Harness Control Board, Harness malfunction

<Trouble 3/7>

Screen Display
Description
Code Location
C04XX Exposure Lamp Exposure Lamp ON malfunction
C050X Fuser Warm-Up Warming-up malfunction
C051X Fuser Low Temp. Abnormally low fusing temperature
C052X Fuser High Temp. Abnormally high fusing temperature
C060X Scanner Drive System Scanner Motor/SCP Board malfunction
C061X Lens Drive System Lens drive malfunction
C0620 Mirror Drive System Mirror drive malfunction
C0650 Scanner Sensor Scanner Reference Position Sensor malfunction

S-33
 <Trouble 4/7>

Screen Display
Description
Code Location
C0660 Scanner System Scanner load malfunction
C06FX Scanner Interface Scanner Interface malfunction
C090X 3rd Drawer 3rd Drawer malfunction (PF-101/PF-202)
C091X 2nd Drawer 2nd Drawer malfunction
C092X 1st Drawer 1st Drawer malfunction
C095X 4th Drawer 4th Drawer malfunction (PF-202)
C0990-6 LCC Main-Tray PF-102 malfunction
C0998-d LCC Shift System PF-102 malfunction

<Trouble 5/7>

Screen Display
Description
Code Location
C09CX LCT C-301 malfunction
C0E0X Main Erase Lamp Main Erase Lamp ON malfunction
C0E20 Auxil. Erase Lamp Image Erase Lamp ON malfunction
C0F02 Orig. Size Det. CPU Original Size Detecting Board malfunction
C0F10 AE Sensor AE Board malfunction
C0F2X AIDC Sensor AIDC Sensor malfunction
C0F3X ATDC Sensor ATDC Sensor malfunction

S-34
 <Trouble 6/7>

Screen Display
Description
Code Location
C0F79 Paper Empty Sensor PF-102 Paper Empty Sensor malfunction
C0FE/FX Orig. Size Det. Sensor Original Size Detecting Sensor malfunction
C0b0X Sorter (Transport) Sorter transport malfunction
C0b1X Sorter (Chuck) Sorter Chuck movement malfunction
C0b3X Sorter (Guide) Sorter Paper Aligning Motor malfunction
C0b5X Sorter (Stapler) Stapler malfunction
C0b6X Sorter (Bin Shift) Bin movement malfunction

<Trouble 7/7>

Screen Display
Description
Code Location
C0b7X Sorter (Puncher) Punch hole malfunction
C0d00 Front/Rear Guide Front/Rear Edge Guide operation malfunction
C0d20 Dup Storage Gate operation malfunction
C0d5X Dup Drive Motor Duplex Unit Drive Motor malfunction

Note: For details of malfunctions, see the TROUBLESHOOTING Manual.

<Clearing procedure>
• Using the ▼/▲ key, select the count to be cleared and press the Clear Key.
Note: If the count has been cleared accidentally, press the Interrupt Key to return the counter to the
count it had before clearing.

S-35
● Maintenance
Set the next maintenance time based on copy cycle count. The count is decreased by 1 per copy
cycle. When the count reaches the setting, the Maintenance Call message and inspection code
"M1" are displayed together.
Note: The Maintenance Call message is displayed or not displayed depending on the setting of
"Maintenance Call" in the Tech. Rep. Choice mode.
Note: If the Maintenance Call message is displayed, the copy cycle can be continued and copy is
not disabled.

Screen Display
Set Count
Counter 1 XXXXXX XXXXXX
Counter 2 XXXXXX XXXXXX
Counter 3 XXXXXX XXXXXX
Counter 4 XXXXXX XXXXXX
Counter 5 XXXXXX XXXXXX

<Setting procedure>
▲

1. Using the ▼/ key, select the counter to be set (1 to 5).

2. Enter the value from the 10-key pad (max. six digits).

▲
Note: To clear the counter, select the count to be cleared using the ▼/ key, and press the Clear
Key. If the count has been cleared accidentally, press the Interrupt Key to return the counter
to the count it had before clearing.

S-36
● Port/Option
Counts the frequency of use per port/option as reference data to be used by the Tech. Rep. in
maintenance.

<Port/Option 1/3> <Port/Option 2/3>

Screen Display Description Screen Display Description

Number of sheets fed Number of sheets fed
Manual Feed from the Manual Feed LCT from the Large Capacity
Section Cassette on C-301
Number of sheets fed Number of sheets that
1st Drawer ADF
from the 1st Drawer passed the ADF Entry
Number of sheets fed Number of sheets that
2nd Drawer
from the 2nd Drawer ADF Rev. passed the ADF
Turnover section
Number of sheets fed
3rd Drawer
from the 3rd Drawer Number of paper
Dup take-up cycles in the
Number of sheets fed
4th Drawer Duplex Unit
from the 4th Drawer
Number of sheets that
Number of sheets fed
5th Drawer Sorter passed through the
from the 5th Drawer
Sorter
Number of stapling
Stapler
cycles

<Port/Option 3/3>

Screen Display Description

Number of punching
Puncher
cycles
Value converted from
the number of PC Drum
PC Drum revolutions into the
number of A4 crosswise
sheets fed
Starter Number of sheets fed Note: When the PF-102 Paper Feed Cabinet is
fitted to the copier, the count is displayed
Value converted from as the 3rd Drawer.
the number of Fusing Note: The counts of the PC Drum, Fusing Roller
Fusing Roller Roller revolutions into and Charge Wire are displayed on a 1000
the number of A4 sheet basis.
crosswise sheets fed
Value converted from
the number of advance
Charge Wire
pulses into the number
of sheets copied

<Clearing procedure>
• Using the ▼/▲ key, select the count to be cleared and press the Clear Key.
Note: If the count has been cleared accidentally, press the Interrupt Key to return the counter to the
count it had before clearing.

S-37
● Consumables
Set the life of the consumables. When the count which increases one per copy cycle reaches the
set count, the Maintenance Call message and a code are displayed.
Note: Code display
Toner Collect: Code "M2", Copy Kit: Code "M4"
Note: The setting of Toner Collect should be 180K/80K for the copier with/without the Paper Feed
Cabinet, and must not be greater than the above. Copy is disabled and the Tech. Rep. Call
message displayed 5000 copy cycles after the count has reached the setting.
Note: "Copy Kit" depends on the setting of "Copy Kit Counter" in the Tech. Rep. Choice mode.

Screen Display
Set Count
Toner Collect XXXXXX XXXXXX
Copy Kit XXXXXX XXXXXX

<Setting procedure>
▲

1. Using the ▼/ key, select the counter to be set (1 to 5).

2. Enter the value from the 10-key pad (max. six digits).
Note: To clear the counter, select the count to be cleared using the ▼/

▲
key, and press the Clear
Key. If the count has been cleared accidentally, press the Interrupt Key to return the counter
to the count it had before clearing.
<Clearing procedure>
• Using the ▼/▲ key, select the count to be cleared and press the Clear Key.
Note: If the count has been cleared accidentally, press the Interrupt Key to return the counter to the
count it had before clearing.

S-38
 - Maintenance Code Display Resetting Procedures -
• Code: M1
Displayed to indicate that the count of any Maintenance Counter has reached the set count.
<Resetting procedure>
1. Select "Count" in the Tech. Rep. mode and access the"Maintenance" screen.
2. Select the count that has reached the set count and press the Clear Key to clear the count.
• Code: M2
Displayed to indicate that the Toner Collect count of the Consumables Counter has reached the
set count.
<Resetting procedure>
1. Select "Count" in the Tech. Rep. mode and access the "Consumables" screen.
2. Select the count of Toner Collect and press the Clear Key to clear the count.
• Code: M4
Displayed to indicate that the Copy Kit count of the Consumables Counter has reached the set
count.
<Resetting procedure>
1. Select "Count" in the Tech. Rep. mode and access the "Consumables" screen.
2. Select the count of Copy Kit and press the Clear Key to clear the count.
● Auto CPU Reset
On detection of an incorrect operation due to noise, etc., the CPU deenergizes and energizes the
Main Relay to prevent the occurrence of a malfunction. "1" or "0" is displayed to indicate whether
an incorrect operation has occurred or not based on the locations of occurrences.

Screen Display Description

MSC/Panel PWB-B (MSC Board)
Master PWB-A (Master Board)
SCP PWB-J (SCP Board)
ADF AFR-9
Sorter S-205/ST-101/ST-206
Data Controller D-102

Note: "1" indicates the occurrence of a malfunction and "0" no malfunction.

S-39
5. I/O Check
• This mode is used to check the Sensors and Boards at the occurrence of a jam or malfunction to
determine the location of the fault.

I/O Check Menu

IC Port Data Check

Paper Path Sensors Check

Memory Check

Controller Board Check

Panel Indication Check

1134S041CA

5-1. I/O Check setting procedure

<Setting procedure>
1. Select "I/O Check".
2. Select the mode to be checked.
3. Check the mode and change data according to the screen selected.

5-2. Settings in the I/O Check mode

● IC Port Data Check
Shows the states of I/O ports in a machine stop state.
<Input ports>
= Input Port Data display: "L/H" =
Cause the sensor to be "not blocked" or "blocked" to display "H" or "L" as input port data according
to the sensor state. This allows the sensor to be checked.
<Output ports>
= Output Port Data display: "0/1" =
Change the data of an output port from "0 to 1" or "1 to 0" with the "Change" key to make an
operation check on the electrical part corresponding to that port. This allows the electrical part to be
checked.
Note: Only the ports whose data may be changed are highlighted. 5 seconds after the data is
changed, the port highlighted returns to the previous state. Two or more pieces of data cannot
be changed together.

S-40
 <IC Port Data 1/8>

Data
IC No. Port
7 6 5 4 / 3 2 1 0
PWB-A P47-0 1 H 1 1 L ∗ ∗ ∗
(IC1A) P57-0 H 1 0 1 0 1 1 1
P67-0 0 0 0 1 H H L 1
P87-0 1 ∗ L ∗ 1 ∗ H ∗
PWB-A APA7-0 1 1 1 1 1 1 1 1
(IC4A) APB7-0 ∗ ∗ H L H H H L
APC7-0 ∗ 1 0 1 L H ∗ H
BPA7-0 1 1 1 1 1 1 ∗ ∗

Note: "∗" indicates either an unused or non-existing port.

<IC Port Data 2/8>

Data
IC No. Port
7 6 5 4 / 3 2 1 0
PWB-A BPB7-0 L H H H H H L H
(IC4A) BPC7-0 H L L L H H H H
O3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PWB-A APA7-0 ∗ ∗ L L L L ∗ ∗
(IC5A) APB7-0 H H H L H L H L
APC7-0 H H H L 1 1 1 1
BPA7-0 1 1 0 0 1 0 1 ∗
BPB7-0 L L H ∗ ∗ ∗ ∗ ∗

<IC Port Data 3/8>

Data
IC No. Port
7 6 5 4 / 3 2 1 0
PWB-A BPC7-0 1 1 1 1 ∗ ∗ ∗ ∗
(IC5A) O3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PWB-F (4) PB3-0/PA3-0 1 1 1
1 1 1 1 1
(IC1F) PD3-0/PC3-0 ∗ ∗ H H L L H H
PF3-0/PE3-0 H H 1 1 H H 0 0
PH3-0/PG3-0 ∗ ∗ 0 0 L H H L
PWB-A (200) PB3-0/PA3-0 1 ∗ 1 1 1 1 1 1
(IC1A) PD3-0/PC3-0 ∗ ∗ H L H H L L

Note: 200 indicates the PF-202.

S-41
 <IC Port Data 4/8>

Data
IC No. Port
3 2 1 0 / 3 2 1 0
PWB-A (200) PF3-0/PE3-0 L L 0 0 H L 0 0
(IC1A) PH3-0/PG3-0 ∗ ∗ 0 0 L L 0 0
PWB-A (200) PB3-0/PA3-0 H L L H L L ∗ ∗
(IC2A) PD3-0/PC3-0 ∗ ∗ ∗ ∗ L ∗ ∗ ∗
PF3-0/PE3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PH3-0/PG3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PWB-A (100) PB3-0/PA3-0 1 ∗ ∗ ∗ ∗ ∗ ∗ ∗
(IC1A) PD3-0/PC3-0 ∗ ∗ ∗ ∗ H ∗ ∗ ∗

<IC Port Data 5/8>

Data
IC No. Port
3 2 1 0 / 3 2 1 0
PWB-A (100) PF3-0/PE3-0 ∗ ∗ ∗ ∗ ∗ L ∗ ∗
(IC1A) PH3-0/PG3-0 ∗ ∗ 0 0 ∗ ∗ 0 0
PWB-A (100) PB3-0/PA3-0 ∗ L H H L H ∗ ∗
(IC2A) PD3-0/PC3-0 ∗ ∗ ∗ ∗ L ∗ ∗ ∗
PF3-0/PE3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PH3-0/PG3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PWB-A (400) PB3-0/PA3-0 1 ∗ 1 ∗ 1 1 1 1
(IC2A) PD3-0/PC3-0 ∗ ∗ H L H H ∗ L

Note: 400 indicates the PF-102.

<IC Port Data 6/8>

Data
IC No. Port
3 2 1 0 / 3 2 1 0
PWB-A (400) PF3-0/PE3-0 H H 0 0 H L ∗ ∗
(IC1A) PH3-0/PG3-0 ∗ ∗ 0 0 L L 0 0
PWB-A (400) PB3-0/PA3-0 ∗ L L H H L 1 1
(IC2A) PD3-0/PC3-0 ∗ ∗ H ∗ L H H L
PF3-0/PE3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PH3-0/PG3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PWB-G (Dup) PB3-0/PA3-0 1 1 ∗ ∗ 1 ∗ 1 1
(IC1G) PD3-0/PC3-0 ∗ ∗ ∗ ∗ L H H H

Note: Dup indicates the AD-5.

S-42
 <IC Port Data 7/8>

Data
IC No. Port
3 2 1 0 / 3 2 1 0
PWB-G (Dup) PF3-0/PE3-0 0 0 0 0 ∗ ∗ H L
(IC1G) PH3-0/PG3-0 ∗ ∗ 1 1 0 0 0 0
PWB-A (C) PB3-0/PA3-0 1 ∗ ∗ ∗ ∗ ∗ ∗ ∗
(IC1A) PD3-0/PC3-0 ∗ ∗ ∗ ∗ ∗ L ∗ H
PF3-0/PE3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PH3-0/PG3-0 ∗ ∗ 0 ∗ ∗ ∗ 0 0
PWB-A (LCC) PB3-0/PA3-0 ∗ ∗ ∗ ∗ ∗ 0 0 1
(IC1A) PD3-0/PC3-0 ∗ ∗ ∗ ∗ ∗ L H L
Note: C indicates the 100-Sheet Feed Drawer.
LCC indicates the C-301.

<IC Port Data 8/8>

Data
IC No. Port
3 2 1 0 / 3 2 1 0
PWB-A (LCC) PF3-0/PE3-0 ∗ ∗ ∗ ∗ ∗ ∗ 0 0
(IC1A) PH3-0/PG3-0 ∗ ∗ 1 1 H L H L

S-43
● Paper Path Sensors Check
The passage of paper causes the states of the Paper Path Sensors to be switched from "1 to 0"
or "0 to 1" in order of paper passage. This allows checking whether the Sensors are "normal" or
"faulty".

Screen Display Sensor Name

1 1st Feed 1st Drawer Paper Take-Up Sensor (PC56)
2 2nd Feed 2nd Drawer Paper Take-Up Sensor (PC57)
3 3rd Feed 3rd Drawer Paper Take-Up Sensor (PC21)
4 4th Feed 4th Drawer Paper Take-Up Sensor (PC29)
5 1st Vertical 1st Drawer Vertical Transport Sensor (PC63)
6 2nd Vertical 2nd Drawer Vertical Transport Sensor (PC64)
7 3rd Vertical Vertical Transport Sensor 3 (PC17)
8 4th Vertical Vertical Transport Sensor 4 (PC22)
9 Trans. Roller Transport Roller Sensor (PC54)
10 Leading Edge Paper Leading Edge Detecting Sensor (PC55)
11 Exit Section Paper Exit Switch (S53)
12 Turnover Duplex Unit Turnover Path Sensor (PC13)
13 Dup Entrance Duplex Unit Paper Entry Sensor (PC14)
14 Dup Exit Duplex Unit Paper Take-Up Sensor (PC16)

Note: "0": Paper present, "1": Paper absent

<Setting procedure>
• Select the paper path (Drawer/Duplex Unit) to be checked, enter this mode, and press the Start
Key.
Note: When "Auto Paper" has been selected, paper is not passed (the check is not made).

S-44
● Memory Check
Used to check whether the ROM/RAM on the PWB-B Board (MSC Board) is accessed properly or
not.

Check Result Screen Display Action

"Memory check completed. Turn the The Power Switch must be turned OFF
Normal
Power Switch OFF, and then ON. and ON.
"ROM ERROR" Change PWB-B (IC2B).
"Message ROM ERROR" Change PWB-B (IC4B).
Faulty
"RAM ERROR" Change the PWB-B Board.
"VRAM ERROR" Change the PWB-B Board.
"LCDTC ERROR" Change the PWB-B Board.

<Setting procedure>
• Selecting this mode automatically puts the copier in the Memory Check mode.
Note: For the screen displayed after completion of the check, see the above table.
● Controller Board Check
Used to make a self-diagnostic check on the PWB-A (Master Board).

Check Result Screen Display Action

"Board Check mode highlighted None
Normal
returns to the previous state."
Faulty "Malfunction code C03XX is displayed." Change the PWB-A Board.

<Setting procedure>
• Selecting this mode automatically puts the copier in the Controller Board Check mode.
Note: For the screen displayed after completion of the check, see the above table.
● Panel Indication Check
Used to check the Control Panel LEDs and screen (liquid crystal).
<Setting procedure>
1. When this mode is selected, the LEDs which are all ON are turned OFF in the following
sequence. When all the LEDs are turned OFF, they are turned ON again in the same sequence.

All ON Mode Check Key Energy Saver Key Interrupt Key Start Key (Orange)

2. Checkered patterns appear on the screen (liquid crystal).

3. Select individual patterns. If the pattern displayed on the screen is switched from white to black
or from black to white, it is judged that the corresponding liquid crystal is normal.

S-45
6. Last Trouble
• Displays the copy mode in which the most recent malfunction occurred.

Item Description
Copy paper APS, paper size
Zoom ratio AMS, zoom ratio
Image density AE, Manual Exposure
Copy cycle Copy cycle
1-sided → 2-sided, 2-sided → 2-sided, etc., Mixed Original
Original copy mode
Detection mode, Book mode
Sort mode Sort, Non-sort, Group, Staple, Punch
Cover mode Front cover, back cover, copied cover, not copied
Insertion mode Copied insert, non-copied
OHP Interleaving mode Copied interleave, non-copied
File Margin mode Margin function, margin position, margin width
Erase mode Erase function, erase position, erase width

S-46
7. ROM Version
• Displays the current ROM version loaded in the system.

ROM Version Menu

ROM Version

MSC/Panel
Master
SCP
ADF
Sorter
Data Controller
Message

1134S045CA

Screen Display Description

MSC/Panel PWB-B (IC2B)
Master PWB-A (IC2A)
SCP PWB-J (IC1J)
ADF PWB-A (IC3A)
S-205 PWB-A (IC3A)
Sorter ST-101 PWB-A (IC3A)
ST-206 PWB-A (IC3A)
Data Controller D-102 (IC2)
Message PWB-B (IC4B)

Note: The ST-101 may only be fitted to the EP3050.

S-47
8. RD Mode
• Select this mode when the copier is fitted with the DT-103.

RD Mode Menu

End of normal data trans.

ID Code
*******
DT Setting Initial
Transmission

Data Save Call Completion

Data Load Counter Clear

1134S052CA

<Setting procedure>
• With this screen displayed, enter the ID Code from the 10-key pad (seven digits).

8-1. Settings in the RD mode

● DT Setting
When the copier is fitted with the DT-103, make the necessary settings.

RD Mode Menu RD Mode BackUp Menu

DT Setting DT Setting
CT-ID Dial Mode Tone
DT-ID Auto Receive YES
TEL No. RAM Clear YES

Next Change

1134S053CA 1134S054CA

<Setting procedure>
1. Select CT-ID and enter the center ID from the 10-key pad (four digits).
2. Select DT-ID and enter the data terminal ID from the 10-key pad (six digits).
3. Select TEL No. and enter the telephone number of the Center from the 10-key pad.
Note: When the office extension and outside line use different systems, enter "p" (for a "pulse"
telephone line) or "t" (for a "tone" telephone line) with the Stop Key before entering the
telephone number.
Note: Enter a pause or wait code according to the time required for switching from the extension line
to the outside line, which depends on the type of office system used:
Switching time = less than 3 seconds → Use the Interrupt Key to enter the pause code "—".
Switching time = more than 3 seconds → Use the Energy Saver Key to enter the wait code
"w".

S-48
4. Press the "Next" key.
5. Select "Dial Mode" and set the Dial Mode with the "Change" key according to the type of the
telephone line used.

Pulse line P10/P20

Tone line Tone

6. Select "Auto Receive" and specify "Yes" or "No" using the"Change" key.

Yes There is a DT-103 dedicated line.

No There is no DT-103 dedicated line.

Note: When there is no DT-103 dedicated line, specify "No".

7. Select "RAM Clear" and select "No" using the "Change" key.

Yes To make setting again.

No Normal setting

Note: Select "Yes" to change CT-ID or DT-ID after completion of the set-up. If "Yes" is not selected,
the setting cannot be changed.
● Data Save
Used to transmit the User’s Choice/Tech. Rep. Choice settings to the Center.
● Data Load
Used to return the Choice settings transmitted to the Center by Data Save.
● Initial Transmission
Used when the DT-103 has been set up to give a transmission command from the Data Terminal
to the Center to check the communication status.
Any of the following messages is displayed according to the communication status:

Message Displayed
End of normal data trans. Connection failed.
Line is busy. DT modem error.
Not answering. Connected.
Max. trial number reached.

● Call Completion
Notifies the Center that the maintenance of the machine is complete.

S-49
● Counter Clear
Used to clear the Spare Counter to be cleared.

RD Mode Menu

SpareCounter Clear

1 2 3 4 5

6 7 8 9 10

11 12 13 14 15

16 17 18 19 20

1134S055CA

<Setting procedure>
• Selecting the Counter to be cleared clears the selected Counter.

S-50
9. ADF Check/Setting
• This mode is used to check the operation of the Automatic/Duplexing Document Feeder and to
adjust the document stop position in each mode.

ADF Check/Setting Menu

Paper Passage & Input Check

Output Check

Doc. Stop Position Set

1134S050CA

9-1. ADF Check/Setting setting procedure

<Setting procedure>
1. Select "ADF Check/Setting".
2. Select the mode to be checked/set.
3. Make the check or adjustment in the corresponding mode according to the screen selected.

S-51
9-2. Settings in the ADF Check/Setting mode
● Paper Passage & Input Check
The results of the Paper Passage Check and Sensor Check of the document path in each mode
are indicated by "1/0".

Sensor
Empty Sensor (PC2)
Register Sensor (PC1)
Exit Sensor (PC8)
Width Sensor A (PC9)
Width Sensor B (PC10)
Width Sensor C (PC11)
Pick-Up Sensor A (PC3)
Pick-Up Sensor B (PC4)

Note: "1" indicates that paper is present and "0" that paper is absent except for the Pick-Up Sensors
A, B where "1" indicates that the Sensor is unblocked and "0" that it is blocked.
<Setting procedure>
1. On the Paper Passage Check screen, select the mode to be checked.
2. Press the "Next" key to access the Input Check screen, load paper onto the Automatic/Duplexing
Document Feeder, and press the Start Key.
3. According to the mode selected, make sure that "1/0" changes in order of the paper passage.
● Output Check
Used to check the operations of the Motors and Solenoids as single parts.

Screen Display Part Name Screen Display Part Name

M1 Pick-Up Motor M4 Turnover/Exit Motor
M2 Paper Take-Up Motor SL1 Scale Solenoid
M3 Main Drive Motor SL2 Turnover Solenoid

<Setting procedure>
• Select the part to be checked for operation and press the Start Key.

S-52
● Doc. Stop Position Set
Used to adjust the document stop position in each mode.
- 1-Sided -
Used to adjust the stop position of 1-sided documents when the Automatic/Duplexing Document
Feeder is used on the copier.

Setting Description Initial Setting Setting Description Initial Setting

43 Approx. −7 mm 51 Approx. +1 mm
44 Approx. −6 mm 52 Approx. +2 mm
45 Approx. −5 mm 53 Approx. +3 mm
46 Approx. −4 mm 54 Approx. +4 mm
47 Approx. −3 mm 55 Approx. +5 mm
48 Approx. −2 mm 56 Approx. +6 mm
49 Approx. −1 mm 57 Approx. +7 mm
50 Approx. 0 mm ∗ 58 Approx. +8 mm

Note: "43 to 49": Direction in which the document stop position overlaps the Original Scale
"51 to 58": Direction in which the document stop position moves away from the Original Scale
- 2-Sided -
Used to adjust the stop position of 2-sided documents when the Automatic/Duplexing Document
Feeder is used on the copier.

Setting Description Initial Setting Setting Description Initial Setting

43 Approx. −7 mm 51 Approx. +1 mm
44 Approx. −6 mm 52 Approx. +2 mm
45 Approx. −5 mm 53 Approx. +3 mm
46 Approx. −4 mm 54 Approx. +4 mm
47 Approx. −3 mm 55 Approx. +5 mm
48 Approx. −2 mm 56 Approx. +6 mm
49 Approx. −1 mm 57 Approx. +7 mm
50 Approx. 0 mm ∗ 58 Approx. +8 mm

Note: "43 to 49": Direction in which the document stop position overlaps the Original Scale
"51 to 58": Direction in which the document stop position moves away from the Original Scale

S-53
- 2in1-
Used to adjust the stop position of 2-in-1 documents when the Automatic/Duplexing Document
Feeder is used on the copier.

Setting Description Initial Setting Setting Description Initial Setting

43 Approx. −7 mm 51 Approx. +1 mm
44 Approx. −6 mm 52 Approx. +2 mm
45 Approx. −5 mm 53 Approx. +3 mm
46 Approx. −4 mm 54 Approx. +4 mm
47 Approx. −3 mm 55 Approx. +5 mm
48 Approx. −2 mm 56 Approx. +6 mm
49 Approx. −1 mm 57 Approx. +7 mm
50 Approx. 0 mm ∗ 58 Approx. +8 mm

Note: "43 to 49": Direction in which the document stop position overlaps the Original Scale
"51 to 58": Direction in which the document stop position moves away from the Original Scale
- 2in1 Doc. Spacing -
Used to adjust the spacing of 2-in-1 documents when the Automatic/Duplexing Document Feeder is
used on the copier.

Setting Description Initial Setting Setting Description Initial Setting

43 Approx. −7 mm 51 Approx. +1 mm
44 Approx. −6 mm 52 Approx. +2 mm
45 Approx. −5 mm 53 Approx. +3 mm
46 Approx. −4 mm 54 Approx. +4 mm
47 Approx. −3 mm 55 Approx. +5 mm
48 Approx. −2 mm 56 Approx. +6 mm
49 Approx. −1 mm 57 Approx. +7 mm
50 Approx. 0 mm ∗ 58 Approx. +8 mm

Note: "43 to 49": Direction in which the document spacing decreases

"51 to 58": Direction in which the document spacing increases
<Setting procedure>
1. Using the ▼/▲ key, select the mode to be adjusted.
▲
▼

2. Using the / key, select the desired setting.

S-54
10. Level History
• This mode is used to display and set various level operating values to the operating status of the
machine.

<Level History 1/2>

Screen Display Variable Range Increments Description

Set 2 to 254 2 Reference value of ATDC control
ATDC Level
Correction 1.0 to 9.0 (%) 0.5% Current ATDC level
Initial 550 to 850 (V) 30V Initial setting of grid voltage
Vg Level Correction value of grid voltage due
Current 550 to 850 (V) 30V
to changes with time

<Level History 2/2>

Screen Display Variable Range Increments Description

Set 190 to 210 (°C) 10°C Target value of fuser temperature
Fuser Temp.
Current 160 to 230 (°C) 10°C Current fuser temperature
Initial setting of Exposure Lamp
Initial 49 to 71 (V) 1V
level
Expo. Level
Correction value of Exposure Lamp
Current 49 to 71 (V) 1V
voltage due to changes with time
0 to 1270 Cumulative time of toner
Toner Replenishing Time 10 minutes
(minutes) replenishment

NOTE
Values may be entered into only "ATDC Level - Set" and "Fuser Temp. - Set". The other level
histories are only displayed for your reference.

= ATDC level reference value =

When the PWB-R (RAM Board) is changed or the P/C Unit from another machine is used, enter
the ATDC level reference value (given on the Label found inside the Front Door).

= Fuser temperature setting =

When a fusing malfunction occurs frequently due to the environment or paper used, adjust the
fuser temperature setting to prevent the fuser malfunction.

<Setting procedure>
1. Select the mode to be set.
▲
▼

2. Using the / key, select the desired setting.

S-55
11. Machine Status
• This mode is used to display up to five codes of isolated malfunctions that have occurred. The
following malfunctions are detected as isolated malfunctions.

Malfunction Code Description

C01 00 Charge Wire advance malfunction
C03 50 to 54 Control Board, Harness malfunction
70/74
C09 XX Paper feed malfunction
C0F 02 Original size detection malfunction
C0F 20 to 23 AIDC Sensor malfunction
C0F 30/31 ATDC Sensor malfunction
C0F 7X Paper Empty Sensor malfunction
C0F E1 to FF Original Size Detecting Sensor malfunction
C0b 10 to 13, 30, 51, 60 to 64, 70, 71 Sorter malfunction
C0d XX Duplex Unit malfunction

Note 1: Up to five isolated malfunction codes are displayed. When the sixth isolated malfunction is
detected or when an isolated malfunction is detected at any paper source other than the
Manual Feed Section, the corresponding ordinary malfunction code is displayed and copy is
disabled.
Note 2: The isolated malfunctions corresponding to codes C0bXX (Sorter Trouble) are displayed in
the form of the following pictorial symbols, not in the form of malfunction codes. The
malfunctions corresponding to codes C0b10 to 13, 51 and 70 are treated as isolated
malfunctions when detected during initial operation and as ordinary malfunctions when
detected during a copy cycle.
C0b10 to 13/30/60 to 64 : 1134M071AA

C0b51 : 1134M072AA

C0b70, 71 :
1134M073AA
<Clearing procedure>
• With the Machine Status screen being displayed, swing open/close the Front Door to clear all the
isolated malfunction codes being displayed.
Note: For C0F02/C0FE1 to FF and C0bXX, turn the Power Switch OFF and ON to clear the isolated
malfunction codes.

S-56
12. Administrator Mode
• This mode is used to set the administrator number in addition to the functions on "Menu Screen
6/6" in the User’s Choice mode.

Administrator Mode Menu

Select a function by pressing the

key.
Copy Track: OFF

User Help:

Max. Copy Sets: OFF

Administrator # Input:

1134S044CA

● Copy Track
● User Help ∗: For these functions, see "Menu Screen 6/6" in the User’s Choice Mode.
● Max. Copy Sets

● Administrator # Input
Used to set the administrator number required to make any of the above settings on "Menu
Screen 6/6" in the User’s Choice Mode. (Identification number setting for opening the screen)
<Setting procedure>
• Enter the number from the 10-key pad (max. four digits).

S-57
 5 ADJUST MODE
• This mode is used to adjust the optical components before shipment from the factory and must not
be executed except when the PWB-R (RAM Board) has been changed. When the PWB-R has
been changed, enter the factory settings indicated on the Label inside the Front Door.

5-1. Adjust Mode Screens

Adjust Enter Adjust BackUp Enter

Adjust 1/2 Adjust 2/2

A0 Lens Focus 50 A6 Book B-Scan Regist 50

A1 Lens Full Size Position 50
A2 Mirror Full Size Position 50 A11 Lens Position Enlargement 50
A3 Feed Direction Mag. Ratio 50 A12 Leading Edge Erase Adjust 50
A4 Lens Position Full Size 50 A13 Trailing Edge Erase Adjust 50
A5 Lens Position Reduction 50

49-51 45-55

Next

1134S042CA 1134S043CA

5-2. Adjust Mode Setting Procedure

<Setting Procedure>
1. Place the copier in the Tech. Rep. mode by pressing the following Keys.

Stop Key → "0" → Stop Key "1"

2. Then, place the copier in the Adjust Mode with the following Keys.

Stop Key → Start Key

3. Make various settings according to the screen selected.

4. Using the ▼/▲ key, select the function of the Adjust Mode to be set.
Note: Press the "Next" or "Back Up" key to switch the screen from one to the other.
▼
▲

5. Using the / key, select the setting.

6. Press "Enter" to enter the setting.
Note: In regard to A0 and A1 after pressing Enter Key, setting is completed by turning the Power
switch OFF and ON.
<Leving the Mode>
• Press the Panel Reset Key.

S-58
5-3. Settings in the Adjust Mode
● Lens Focal Length Adjustment (A-0)
Corrects the focal length of the Lens.

Setting Description Initial Setting

Short focal
49 length
adjustment
50 Standard ∗
Long focal
51 length
adjustment

● Lens Full Size Position Adjustment (A-1)

Adjusts the magnification ratio in the crosswise direction by finely adjusting the Lens home
position.

Setting Description Initial Setting Setting Description Initial Setting

43 ±0 steps 51 +16 steps
44 +2 steps 52 +18 steps
45 +4 steps 53 +20 steps
46 +6 steps 54 +22 steps
47 +8 steps 55 +24 steps
48 +10 steps 56 +26 steps
49 +12 steps 57 +28 steps
50 +14 steps ∗ 58 +30 steps

S-59
● Mirror Full Size Position Adjustment (A-2)
Corrects the optical length of the Mirror in response to the Lens Focal Length Adjustment.

Setting Description Initial Setting Setting Description Initial Setting

43 ±0 steps 51 +24 steps
44 +3 steps 52 +27 steps
45 +6 steps 53 +30 steps
46 +9 steps 54 +33 steps
47 +12 steps 55 +36 steps
48 +15 steps 56 +39 steps
49 +18 steps 57 +42 steps
50 +21 steps ∗ 58 +45 steps

● Feeding Direction Magnification Ratio Adjustment (A-3)

Adjusts the magnification ratio in the feeding direction by finely adjusting the scan speed.

Setting Description Initial Setting Setting Description Initial Setting

46 −16/1000 51 +4/1000
47 −12/1000 52 +8/1000
48 −8/1000 53 +12/1000
49 −4/1000 54 +16/1000
50 ±0 ∗

S-60
● Lens Position Full Size Registration (A-4)
Adjusts the leading edge for a full size copy by changing the engagement timing of the
Synchronizing Roller.

Setting Description Initial Setting Setting Description Initial Setting

40 −10 pulses 51 +1 pulse
41 −9 pulses 52 +2 pulses
42 −8 pulses 53 +3 pulses
43 −7 pulses 54 +4 pulses
44 −6 pulses 55 +5 pulses
45 −5 pulses 56 +6 pulses
46 −4 pulses 57 +7 pulses
47 −3 pulses 58 +8 pulses
48 −2 pulses 59 +9 pulses
49 −1 pulse 60 +10 pulses
50 ±0 ∗

Note: Increments: Approx. 0.4 mm/1 pulse

S-61
● Lens Position Reduction Registration (A-5)
Adjust the leading edge for a reduction copy by changing the engagement timing of the
Synchronizing Roller.

Setting Description Initial Setting Setting Description Initial Setting

40 −10 pulses 51 +1 pulse
41 −9 pulses 52 +2 pulses
42 −8 pulses 53 +3 pulses
43 −7 pulses 54 +4 pulses
44 −6 pulses 55 +5 pulses
45 −5 pulses 56 +6 pulses
46 −4 pulses 57 +7 pulses
47 −3 pulses 58 +8 pulses
48 −2 pulses 59 +9 pulses
49 −1 pulse 60 +10 pulses
50 ±0 ∗

Note: Increments: Approx. 0.2 mm/1 pulse

S-62
● Book B Scan Registration (A-6)
Adjust Book Scan B by changing the engagement timing of the Synchronizing Roller.

Setting Description Initial Setting Setting Description Initial Setting

45 −5 pulses 51 +1 pulse
46 −4 pulses 52 +2 pulses
47 −3 pulses 53 +3 pulses
48 −2 pulses 54 +4 pulses
49 −1 pulse 55 +5 pulses
50 ±0 pulses ∗

Note: Increments: Approx. 0.4 mm/1 pulse

● Lens Position Enlargement Registration (A-11)
Adjust the leading edge for a enlargement copy by changing the engagement timing of the
Synchronizing Roller.

Setting Description Initial Setting Setting Description Initial Setting

40 −10 pulses 51 +1 pulse
41 −9 pulses 52 +2 pulses
42 −8 pulses 53 +3 pulses
43 −7 pulses 54 +4 pulses
44 −6 pulses 55 +5 pulses
45 −5 pulses 56 +6 pulses
46 −4 pulses 57 +7 pulses
47 −3 pulses 58 +8 pulses
48 −2 pulses 59 +9 pulses
49 −1 pulse 60 +10 pulses
50 ±0 ∗

Note: Increments: Approx. 0.8 mm/1 pulse

S-63
● Leading Edge Erase Adjustment (A-12)
Corrects the width of erase on the leading edge of an image by changing the ON timing of the
Image Erase Lamp.

Setting Description Initial Setting Setting Description Initial Setting

45 −5 mm 51 +1 mm
46 −4 mm 52 +2 mm
47 −3 mm 53 +3 mm
48 −2 mm 54 +4 mm
49 −1 mm 55 +5 mm
50 ±0 mm ∗

● Trailing Edge Erase Adjustment (A-13)

Corrects the width of erase on the trailing edge of an image by changing the ON timing of the
Image Erase Lamp.

Setting Description Initial Setting Setting Description Initial Setting

42 −8 mm 51 +1 mm
43 −7 mm 52 +2 mm
44 −6 mm 53 +3 mm
45 −5 mm 54 +4 mm
46 −4 mm 55 +5 mm
47 −3 mm 56 +6 mm
48 −2 mm 57 +7 mm
49 −1 mm 58 +8 mm
50 ±0 mm ∗

S-64
6 LIST OF SETTINGS TO BE MADE DUE TO PARTS REPLACEMENT
Parts Changed Original Drum Original
RAM PC AIDC ATDC Size Exposure Charge Size
Starter
Board Drum Sensor Sensor Detecting Lamp Corona Detecting
Setting Item Sensor Wire Board

Copy Mode Program O — — — — — — — —

User’s Choice Mode O — — — — — — — —
Tech. Rep. Mode O — — — — — — — —
Adjust Mode O — — — — — — — —
F5 Mode O O — O — — O — —
F7 Mode O — — — — O — — O
FF Mode — — O — O — — — —
"PC Drum" in the
Port/Option Counter — O — — — — — — —
cleared
"Starter" in the
Port/Option Counter — — O — O — — — —
cleared
"Charge Wire" in
the Port/Option — — — — — — — O —
Counter cleared
Initialize O — — — — — — — —
Memory Clear O — — — — — — — —

O: Setting made —: No setting

S-65
 Copyright
1994 MINOLTA CO., LTD
Printed in Japan

Use of this manual should

be strictly supervised to
avoid disclosure of
confidential information.

MINOLTA CO., LTD. 1134-7987-11 94071850

Printed in Japan
EP3050/EP4050

TROUBLESHOOTING
 CONTENTS
1 1 INTRODUCTION
1-1. General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-1
1-2. How to Use This Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-1
1-3. Reading the Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-1

2 2 PAPER TRANSPORT FAILURE

1. Paper Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-6

2. Types of Misfeed Detection and Detection Timings . . . . . . . . . . . T-9

3. Misfeed Clearing Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-11

3-1. Copier Take-Up Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-11
3-2. Transport/Separator Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . T-16
3-3. Multi Bypass Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-20
3-4. Fusing/Exit Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-23
3-5. PF-202 Paper Feed Cabinet Take-Up Misfeed . . . . . . . . . . . T-25
3-6. PF-102 Paper Feed Cabinet Take-Up Misfeed . . . . . . . . . . . T-29
3-7. Duplex Unit Vertical Transport/Entry Misfeed . . . . . . . . . . . . T-32
3-8. Duplex Unit Take-Up Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . T-40

3 3 MALFUNCTIONS

1. Detection Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-45

2. Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-66

2-1. C0000: Main Drive Motor M1’s Failure to Turn
C0010: Main Drive Motor M1 Turning at Abnormal
C0010: Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-66
2-2. C0040: Suction Fan Motor M4’s Failure to Turn
C004A: Original Glass Cooling Fan Motor M5’s Failure to
C004A: Turn
C004b: Original Glass Cooling Fan Motor M5 Turning at
C004b: Abnormal Timing
C004c: Exhaust Fan Motor M3’s Failure to Turn
C004d: Exhaust Fan Motor M3 Turning at Abnormal
C004d: Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-68

i
 CONTENTS
2-3. C0070: Main Hopper Toner Replenishing Motor M8’s
C0070: Failure to Turn
C0071: Main Hopper Toner Replenishing Motor M8 Turning
C0071: at Abnormal Timing
C0072: Sub Hopper Toner Replenishing Motor M9’s Failure
C0072: to Turn. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-74
2-4. C0100: Charge Corona Wire Winding Failure . . . . . . . . . . . . T-76
2-5. C0200: PC Drum Charge, Image Transfer/Paper Separator
C0200: Coronas Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-77
2-6. C03XX: (Control Board, Harness malfunction) . . . . . . . . . . . T-78
2-7. C0400: Exposure Lamp LA1’s Failure to Turn ON
C0410: Exposure Lamp LA1 Turning ON at Abnormal
C0410: Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-79
2-8. C0500: Warming-Up Failure
C0510: Abnormally Low Fusing Temperature
C0520: Abnormally High Fusing Temperature
C0522: Fusing Front/Rear Thermistor TH1/2 Malfunction . . T-81
2-9. C0600: Scanner Motor M2 Malfunction
C0601: SCP Board PWB-J Malfunction
C0650: Scanner Reference Position Sensor PC81
C0650: Malfunction
C0660: Scanner Load Failure
C06F0 to C06F7: SHOME, BASE, TRON, SCEND Signal
C06F0 to C06F7: Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-84
2-10. C0610: Lens Motion Failure
C0620: 4th/5th Mirrors Motion Failure . . . . . . . . . . . . . . . . . T-86
2-11. C0910: 2nd Drawer Paper Lift-Up Failure
C0914: 2nd Drawer Paper Lift-Up Motor M14’s Failure
C0914: to Turn
C0920: 1st Drawer Paper Lift-Up Failure
C0924: 1st Drawer Paper Lift-Up Motor M13’s Failure
C0924: to Turn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-88
2-12. C0911: 2nd Drawer Paper Lower-Down Failure
(Inch Area) C0912: 2nd Drawer Paper Lower-Down Failure,
C0912: 2nd Drawer Lock Failure
C0913: 2nd Drawer Lock Failure
C0916: 2nd Drawer Lock Release Failure . . . . . . . . . . . . . . T-91

ii
 CONTENTS
2-13. C0921: 1st Drawer Paper Lower-Down Failure
(Inch Area) C0922: 1st Drawer Paper Lower-Down Failure,
C0922: 1st Drawer Lock Failure
C0923: 1st Drawer Lock Failure
C0926: 1st Drawer Lock Release Failure . . . . . . . . . . . . . . T-94
2-14. C0E00: Main Erase Lamp LA3’s Failure to Turn ON
C0E01: Main Erase Lamp LA3 Turning ON at Abnormal
C0E01: Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-97
2-15. C0E20: Image Erase Lamp LA2’s Failure to Turn ON . . . . T-99
2-16. C0F02: Original Size Detecting Board UN2 Malfunction
C0FE1 to C0FFF: Original Size Detecting Sensor
C0FE1 to C0FFF: Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . T-100
2-17. C0F10: AE Sensor Board PWB-H Malfunction . . . . . . . . . . T-102
2-18. C0F20: AIDC Sensor UN3 Variation Correction Failure
C0F21: AIDC Sensor UN3 Contamination Correction
C0F21: Failure
C0F22: AIDC Sensor UN3 Vg Correction Failure
C0F23: AIDC Sensor UN3 Exposure Correction Failure . . T-103
2-19. C0F30: ATDC Sensor UN4 Failure
C0F31: ATDC Sensor UN4 Failure. . . . . . . . . . . . . . . . . . . . T-104
2-20. C0900: 3rd Drawer Paper Lift-Up Failure
C0904: 3rd Drawer Paper Lift-Up Motor M24’s Failure to
C0904: Turn
C0950: 4th Drawer Paper Lift-Up Failure
C0954: 4th Drawer Paper Lift-Up Motor M25’s Failure to
C0954: Turn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-105
2-21. C0990: Main Tray Upward Motion Failure
C0991: Main Tray Downward Motion Failure
C0992: Main Tray Downward Motion Failure
C0993: Main Tray Upward Motion Failure
C0994: Main Tray Elevator Motor M26’s Failure to Turn . . T-109
2-22. C0998: Shifter Transfer Failure
C0999: Shifter Return Failure
C099A: Shifter Return Failure
C099b: Shifter Transfer Failure
C099c: Shift Motor M27’s Failure to Turn . . . . . . . . . . . . . . T-112
2-23. C0996: 3rd Drawer Lock Release Failure
C0F79: Paper Empty Sensor Failure . . . . . . . . . . . . . . . . . . T-115

iii
 CONTENTS
2-24. C0d00: Duplex Unit Front/Rear Edge Guide Plates
C0d00: Home Position Detection Failure
C0d20: Duplex Unit Trailing Gate Unit Home Position
C0d20: Detection Failure
C0d50: Duplex Unit Drive Motor M31’s Failure to Turn
C0d51: Duplex Unit Drive Motor M31 Turning at Abnormal
C0d51: Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-119

3. Power is not Turned ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-122

iv
 1 PRECAUTIONS FOR HANDLING THE PWBs
1-1. Precautions for Transportation and Storage
a) Before transporting or storing the PWBs, put them in protective conductive cases or bags so that
they are not subjected to high temperature (they are not exposed to direct sunlight.)
b) Protect the PWBs from any external force so that they are not bent or damaged.
c) Once the PWB has been removed from its conductive case or bag, never place it directly on an
object that is easily charged with static electricity (carpet, plastic bags, etc.).
d) Do not touch the parts and printed patterns on the PWBs with bare hands.

1-2. Precautions for Replacement/Inspection

a) Whenever replacing the PWB, make sure that the power cord of the copier has been unplugged.
b) When the power is on, the connectors must not be plugged in or unplugged.
c) Use care not to strap the pins of an IC with a metal tool.
d) When touching the PWB, wear a wrist strap and connect its cord to a securely grounded place
whenever possible. If you cannot wear a wrist strap, touch the metal part before touching the
PWB to discharge static electricity.

S-1
 2 FUNCTIONS OF SWITCHES AND VARIABLE RESISTORS ON PWBs
2-1. PWB Locations

2-2. Master Board (PWB-A)

S-2
 Symbol Name Description
S1A-1 Vacant (Not used) Vacant (Not used)
When the Paper Feed Cabinet is fitted to the
copier, set this switch to the required position
according to the capacity of the Toner
Collection Box.

Paper Feed Collection

S1A-2 Toner Collection Box Select Switch S1A-2
Cabinet Capacity
Not fitted 80 K ON
Fitted 180 K OFF

Initial setting = OFF

VR1A DC4.7V Adjusting Variable Resistor For factory setting. Must not be used.
LD1A Power Voltage Checking LED For visual check on the DC5V output.
LD2A Power Voltage Checking LED For visual check on the DC24V output.

2-3. Power Supply Board (PWB-C)

• When the DT-103 is fitted to the copier, this switch is used to keep the power (DC5V) supplied to
the DT-103 if the Power Switch is turned OFF.

S1C Description Initial Setting

Position A DC5V is shut off when the Power Switch is turned OFF. ∗
Position B DC5V is supplied if the Power Switch is turned OFF.

S-3
2-4. Tech. Rep. Settings Switches Board (PWB-I)

Symbol Name Description

Trouble Reset Switch Used to reset trouble related to Exposure
S1 Lamp malfunction (C04XX) and Fusing
malfunction (C05XX).
VR1 Contrast Adjusting Variable Resistor Used to adjust the contrast of the Display.
Initialize Points Used to forcibly reset a jam/trouble that
occurred due to incorrect operation, etc.
PJ2
when it cannot be reset by opening and
closing the Front Door or pressing S1.
TP1 GND Test Point Ground used for memory clear.
Memory Clear Test Point Used to clear data other than all values
TP2
counted by the Electronic Counters.

S-4
<Point Clearing Procedure>
• Initialize Points (PJ2)
1. Turn the Power Switch OFF.
2. With the PJ2I points (1, 2) shorted, turn the Power Switch ON.
• Memory Clear Test Point (TP2)
1. Turn the Power Switch OFF.
2. With the TP1 and TP2 points shorted, turn the Power Switch ON.

NOTES
• When incorrect display/incorrect operation has occurred, reset and clear it in the following
sequence:
Initialize Points (PJ2) → Memory clear Test Point (TP2)
• When memory has been cleared, each mode must be set again (see below).

<List of Data Cleared by the Switch and Points>

Clearing Method Memory

Front Door Trouble Reset Initialize
Clear Test
Open/Close Switch S1 Points PJ2
Data Cleared Point TP2
Jam display O — O —
Trouble display
O — O —
(other than Exposure/Fusing)
Trouble display
— O O —
(Exposure/Fusing only)
Incorrect display/incorrect operation — — O O
Copy mode program — — — O
User’s choice — — — O
Tech. Rep. choice — — — O
F5/F7 setting — — — O
System setting — — — O
ADF setting — — — O
Level history — — — O
RD mode setting — — — O
Admin. mode — — — O
Adjust mode — — — O

O: Cleared. —: Not cleared.

Note: When memory has been cleared, "Level History" must be selected and the required value
entered into "ATDC Set".

S-5
 3 USER’S CHOICE MODE
• This mode is used by the user to make various settings according to user requirements.

3-1. User’s Choice Mode Menu Screen

• Select the User Mode key on the control panel.

User Mode Exit

Select a function by pressing the

key.

Data Send

Job Memory Zoom Mem- Meter

Input ory Input Count

Toner Re- Drum De- User's

Plenisher humidifier Choice

1134P359CA

• From among the modes displayed, select User’s Choice to enter the User’s Choice mode.
• The User’s Choice mode has a total of six screens. Press any of 1/6, 2/6, 3/6, 4/6, 5/6 and 6/6 to
switch to the required menu screen as described below.

Note: "The selection Data Send" is displayed only when the copier is fitted with the DT-103.

3-2. User’s Choice Mode Setting Procedure

<Setting Procedure>
1. Press the User Mode key on the control panel.
2. Select the desired menu screen from among 1/6, 2/6, 3/6, 4/6, 5/6 and 6/6 displayed at the
bottom of the screen.
3. On the menu screen selected, select the mode to be set and make settings as required.
4. After the settings are complete, press the "Enter" key to enter the settings.
Note: The mode selected is highlighted.

<Leving the Mode>

Perform any one of the following steps.
• Press the Panel Reset Key.
• Press "Exit" on the screen.

S-6
3-3. Settings in the User’s Choice Mode
3-3-1. Menu screen 1/6

User's Choice 1/6 Exit

Select a key to change settings, or

press Pg.# key for additional menu.

Mixed Orig. Detection: OFF

Language Selection: English

Paper Priority: Letter /1

Copy Mode Priority: Auto Size

1/6 2/6 3/6 4/6 5/6 6/6

1134P368EA
1. Mixed Original Detection mode
Used to select "Mixed Original Detection" or "High Speed".
Mixed Orig. Detection ON: APS/AMS is performed for all originals loaded in the
Automatic/Duplexing Document Feeder. (A paper size that can be
loaded both lengthwise and crosswise is acceptable.)
Mixed Orig. Detection OFF: APS/AMS is performed for only the first sheet of paper loaded in the
Automatic/Duplexing Document Feeder.

Screen Display Description Initial Setting

ON Mixed Original Detection enabled (High speed mode disabled)
OFF Mixed Original Detection disabled (High speed mode enabled) ∗

2. Language Selection
Used to specify the language to be displayed on the screen according to the user or area.
<USA/Canada Area>

Initial
Screen Display
Setting
English ∗
French
Spanish
Portuguese

<Europe Area>
Type A Type B Type C

Initial Initial Initial

Screen Display Screen Display Screen Display
Setting Setting Setting
German ∗ Italian ∗ Danish ∗
English Spanish Norwegian
French Portuguese Swedish
Dutch English English

S-7
3. Paper Priority
Used to select the paper in the priority paper source in the AMS or Manual Mode.

Paper Source Initial Setting Paper Source Paper Feed Option Initial Setting
1st Drawer ∗ 3rd Drawer Can be exchanged for the
PF-102/PF-202/PF-2D
2nd Drawer
4th Drawer Paper Feed Cabinet.

Can be exchanged for the

5th Drawer
AD-5.
C-301 Large Capacity Cassette

4. Copy Mode Priority

Used to select the Auto Mode which is given priority when the Power Switch is turned ON or Panel
Reset Key pressed.

Screen Display Initial Setting

Auto Paper ∗
Auto Size
Manual

3-3-2. Menu screen 2/6

User's Choice 2/6 Exit

Select a key to change settings, or

press Pg.# key for additional menu.

Expo. Mode Priority: Auto

Expo. Level Priority: Normal

Manual Expo. Adjust: Mode 1

Finishing Priority Non Sort

1/6 2/6 3/6 4/6 5/6 6/6

1134P370CA
1. Exposure Mode Priority
Used to select the Exposure mode which is given priority when the Power Switch is turned ON or
Panel Reset Key pressed.

Screen Display Initial Setting

Auto ∗
Manual

S-8
2. Exposure Level Priority
• Used to select the auto exposure level in the Auto Exposure mode.
• Used to select the manual exposure level when the Auto Exposure mode has been switched to
the Manual Exposure mode.
<Auto Exposure Level Setting>

Screen Display Description Initial Setting

Lighter Equivalent to EXP. 4.5
Normal Equivalent to EXP. 5.0 ∗
Darker Equivalent to EXP. 5.5

<Manual Exposure Level Setting>

Description Initial Setting Description Initial Setting
EXP. 1 EXP. 6
EXP. 2 EXP. 7
EXP. 3 EXP. 8
EXP. 4 EXP. 9
EXP. 5 ∗ Note: EXP. 1: Lightest
EXP. 9: Darkest

3. Manual Exposure Adjustment

Used to select the exposure voltage level in the Manual Exposure mode according to the type of the
original used.

Screen Display Description Initial Setting

Mode 1 Ordinary/photo originals ∗
Mode 2 Originals other than in Modes 1 and 3
Mode 3 Colored originals

<List of Manual Exposure Voltages Based on Modes>

Manual Exposure Voltage (V)
EXP. 1 2 3 4 5 6 7 8 9
Mode 1 +8 +5 +3 +1 0 −1 −3 −5 −8
Mode Mode 2 +8 +6 +5 +3 0 −2 −4 −6 −8
Mode 3 +8 +7 +6 +4 0 −3 −5 −7 −8

Note: EXP. 5 is a voltage value adjusted automatically in the "F5" mode.

S-9
4. Priority Sort
Used to select the priority exit mode when the copier is fitted with an exit option.

Screen Display Initial Setting

Non Sort ∗
Sort
Sort & Staple
Group

3-3-3. Menu screen 3/6

User's Choice Exit

Select a key to change setting, or

press Pg.# Key for additional menu.
Auto Panel Reset: 1min.

Energy Saver Mode: OFF

Drum Dehumidifier: OFF

Counter Removal: ON

1/6 2/6 3/6 4/6 5/6 6/6

1134S029CA

1. Auto Panel Reset

Used to select "the Reset Timing" or "No Reset" to the initial mode at the end of a copy cycle or a
given period of time after the final key is pressed.

Screen Display Initial Setting

1 min. ∗
2 min.
3 min.
5 min.
No Reset

S-10
2. Energy Saver Mode
Used to turn "ON" or "OFF" the Energy Saver Mode. Set the time for this Mode when "ON" is
selected.

Description Initial setting

1 to 10 min.
OFF ∗

<Procedure>
• To select "ON", enter the required value from the 10-key pad. When the value entered is wrong,
press the Clear Key to clear the value to zero. Then, enter a correct value.
• To select "OFF", press "OFF" on the screen.

3. Drum Dehumidifier
Used to turn "ON" or "OFF" the Drum Dehumidifier when the Power Switch is turned ON.

Screen Display Initial Setting

ON (Auto)
OFF ∗

4. Counter Removal
Used to turn "ON" or "OFF" the reset function when the Plug-In Counter/Magnetic Card (D-102) is
pulled out.

Screen Display Description Initial Setting

ON Reset to the initial mode. ∗
OFF Not reset to the initial mode.

S-11
3-3-4. Menu screen 4/6

User's Choice Exit

Select a key to change setting, or

press Pg.# Key for additional menu.
Intelligent Sort: ON

Confirmation Beep: ON

Original Thickness: Standard

Smaller Originals: EnableCopy

1/6 2/6 3/6 4/6 5/6 6/6

1134S030CA

1. Intelligent Sort
Used to turn "ON" or "OFF" the Intelligent Sort function (which automatically switches between Sort
and Non Sort according to the number of documents) when a paper exit option is fitted to the copier
and used with an Automatic/Duplexing Document Feeder.
<When set to ON>
• When the number of documents is 1, Non Sort is selected.
• When the number of documents is 2 or more, Sort is selected.

Screen Display Description Initial Setting

ON Switched automatically. ∗
OFF Not switched automatically.

Note: The Intelligent Sort mode functions when APS/AMS is selected with the Intelligent Sort mode
set to "ON" and the "Mixed Orig. Detection" set to "OFF (high speed)".

2. Confirmation Beep
Used to turn "ON" or "OFF" the Confirmation Beep when any of the keys on the control panel or the
Mode Keys on the screen is pressed.

Screen Display Description Initial Setting

ON Beep sounds. ∗
NO Beep does not sound.

3. Original Thickness
Used to select between bringing and not bringing originals fed by the Automatic/Duplexing
Document Feeder to a stop against the Original Scale.

Screen Display Description Initial Setting

Stopped against the Original
Standard
Scale.
∗
Not stopped against the Original
Thin
Scale.

S-12
4. Smaller Originals
Used to turn "ON" or "OFF" the copying of originals of the minimum detectable size (less than A5
lengthwise).

Screen Display Description Initial Setting

Originals are copied onto paper
ON fed through the priority paper ∗1
source.
Warning is displayed and copying
OFF
is disabled.
∗2

∗1: Europe Area, ∗2: USA/Canada Area

3-3-5. Menu screen 5/6

User's Choice Exit

Select a key to change setting, or

press Pg.# Key for additional menu.
Custom 2in1:

Custom 2in1 Separation:

Custom Book Copy:

Special Paper:

1/6 2/6 3/6 4/6 5/6 6/6

1134S031CA

1. Custom 2-in-1
Used to specify the priority modes (Paper, Zoom, Margin, Erase) when 2-in-1 is selected.

Mode Description Initial Setting

Paper Auto paper/select a give drawer Auto paper
Zoom Fixed zoom ratio ×0.707
Position : Right side/left side
Margin Mode : Full size (shift)/reduction No setting
Width : 10 mm/15 mm/20 mm
Position : Right side/left side/frame erase/upper side
Erase (feeding direction)/center No setting
Width : 10 mm/15 mm/20 mm

Note: When the erase position is set to the frame erase or upper side (feeding direction), the erase
width is automatically fixed at 10 mm.

S-13
2. Custom 2-in-1 Separation
Used to specify the priority modes (Paper, Zoom, Margin, Erase) when 2-in-1 Separation is selected.

Mode Description Initial Setting

Paper Auto paper/select a give drawer Auto paper
Zoom Fixed zoom ratio ×1.414
Position : Right side/left side
Margin Mode : Full size (shift)/reduction No setting
Width : 10 mm/15 mm/20 mm
Position : Right side/left side/frame erase/upper side
Erase (feeding direction)/center No setting
Width : 10 mm/15 mm/20 mm

Note: When the erase position is set to the frame erase or upper side (feeding direction), the erase
width is automatically fixed at 10 mm.

3. Custom Book Copy

Used to specify the priority modes (Paper, Zoom, Margin, Erase) when Book Copy is selected.

Mode Description Initial Setting

Paper Select a give drawer 1st Drawer
Zoom Fixed zoom ratio ×1.000
Position : Right side/left side
Margin Mode : Full size (shift) No setting
Width : 10 mm/15 mm/20 mm
Position : Right side/left side/frame erase/upper side
Erase (feeding direction)/center No setting
Width : 10 mm/15 mm/20 mm

Note: When the erase position is set to the frame erase or upper side (feeding direction), the erase
width is automatically fixed at 10 mm.

S-14
4. Special Paper
Used to specify the type of paper loaded in each paper source.

Screen Display
S0: Normal
S1: Recycled
S2: Insert Paper
S3: Not for 2-Sided The initial settings are all S0.

<Procedure>
• Select the paper source to be set and press the key on the screen to change the displayed paper
type as shown below:

S0 S1 S2 S3

<APS/Automatic Paper Source Switching Operation>

Automatic Paper Source Switching

Special Paper APS
(Paper of the same type only)
S0: Normal O O
S1: Recycled O Note 1 O
S2: Insert Paper — —
S3: Not for 2-Sided O Note 2 O Note 2

O: Functions.
—: Does not function.

Note 1: A warning is displayed and a copy cycle is started by pressing the Start Key.
Note 2: Automatic switching is performed only in the 1-sided copy mode.

S-15
3-3-6. Menu screen 6/6

User's Choice Exit

Select a key to change setting, or

press Pg.# Key for additional menu.
CopyTrack: OFF

User Help:

Max. Copy Sets: OFF

1/6 2/6 3/6 4/6 5/6 6/6

1134S032CA

1. Copy Track
Used to turn "ON" or "OFF" the Copy Track function per account (max. 26 accounts).

Screen Display Description Initial Setting

ON Copy Track is made.
OFF Copy Track is not made. ∗

<When ON is selected>
When the Access # is set by the administrator for each account, the number of copy cycles per
account is monitored. (A simple form of the D-102 function is provided.)

User's Choice

For each Account #, you can assign/

change Access # or reset counters.

CopyTrack Enter Exit

Account #
18
Access #
1234

Total Count Size Count

148839 478

1134S033CA

<Setting Procedure>
1. Select "ON" and press the "Enter" Key.
2. Press the ▼ / ▲ key to access the Account # to be administrated. (Max. 26 accounts)
3. Press the Access # key and register the access number corresponding to the above Account #
from the 10-key pad. (Max. 4 digits)
Note: If the access number has been changed or the number entered is wrong, press the Clear Key
to clear the number and re-enter.
4. Press the "Enter" Key to enter the access number.
Note: When a copy is to be made after the access number has been entered, the access number
must be entered and the Access # Key pressed to enter the copy mode.
<Counter Clearing Method>
• Select the counter to be cleared and press the Clear Key.

S-16
2. User Help
When the user sends a User Help code according to the status of the copier fitted with the DT-103,
this function transmits that status to the center.

<Setting Procedure>
• Enter a 3-digit value from the 10-key pad (max. six codes).
Note: To transmit the User Help code, enter the value and press "Data Send" on the User Mode
screen.

3. Max. Copy Sets

Used to turn "ON" or "OFF" the maximum number setting of copy cycles.
Select "ON" to limit the number of copy cycles that can be performed in a single copy operation.

Description Initial Setting

1-99
OFF ∗

<Setting Procedure>
• To set the maximum number of copy cycles, enter the required value (1 to 99) from the 10-key
pad (without pressing any key on the screen). When it is not desired to set the maximum number,
select "OFF" on the screen.

S-17
 4 TECH. REP. MODE
• This mode is used by the Tech. Rep. to set, confirm, adjust and/or register various Tech. Rep.
functions.

4-1. Tech. Rep. Mode Menu Screen

Tech. Rep. Mode Menu Exit

Function ROM Version

Tech. Rep. Choice RD Mode

System Input ADF Check

Counter Level History

I/O Check Machine status

Last Trouble Admin. Mode

1134S034CA

4-2. Tech. Rep. Mode Setting Procedure

<Setting Procedure>
1. Place the copier in the Tech. Rep. mode by pressing the following Keys:

Stop Key → "0" → Stop Key → "1"

2. Select the mode to be set from among those displayed on the Tech. Rep. Mode Menu screen.
3. Make various mode settings according to the screens selected.
<Living the Mode>
• Press the Panel Reset Key.

S-18
4-3. Settings in the Tech. Rep. Mode
1. Function
• Used to adjust/confirm various Tech. Rep. functions.

Function Menu

F1 PaperPassage F7 Orig. Sensor

F2 Drum/Trans F8 ATDC Adiust

F3 Exp. Lamp

F4 HV Separator

F5 Optimum & AE FF F8 F5

F6 Edit Ref. Adj

1134S035CA

1-1. Function mode setting procedure

<Setting Procedure>
1. Select "Function".
2. Select the function mode to be adjusted/confirmed.
3. Press the Start Key to start the operation of the corresponding mode.
4. Press the Stop Key to stop the operation.

1-2. Settings in the Function mode

● F1 (Paper Passage)
This test can be initiated without having to wait for warm-up to complete.
<Operation time>
• This test continues until the Drawer or port selected for use runs out of paper.
• This test continues until the Stop Key is pressed.
● F2 (Drum/Trans)
Used to confirm the output of the High Voltage Unit (HV) for Drum Charge/Image Transfer
Coronas. (For factory setting)
<Operation time>
• This function runs for 30 seconds.
• This function runs until the Stop Key is pressed.
● F3 (Exp. Lamp)
Used to confirm that the Exposure Lamp is lit.
<Operation time>
• This test runs for 30 seconds.
• This test runs until the Stop Key is pressed.

S-19
● F4 (HV Separator)
Used to confirm the output of the High Voltage Unit (HV) for the Paper Separator Corona. (For
factory setting)
<Operation time>
• This function runs for 60 seconds.
• This function runs until the Stop Key is pressed.
● F5 (Optimum & AE)
Used to make Vg level adjustment, manual optimum exposure adjustment, and automatic AE
Sensor optimum exposure adjustment.
<Operation time>
• This function runs for 30 seconds.
• This function runs until the Stop Key is pressed.
● F6 (Edit Ref. Adj)
Used to adjust the edit position according to the pattern output by the Image Erase Lamp.
<Operation time>
• This function runs for one copy cycle.
● F7 (Orig. Sensor)
Used to automatically adjust the Original Size Detecting Sensor.
<Operation time>
• This function continues until the adjustment ends.
● F8 (ATDC Adjust)
This function agitates the developer to automatically adjust the ATDC Sensor level.
<Operation time>
• This function runs for 3 minutes.
• This function runs until the Stop Key is pressed.
● FF (F8 + F5)
Used to execute the F8 and F5 modes (at the time of set-up).
<Operation time>
• This function runs for 3 minutes 30 seconds.
• This function runs until the Stop Key is pressed.

S-20
1-3. Components energized in the Function mode

Mode
F1 F2 F3 F4 F5 F6 F7 F8 FF
Component
Main Drive Motor O O O O O O — O O
Fan Motors O O O O O O — O O
Toner Replenishing Motor O — — — — O — — —
Scan O — O — O O — — O
Paper Feed O — — — — O — — —
Drum Charge/Image Transfer Coronas O O O — O O — O —
Paper Separator Corona O — O O O O — O O
Developing Bias O — O O O O — O O
Exposure Lamp O — O — O — — — O
Main Erase Lamp O O O O O O — O O
Image Erase Lamp O — O — O O — O O
Paper Separator Finger O — — — — O — — —
Jam detection O — — — — O — — —
Malfunction detection O O O O O O O O O

O : Energized
—: Not energized

S-21
2. Tech. Rep. Choice
• Used by the Tech. Rep. to make adjustments and confirmations of various Tech. Rep. functions.

Tech. Rep. Choice Enter Tech. Rep. Choice BackUp Enter

Tech. Rep. Choice 1 Tech. Rep. Choice 2

Plug-In Counter # of Sheets Auto Paper Config. Inch/Metric

Size Counter A3 Sorter Trouble Enable Copy
Total Counter Mode 0 Leading Edge Erase Yes
Maintenance Call NO Trailing Edge Erase Yes
Copy Kit Counter NO Loop Adjust (Drawer) 50
Toner Empty Stop Disable Loop Adjust (Man/LCT) 50

# of Sheets Copy Cycle Inch/Metric Inch

Next Next

1134S036CA 1134S037CA

Tech. Rep. Choice BackUp Enter

Tech. Rep. Choice 3

Exp. Lamp Manual Adj. 50
ATDC T/C Ratio 50

47-54

1134S038CA

2-1. Tech. Rep. Choice mode setting procedure

<Setting procedure>
1. Select the Tech. Rep. mode.
2. Using ▼ / ▲ key, select the mode to be set/adjusted.
Note: Press the "Next"/"Back Up" key to switch the screen from one to another.
▲
▼

3. Using the / key, specify the function to be set.

4. Press the "Enter" Key to enter the set function.

2-2. Settings in the Tech. Rep. Choice mode

● Plug-In Counter
Used to select the counting method of the Plug-In Counter.

Screen Display Initial Setting

# of Sheets ∗
Copy Cycle

Note: For the counting methods, see the Count-Up List on the next page.

S-22
● Size Counter
Used to select the paper size counted by the Paper Size Counter.

<Metric Area> <Inch Area>

Screen Initial Screen Initial Screen Initial Screen Initial

Display Setting Display Setting Display Setting Display Setting
No A3/B4 No 11×14+LGR
A3 ∗ A3/B4 11 × 17 ∗ 11×14+LGR

Note: For the counting methods, see the Count-Up List given below.
● Total Counter
Used to select the counting method of each Counter according to the paper size and copy mode.

Screen Display Description Initial Setting

Mode 0 1 count per 1 copy cycle ∗
Multiple count-up according to the paper size and
Mode 1
copy mode
Multiple count-up according to the paper size and
Mode 2
copy mode

Note: For the counting methods, see the Count-Up List given below.

<Count-Up List>

Copy Mode 1-Sided 2-Sided

Sizes Sizes
Size Counter other than Sizes set other than Sizes set Manual
those set those set Feeding
Mode 0

Mode 1
Mode 2

Mode 0

Mode 1

Mode 2

Mode 0

Mode 1

Mode 2

Mode 0
Mode 1

Mode 2

Total Counter

Total Counter
1 1 2 2 2 2 4 4 1
(Mechanical/Electronic)
Size Counter (Electronic) 0 1 1 2 0 2 2 0 0
Two-Sided Total Counter
0 0 1 1 2 1 1 4 0
(Electronic)
Two-Sided Size Counter
0 0 0 1 1 4 0
(Electronic)
Plug-In # of sheets 1 1 2 2 1 2 2 1 4 4 1
Counter # of copy
(Mechanical) 1 1 2 2 2 2 4 4 1
cycles

0: No count 1: 1 count 2: 2 counts 4: 4 counts

S-23
<Setting of the Tech. Rep. Choice Mode When the D-102 Is Installed on the Copier>
• When the D-102 is fitted to the copier, set the Tech. Rep. Choice Mode as follows according to
the count-up mode of the D-102.

Tech. Rep. Choice Mode (Copier)

Count-Up Mode
(D-102) Plug-In Counter Total Counter
# of sheets # of copy cycles Mode 0 Mode 1
All Size Mode — O O O
Size Mode I
Size Mode II
Full Color Mode I O — O —
Mono Color Mode I
Special Mode I
2-Sided Mode I
2-Sided Mode II
Full Color Mode II — O O —
Mono Color Mode II
Special Mode II

O : Setting acceptable
—: Setting inhibited

● Maintenance Call
Used to select "YES" or "NO" for the Maintenance Call display when the Maintenance Counter
reaches the set count.

Screen Display Initial Setting

Yes
No ∗

Note: There are five different Maintenance Counters (up to five Counters may be set). When any of
the Maintenance Counters has reached the set count the Maintenance Call message is
displayed together with the inspection code "M1".

S-24
● Copy Kit Counter
Used to select "Yes" or "No" for "Copy Kit" counting by the Consumables Counter or to "Enable"
or "Disable" a copy cycle when the Counter reaches the set count.

Screen Display Description Initial Setting

No No count ∗
Copy enabled when the Counter reaches
Mode 1
the set count.
Copy disabled when the Counter reaches
Mode 2
the set count.

Note: Select Mode 1 or 2 to start the Copy Kit Counter counting. If "No" has been set for
Maintenance Call, the Maintenance Call message is displayed together with the inspection
code "M4" when the Counter reaches the set count.

● Toner Empty Stop

Used to select "Disable Copy" or "Enable Copy" after a Toner Empty condition is detected.

Screen Display Initial Setting

Enable Copy
Disable Copy ∗

Note: When "Disable Copy" has been selected, the copy cycle is inhibited on detection of a 2% or
less toner-to-carrier ratio.

● Auto Paper Config.

Used to automatically select "Metric or Inch" paper or "Metric" paper for the original size detected .

Screen Display Description Initial Setting

The copier automatically selects metric or
Metric/Inch ∗
inch paper for the original detected.
The copier automatically selects metric
Metric
paper for all originals detected.

S-25
● Sorter Trouble
Used to select "Enable Copy" or "Disable Copy" when a malfunction of the paper exit option is
detected.

Screen Display Description Initial Setting

Copy is enabled after detection of a
Enable Copy
malfunction.
∗
Copy is disabled after detection of a
Disable Copy
malfunction.

Note: If a malfunction has already been detected when "Enable Copy" is selected, a warning is
displayed only when the malfunctioning Mode detected is selected, and the Mode selected is
not accepted.

● Leading Edge Erase

Used to select "Yes" or "No" for the Leading Edge Erase function.
Note: When "Yes" is selected, the erase width is approx. 3 mm.

Screen Display Initial Setting

Yes ∗
No

● Trailing Edge Erase

Used to select "Yes" or "No" for the Trailing Edge Erase function.

Screen Display Initial Setting

Yes ∗
No

Note: When "Yes" is selected, the erase width is approx. 3 mm.

● Loop Adjust (Drawer)

Used to adjust the loop length (before the Synchronizing Roller) of the paper fed from any of the
1st to 5th Drawers.

Code Loop Length Initial Setting Code Loop Length Initial Setting
47 Approx. 4 mm 51 Approx. 12 mm
48 Approx. 6 mm 52 Approx. 14 mm
49 Approx. 8 mm 53 Approx. 16 mm
50 Approx. 10 mm ∗

S-26
● Loop Adjust (Man/LCT)
Used to adjust the loop length (before the Synchronizing Roller) of the paper fed manually or
from the paper feed option.

Code Loop Length Initial Setting Code Loop Length Initial Setting
47 Approx. 4 mm 51 Approx. 12 mm
48 Approx. 6 mm 52 Approx. 14 mm
49 Approx. 8 mm 53 Approx. 16 mm
50 Approx. 10 mm ∗

● Exp. Lamp Manual Adj.

Used to make fine-adjustment of the Lamp voltage in the Manual Exposure mode. When an
optimum manual exposure level cannot be achieved by the execution of the "F5" function mode
after the replacement of the PC Drum, etc., adjust the Exposure Lamp voltage in the range of −6
to +6V.

Variable Voltage Variable Voltage

Code Initial Setting Code Initial Setting
Value Value
44 −6V 51 +1V
45 −5V 52 +2V
46 −4V 53 +3V
47 −3V 54 +4V
48 −2V 55 +5V
49 −1V 56 +6V
50 0V ∗

Note: After the setting of this mode has been changed, the "F5" mode must be executed.

● ATDC Level
Used to specify the control level of the ATDC.

Code T/C Ratio Initial Setting Code T/C Ratio Initial Setting
47 4.5% 51 6.5%
48 5.0% 52 7.0%
49 5.5% 53 7.5%
50 6.0% ∗ 54 8.0%

S-27
3. System Setting
• This mode is used to set the fixed zoom ratio, paper size input, marketing area and Plug-In
Counter, or to advance the Drum Charge Corona Wire.

System Input Menu

Change Fixed Zoom Ratio

Paper Size Input

Marketing Area

Plug-In Counter

Advance Charge Wire

Telephone # Input

1134S039CA

3-1. System Setting setting procedure

<Setting procedure>
1. Select "System Setting".
2. Select the mode to be set.
3. Make the various settings according to the screens selected.

3-2. Settings in the System Setting mode

● Change Fixed Zoom Ratio
Used to reset a fixed zoom ratio to a desired value within the range ×0.500 to ×2.000.
<Setting procedure>
1. Select the fixed zoom ratio to be changed and clear it with the Clear Key.
Note: If the ratio cleared is not the one to be cleared, press the Panel Reset Key to return to the
preceding zoom ratio.
2. Using the 10-key pad, set the desired zoom ratio within the range ×0.500 to ×2.000.
3. Press the "Enter" Key on the screen to enter the zoom ratio set.
● Paper Size Input
Used to set the paper size used in the corresponding paper source.
<Setting procedure>
1. Select the paper source for which you want to set the paper size (on the paper Size Input 1
screen).
2. When the paper source is selected, the display automatically switches to the Paper Size Input 2
screen. Using the ▼ / ▲ key, select the paper used in the paper source selected, and press the
"Enter" key.

S-28
● Marketing Area
Used to change the paper size/fixed zoom ratio according to the marketing area.

Screen Display Initial Setting Screen Display Initial Setting

MJ ∗ MC
MH Others

Note: When the marketing area has been changed, the copier must be initialized.
● Plug-In Counter
Used to disable or enable the copier depending on whether or not a Plug-In Counter or Magnetic
Card is used when the copier is equipped with a Plug-In Counter or D-102.

Screen Display Description Initial Setting

The copier is disabled when the Plug-In
ON
Counter or Magnetic Card is removed.
The copier remains enabled even when
OFF the Plug-In Counter or Magnetic Card is ∗
removed.

Note: "ON" should be selected when the copier is equipped with a Plug-In Counter or D-102.
● Advance Charge Wire
Used to advance the Drum Charge Corona Wire to prevent uneven charging due to the Drum
Charge Corona Wire contaminated, etc.
<Operation procedure>
• Press the "Enter" key to advance the Drum Charge Corona Wire by six counts.
Note: The number of advance cycles of the Drum Charge Corona Wire is displayed at "Charge
Wire" on the Port/Option 3/3 screen. The maximum number of advance cycles is 185. If this
value is exceeded, the advance operation is disabled.
● Telephone # Input
Used to register the telephone number of the Tech. Rep. so that the telephone number registered
is displayed when a malfunction occurs or a Maintenance Call is displayed.
<Setting procedure>
• Press the Clear Key and register the telephone number using the 10-key pad (up to 19 digits).
Note: Use the Interrupt Key to register "—".

S-29
4. Counter
• This mode is used by the Tech. Rep. to set the counts of the Maintenance Counter and
Consumables Counter or to show the counts of various counters.

Counter Menu

Paper Port/Option

Jam Consumable

Retry Auto CPU Reset

Trouble

Maintenance

1134S040CA

4-1. Counter setting procedure

<Setting procedure>
1. Select "Counter".
2. Select the mode to be set/displayed.
3. Set or clear the count according to the screen selected.

4-2. Settings in the Counter mode

● Paper
Counts the number of sheets copied on a paper size/type basis (S0: standard paper, S1: recycled
paper, S2: special paper, S3: 2-sided disabled paper).
Note: For such a paper size as A4 which can be loaded both lengthwise and crosswise, the count
represents the sum of both.

<Paper Counter 1/2> <Paper Counter 2/2>

Paper Size Paper Type

A3 11 × 17 S0
B4 11 × 14 S1
A4 Legal S2
B5 Letter S3
A5 5-1/2 × 8-1/2
B6 FLS

<Clearing procedure>
• Using the ▼/▲ key, select the paper size or paper type to be cleared and press the Clear Key.
Note: If the paper size or paper type has been cleared accidentally, press the Interrupt Key to return
the counter to the count it had before clearing.

S-30
● Jam
Counts the number of jams that occurs in the copier or entire system (MCBJ) and per section.

<Jam Counter 1/3> <Jam Counter 2/3>

Screen Display Description Screen Display Description

Jam occurrence ratio in Number of jams that
MCBJ System
the system 4th Drawer occurred at the 4th
Drawer
Jam occurrence ratio in
MCBJ Machine Only
the copier only Number of jams that
5th Drawer occurred at the 5th
Number of jams that
Drawer
Manual Feed occurred at the Manual
Feed Section Number of jams that
Dup Entrance occurred at the Duplex
Number of jams that
Unit Entry
1st Drawer occurred at the 1st
Drawer Number of jams that
Dup Exit occurred at the Duplex
Number of jams that
Unit Exit
2nd Drawer occurred at the 2nd
Drawer Number of jams that
Vertical Trans. occurred in the
Number of jams that
Transport section
3rd Drawer occurred at the 3rd
Drawer Number of jams that
Horizontal Trans. occurred in the Paper
Separator section

Note: MCBJ = Total Counter value ÷ Jam Counter value

<Jam Counter 3/3>

Screen Display Description

Number of jams that
Exit occurred at the Exit
section
Number of jams that
Sorter occurred in the paper
exit option
Number of jams that
ADF
occurred in the ADF
Number of jams that
Note: When the PF-102 Paper Feed Cabinet is
occurred in the Large
LCT fitted to the copier, the count is displayed
Capacity Cassette on
as the 3rd Drawer.
C-301 section

<Clearing procedure>
• Using the ▼/▲ key, select the count to be cleared and press the Clear Key.
Note: If the count has been cleared accidentally, press the Interrupt Key to return the counter to the
count it had before clearing.

S-31
● Retry
Counts the number of feed retries which are made when no paper reaches the Paper Take-Up
Sensor in a given period of time in order to reduce misfeeds (jams) caused by slip, etc. of the
Paper Take-Up Roll.

Screen Display Description

Number of feed retries
1st Drawer
in the 1st Drawer
Number of feed retries
2nd Drawer
in the 2nd Drawer
Number of feed retries
3rd Drawer
in the 3rd Drawer
Number of feed retries
4th Drawer
in the 4th Drawer
Number of feed retries
5th Drawer
in the 5th Drawer
Number of feed retries
Dup
in the Duplex Unit
Number of feed retries
LCT in the Large Capacity
Cassette on C-301

<Clearing procedure>
• Using the ▼/▲ key, select the port to be cleared and press the Clear Key.
Note: If the count has been cleared accidentally, press the Interrupt Key to return the counter to the
count it had before clearing.
● Trouble
Counts the number of malfunction occurrences in each section.

<Trouble 1/7>

Screen Display
Description
Code Location
C000X Main Drive Motor Main Drive Motor rotation malfunction
C0040/1 Suction Fan Motor Suction Fan Motor rotation malfunction
C004A/b Optical Cooling Fan Motor Optical Cooling Fan Motor rotation malfunction
C004C/d Ventilation Fan Motor Ventilation Fan Motor rotation malfunction

S-32
 <Trouble 2/7>

Screen Display
Description
Code Location
Main Hopper Toner Replenishing Motor rotation
C0070/1 Main Hopper Motor
malfunction
Sub Hopper Toner Replenishing Motor rotation
C0072/3 Sub Hopper Motor
malfunction
Drum, Image Transfer, Paper Separator Corona
C0200 PC Charge Corona
malfunction
C0210 Image Transfer Corona Not detected
C03XX Control Board/Harness Control Board, Harness malfunction

<Trouble 3/7>

Screen Display
Description
Code Location
C04XX Exposure Lamp Exposure Lamp ON malfunction
C050X Fuser Warm-Up Warming-up malfunction
C051X Fuser Low Temp. Abnormally low fusing temperature
C052X Fuser High Temp. Abnormally high fusing temperature
C060X Scanner Drive System Scanner Motor/SCP Board malfunction
C061X Lens Drive System Lens drive malfunction
C0620 Mirror Drive System Mirror drive malfunction
C0650 Scanner Sensor Scanner Reference Position Sensor malfunction

S-33
 <Trouble 4/7>

Screen Display
Description
Code Location
C0660 Scanner System Scanner load malfunction
C06FX Scanner Interface Scanner Interface malfunction
C090X 3rd Drawer 3rd Drawer malfunction (PF-101/PF-202)
C091X 2nd Drawer 2nd Drawer malfunction
C092X 1st Drawer 1st Drawer malfunction
C095X 4th Drawer 4th Drawer malfunction (PF-202)
C0990-6 LCC Main-Tray PF-102 malfunction
C0998-d LCC Shift System PF-102 malfunction

<Trouble 5/7>

Screen Display
Description
Code Location
C09CX LCT C-301 malfunction
C0E0X Main Erase Lamp Main Erase Lamp ON malfunction
C0E20 Auxil. Erase Lamp Image Erase Lamp ON malfunction
C0F02 Orig. Size Det. CPU Original Size Detecting Board malfunction
C0F10 AE Sensor AE Board malfunction
C0F2X AIDC Sensor AIDC Sensor malfunction
C0F3X ATDC Sensor ATDC Sensor malfunction

S-34
 <Trouble 6/7>

Screen Display
Description
Code Location
C0F79 Paper Empty Sensor PF-102 Paper Empty Sensor malfunction
C0FE/FX Orig. Size Det. Sensor Original Size Detecting Sensor malfunction
C0b0X Sorter (Transport) Sorter transport malfunction
C0b1X Sorter (Chuck) Sorter Chuck movement malfunction
C0b3X Sorter (Guide) Sorter Paper Aligning Motor malfunction
C0b5X Sorter (Stapler) Stapler malfunction
C0b6X Sorter (Bin Shift) Bin movement malfunction

<Trouble 7/7>

Screen Display
Description
Code Location
C0b7X Sorter (Puncher) Punch hole malfunction
C0d00 Front/Rear Guide Front/Rear Edge Guide operation malfunction
C0d20 Dup Storage Gate operation malfunction
C0d5X Dup Drive Motor Duplex Unit Drive Motor malfunction

Note: For details of malfunctions, see the TROUBLESHOOTING Manual.

<Clearing procedure>
• Using the ▼/▲ key, select the count to be cleared and press the Clear Key.
Note: If the count has been cleared accidentally, press the Interrupt Key to return the counter to the
count it had before clearing.

S-35
● Maintenance
Set the next maintenance time based on copy cycle count. The count is decreased by 1 per copy
cycle. When the count reaches the setting, the Maintenance Call message and inspection code
"M1" are displayed together.
Note: The Maintenance Call message is displayed or not displayed depending on the setting of
"Maintenance Call" in the Tech. Rep. Choice mode.
Note: If the Maintenance Call message is displayed, the copy cycle can be continued and copy is
not disabled.

Screen Display
Set Count
Counter 1 XXXXXX XXXXXX
Counter 2 XXXXXX XXXXXX
Counter 3 XXXXXX XXXXXX
Counter 4 XXXXXX XXXXXX
Counter 5 XXXXXX XXXXXX

<Setting procedure>
▲

1. Using the ▼/ key, select the counter to be set (1 to 5).

2. Enter the value from the 10-key pad (max. six digits).

▲
Note: To clear the counter, select the count to be cleared using the ▼/ key, and press the Clear
Key. If the count has been cleared accidentally, press the Interrupt Key to return the counter
to the count it had before clearing.

S-36
● Port/Option
Counts the frequency of use per port/option as reference data to be used by the Tech. Rep. in
maintenance.

<Port/Option 1/3> <Port/Option 2/3>

Screen Display Description Screen Display Description

Number of sheets fed Number of sheets fed
Manual Feed from the Manual Feed LCT from the Large Capacity
Section Cassette on C-301
Number of sheets fed Number of sheets that
1st Drawer ADF
from the 1st Drawer passed the ADF Entry
Number of sheets fed Number of sheets that
2nd Drawer
from the 2nd Drawer ADF Rev. passed the ADF
Turnover section
Number of sheets fed
3rd Drawer
from the 3rd Drawer Number of paper
Dup take-up cycles in the
Number of sheets fed
4th Drawer Duplex Unit
from the 4th Drawer
Number of sheets that
Number of sheets fed
5th Drawer Sorter passed through the
from the 5th Drawer
Sorter
Number of stapling
Stapler
cycles

<Port/Option 3/3>

Screen Display Description

Number of punching
Puncher
cycles
Value converted from
the number of PC Drum
PC Drum revolutions into the
number of A4 crosswise
sheets fed
Starter Number of sheets fed Note: When the PF-102 Paper Feed Cabinet is
fitted to the copier, the count is displayed
Value converted from as the 3rd Drawer.
the number of Fusing Note: The counts of the PC Drum, Fusing Roller
Fusing Roller Roller revolutions into and Charge Wire are displayed on a 1000
the number of A4 sheet basis.
crosswise sheets fed
Value converted from
the number of advance
Charge Wire
pulses into the number
of sheets copied

<Clearing procedure>
• Using the ▼/▲ key, select the count to be cleared and press the Clear Key.
Note: If the count has been cleared accidentally, press the Interrupt Key to return the counter to the
count it had before clearing.

S-37
● Consumables
Set the life of the consumables. When the count which increases one per copy cycle reaches the
set count, the Maintenance Call message and a code are displayed.
Note: Code display
Toner Collect: Code "M2", Copy Kit: Code "M4"
Note: The setting of Toner Collect should be 180K/80K for the copier with/without the Paper Feed
Cabinet, and must not be greater than the above. Copy is disabled and the Tech. Rep. Call
message displayed 5000 copy cycles after the count has reached the setting.
Note: "Copy Kit" depends on the setting of "Copy Kit Counter" in the Tech. Rep. Choice mode.

Screen Display
Set Count
Toner Collect XXXXXX XXXXXX
Copy Kit XXXXXX XXXXXX

<Setting procedure>
▲

1. Using the ▼/ key, select the counter to be set (1 to 5).

2. Enter the value from the 10-key pad (max. six digits).
Note: To clear the counter, select the count to be cleared using the ▼/

▲
key, and press the Clear
Key. If the count has been cleared accidentally, press the Interrupt Key to return the counter
to the count it had before clearing.
<Clearing procedure>
• Using the ▼/▲ key, select the count to be cleared and press the Clear Key.
Note: If the count has been cleared accidentally, press the Interrupt Key to return the counter to the
count it had before clearing.

S-38
 - Maintenance Code Display Resetting Procedures -
• Code: M1
Displayed to indicate that the count of any Maintenance Counter has reached the set count.
<Resetting procedure>
1. Select "Count" in the Tech. Rep. mode and access the"Maintenance" screen.
2. Select the count that has reached the set count and press the Clear Key to clear the count.
• Code: M2
Displayed to indicate that the Toner Collect count of the Consumables Counter has reached the
set count.
<Resetting procedure>
1. Select "Count" in the Tech. Rep. mode and access the "Consumables" screen.
2. Select the count of Toner Collect and press the Clear Key to clear the count.
• Code: M4
Displayed to indicate that the Copy Kit count of the Consumables Counter has reached the set
count.
<Resetting procedure>
1. Select "Count" in the Tech. Rep. mode and access the "Consumables" screen.
2. Select the count of Copy Kit and press the Clear Key to clear the count.
● Auto CPU Reset
On detection of an incorrect operation due to noise, etc., the CPU deenergizes and energizes the
Main Relay to prevent the occurrence of a malfunction. "1" or "0" is displayed to indicate whether
an incorrect operation has occurred or not based on the locations of occurrences.

Screen Display Description

MSC/Panel PWB-B (MSC Board)
Master PWB-A (Master Board)
SCP PWB-J (SCP Board)
ADF AFR-9
Sorter S-205/ST-101/ST-206
Data Controller D-102

Note: "1" indicates the occurrence of a malfunction and "0" no malfunction.

S-39
5. I/O Check
• This mode is used to check the Sensors and Boards at the occurrence of a jam or malfunction to
determine the location of the fault.

I/O Check Menu

IC Port Data Check

Paper Path Sensors Check

Memory Check

Controller Board Check

Panel Indication Check

1134S041CA

5-1. I/O Check setting procedure

<Setting procedure>
1. Select "I/O Check".
2. Select the mode to be checked.
3. Check the mode and change data according to the screen selected.

5-2. Settings in the I/O Check mode

● IC Port Data Check
Shows the states of I/O ports in a machine stop state.
<Input ports>
= Input Port Data display: "L/H" =
Cause the sensor to be "not blocked" or "blocked" to display "H" or "L" as input port data according
to the sensor state. This allows the sensor to be checked.
<Output ports>
= Output Port Data display: "0/1" =
Change the data of an output port from "0 to 1" or "1 to 0" with the "Change" key to make an
operation check on the electrical part corresponding to that port. This allows the electrical part to be
checked.
Note: Only the ports whose data may be changed are highlighted. 5 seconds after the data is
changed, the port highlighted returns to the previous state. Two or more pieces of data cannot
be changed together.

S-40
 <IC Port Data 1/8>

Data
IC No. Port
7 6 5 4 / 3 2 1 0
PWB-A P47-0 1 H 1 1 L ∗ ∗ ∗
(IC1A) P57-0 H 1 0 1 0 1 1 1
P67-0 0 0 0 1 H H L 1
P87-0 1 ∗ L ∗ 1 ∗ H ∗
PWB-A APA7-0 1 1 1 1 1 1 1 1
(IC4A) APB7-0 ∗ ∗ H L H H H L
APC7-0 ∗ 1 0 1 L H ∗ H
BPA7-0 1 1 1 1 1 1 ∗ ∗

Note: "∗" indicates either an unused or non-existing port.

<IC Port Data 2/8>

Data
IC No. Port
7 6 5 4 / 3 2 1 0
PWB-A BPB7-0 L H H H H H L H
(IC4A) BPC7-0 H L L L H H H H
O3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PWB-A APA7-0 ∗ ∗ L L L L ∗ ∗
(IC5A) APB7-0 H H H L H L H L
APC7-0 H H H L 1 1 1 1
BPA7-0 1 1 0 0 1 0 1 ∗
BPB7-0 L L H ∗ ∗ ∗ ∗ ∗

<IC Port Data 3/8>

Data
IC No. Port
7 6 5 4 / 3 2 1 0
PWB-A BPC7-0 1 1 1 1 ∗ ∗ ∗ ∗
(IC5A) O3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PWB-F (4) PB3-0/PA3-0 1 1 1
1 1 1 1 1
(IC1F) PD3-0/PC3-0 ∗ ∗ H H L L H H
PF3-0/PE3-0 H H 1 1 H H 0 0
PH3-0/PG3-0 ∗ ∗ 0 0 L H H L
PWB-A (200) PB3-0/PA3-0 1 ∗ 1 1 1 1 1 1
(IC1A) PD3-0/PC3-0 ∗ ∗ H L H H L L

Note: 200 indicates the PF-202.

S-41
 <IC Port Data 4/8>

Data
IC No. Port
3 2 1 0 / 3 2 1 0
PWB-A (200) PF3-0/PE3-0 L L 0 0 H L 0 0
(IC1A) PH3-0/PG3-0 ∗ ∗ 0 0 L L 0 0
PWB-A (200) PB3-0/PA3-0 H L L H L L ∗ ∗
(IC2A) PD3-0/PC3-0 ∗ ∗ ∗ ∗ L ∗ ∗ ∗
PF3-0/PE3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PH3-0/PG3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PWB-A (100) PB3-0/PA3-0 1 ∗ ∗ ∗ ∗ ∗ ∗ ∗
(IC1A) PD3-0/PC3-0 ∗ ∗ ∗ ∗ H ∗ ∗ ∗

<IC Port Data 5/8>

Data
IC No. Port
3 2 1 0 / 3 2 1 0
PWB-A (100) PF3-0/PE3-0 ∗ ∗ ∗ ∗ ∗ L ∗ ∗
(IC1A) PH3-0/PG3-0 ∗ ∗ 0 0 ∗ ∗ 0 0
PWB-A (100) PB3-0/PA3-0 ∗ L H H L H ∗ ∗
(IC2A) PD3-0/PC3-0 ∗ ∗ ∗ ∗ L ∗ ∗ ∗
PF3-0/PE3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PH3-0/PG3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PWB-A (400) PB3-0/PA3-0 1 ∗ 1 ∗ 1 1 1 1
(IC2A) PD3-0/PC3-0 ∗ ∗ H L H H ∗ L

Note: 400 indicates the PF-102.

<IC Port Data 6/8>

Data
IC No. Port
3 2 1 0 / 3 2 1 0
PWB-A (400) PF3-0/PE3-0 H H 0 0 H L ∗ ∗
(IC1A) PH3-0/PG3-0 ∗ ∗ 0 0 L L 0 0
PWB-A (400) PB3-0/PA3-0 ∗ L L H H L 1 1
(IC2A) PD3-0/PC3-0 ∗ ∗ H ∗ L H H L
PF3-0/PE3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PH3-0/PG3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PWB-G (Dup) PB3-0/PA3-0 1 1 ∗ ∗ 1 ∗ 1 1
(IC1G) PD3-0/PC3-0 ∗ ∗ ∗ ∗ L H H H

Note: Dup indicates the AD-5.

S-42
 <IC Port Data 7/8>

Data
IC No. Port
3 2 1 0 / 3 2 1 0
PWB-G (Dup) PF3-0/PE3-0 0 0 0 0 ∗ ∗ H L
(IC1G) PH3-0/PG3-0 ∗ ∗ 1 1 0 0 0 0
PWB-A (C) PB3-0/PA3-0 1 ∗ ∗ ∗ ∗ ∗ ∗ ∗
(IC1A) PD3-0/PC3-0 ∗ ∗ ∗ ∗ ∗ L ∗ H
PF3-0/PE3-0 ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
PH3-0/PG3-0 ∗ ∗ 0 ∗ ∗ ∗ 0 0
PWB-A (LCC) PB3-0/PA3-0 ∗ ∗ ∗ ∗ ∗ 0 0 1
(IC1A) PD3-0/PC3-0 ∗ ∗ ∗ ∗ ∗ L H L
Note: C indicates the 100-Sheet Feed Drawer.
LCC indicates the C-301.

<IC Port Data 8/8>

Data
IC No. Port
3 2 1 0 / 3 2 1 0
PWB-A (LCC) PF3-0/PE3-0 ∗ ∗ ∗ ∗ ∗ ∗ 0 0
(IC1A) PH3-0/PG3-0 ∗ ∗ 1 1 H L H L

S-43
● Paper Path Sensors Check
The passage of paper causes the states of the Paper Path Sensors to be switched from "1 to 0"
or "0 to 1" in order of paper passage. This allows checking whether the Sensors are "normal" or
"faulty".

Screen Display Sensor Name

1 1st Feed 1st Drawer Paper Take-Up Sensor (PC56)
2 2nd Feed 2nd Drawer Paper Take-Up Sensor (PC57)
3 3rd Feed 3rd Drawer Paper Take-Up Sensor (PC21)
4 4th Feed 4th Drawer Paper Take-Up Sensor (PC29)
5 1st Vertical 1st Drawer Vertical Transport Sensor (PC63)
6 2nd Vertical 2nd Drawer Vertical Transport Sensor (PC64)
7 3rd Vertical Vertical Transport Sensor 3 (PC17)
8 4th Vertical Vertical Transport Sensor 4 (PC22)
9 Trans. Roller Transport Roller Sensor (PC54)
10 Leading Edge Paper Leading Edge Detecting Sensor (PC55)
11 Exit Section Paper Exit Switch (S53)
12 Turnover Duplex Unit Turnover Path Sensor (PC13)
13 Dup Entrance Duplex Unit Paper Entry Sensor (PC14)
14 Dup Exit Duplex Unit Paper Take-Up Sensor (PC16)

Note: "0": Paper present, "1": Paper absent

<Setting procedure>
• Select the paper path (Drawer/Duplex Unit) to be checked, enter this mode, and press the Start
Key.
Note: When "Auto Paper" has been selected, paper is not passed (the check is not made).

S-44
● Memory Check
Used to check whether the ROM/RAM on the PWB-B Board (MSC Board) is accessed properly or
not.

Check Result Screen Display Action

"Memory check completed. Turn the The Power Switch must be turned OFF
Normal
Power Switch OFF, and then ON. and ON.
"ROM ERROR" Change PWB-B (IC2B).
"Message ROM ERROR" Change PWB-B (IC4B).
Faulty
"RAM ERROR" Change the PWB-B Board.
"VRAM ERROR" Change the PWB-B Board.
"LCDTC ERROR" Change the PWB-B Board.

<Setting procedure>
• Selecting this mode automatically puts the copier in the Memory Check mode.
Note: For the screen displayed after completion of the check, see the above table.
● Controller Board Check
Used to make a self-diagnostic check on the PWB-A (Master Board).

Check Result Screen Display Action

"Board Check mode highlighted None
Normal
returns to the previous state."
Faulty "Malfunction code C03XX is displayed." Change the PWB-A Board.

<Setting procedure>
• Selecting this mode automatically puts the copier in the Controller Board Check mode.
Note: For the screen displayed after completion of the check, see the above table.
● Panel Indication Check
Used to check the Control Panel LEDs and screen (liquid crystal).
<Setting procedure>
1. When this mode is selected, the LEDs which are all ON are turned OFF in the following
sequence. When all the LEDs are turned OFF, they are turned ON again in the same sequence.

All ON Mode Check Key Energy Saver Key Interrupt Key Start Key (Orange)

2. Checkered patterns appear on the screen (liquid crystal).

3. Select individual patterns. If the pattern displayed on the screen is switched from white to black
or from black to white, it is judged that the corresponding liquid crystal is normal.

S-45
6. Last Trouble
• Displays the copy mode in which the most recent malfunction occurred.

Item Description
Copy paper APS, paper size
Zoom ratio AMS, zoom ratio
Image density AE, Manual Exposure
Copy cycle Copy cycle
1-sided → 2-sided, 2-sided → 2-sided, etc., Mixed Original
Original copy mode
Detection mode, Book mode
Sort mode Sort, Non-sort, Group, Staple, Punch
Cover mode Front cover, back cover, copied cover, not copied
Insertion mode Copied insert, non-copied
OHP Interleaving mode Copied interleave, non-copied
File Margin mode Margin function, margin position, margin width
Erase mode Erase function, erase position, erase width

S-46
7. ROM Version
• Displays the current ROM version loaded in the system.

ROM Version Menu

ROM Version

MSC/Panel
Master
SCP
ADF
Sorter
Data Controller
Message

1134S045CA

Screen Display Description

MSC/Panel PWB-B (IC2B)
Master PWB-A (IC2A)
SCP PWB-J (IC1J)
ADF PWB-A (IC3A)
S-205 PWB-A (IC3A)
Sorter ST-101 PWB-A (IC3A)
ST-206 PWB-A (IC3A)
Data Controller D-102 (IC2)
Message PWB-B (IC4B)

Note: The ST-101 may only be fitted to the EP3050.

S-47
8. RD Mode
• Select this mode when the copier is fitted with the DT-103.

RD Mode Menu

End of normal data trans.

ID Code
*******
DT Setting Initial
Transmission

Data Save Call Completion

Data Load Counter Clear

1134S052CA

<Setting procedure>
• With this screen displayed, enter the ID Code from the 10-key pad (seven digits).

8-1. Settings in the RD mode

● DT Setting
When the copier is fitted with the DT-103, make the necessary settings.

RD Mode Menu RD Mode BackUp Menu

DT Setting DT Setting
CT-ID Dial Mode Tone
DT-ID Auto Receive YES
TEL No. RAM Clear YES

Next Change

1134S053CA 1134S054CA

<Setting procedure>
1. Select CT-ID and enter the center ID from the 10-key pad (four digits).
2. Select DT-ID and enter the data terminal ID from the 10-key pad (six digits).
3. Select TEL No. and enter the telephone number of the Center from the 10-key pad.
Note: When the office extension and outside line use different systems, enter "p" (for a "pulse"
telephone line) or "t" (for a "tone" telephone line) with the Stop Key before entering the
telephone number.
Note: Enter a pause or wait code according to the time required for switching from the extension line
to the outside line, which depends on the type of office system used:
Switching time = less than 3 seconds → Use the Interrupt Key to enter the pause code "—".
Switching time = more than 3 seconds → Use the Energy Saver Key to enter the wait code
"w".

S-48
4. Press the "Next" key.
5. Select "Dial Mode" and set the Dial Mode with the "Change" key according to the type of the
telephone line used.

Pulse line P10/P20

Tone line Tone

6. Select "Auto Receive" and specify "Yes" or "No" using the"Change" key.

Yes There is a DT-103 dedicated line.

No There is no DT-103 dedicated line.

Note: When there is no DT-103 dedicated line, specify "No".

7. Select "RAM Clear" and select "No" using the "Change" key.

Yes To make setting again.

No Normal setting

Note: Select "Yes" to change CT-ID or DT-ID after completion of the set-up. If "Yes" is not selected,
the setting cannot be changed.
● Data Save
Used to transmit the User’s Choice/Tech. Rep. Choice settings to the Center.
● Data Load
Used to return the Choice settings transmitted to the Center by Data Save.
● Initial Transmission
Used when the DT-103 has been set up to give a transmission command from the Data Terminal
to the Center to check the communication status.
Any of the following messages is displayed according to the communication status:

Message Displayed
End of normal data trans. Connection failed.
Line is busy. DT modem error.
Not answering. Connected.
Max. trial number reached.

● Call Completion
Notifies the Center that the maintenance of the machine is complete.

S-49
● Counter Clear
Used to clear the Spare Counter to be cleared.

RD Mode Menu

SpareCounter Clear

1 2 3 4 5

6 7 8 9 10

11 12 13 14 15

16 17 18 19 20

1134S055CA

<Setting procedure>
• Selecting the Counter to be cleared clears the selected Counter.

S-50
9. ADF Check/Setting
• This mode is used to check the operation of the Automatic/Duplexing Document Feeder and to
adjust the document stop position in each mode.

ADF Check/Setting Menu

Paper Passage & Input Check

Output Check

Doc. Stop Position Set

1134S050CA

9-1. ADF Check/Setting setting procedure

<Setting procedure>
1. Select "ADF Check/Setting".
2. Select the mode to be checked/set.
3. Make the check or adjustment in the corresponding mode according to the screen selected.

S-51
9-2. Settings in the ADF Check/Setting mode
● Paper Passage & Input Check
The results of the Paper Passage Check and Sensor Check of the document path in each mode
are indicated by "1/0".

Sensor
Empty Sensor (PC2)
Register Sensor (PC1)
Exit Sensor (PC8)
Width Sensor A (PC9)
Width Sensor B (PC10)
Width Sensor C (PC11)
Pick-Up Sensor A (PC3)
Pick-Up Sensor B (PC4)

Note: "1" indicates that paper is present and "0" that paper is absent except for the Pick-Up Sensors
A, B where "1" indicates that the Sensor is unblocked and "0" that it is blocked.
<Setting procedure>
1. On the Paper Passage Check screen, select the mode to be checked.
2. Press the "Next" key to access the Input Check screen, load paper onto the Automatic/Duplexing
Document Feeder, and press the Start Key.
3. According to the mode selected, make sure that "1/0" changes in order of the paper passage.
● Output Check
Used to check the operations of the Motors and Solenoids as single parts.

Screen Display Part Name Screen Display Part Name

M1 Pick-Up Motor M4 Turnover/Exit Motor
M2 Paper Take-Up Motor SL1 Scale Solenoid
M3 Main Drive Motor SL2 Turnover Solenoid

<Setting procedure>
• Select the part to be checked for operation and press the Start Key.

S-52
● Doc. Stop Position Set
Used to adjust the document stop position in each mode.
- 1-Sided -
Used to adjust the stop position of 1-sided documents when the Automatic/Duplexing Document
Feeder is used on the copier.

Setting Description Initial Setting Setting Description Initial Setting

43 Approx. −7 mm 51 Approx. +1 mm
44 Approx. −6 mm 52 Approx. +2 mm
45 Approx. −5 mm 53 Approx. +3 mm
46 Approx. −4 mm 54 Approx. +4 mm
47 Approx. −3 mm 55 Approx. +5 mm
48 Approx. −2 mm 56 Approx. +6 mm
49 Approx. −1 mm 57 Approx. +7 mm
50 Approx. 0 mm ∗ 58 Approx. +8 mm

Note: "43 to 49": Direction in which the document stop position overlaps the Original Scale
"51 to 58": Direction in which the document stop position moves away from the Original Scale
- 2-Sided -
Used to adjust the stop position of 2-sided documents when the Automatic/Duplexing Document
Feeder is used on the copier.

Setting Description Initial Setting Setting Description Initial Setting

43 Approx. −7 mm 51 Approx. +1 mm
44 Approx. −6 mm 52 Approx. +2 mm
45 Approx. −5 mm 53 Approx. +3 mm
46 Approx. −4 mm 54 Approx. +4 mm
47 Approx. −3 mm 55 Approx. +5 mm
48 Approx. −2 mm 56 Approx. +6 mm
49 Approx. −1 mm 57 Approx. +7 mm
50 Approx. 0 mm ∗ 58 Approx. +8 mm

Note: "43 to 49": Direction in which the document stop position overlaps the Original Scale
"51 to 58": Direction in which the document stop position moves away from the Original Scale

S-53
- 2in1-
Used to adjust the stop position of 2-in-1 documents when the Automatic/Duplexing Document
Feeder is used on the copier.

Setting Description Initial Setting Setting Description Initial Setting

43 Approx. −7 mm 51 Approx. +1 mm
44 Approx. −6 mm 52 Approx. +2 mm
45 Approx. −5 mm 53 Approx. +3 mm
46 Approx. −4 mm 54 Approx. +4 mm
47 Approx. −3 mm 55 Approx. +5 mm
48 Approx. −2 mm 56 Approx. +6 mm
49 Approx. −1 mm 57 Approx. +7 mm
50 Approx. 0 mm ∗ 58 Approx. +8 mm

Note: "43 to 49": Direction in which the document stop position overlaps the Original Scale
"51 to 58": Direction in which the document stop position moves away from the Original Scale
- 2in1 Doc. Spacing -
Used to adjust the spacing of 2-in-1 documents when the Automatic/Duplexing Document Feeder is
used on the copier.

Setting Description Initial Setting Setting Description Initial Setting

43 Approx. −7 mm 51 Approx. +1 mm
44 Approx. −6 mm 52 Approx. +2 mm
45 Approx. −5 mm 53 Approx. +3 mm
46 Approx. −4 mm 54 Approx. +4 mm
47 Approx. −3 mm 55 Approx. +5 mm
48 Approx. −2 mm 56 Approx. +6 mm
49 Approx. −1 mm 57 Approx. +7 mm
50 Approx. 0 mm ∗ 58 Approx. +8 mm

Note: "43 to 49": Direction in which the document spacing decreases

"51 to 58": Direction in which the document spacing increases
<Setting procedure>
1. Using the ▼/▲ key, select the mode to be adjusted.
▲
▼

2. Using the / key, select the desired setting.

S-54
10. Level History
• This mode is used to display and set various level operating values to the operating status of the
machine.

<Level History 1/2>

Screen Display Variable Range Increments Description

Set 2 to 254 2 Reference value of ATDC control
ATDC Level
Correction 1.0 to 9.0 (%) 0.5% Current ATDC level
Initial 550 to 850 (V) 30V Initial setting of grid voltage
Vg Level Correction value of grid voltage due
Current 550 to 850 (V) 30V
to changes with time

<Level History 2/2>

Screen Display Variable Range Increments Description

Set 190 to 210 (°C) 10°C Target value of fuser temperature
Fuser Temp.
Current 160 to 230 (°C) 10°C Current fuser temperature
Initial setting of Exposure Lamp
Initial 49 to 71 (V) 1V
level
Expo. Level
Correction value of Exposure Lamp
Current 49 to 71 (V) 1V
voltage due to changes with time
0 to 1270 Cumulative time of toner
Toner Replenishing Time 10 minutes
(minutes) replenishment

NOTE
Values may be entered into only "ATDC Level - Set" and "Fuser Temp. - Set". The other level
histories are only displayed for your reference.

= ATDC level reference value =

When the PWB-R (RAM Board) is changed or the P/C Unit from another machine is used, enter
the ATDC level reference value (given on the Label found inside the Front Door).

= Fuser temperature setting =

When a fusing malfunction occurs frequently due to the environment or paper used, adjust the
fuser temperature setting to prevent the fuser malfunction.

<Setting procedure>
1. Select the mode to be set.
▲
▼

2. Using the / key, select the desired setting.

S-55
11. Machine Status
• This mode is used to display up to five codes of isolated malfunctions that have occurred. The
following malfunctions are detected as isolated malfunctions.

Malfunction Code Description

C01 00 Charge Wire advance malfunction
C03 50 to 54 Control Board, Harness malfunction
70/74
C09 XX Paper feed malfunction
C0F 02 Original size detection malfunction
C0F 20 to 23 AIDC Sensor malfunction
C0F 30/31 ATDC Sensor malfunction
C0F 7X Paper Empty Sensor malfunction
C0F E1 to FF Original Size Detecting Sensor malfunction
C0b 10 to 13, 30, 51, 60 to 64, 70, 71 Sorter malfunction
C0d XX Duplex Unit malfunction

Note 1: Up to five isolated malfunction codes are displayed. When the sixth isolated malfunction is
detected or when an isolated malfunction is detected at any paper source other than the
Manual Feed Section, the corresponding ordinary malfunction code is displayed and copy is
disabled.
Note 2: The isolated malfunctions corresponding to codes C0bXX (Sorter Trouble) are displayed in
the form of the following pictorial symbols, not in the form of malfunction codes. The
malfunctions corresponding to codes C0b10 to 13, 51 and 70 are treated as isolated
malfunctions when detected during initial operation and as ordinary malfunctions when
detected during a copy cycle.
C0b10 to 13/30/60 to 64 : 1134M071AA

C0b51 : 1134M072AA

C0b70, 71 :
1134M073AA
<Clearing procedure>
• With the Machine Status screen being displayed, swing open/close the Front Door to clear all the
isolated malfunction codes being displayed.
Note: For C0F02/C0FE1 to FF and C0bXX, turn the Power Switch OFF and ON to clear the isolated
malfunction codes.

S-56
12. Administrator Mode
• This mode is used to set the administrator number in addition to the functions on "Menu Screen
6/6" in the User’s Choice mode.

Administrator Mode Menu

Select a function by pressing the

key.
Copy Track: OFF

User Help:

Max. Copy Sets: OFF

Administrator # Input:

1134S044CA

● Copy Track
● User Help ∗: For these functions, see "Menu Screen 6/6" in the User’s Choice Mode.
● Max. Copy Sets

● Administrator # Input
Used to set the administrator number required to make any of the above settings on "Menu
Screen 6/6" in the User’s Choice Mode. (Identification number setting for opening the screen)
<Setting procedure>
• Enter the number from the 10-key pad (max. four digits).

S-57
 5 ADJUST MODE
• This mode is used to adjust the optical components before shipment from the factory and must not
be executed except when the PWB-R (RAM Board) has been changed. When the PWB-R has
been changed, enter the factory settings indicated on the Label inside the Front Door.

5-1. Adjust Mode Screens

Adjust Enter Adjust BackUp Enter

Adjust 1/2 Adjust 2/2

A0 Lens Focus 50 A6 Book B-Scan Regist 50

A1 Lens Full Size Position 50
A2 Mirror Full Size Position 50 A11 Lens Position Enlargement 50
A3 Feed Direction Mag. Ratio 50 A12 Leading Edge Erase Adjust 50
A4 Lens Position Full Size 50 A13 Trailing Edge Erase Adjust 50
A5 Lens Position Reduction 50

49-51 45-55

Next

1134S042CA 1134S043CA

5-2. Adjust Mode Setting Procedure

<Setting Procedure>
1. Place the copier in the Tech. Rep. mode by pressing the following Keys.

Stop Key → "0" → Stop Key "1"

2. Then, place the copier in the Adjust Mode with the following Keys.

Stop Key → Start Key

3. Make various settings according to the screen selected.

4. Using the ▼/▲ key, select the function of the Adjust Mode to be set.
Note: Press the "Next" or "Back Up" key to switch the screen from one to the other.
▼
▲

5. Using the / key, select the setting.

6. Press "Enter" to enter the setting.
Note: In regard to A0 and A1 after pressing Enter Key, setting is completed by turning the Power
switch OFF and ON.
<Leving the Mode>
• Press the Panel Reset Key.

S-58
5-3. Settings in the Adjust Mode
● Lens Focal Length Adjustment (A-0)
Corrects the focal length of the Lens.

Setting Description Initial Setting

Short focal
49 length
adjustment
50 Standard ∗
Long focal
51 length
adjustment

● Lens Full Size Position Adjustment (A-1)

Adjusts the magnification ratio in the crosswise direction by finely adjusting the Lens home
position.

Setting Description Initial Setting Setting Description Initial Setting

43 ±0 steps 51 +16 steps
44 +2 steps 52 +18 steps
45 +4 steps 53 +20 steps
46 +6 steps 54 +22 steps
47 +8 steps 55 +24 steps
48 +10 steps 56 +26 steps
49 +12 steps 57 +28 steps
50 +14 steps ∗ 58 +30 steps

S-59
● Mirror Full Size Position Adjustment (A-2)
Corrects the optical length of the Mirror in response to the Lens Focal Length Adjustment.

Setting Description Initial Setting Setting Description Initial Setting

43 ±0 steps 51 +24 steps
44 +3 steps 52 +27 steps
45 +6 steps 53 +30 steps
46 +9 steps 54 +33 steps
47 +12 steps 55 +36 steps
48 +15 steps 56 +39 steps
49 +18 steps 57 +42 steps
50 +21 steps ∗ 58 +45 steps

● Feeding Direction Magnification Ratio Adjustment (A-3)

Adjusts the magnification ratio in the feeding direction by finely adjusting the scan speed.

Setting Description Initial Setting Setting Description Initial Setting

46 −16/1000 51 +4/1000
47 −12/1000 52 +8/1000
48 −8/1000 53 +12/1000
49 −4/1000 54 +16/1000
50 ±0 ∗

S-60
● Lens Position Full Size Registration (A-4)
Adjusts the leading edge for a full size copy by changing the engagement timing of the
Synchronizing Roller.

Setting Description Initial Setting Setting Description Initial Setting

40 −10 pulses 51 +1 pulse
41 −9 pulses 52 +2 pulses
42 −8 pulses 53 +3 pulses
43 −7 pulses 54 +4 pulses
44 −6 pulses 55 +5 pulses
45 −5 pulses 56 +6 pulses
46 −4 pulses 57 +7 pulses
47 −3 pulses 58 +8 pulses
48 −2 pulses 59 +9 pulses
49 −1 pulse 60 +10 pulses
50 ±0 ∗

Note: Increments: Approx. 0.4 mm/1 pulse

S-61
● Lens Position Reduction Registration (A-5)
Adjust the leading edge for a reduction copy by changing the engagement timing of the
Synchronizing Roller.

Setting Description Initial Setting Setting Description Initial Setting

40 −10 pulses 51 +1 pulse
41 −9 pulses 52 +2 pulses
42 −8 pulses 53 +3 pulses
43 −7 pulses 54 +4 pulses
44 −6 pulses 55 +5 pulses
45 −5 pulses 56 +6 pulses
46 −4 pulses 57 +7 pulses
47 −3 pulses 58 +8 pulses
48 −2 pulses 59 +9 pulses
49 −1 pulse 60 +10 pulses
50 ±0 ∗

Note: Increments: Approx. 0.2 mm/1 pulse

S-62
● Book B Scan Registration (A-6)
Adjust Book Scan B by changing the engagement timing of the Synchronizing Roller.

Setting Description Initial Setting Setting Description Initial Setting

45 −5 pulses 51 +1 pulse
46 −4 pulses 52 +2 pulses
47 −3 pulses 53 +3 pulses
48 −2 pulses 54 +4 pulses
49 −1 pulse 55 +5 pulses
50 ±0 pulses ∗

Note: Increments: Approx. 0.4 mm/1 pulse

● Lens Position Enlargement Registration (A-11)
Adjust the leading edge for a enlargement copy by changing the engagement timing of the
Synchronizing Roller.

Setting Description Initial Setting Setting Description Initial Setting

40 −10 pulses 51 +1 pulse
41 −9 pulses 52 +2 pulses
42 −8 pulses 53 +3 pulses
43 −7 pulses 54 +4 pulses
44 −6 pulses 55 +5 pulses
45 −5 pulses 56 +6 pulses
46 −4 pulses 57 +7 pulses
47 −3 pulses 58 +8 pulses
48 −2 pulses 59 +9 pulses
49 −1 pulse 60 +10 pulses
50 ±0 ∗

Note: Increments: Approx. 0.8 mm/1 pulse

S-63
● Leading Edge Erase Adjustment (A-12)
Corrects the width of erase on the leading edge of an image by changing the ON timing of the
Image Erase Lamp.

Setting Description Initial Setting Setting Description Initial Setting

45 −5 mm 51 +1 mm
46 −4 mm 52 +2 mm
47 −3 mm 53 +3 mm
48 −2 mm 54 +4 mm
49 −1 mm 55 +5 mm
50 ±0 mm ∗

● Trailing Edge Erase Adjustment (A-13)

Corrects the width of erase on the trailing edge of an image by changing the ON timing of the
Image Erase Lamp.

Setting Description Initial Setting Setting Description Initial Setting

42 −8 mm 51 +1 mm
43 −7 mm 52 +2 mm
44 −6 mm 53 +3 mm
45 −5 mm 54 +4 mm
46 −4 mm 55 +5 mm
47 −3 mm 56 +6 mm
48 −2 mm 57 +7 mm
49 −1 mm 58 +8 mm
50 ±0 mm ∗

S-64
6 LIST OF SETTINGS TO BE MADE DUE TO PARTS REPLACEMENT
Parts Changed Original Drum Original
RAM PC AIDC ATDC Size Exposure Charge Size
Starter
Board Drum Sensor Sensor Detecting Lamp Corona Detecting
Setting Item Sensor Wire Board

Copy Mode Program O — — — — — — — —

User’s Choice Mode O — — — — — — — —
Tech. Rep. Mode O — — — — — — — —
Adjust Mode O — — — — — — — —
F5 Mode O O — O — — O — —
F7 Mode O — — — — O — — O
FF Mode — — O — O — — — —
"PC Drum" in the
Port/Option Counter — O — — — — — — —
cleared
"Starter" in the
Port/Option Counter — — O — O — — — —
cleared
"Charge Wire" in
the Port/Option — — — — — — — O —
Counter cleared
Initialize O — — — — — — — —
Memory Clear O — — — — — — — —

O: Setting made —: No setting

S-65
 Copyright
1994 MINOLTA CO., LTD
Printed in Japan

Use of this manual should

be strictly supervised to
avoid disclosure of
confidential information.

MINOLTA CO., LTD. 1134-7987-11 94071850

Printed in Japan
EP3050/EP4050

TROUBLESHOOTING
 CONTENTS
1 1 INTRODUCTION
1-1. General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-1
1-2. How to Use This Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-1
1-3. Reading the Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-1

2 2 PAPER TRANSPORT FAILURE

1. Paper Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-6

2. Types of Misfeed Detection and Detection Timings . . . . . . . . . . . T-9

3. Misfeed Clearing Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-11

3-1. Copier Take-Up Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-11
3-2. Transport/Separator Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . T-16
3-3. Multi Bypass Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-20
3-4. Fusing/Exit Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-23
3-5. PF-202 Paper Feed Cabinet Take-Up Misfeed . . . . . . . . . . . T-25
3-6. PF-102 Paper Feed Cabinet Take-Up Misfeed . . . . . . . . . . . T-29
3-7. Duplex Unit Vertical Transport/Entry Misfeed . . . . . . . . . . . . T-32
3-8. Duplex Unit Take-Up Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . T-40

3 3 MALFUNCTIONS

1. Detection Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-45

2. Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-66

2-1. C0000: Main Drive Motor M1’s Failure to Turn
C0010: Main Drive Motor M1 Turning at Abnormal
C0010: Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-66
2-2. C0040: Suction Fan Motor M4’s Failure to Turn
C004A: Original Glass Cooling Fan Motor M5’s Failure to
C004A: Turn
C004b: Original Glass Cooling Fan Motor M5 Turning at
C004b: Abnormal Timing
C004c: Exhaust Fan Motor M3’s Failure to Turn
C004d: Exhaust Fan Motor M3 Turning at Abnormal
C004d: Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-68

i
 CONTENTS
2-3. C0070: Main Hopper Toner Replenishing Motor M8’s
C0070: Failure to Turn
C0071: Main Hopper Toner Replenishing Motor M8 Turning
C0071: at Abnormal Timing
C0072: Sub Hopper Toner Replenishing Motor M9’s Failure
C0072: to Turn. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-74
2-4. C0100: Charge Corona Wire Winding Failure . . . . . . . . . . . . T-76
2-5. C0200: PC Drum Charge, Image Transfer/Paper Separator
C0200: Coronas Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-77
2-6. C03XX: (Control Board, Harness malfunction) . . . . . . . . . . . T-78
2-7. C0400: Exposure Lamp LA1’s Failure to Turn ON
C0410: Exposure Lamp LA1 Turning ON at Abnormal
C0410: Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-79
2-8. C0500: Warming-Up Failure
C0510: Abnormally Low Fusing Temperature
C0520: Abnormally High Fusing Temperature
C0522: Fusing Front/Rear Thermistor TH1/2 Malfunction . . T-81
2-9. C0600: Scanner Motor M2 Malfunction
C0601: SCP Board PWB-J Malfunction
C0650: Scanner Reference Position Sensor PC81
C0650: Malfunction
C0660: Scanner Load Failure
C06F0 to C06F7: SHOME, BASE, TRON, SCEND Signal
C06F0 to C06F7: Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-84
2-10. C0610: Lens Motion Failure
C0620: 4th/5th Mirrors Motion Failure . . . . . . . . . . . . . . . . . T-86
2-11. C0910: 2nd Drawer Paper Lift-Up Failure
C0914: 2nd Drawer Paper Lift-Up Motor M14’s Failure
C0914: to Turn
C0920: 1st Drawer Paper Lift-Up Failure
C0924: 1st Drawer Paper Lift-Up Motor M13’s Failure
C0924: to Turn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-88
2-12. C0911: 2nd Drawer Paper Lower-Down Failure
(Inch Area) C0912: 2nd Drawer Paper Lower-Down Failure,
C0912: 2nd Drawer Lock Failure
C0913: 2nd Drawer Lock Failure
C0916: 2nd Drawer Lock Release Failure . . . . . . . . . . . . . . T-91

ii
 CONTENTS
2-13. C0921: 1st Drawer Paper Lower-Down Failure
(Inch Area) C0922: 1st Drawer Paper Lower-Down Failure,
C0922: 1st Drawer Lock Failure
C0923: 1st Drawer Lock Failure
C0926: 1st Drawer Lock Release Failure . . . . . . . . . . . . . . T-94
2-14. C0E00: Main Erase Lamp LA3’s Failure to Turn ON
C0E01: Main Erase Lamp LA3 Turning ON at Abnormal
C0E01: Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-97
2-15. C0E20: Image Erase Lamp LA2’s Failure to Turn ON . . . . T-99
2-16. C0F02: Original Size Detecting Board UN2 Malfunction
C0FE1 to C0FFF: Original Size Detecting Sensor
C0FE1 to C0FFF: Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . T-100
2-17. C0F10: AE Sensor Board PWB-H Malfunction . . . . . . . . . . T-102
2-18. C0F20: AIDC Sensor UN3 Variation Correction Failure
C0F21: AIDC Sensor UN3 Contamination Correction
C0F21: Failure
C0F22: AIDC Sensor UN3 Vg Correction Failure
C0F23: AIDC Sensor UN3 Exposure Correction Failure . . T-103
2-19. C0F30: ATDC Sensor UN4 Failure
C0F31: ATDC Sensor UN4 Failure. . . . . . . . . . . . . . . . . . . . T-104
2-20. C0900: 3rd Drawer Paper Lift-Up Failure
C0904: 3rd Drawer Paper Lift-Up Motor M24’s Failure to
C0904: Turn
C0950: 4th Drawer Paper Lift-Up Failure
C0954: 4th Drawer Paper Lift-Up Motor M25’s Failure to
C0954: Turn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-105
2-21. C0990: Main Tray Upward Motion Failure
C0991: Main Tray Downward Motion Failure
C0992: Main Tray Downward Motion Failure
C0993: Main Tray Upward Motion Failure
C0994: Main Tray Elevator Motor M26’s Failure to Turn . . T-109
2-22. C0998: Shifter Transfer Failure
C0999: Shifter Return Failure
C099A: Shifter Return Failure
C099b: Shifter Transfer Failure
C099c: Shift Motor M27’s Failure to Turn . . . . . . . . . . . . . . T-112
2-23. C0996: 3rd Drawer Lock Release Failure
C0F79: Paper Empty Sensor Failure . . . . . . . . . . . . . . . . . . T-115

iii
 CONTENTS
2-24. C0d00: Duplex Unit Front/Rear Edge Guide Plates
C0d00: Home Position Detection Failure
C0d20: Duplex Unit Trailing Gate Unit Home Position
C0d20: Detection Failure
C0d50: Duplex Unit Drive Motor M31’s Failure to Turn
C0d51: Duplex Unit Drive Motor M31 Turning at Abnormal
C0d51: Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-119

3. Power is not Turned ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-122

iv
 1 INTRODUCTION
1-1. General Precautions
1. When servicing the copier with its covers removed, use utmost care to prevent your hands,
clothing, and tools from being caught in revolving parts including the chains and gears. When
servicing the copier with the Lower Rear Cover removed, be sure to install the jig.
2. Before attempting to replace parts and unplug connectors, make sure that the power cord of
the copier has been unplugged from the wall outlet.
3. Never create a closed circuit across connector pins except those specified in the text and on the
printed circuit.
4. When creating a closed circuit and measuring a voltage across connector pins specified in the
text, be sure to use the green wire (GND).
5. When the user is using a word processor or personal computer from the wall outlet of the same
line, take necessary steps to prevent the circuit breaker from opening due to overloads.
6. Keep all disassembled parts in good order and keep tools under control so that none will be lost
or damaged.

1-2. How to Use This Book

1. If a component on a PWB or any other functional unit including a motor is defective, the text only
instructs you to replace the whole PWB or functional unit and does not give troubleshooting
procedure applicable within the defective unit.
2. All troubleshooting procedures contained herein assume that there are no breaks in the
harnesses and cords and all connectors are plugged into the right positions.
3. For the removal procedures of covers and parts, see DIS/REASSEMBLY, ADJUSTMENT.
4. The troubleshooting procedures are given in the order of greater frequency of trouble or order of
operation.
5. The procedures preclude possible malfunctions due to noise and other external causes.

1-3. Reading the Text

1. The paper transport failure troubleshooting procedures are given according to the symptom. First
identify the location where the paper is present and start the procedure for that particular location.
For malfunction troubleshooting, start with step 1 and onward.
2. Make checks in numerical order of the steps and, if an item is checked okay, go to the next step.

Pattern 1 Pattern 2

Step Check Item Result Action Step Check Item Result Action
1 Is --? YES Do this. Is --? YES Do this.
1
2 Go to step 2 if it checks okay. NO Check that.
Go to step 2 if it checks
2
okay.

T-1
3. Method for Checking the Control Parts with Loads

To check the Control parts easier and safer, this copier allows the Technical
Representative to determine whether a control part is fully operational and signals are
input and output properly by changing or checking the I/O port data of the board IC
with the copier in the standby state (including where a misfeed, malfunction or setting
fault condition exists).

Procedure
1) On the circuit diagram accompanying the text, locate the I/O port of the control part which is
probably faulty when a misfeed or malfunction occurs.
2) Select the function "I/O Port Data" of "I/O Check" in the Tech. Rep. mode and call up the screen
which contains the port identified in Step 1) above. (See the SWITCHES ON PWBs Section.)
3) Change or check the input or output port data to check that the control part is operational and
signals are input and output properly.
4) If the control part does not operate after the output port data has been changed, select "Board
Check" of "I/O Check" in the Tech. Rep. mode and determine whether the cause of the problem
is the board or any other functional unit.
NOTE: Only the output ports given on page T-48, 49 may be checked by "Board Check" of "I/O
Check" in the Tech. Rep. mode.

T-2
<Checking a Control Part with a load by changing the Input Port Data>
Example

The 1st Drawer Paper Take-Up Sensor PC56 is probably faulty when a misfeed occurs at
the Paper Take-Up Section of the copier.

• Procedure (Start after removing the misfed paper)

1) From the circuit diagram accompanying the text, the port for the signal indicating PC56 is
blocked/not blocked is identified as the PC1 input port on PWB-F (IC1F).

1134C04TAA

2) Select "IC Port Data" of "I/O Check" in the Tech. Rep. mode (see the SWITCHES ON
PWBs/TEST MODE Section), and call up the screen which contains the PC1 input port on
PWB-F (IC1F).

3) Make sure that the on-the-screen data of PC1 input port on PWB-F (IC1F) is "H" (PC56: not
blocked).
(IC5A) 3-0
PWB-F PB3-0/PA3-0 111 1 1 1 1 1
(IC1F) PD3-0/PC3-0 H H L L H H
PF3-0/PE3-0 HH1 1 H H 0 0
PH3-0/PG3-0 0 0 L H H L
PWB-A(200) PB3-0/PA3-0 1 1 1 1 1 1 1
(IC1A) PD3-0/PC3-0 L L H H L L

Change Next

1134T120CA
4) Open the Upper Right Door and move the Actuator to block PC56.
5) Select "IC Port Data" of "I/O Check" in the Tech. Rep. mode again, call up the screen which
contains the PC1 input port on PWB-F (IC1F), and make sure that the data has changed from
"H" to "L". (IC5 ) 3-0
PWB-F PB3-0/PA3-0 111 1 1 1 1 1
(IC1F) PD3-0/PC3-0 H H L L L H
PF3-0/PE3-0 HH1 1 H H 0 0
PH3-0/PG3-0 0 0 L H H L
PWB-A(200) PB3-0/PA3-0 1 1 1 1 1 1 1
(IC1A) PD3-0/PC3-0 L L H H L L

Change Next

1134T121CA
L: PC56 normal H: PC56 faulty

T-3
<Checking a Control Part with a load by changing the Output Port Data>
Example

The Transport Roller Clutch (CL1) is probably faulty when a misfeed occurs at the Paper
Take-Up Section of the copier.

• Procedure
1) From the circuit diagram accompanying the text, the port for the CL1
energization/deenergization signal is identified as the BPA4 output port on PWB-A (IC4A).

1134C02TAA

2) Select "IC Port Data" of "I/O Check" in the Tech. Rep. mode (see the SWITCHES ON
PWBs/TEST MODE Section), and call up the screen which contains the BPA4 output port on
PWB-A (IC4A).
IC Port Data 1/8 BackUp Menu

IC Port 7 6 5 4/3 2 1 0
PWB-A P47-0 1 H 1 1 L
(IC1A) P57-0 H 1 0 1 0 1 1 1
P67-0 0 0 0 1 H H L 1
P87-0 1 L 1 H
PWB-A APA7-0 1 1 1 1 1 1 1 1
(IC4A) APB7-0 H L H H H L
APC7-0 1 0 1 L H H
BPA7-0 1 1 1 1 1 1

Change Next

1134T122CC

3) Highlight the on-the-screen data of BPA4 output port on PWB-A (IC4A) and make sure that
the data is "1" (CL1: deenergized).
P87-0 1 L 1 H
PWB-A APA7-0 1111 1 111
(IC4A) APB7-0 HL H HHL
APC7-0 101 L H H
BPA7-0 1111 1 1

Change Next

1134T123CB
4) Touch the "Change" key on the screen to change the data from 1 to 0. At this time, CL1 is
energized for approx. 5 seconds.
P67-0 0001HHL1
Normal: CL1 makes a sound. Faulty: CL1 does not sound.
P87-0 1 L 1 H
PWB-A APA7-0 11111111
(IC4A) APB7-0 HLHHHL
APC7-0 101LH H
BPA7-0 111011

Change Next

1134T124CB
∗ As soon as the data is changed, the leftmost port whose data may be changed is highlighted.

T-4
5) If CL1 did not operate, make a "Board Check" via "I/O Check" in the Tech. Rep. mode.
I/O Check Menu

IC Port Data Check

Paper Path Sensors Check

Memory Check

Controller Board Check

Panel Indication Check

1134T224CB

6) The following screen is displayed if PWB-A does not output the CL1 energization signal.

A malfunction was detected.

Call your Technical Rep.
and provide the code:

Code:C 0 3 2 4
TEL :

1134T227CB

∗ For the output signal-basis malfunction codes (C03**), see page T-48, 49.

T-5
 2 PAPER TRANSPORT FAILURE
1. Paper Misfeed
When a paper misfeed occurs in the copier, the misfeed message, misfeed location and misfed
paper location are displayed on the Touch Panel.

Blinking Jam location

Lit Paper location
<Inch Area> <Metric Area>

Misfeed detected. Misfeed detected.

Remove misfeed at . Remove misfeed at .

16 14 16 14
15 15

3 2 1 4 3 2 1 4
17 17
6 8 6 8
9 9
18 18
13 12 13 12
7 5 7 5
10 10
11

1134T240EA 1134T241DA

∗: When an option is installed

Blinking/Lit Jam/Paper Location Ref. Page
1 Multi bypass take-up and transport T-20 to 22
2 Transport/Separator T-16 to 19
3 Fusing/Exit T-23, 24
4 Copier take-up/vertical transport T-11 to 15
4 , 5 Paper Feed Cabinet take-up/vertical transport T-25 to 31 ∗
6 , 7 Duplex Unit vertical transport T-32 to 39 ∗
8 1st Drawer take-up T-11 to 13, T-15
9 2nd Drawer take-up T-11, 12, 14, 15
10 3rd Drawer take-up T-25 to 27, T-29 to 31 ∗
11 4th Drawer take-up (Metric Area) T-25 to 28 ∗
12 Duplex Unit take-up T-40 to 44 ∗
7 , 13 Duplex Unit storage T-32, 38, 39 ∗
14 Automatic/Duplexing Document Feeder take-up  ∗
15 Automatic/Duplexing Document Feeder transport  ∗
16 Automatic/Duplexing Document Feeder turnover/exit  ∗
17 Sorter  ∗
18 LCT  ∗
<Display resetting method>
Jam in the copier Open/close the Front Door.
Jam in the option (except the Duplex Unit) Open/close or re-connect the option.

T-6
Misfeed Detecting Sensors Layout

Inch Area ∗ : When an option is installed

Paper Leading
Edge Detecting
Sensor PC55
Paper Exit
Switch S53
Transport Roller
Sensor PC54

∗ Duplex Unit 1st Drawer Vertical

Vertical Transport Sensor PC63
Transport
Sensor 1 PC30
1st Drawer Paper
Take-Up Sensor PC56

∗ Duplex Vertical
2nd Drawer Vertical
Transport
Transport Sensor PC64
Sensor 2 PC12

2nd Drawer Paper

∗ Duplex Unit Take-Up Sensor PC57
Paper Entry
Sensor PC14
∗ Vertical Transport
Sensor 3 PC17

∗ Vertical Transport
Sensor 4 PC22

∗ Duplex Unit ∗ Duplex Unit

Turnover Path
∗ Duplex Unit Paper Paper Take-Up
Sensor PC13
Empty Sensor PC15 ∗ 3rd Drawer Sensor PC16
Paper Take-Up
Sensor PC21

T-7
 Metric Area ∗ When an option is installed

Paper Leading
Edge Detecting
Sensor PC55
Transport Roller
Sensor PC54
Paper Exit
Switch S53 1st Drawer
Vertical Transport
Sensor PC63

∗ Duplex Unit 1st Drawer

Vertical Paper Take-Up
Transport Sensor PC56
Sensor 1 PC30
2nd Drawer
Vertical
Transport
∗ Duplex Vertical Sensor PC64
Transport
Sensor 2 2nd Drawer
PC12 Paper Take-Up
∗ Duplex Unit Sensor PC57
Paper Entry
Sensor PC14
∗ Vertical
Transport
Sensor 3
PC17
∗ Duplex Unit
Turnover Path
Sensor PC13 ∗ Vertical
Transport
Detection
∗ Duplex Unit Paper Sensor 4
Empty Sensor PC15 PC22

∗ Duplex Unit
Paper
Take-Up
Sensor PC16
∗ 4th Drawer ∗ 3rd Drawer
Paper Paper Take-Up
Take-Up Sensor PC21
Sensor PC29

T-8
2. Types of Misfeed Detection and Detection Timings
• The following table lists misfeed detection types and corresponding detection timings classified
by misfeed locations.
<Paper Take-Up Misfeed>

Type Detection Timing

The 1st Drawer Paper Take-Up
ON
Sensor PC56 is not blocked (L)
M11 OFF
approx. 2.93 sec. after the 1st 2.93sec
Drawer Paper Take-Up Motor H
M11 is energized. PC56 L
Paper take-up 1134T01TAA
failure detection The 2nd Drawer Paper Take-Up
ON
Sensor PC57 is not blocked (L)
M12 OFF 2.93sec
approx. 2.93 sec. after the 2nd
Drawer Paper Take-Up Motor H
M12 is energized. PC57 L
1134T02TAA

The 1st Drawer Paper Take-Up H

Sensor PC56 is not unblocked PC56 L
T
(H) "T" seconds (which depends H
on the paper size) after the 1st PC63 L
Drawer Vertical Transport Sensor A4 crosswise : T=approx. 1 sec.
Paper take-up
PC63 is blocked (L). 1134T36TCB
trailing edge
detection The 2nd Drawer Paper Take-Up H
Sensor PC57 is not unblocked PC57 L
T
(H) "T" seconds (which depends H
on the paper size) after the 2nd PC64 L
Drawer Vertical Transport Sensor A4 crosswise : T=approx. 1 sec.
PC64 is blocked (L). 1134T37TCB

The Transport Roller Sensor

H
PC54 is not blocked (L) approx. L
PC63 0.73sec
0.73 sec. after the 1st Drawer
Vertical Transport Sensor PC63 H
Leading edge PC54 L
is blocked (L).
detection by
1134T05TAA
Transport
Roller Sensor The Transport Roller Sensor
H
PC54 PC54 is not blocked (L) approx.
PC64 L
1.1 sec. after the 2nd Drawer 1.1sec

Vertical Transport Sensor PC64 H

is blocked (L). PC54 L
1134T06TAA

<Multi Bypass Misfeed>

Type Detection Timing

The Transport Roller Sensor
ON
PC54 is not blocked (L) approx.
Bypass paper CL3 OFF
0.91 sec. after the Manual Feed 0.91sec
take-up failure
Paper Take-Up Clutch CL3 is H
detection
energized. PC54 L
1134T07TAA

T-9
<Transport/Separator Misfeed>

Type Detection Timing

TRON
Trailing edge PC54 is not unblocked (H) "T"
detection by seconds (which depends on the T
Transport paper size) after the TRON signal H
PC54 L
Roller Sensor is input.
A3 lengthwise : T=approx. 1.7 sec.
PC54
1134T38TCB

Leading edge PC55 is not blocked (L) approx. H

detection by within 0.48 sec. after the PC54 L
0.48sec
Paper Leading Transport Roller Sensor PC54 is
H
Edge Detecting blocked (L).
PC55 L
Sensor PC55
1134T09TAA

Trailing edge PC55 is not unblocked (H) H

detection by approx. within 0.38 sec. after the PC54 L 0.38sec
Paper Leading Transport Roller Sensor PC54 is
Edge Detecting unblocked (H). H
Sensor PC55 PC55 L
1134T10TAA

<Fusing/Exit Misfeed>

Type Detection Timing

S53 is not turned OFF (L) approx. TRON

Leading edge
1.87 sec. after the TRON signal 1.87sec
detection by
is input.
Paper Exit ON
Switch S53 S53 OFF
1134T11TAA

S53 is not turned ON (H) approx. H

Trailing edge
1.99 sec. after the Paper Leading PC55 L
detection by 1.99sec
Edge Detecting Sensor PC55 is
Paper Exit ON
unblocked (H).
Switch S53 S53 OFF
1134T12TAA

T-10
3. Misfeed Clearing Procedures

3-1. Copier Take-Up Misfeed

Symbol Name
PC54 Transport Roller Sensor
PC56 1st Drawer Paper Take-Up
Sensor
CL1 PWB-F
PC57 2nd Drawer Paper Take-Up
Sensor
M12 PC63
PC54 PC63 1st Drawer Vertical Transport
PWB-A Sensor
M11 PC56
PC64 PC64 2nd Drawer Vertical Transport
PC57 Sensor
M11 1st Drawer Paper Take-Up
Motor
M12 2nd Drawer Paper Take-Up
Motor
CL1 Transport Roller Clutch
PWB-F S/P Board
PWB-A Master Board

1134C15TAA

T-11
◆ Copier Take-Up Misfeed Clearing Procedure

Symptom Step Check Item Result Action

• Paper is Does the paper being used meet product Instruct the user to use
not taken 1 specifications? NO the paper that meets
up at all. product specifications.
• Paper is Is the paper curled, wavy or damp? Change the paper.
at a stop 2 YES Instruct the user on the
before storage of paper.
the
Does the Size (Length/Width) Guide Change the Size Guide
Paper 3 NO
position match the paper used? mounting position.
Take-Up
Sensor. Are the Paper Take-Up Roll and Paper Clean or change the
Separator Roll deformed, worn, or dirty Paper Take-Up Roll
4 YES
with paper dust? and/or Paper Separator
Roll.
Do the Paper Take-Up Motors M11, M12 • Change PWB-F or
rotate when the Start Key is turned ON? NO PWB-A.
5
• Check M11 and M12.
YES Check for overload.
• Paper is Are the Vertical Transport Rollers Change or clean the
at a stop 1 deformed, worn, or dirty with paper dust? YES Vertical Transport
in the Rollers.
Vertical
Is the Paper Take-Up or Vertical Transport Correct, change, or
Transport 2 YES
Guide Plate deformed or dirty? clean.
Section.
Check the operation of the Transport
Roller Clutch CL1 as described below (see
T-4):
1) Make sure that the port is BPA4 on
PWB-A (IC4A).
2) Select "I/O Port Data".
3) Is the data of BPA4 on PWB-A (IC4A) Change PWB-A.
"1"?
PWB-A APA7-0 111 1 1 111
(IC4A) APB7-0 H L H HHL
3 APC7-0 10 1 L H H NO
BPA7-0 111 1 1 1

Change Next

1134T125CA

4) By pressing the "Change" key to To Step 4 or 6.

change the data from "1" to "0", does
YES
CL1 operates? (Check that CL1 makes
a sound.)
5) By making a "Board Check" via "I/O YES Change PWB-A.
Check" in the Tech. Rep. mode, is the
Change CL1.
malfunction code "C0324" displayed? NO

T-12
Symptom Step Check Item Result Action
When 1st Drawer is used
Check the 1st Drawer Paper Take-Up
Sensor PC56 as described below (see
T-3):
1) Make sure that the port is PC1 on
PWB-F (IC1F).
2) Select "I/O Port Data".
3) Is the data of PC1 on PWB-F (IC1F) Check the operation of
"H"? the Actuator.
IC Port Data 1/8 BackUp Menu

IC Port 7 6 5 4/3 2 1 0
PWB-A BPC7-0 1111 NO
4 (IC5A) 3-0
PWB-F PB3-0/PA3-0 11111111
(IC1F) PD3-0/PC3-0 HHLLHH
PF3-0/PE3-0 H H1134T126CA
11HH00

4) Operate the Actuator to block PC56.

5) Select "I/O Port Data" again. Has the Change PC56.
data of PC1 on PWB-F (IC1F) changed
from "H" to "L"?
IC Port Data 1/8 BackUp Menu

IC Port 7 6 5 4/3 2 1 0
NO
PWB-A BPC7-0 1111
(IC5A) 3-0
PWB-F PB3-0/PA3-0 11111111
(IC1F) PD3-0/PC3-0 HHLLLH
PF3-0/PE3-0 H H1134T127CA
11HH00

Check the 1st Drawer Vertical Transport

Sensor PC63 as described below (see
T-3):
1) Make sure that the port is PG2 on
PWB-F (IC1F).
2) Select "I/O Port Data".
3) Is the data of PG2 on PWB-F (IC1F) Check the operation of
"H"? the Actuator.

IC Port Data 1/8 BackUp Menu

IC Port 7 6 5 4/3 2 1 0
PWB-A BPC7-0 1111
(IC5A) 3-0
NO
PWB-F PB3-0/PA3-0 11111111
(IC1F) PD3-0/PC3-0 HHLLLH
5 PF3-0/PE3-0 HH11HH00
PH3-0/PG3-0 00LHHL
PWB-A(200) PB3-0/PA3-0 1 111111
1134T128CA
( ) /
4) Operate the Actuator to block PC63.
5) Select "I/O Port Data" again. Has the NO Change PC63.
data of PG2 on PWB-F (IC1F) changed Change PWB-F or
from "H" to "L"? PWB-A.
IC Port Data 1/8 BackUp Menu

IC Port 7 6 5 4/3 2 1 0
PWB-A BPC7-0 1111 YES
(IC5A) 3-0
PWB-F PB3-0/PA3-0 11111111
(IC1F) PD3-0/PC3-0 HHLLLH
PF3-0/PE3-0 HH11HH00
PH3-0/PG3-0 00LLHL
PWB-A(200) PB3-0/PA3-0 1 111111
1134T129CA
(I 1 ) P 3 0/P 3 0 LLHHLL

T-13
Symptom Step Check Item Result Action
When 2nd Drawer is used
Check the 2nd Drawer Paper Take-Up
Sensor PC57 as described below (see
T-3):
1) Make sure that the port is PC0 on
PWB-F (IC1F).
2) Select "I/O Port Data".
3) Is the data of PC0 on PWB-F (IC1F) Check the operation of
"H"? the Actuator.

IC Port Data 1/8 Menu

IC Port 7 6 5 4/3 2 1 0
PWB-A BPC7-0 1111 NO
(IC5A) 3-0
6 PWB-F PB3-0/PA3-0 11111111
(IC1F) PD3-0/PC3-0 HHLLHH
PF3-0/PE3-0 H H1134T130CA
11HH00
PH3 0/PG3 0 00LLHL
4) Operate the Actuator to block PC57.
5) Select "I/O Port Data" again. Has the Change PC57.
data of PC0 on PWB-F (IC1F) changed
from "H" to "L"?

IC Port Data 1/8 Menu

IC Port 7 6 5 4/3 2 1 0
NO
PWB-A BPC7-0 1111
(IC5A) 3-0
PWB-F PB3-0/PA3-0 11111111
(IC1F) PD3-0/PC3-0 HHLLHL
PF3-0/PE3-0 H H1134T131CA
11HH00
PH3 0/PG3 0 00LLHL
Check the 2nd Drawer Vertical Transport
Sensor PC64 as described below (see
T-3):
1) Make sure that the port is PG1 on
PWB-F (IC1F).
2) Select "I/O Port Data".
3) Is the data of PG1 on PWB-F (IC1F) Check the operation of
"H"? the Actuator.
IC Port Data 1/8 Menu

IC Port 7 6 5 4/3 2 1 0
PWB-A BPC7-0 1 1 1 1
(IC5A) 3-0 NO
PWB-F PB3-0/PA3-0 1 1 1 1 1 1 1 1
(IC1F) PD3-0/PC3-0 H H L L H H
7 PF3-0/PE3-0 H H 1 1 H H 0 0
PH3-0/PG3-0 0 0 L H H L
PWB-A(200) PB3-0/PA3-0 1 1 1 1 1 1 1
1134T132CA
(I 1A) PD3 0/P 3 0 L L H H L L
4) Operate the Actuator to block PC64.
5) Select "I/O Port Data" again. Has the NO Change PC64.
data of PG1 on PWB-F (IC1F) changed Change PWB-F or
from "H" to "L"? PWB-A.
IC Port Data 1/8 Menu

IC Port 7 6 5 4/3 2 1 0
PWB-A BPC7-0 1111 YES
(IC5A) 3-0
PWB-F PB3-0/PA3-0 11111111
(IC1F) PD3-0/PC3-0 HHLLHH
PF3-0/PE3-0 HH11HH00
PH3-0/PG3-0 00LHLL
PWB-A(200) PB3-0/PA3-0 1 111111
1134T133CA

T-14
Symptom Step Check Item Result Action
• Paper is Are the Transport Rollers deformed, worn, Change or clean.
1 YES
at a stop or dirty with paper dust?
at the
Refer to Step 3. on page T-10 and check
Transport 2
the Transport Roller Clutch (CL1).
Rollers
Section. Check the Transport Roller Sensor PC54
as described below (see T-3):
1) Make sure that the port is APB5 on
PWB-A (IC5A).
2) Select "I/O Port Data".
3) Is the data of APB5 on PWB-A (IC5A) Check the operation of
"H"? the Actuator.
P67 0
PWB-A APA7-0 L L L L
(IC5A) APB7-0 H H H L H LHL
APC7-0 H H H L 1 111
BPA7-0 1 1 0 0 1 01
BPB7-0 L L H
NO
Change Next
3

4) Operate the Actuator with a sheet of

paper to block PC54.
5) Select "I/O Port Data" again. Has the NO Change PC54.
data of APB5 on PWB-A (IC5A)
Change PWB-A.
changed from "H" to "L"?
P67 0
PWB-A APA7-0 L L L L
(IC5A) APB7-0 H H L L H LHL
APC7-0 H H H L 1 111
BPA7-0 1 1 0 0 1 01 YES
BPB7-0 L L H

Change Next

1134T135CA

T-15
3-2. Transport/Separator Misfeed

Symbol Name
PC54 Transport Roller Sensor
PC55 Paper Leading Edge Detecting
Sensor
CL2 Synchronizing Roller Clutch
SL1 Separator Solenoid
M4 Suction Fan Motor
PWB-A Master Board
HV1 High Voltage Unit

1136T009AA

1134C03TAA

T-16
◆ Transport/Separator Misfeed Clearing Procedure

Symptom Step Check Item Result Action

• Paper is Is the paper curled, wavy or damp? Change the paper.
at a stop 1 YES Instruct the user on the
at the storage of paper.
Synchron-
Check the operation of the Synchronizing
izing
Roller Clutch CL2 as described below (see
Roller.
T-4):
1) Make sure that the port is BPA3 on
PWB-A (IC4A).
2) Select "I/O Port Data".
3) Is the data of BPA3 on PWB-A (IC4A) Change PWB-A.
"1"?

PWB-A APA7-0 111 1 1 111

(IC4A) APB7-0 H L H HHL
2 APC7-0 10 1 L H H
NO
BPA7-0 111 1 1 1

Change Next

1134T136CA

4) By pressing the "Change" key to To Step 3.

change the data from "1" to "0", does
YES
CL2 operate? (Check that CL2 makes a
sound.)
5) By making a "Board Check" via "I/O YES Change PWB-A.
Check" in the Tech. Rep. mode, is the
NO Change CL2.
malfunction code "C0325" displayed?

Is a given length of loop formed before the Adjust the paper loop
Synchronizing Roller? length using Loop
3 NO Length Adjustment
(Drawer) in the Tech.
Rep. mode.
Refer to Step 3. on page T-13 and check
4
the Transport Roller Sensor PC54.
Check the Paper Leading Edge Detecting
Sensor PC55 as described below (see T-3):
5 1) Make sure that the port is APB7 on
PWB-A (IC5A).
2) Select "I/O Port Data".

T-17
Symptom Step Check Item Result Action
3) Is the data of APB7 on PWB-A (IC5A) Check the operation of
"H"? the Actuator.
P67-0
PWB-A APA7-0 L L L L
(IC5A) APB7-0 H H H L H LHL
APC7-0 H H H L 1 111
1 1 0 0 1 01
BPA7-0
NO
BPB7-0 L L H

Change Next

1134T137CA
4) Operate the Actuator with a sheet of
paper to block PC55.
5) Select "I/O Port Data" again. Has the NO Change PC55.
data of APB7 on PWB-A (IC5A)
Change PWB-A.
changed from "H" to "L"?
PWB-A APA7-0 L L L L
(IC5A) APB7-0 L H H L H LHL
APC7-0 H H H L 1 111
BPA7-0 1 1 0 0 1 01
YES
BPB7-0 L L H

Change Next

1134T138CA

• Paper is Is the Pre-Image Transfer Guide Plate Correct, change or clean

1 YES
at a stop deformed or dirty? the Guide Plate.
near the
Are the Charge Corona Wires deteriorated Clean the Wires or
PC Drum.
2 or dirty? YES change the Coronas
Unit.
Is the Paper Guide above the Paper Change or clean the
3 YES
Separator Corona deformed or dirty? Paper Guide.
Are the Synchronizing Rollers deformed, Change or clean the
4 YES
worn, or dirty with paper dust? Synchronizing Rollers.
Check the Paper Separator Corona Change PWB-A.
YES
Remote signal from PWB-A.
5 • Does the malfunction code "C0322" Change the High
appear when "Board Check" of "I/O NO Voltage Unit (HV1) or
Check" in the Tech. Rep. mode is made? Coronas Unit.

• Paper is Check the operation of the Separator

wedged Solenoid SL1 (see T-4).
at the 1 1) Make sure that the port is APC6 on
Paper
PWB-A (IC4A).
Separator
2) Select "I/O Port Data".
Fingers.

T-18
Symptom Step Check Item Result Action
3) Is the data of APC6 on PWB-A (IC4A) Change PWB-A.
"1"?
PWB-A APA7-0 111 1 1 111
(IC4A) APB7-0 H L H HHL
APC7-0 10 1 L H H NO
BPA7-0 111 1 1 1

Change Next

1134T139CA

4) By pressing the "Change" key to To Step 2.

change the data from "1" to "0", does
YES
SL1 operate? (Check that SL1 makes a
sound.)
By making a "Board Check" via "I/O YES Change PWB-A.
2 Check" in the Tech. Rep. mode, is the
Change SL1.
malfunction code "C031F" displayed? NO

Are the Paper Separator Fingers deformed Correct, change or clean

3 or dirty? YES the Paper Separator
Fingers.
• Paper is When the Main Drive Motor is run, do the Check the drive gear
1 NO
at a stop Suction Belts turn? and timing belt.
on the
Check whether the Suction Fan Motor M4
Suction
is switched from half speed to full speed
Belts.
when the Start Key is turned ON (see T-4).
1) Make sure that the port is APC5 on
PWB-A (IC4A).
2) Select "I/O Port Data".
3) Is the data of APC5 on PWB-A (IC4A) Change PWB-A.
"0" when M4 is running at half speed?
2
PWB-A APA7-0 111 1 1 111
(IC4A) APB7-0 H L H HHL
APC7-0 10 1 L H H NO
BPA7-0 111 1 1 1

Change Next

1134T140CA

4) By pressing the "Change" key to Check the Transport

change the data from "0" to "1", is M4 YES Belt.
switched from half speed to full speed?
By making a "Board Check" via "I/O YES Change PWB-A.
3 Check" in the Tech. Rep. mode, is the
NO Change M4.
malfunction code "C0320" displayed?

T-19
3-3. Multi Bypass Misfeed

Symbol Name
PC51 Manual Feed Paper Empty
Sensor
SL4 Manual Feed Paper Take-Up
Solenoid
CL3 Manual Feed Paper Take-Up
Clutch
PWB-A Master Board

1136T010AA

1134C05TAA

T-20
◆ Multi Bypass Misfeed Clearing Procedure

Symptom Step Check Item Result Action

• Paper is Is the following screen displayed on the To Step 3.
not taken 1 Touch Panel when a sheet of paper is
up at all. placed on the Multi Bypass Table.
Auxiliary Finishing Orig.Copy Basics

Ready to Copy.
1
Auto Expo. x1.000 Manual YES

Exposure Zoom Paper

1134T223CA

Check the Manual Feed Paper Empty

Sensor PC51 as described below (see T-3):
1) Make sure that the port is APB6 on
PWB-A (IC5A).
2) Select "I/O Port Data".
3) Is the data of APB6 on PWB-A (IC5A) Check the operation of
"H" with no paper placed? the Actuator.
PWB-A APA7-0 L L L L
(IC5A) APB7-0 H H H L H LHL
2 APC7-0 H H H L 1 111
BPA7-0 1 1 0 0 1 01 NO
BPB7-0 L L H

Change Next

4) Operate the Actuator with a sheet of

paper to block PC51.
5) Select "I/O Port Data" again. Has the NO Change PC51.
data of APB6 on PWB-A (IC5A) Change PWB-A.
changed from "H" to "L"? YES

Does the paper being used meet product Instruct the user to use
3 specifications? NO the paper that meets
product specifications.
Is the paper curled, wavy or damp? Change the paper.
4 YES Instruct the user on the
storage of paper.
Check the operation (lowering the Paper
Take-Up Rolls) of the Manual Feed Paper
Take-Up Solenoid SL4 as described below
5 (see T-4):
1) Make sure that the port is APC0 on
PWB-A (IC5A).
2) Select "I/O Port Data".

T-21
Symptom Step Check Item Result Action
3) Is the data of APC0 on PWB-A (IC5A) Change PWB-A.
"1"?
PWB-A APA7-0 L L L L
(IC5A) APB7-0 H H H L H LHL
APC7-0 H H H L 1 111
1 1 0 0 1 01
NO
BPA7-0
BPB7-0 L L H

Change Next

1134T142CA

4) By pressing the "Change" key to To Step 9.

change the data from "1" to "0", does
YES
SL4 operate to lower the Paper
Take-Up Rolls?
By making a "Board Check" via "I/O YES Change PWB-A.
6 Check" in the Tech. Rep. mode, is the
Change SL4 or adjust its
malfunction code "C0316" displayed? NO
stroke.
Check the operation of the Manual Feed
Paper Take-Up Clutch CL3 as described
below (see T-4):
1) Make sure that the port is BPA2 on
PWB-A (IC4A).
2) Select "I/O Port Data".
3) Is the data of BPA2 on PWB-A (IC4A) Change PWB-A.
"1"?
7 PWB-A APA7-0 111 1 1 111
(IC4A) APB7-0 H L H HHL
APC7-0 10 1 L H H NO
BPA7-0 111 1 1 1

Change Next

1134T143CB

4) By pressing the "Change" key to To Step 9.

change the data from "1" to "0", does
YES
CL3 operate? (Check that CL3 makes
a sound.)
By making a "Board Check" via "I/O YES Change PWB-A.
8 Check" in the Tech. Rep. mode, is the
NO Change CL3.
malfunction code "C0326" displayed?

Are the Pressure Pad and Guide Plate Clean or change the
9 deformed or dirty? YES Pressure Pad and Guide
Plate.
Are the Manual Feed Paper Take-Up Rolls Clean or change the
10 deformed, worn, or dirty with paper dust? YES Manual Feed Take-Up
Rolls.

T-22
3-4. Fusing/Exit Misfeed

Symbol Name
S53 Paper Exit Switch
M4 Suction Fan Motor
PWB-A Master Board

1136T011AA

1134C06TAA

T-23
◆ Fusing/Exit Misfeed Clearing Procedure

Symptom Step Check Item Result Action

• Paper is Is the paper curled, wavy or damp? Change the paper.
at a stop 1 YES Instruct the user on the
before storage of paper.
the
Is the Pre-Fusing Guide Plate deformed or Correct, change or clean
Fusing
2 dirty? YES the Pre-Fusing Guide
Roller.
Plate.
Refer to Steps 1, 2 and 3 on page T-17,
3 and check the rotation of the Suction Belts
and Suction Fan Motor M4.
• Paper is Are the Fusing Rollers scratched or dirty? Clean or change the
at a stop 1 Also, has the time to change the Fusing YES Fusing Rollers.
in the Rollers come?
Fusing
Are the Paper Separator Fingers Correct, change, or
Roller
2 deformed, worn or dirty? YES clean the Paper
Section.
Separator Fingers.
Is the Oil Roller dirty? Clean or change the Oil
3 Also, has the time to change the Oil Roller YES Roller.
come?
• Paper is Check the Paper Exit Switch S53 as
at a stop described below (see T-3):
in the
1) Make sure that the port is APB5 on
Paper
PWB-A (IC4A).
Exit Roll
2) Select "I/O Port Data".
Section.
3) Is the data of APB5 on PWB-A (IC4A) Check the operation of
"H"? the Actuator.
PWB-A APA7-0 111 1 1 111
(IC4A) APB7-0 H L H HHL
APC7-0 10 1 L H H
BPA7-0 111 1 1 1 NO
1 Change Next

1134T144CA

4) Operate the Actuator with a sheet of

paper to turn OFF S53.
5) Select "I/O Port Data" again. Has the NO Change S53.
data of APB5 on PWB-A (IC4A)
Change PWB-A.
changed from "H" to "L"?
PWB-A APA7-0 111 1 1 111
(IC4A) APB7-0 L L H HHL
APC7-0 10 1 L H H YES
BPA7-0 111 1 1 1

Change Next

1134T145CA

T-24
3-5. PF-202 Paper Feed Cabinet Take-Up Misfeed

Symbol Name
PC21 3rd Drawer Paper Take-Up
Sensor
PC22 Vertical Transport Sensor 4
PC29 4th Drawer Paper Take-Up
Sensor
M21 Vertical Transport Drive Motor
M22 3rd Drawer Paper Take-Up
Motor
M23 4th Drawer Paper Take-Up
Motor
PWB-A EP3050/EP4050 Master Board
PWB-A PF-202 Control Board

1136T004AA

1134C23TAA

T-25
◆ PF202 Take-Up Misfeed Clearing Procedure

Symptom Step Check Item Result Action

• Paper is Does the paper being used meet product Instruct the user to use
not taken 1 specifications? NO the paper that meets
up at all. product specifications.
• Paper is
Is the paper curled, wavy or damp? Change the paper.
at a stop
2 YES Instruct the user on the
before
storage of paper.
the
Paper Are the Paper Take-Up Motors M22, M23 YES Check for overload.
Take-Up rotating when the Start Key is turned ON?
Change PF-202 PWB-A
Sensor. 3 or EP3050/EP4050
NO
PWB-A.
Check M22 and M23.
Are the Paper Take-Up Roll and Paper Clean or change the
4 Separator Roll deformed, worn, or dirty YES Paper Take-Up Roll and
with paper dust? Paper Separator Roll.
• Paper is Is the Vertical Transport Drive Motor M21 Change PF-202 PWB-A
at a stop rotating when the Start Key is turned ON? or EP3050/EP4050
NO
in the PWB-A.
Vertical Check M21.
Transport 1
YES Check for overload.
Section.
Are the Vertical Transport Rollers and Clean or change the
Guide Plate deformed, worn, or dirty with YES Rollers and Guide Plate.
paper dust?
When 3rd Drawer is used
Check the 3rd Drawer Paper Take-Up
Sensor PC21 as described below (see T-3):
1) Make sure that the port is PE3 on
PWB-A (200) (IC1A).
2) Select "I/O Port Data".
3) Is the data of PE3 on PWB-A (200) Check the operation of
(IC1A) "H"? the Actuator.

IC Port Data 4/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
NO
2 PWB-A(200) PF3-0/PE3-0 LL00HL00
(IC1A) PH3-0/PG3-0 00HL00

4) Operate the Actuator with a sheet of

paper to block PC21.
5) Select "I/O Port Data" again. Has the Change PC21.
data of PE3 on PWB-A (200) (IC1A)
changed from "H" to "L"?
IC Port Data 4/8 BackUp Menu NO
IC Port 3 2 1 0/3 2 1 0
PWB-A(200) PF3-0/PE3-0 LL00LL00
(IC1A) PH3-0/PG3-0 00LL00

1134T147CA

T-26
Symptom Step Check Item Result Action
Check the Vertical Transport Sensor 4
PC22 as described below (see T- 3):
1) Make sure that the port is PC2 on
PWB-A (200) (IC1A).
2) Select "I/O Port Data".
3) Is the data of PC2 on PWB-A (200) Check the operation of
(IC1A) "H"? the Actuator.
PH3 0/PG3 0 00LHHL
PWB-A(200) PB3-0/PA3-0 1 111111
(IC1A) PD3-0/PC3-0 LLHHLL
NO
3 Change Next

1134T148CA

4) Operate the Actuator to block PC22.

5) Select "I/O Port Data" again. Has the NO Change PC22.
data of PC2 on PWB-A (200) (IC1A)
Change PF-202 PWB-A
changed from "H" to "L"?
PH3 0/PG3 0 00LHHL or EP3050/EP4050
PWB-A(200) PB3-0/PA3-0 1 111111 PWB-A.
(IC1A) PD3-0/PC3-0 LLHLLL YES
Change Next

1134T149CA

When 4th Drawer is used

Check the 4th Drawer Paper Take-Up
Sensor PC29 as described below (see T-3):
1) Make sure that the port is PB3 on
PWB-A (200) (IC2A).
2) Select "I/O Port Data".
3) Is the data of PB3 on PWB-A (200) Check the operation of
(IC2A) "H"? the Actuator.
4
PWB-A(200) PB3-0/PA3-0 HLHHLL
(IC2A) PD3-0/PC3-0 L
PF3-0/PE3-0
PH3-0/PG3-0
PWB-A(100) PB3-0/PA3-0 NO
(IC1A) PD3-0/PC3-0

Change Next

1134T150CA

4) Operate the Actuator with a sheet of

paper to block PC29.

T-27
Symptom Step Check Item Result Action
5) Select "I/O Port Data" again. Has the Change PC29.
data of PB3 on PWB-A (200) (IC2A)
changed from "H" to "L"?

PWB-A(200) PB3-0/PA3-0 LLHHLL

(IC2A) PD3-0/PC3-0 L
PF3-0/PE3-0 NO
PH3-0/PG3-0
PWB-A(100) PB3-0/PA3-0
(IC1A) PD3-0/PC3-0

Change Next

1134T151CA

Refer to Step 3 on page T-27 and check

5
the Vertical Transport Sensor 4 PC22.

T-28
3-6. PF-102 Paper Feed Cabinet Take-Up Misfeed

Symbol Name
PC21 3rd Drawer Paper Take-Up
Sensor
PC22 Vertical Transport Sensor 4
M21 Vertical Transport Drive Motor
M22 3rd Drawer Paper Take-Up
Motor
PWB-A EP3050/EP4050 Master Board
PWB-A PF-102 Control Board

1136T003AA

1134C24TAA

T-29
◆ PF-102 Take-Up Misfeed Clearing Procedure

Symptom Step Check Item Result Action

• Paper is Does the paper being used meet product Instruct the user to use
not taken 1 specifications? NO the paper that meets
up at all. product specifications.
• Paper is
Is the paper curled, wavy or damp? Change the paper.
at a stop
2 YES Instruct the user on the
before
storage of paper.
the 3rd
Drawer Is the 3rd Drawer Paper Take-Up Motor Change PF-102 PWB-A
Paper M22 rotating when the Start Key is turned or EP3050/EP4050
NO
Take-Up 3 ON? PWB-A.
Sensor Check M22.
PC21.
YES Check for overload.
Are the Paper Take-Up Roll and Paper Clean or change the
4 Separator Roll deformed, worn, or dirty YES Paper Take-Up Roll and
with paper dust? Paper Separator Roll.
• Paper is Is the Vertical Transport Drive Motor M21 Change PF-102 PWB-A
at a stop rotating when the Start Key is turned ON? or EP3050/EP4050
NO
in the PWB-A.
Vertical Check M21.
Transport 1
YES Check for overload.
Section.
Are the Vertical Transport Rollers and Clean or change the
Guide Plate deformed, worn, or dirty with YES Rollers and Guide Plate.
paper dust?
Check the 3rd Drawer Paper Take-Up
Sensor PC21 as described below (see T-3):
1) Make sure that the port is PE3 on
PWB-A (400) (IC1A).
2) Select "I/O Port Data".
3) Is the data of PE3 on PWB-A (400) Check the operation of
(IC1A) "H"? the Actuator.
IC Port Data 6/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
NO
PWB-A(400) PF3-0/PE3-0 HH00HL
2 (IC1A) PH3-0/PG3-0 00LL00

1134T152CA
4) Operate the Actuator with a sheet of
paper to block PC21.
5) Select "I/O Port Data" again. Has the Change PC21.
data of PE3 on PWB-A (400) (IC1A)
changed from "H" to "L"?

IC Port Data 6/8 BackUp Menu NO

IC Port 3 2 1 0/3 2 1 0
PWB-A(400) PF3-0/PE3-0 HH00LL
(IC1A) PH3-0/PG3-0 00LL00

1134T153CA

T-30
Symptom Step Check Item Result Action
Check the Vertical Transport Sensor 4
PC22 as described below (see T- 3):
1) Make sure that the port is PC2 on
PWB-A (400) (IC1A).
2) Select "I/O Port Data".
3) Is the data of PC2 on PWB-A (400) Check the operation of
(IC1A) "H"? the Actuator.
PH3-0/PG3-0 00LHHL
PWB-A(400) PB3-0/PA3-0 1 1 11 1
(IC1A) PD3-0/PC3-0 HLHH L
NO
3 Change Next

1134T154CA

4) Operate the Actuator with a sheet of

paper to block PC22.
5) Select "I/O Port Data" again. Has the NO Change PC22.
data of PC2 on PWB-A (400) (IC1A)
Change PF-102 PWB-A
changed from "H" to "L"?
PH3-0/PG3-0 00LHHL
or EP3050/EP4050
PWB-A(400) PB3-0/PA3-0 1 1 11 1 PWB-A.
(IC1A) PD3-0/PC3-0 HLHL L YES
Change Next

1134T155CA

T-31
3-7. Duplex Unit Vertical Transport/Entry Misfeed

Symbol Name
PC12 Duplex Unit Vertical Transport
Sensor 2
PC13 Duplex Unit Turnover Path
Sensor
PC14 Duplex Unit Paper Entry Sensor
PC15 Duplex Unit Paper Empty
Sensor
PC30 Duplex Unit Vertical Transport
Sensor 1
SL31 Duplex Unit Gate Switching
Solenoid
SL5 Exit/Duplex Solenoid
M31 Duplex Unit Drive Motor
PWB-A EP3050/EP4050 Master Board
PWB-A PF-202, PF-102, PF-2D Control
Board
PWB-G Control Board

1134C25TAA

T-32
◆ Duplex Unit Vertical Transport Misfeed Clearing Procedure

Symptom Step Check Item Result Action

Is the paper curled, wavy or damp? Change the paper.
YES Instruct the user on the
storage of paper.
• Paper is Check the operation of the Exit/Duplex
at a stop Solenoid SL5 as described below (see T-4):
in the
1) Make sure that the port is BPA7 on
Exit
PWB-A (IC4A).
Section.
2) Select "I/O Port Data".
3) Is the data of BPA7 on PWB-A (IC4A) Change
"1"? EP3050/EP4050 PWB-A.
H H L LLH
1 PWB-A APA7-0 111 1 1 111
(IC4A) APB7-0 L L H HHL
APC7-0 10 1 L H H NO
BPA7-0 111 1 1 1

Change Next

1134T156CA

4) By pressing the "Change" key to To Step 3.

change the data from "1" to "0", does
YES
SL5 operate? (Check that SL5 makes a
sound.)
By making a "Board Check" via "I/O Change
YES
2 Check" in the Tech. Rep. mode, is the EP3050/EP4050 PWB-A.
malfunction code "C0321" displayed?
NO Change SL5.
Are the Exit/Duplex Switching Plate and Change or clean the
3 Upper and Lower Guide Plates deformed NO Plates.
or dirty?

T-33
Symptom Step Check Item Result Action
• Paper is Run the Duplex Unit Drive Motor M31
at a stop (refer to page T-4) and check the
in the operations of the Duplex Unit Vertical
Vertical Transport Roll and Duplex Unit Drive
Transport Connection.
Section
1) Open the middle left door.
of the
Make sure that the port is PB3 on
Duplex
2) PWB-G (Dup) (IC1G).
Unit.
Select "I/O Port Data".
By pressing the "Change" key to
1
3) change the data of PB3 on PWB-G
4) (Dup) (IC1G) from "1" to "0", drive M31.

PWB-G(Dup) PB3-0/PA3-0 11 1 11
(IC1G) PD3-0/PC3-0 LHHH

Change Next

1134T157CA

5) Do the Duplex Unit Vertical Transport Check the gears, belts

NO
Roll and Duplex Unit Drive Connection and rollers.
operate properly?

Check the Duplex Unit Vertical Transport

Sensor 1 PC30 as described below (see
T-3):
1) Make sure that the port is BPB6 on
PWB-A (IC4A).
2) Select "I/O Port Data".
3) Is the data of BPB6 on PWB-A (IC4A) Check the operation of
"H"? the Actuator.
IC Port Data 2/8 BackUp Menu

IC Port 7 6 5 4/3 2 1 0 NO
2 PWB-A BPB7-0 LHHHHHHH
(IC4A) BPC7-0 HLLLHHHH
3-0
HHLLHH
1134T158CA
11 00
4) Operate the Actuator to block PC30.
5) Select "I/O Port Data" again. Has the Change PC30.
data of BPB6 on PWB-A (IC4A)
changed from "H" to "L"?

IC Port Data 2/8 BackUp Menu NO

IC Port 7 6 5 4/3 2 1 0
PWB-A BPB7-0 LLHHHHHH
(IC4A) BPC7-0 HLLLHHHH
1134T159CA
HHLLHH

T-34
Symptom Step Check Item Result Action
Check the Duplex Unit Vertical Transport
Sensor 2 PC12 as described below (see
T-3):
1) Make sure that the port is BPB5 on
PWB-A (IC4A).
2) Select "I/O Port Data".
3) Is the data of BPB5 on PWB-A (IC4A) Check the operation of
"H"? the Actuator.
IC Port Data 2/8 BackUp Menu

IC Port 7 6 5 4/3 2 1 0 NO
3 PWB-A BPB7-0 LHHHHHHH
(IC4A) BPC7-0 HLLLHHHH
3-0
HHLLHH
1134T160CA
11 00
4) Operate the Actuator to block PC12.
5) Select "I/O Port Data" again. Has the NO Change PC12.
data of BPB5 on PWB-A (IC4A)
Change
changed from "H" to "L"?
EP3050/EP4050 PWB-A.
IC Port Data 2/8 BackUp Menu

IC Port 7 6 5 4/3 2 1 0
YES
PWB-A BPB7-0 LHLHHHHH
(IC4A) BPC7-0 HLLLHHHH
3-0
HHLLHH
1134T161CA
11 00
• Paper is Run the Duplex Unit Drive Motor M31
at a stop (refer to page T-4) and check the
in the operations of the Paddle Roller, Slip Roller
Turnover and Duplex Unit Drive Connection.
Section
1) Open the lower left door.
of the
2) Make sure that the port is PB3 on
Duplex
PWB-G (Dup) (IC1G).
Unit.
1 3) Select "I/O Port Data".
4) By pressing the "Change" key to
change the data of PB3 on PWB-G
(Dup) (IC1G) from "1" to "0", drive M31.

PWB-G(Dup) PB3-0/PA3-0 11 1 11
(IC1G) PD3-0/PC3-0 LHHH

Change Next

1134T157CA

5) Do the Duplex Unit Vertical Transport Check the gears, belts

Roll and Duplex Unit Drive Connection NO and rollers.
operate properly?

T-35
Symptom Step Check Item Result Action
Are the Paddle, Roller, Slip Roller and Clean or change the
Release Lever deformed, worn, or dirty Rollers.
2 YES
with paper dust? Check the Release
Lever mechanism.
Check the Duplex Unit Turnover Path
Sensor PC13 as described below (see T-3):
1) Make sure that the port is PB0 on
PWB-A (200) (IC2A) when PF-202 is
used, PB0 on PWB-A (400) (IC2A)
when PF-102 is used, or PB0 on
PWB-A (100) (IC2A) when PF-2D is
used.
2) Select "I/O Port Data".
3) Is the data of PB0 on PWB-A (200) Check the operation of
(IC2A), PB0 on PWB-A (400) (IC2A), or the Actuator.
PB0 on PWB-A (100) (IC2A) "H"?
<When PF-202 is used>

IC Port Data 4/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
PWB-A(200) PF3-0/PE3-0 LL00HL00
(IC1A) PH3-0/PG3-0 00LL00
PWB-A(200) PB3-0/PA3-0 HLHHLL
3 (IC2A) PD3-0/PC3-0 H L

1134T163CA

<When PF-102 is used>

IC Port Data 6/8 BackUp Menu NO

IC Port 3 2 1 0/3 2 1 0
PWB-A(400) PF3-0/PE3-0 HH00HL
(IC1A) PH3-0/PG3-0 00LL00
PWB-A(400) PB3-0/PA3-0 LLHHL11
(IC2A) PD3-0/PC3-0 H LHHL

1134T164CB

<When PF-2D is used>

IC Port Data 5/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
PWB-A(100) PF3-0/PE3-0 L
(IC1A) PH3-0/PG3-0 00 00
PWB-A(100) PB3-0/PA3-0 LHHLH
(IC2A) PD3-0/PC3-0 L
PF3-0/PE3-0 H H1134T228CA
11HH00

4) Operate the Actuator to block PC13.

T-36
Symptom Step Check Item Result Action
5) Select "I/O Port Data" again. Has the NO Change PC13.
data of PB0 on PWB-A (200) (IC2A),
Change PF-202, PF-102
PB0 on PWB-A (400) (IC2A), or PB0 on
or PF-2D PWB-A or
PWB-A (100) (IC2A) changed from "H"
EP3050/EP4050 PWB-A.
to "L"?

<When PF-202 is used>

IC Port Data 4/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
PWB-A(200) PF3-0/PE3-0 LL00HL00
(IC1A) PH3-0/PG3-0 00LL00
PWB-A(200) PB3-0/PA3-0 HLHLLL
(IC2A) PD3-0/PC3-0 H L

1134T165CA

<When PF-102 is used>

YES
IC Port Data 6/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
PWB-A(400) PF3-0/PE3-0 HH00HL
(IC1A) PH3-0/PG3-0 00LL00
PWB-A(400) PB3-0/PA3-0 LLLHL11
(IC2A) PD3-0/PC3-0 H LHHL

1134T166CA

<When PF-2D is used>

IC Port Data 5/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
PWB-A(100) PF3-0/PE3-0
(IC1A) PH3-0/PG3-0 00 00
PWB-A(100) PB3-0/PA3-0 LHLLH
(IC1F) PD3-0/PC3-0 HHLLLH
PF3-0/PE3-0 H H1134T229CA
11HH00
PH3 0/PG3 0 00LHHL

T-37
◆ Duplex Unit Entry Misfeed Clearing Procedure

Symptom Step Check Item Result Action

• The Is the Paper Guide Mylar dirty or Clean or change the
1 YES
leading deformed? Mylar.
edge of
Check the Duplex Unit Entry Sensor 1
paper is
PC14 as described below (see T-3):
at a stop
inside the 1) Make sure that the port is PC1 on
Duplex PWB-G (Dup) (IC1G).
Unit. 2) Select "I/O Port Data".
3) Is the data of PC1 on PWB-G (Dup) Check the operation of
(IC1G) "H"? the Actuator.

PWB-G(Dup) PB3-0/PA3-0 11 1 11
(IC1G) PD3-0/PC3-0 LHHH
NO
Change Next

1134T167CA

4) Operate the Actuator with a sheet of

paper to block PC14.
5) By mounting the Duplex Unit, is the To Step 3.
Misfeed Screen displayed on the Touch
Panel?
2
Misfeed detected.
Remove misfeed at .

YES

1134T168CA

6) Select "I/O Port Data" again. Has the Change PC14.

data of PC1 on PWB-G (Dup) (IC1G) NO
changed from "H" to "L"?

PWB-G(Dup) PB3-0/PA3-0 11 1 11 Change PWB-G,

(IC1G) PD3-0/PC3-0 LHLH PF-202, PF-102 or
Change Next YES PF-2D PWB-A, or
EP3050/EP4050 PWB-A.
1134T169CA

T-38
Symptom Step Check Item Result Action
Check the operation of the Duplex Unit
Gate Switching Solenoid SL31 (see T-4).
1) Make sure that the port is PH1 on
PWB-G (Dup) (IC1G).
Select "I/O Port Data".
2)
3) Is the data of PH1 on PWB-G (Dup) Change PWB-G,
(IC1G) "1"? PF-202, PF-102 or
3 PF-2D PWB-A, or
IC Port Data 7/8 BackUp Menu
NO EP3050/EP4050 PWB-A.
IC Port 3 2 1 0/3 2 1 0
PWB-G(Dup) PB3-0/PA3-0 0000 HL
(IC1G) PD3-0/PC3-0 110000

1134T170CA

4) By pressing the "Change" key to NO Change SL31.

change the data from "1" to "0", does
Check the operation of
SL31 operate? (Check that SL31
YES the Gate Switching
makes a sound.)
Finger.
• Paper is Check the Duplex Unit Paper Empty
at a stop Sensor 1 PC15 as described below (see
in the T-3):
Exit
1) Make sure that the port is PC2 on
Section.
PWB-G (Dup) (IC1G).
2) Select "I/O Port Data".
3) Is the data of PC2 on PWB-G (Dup) Check the operation of
(IC1G) "H"? the Actuator.

PWB-G(Dup) PB3-0/PA3-0 11 1 11
(IC1G) PD3-0/PC3-0 LHHH
NO
1 Change Next

1134T171CA

4) Operate the Actuator with a sheet of

paper to block PC15.
5) Select "I/O Port Data" again. Has the NO Change PC15.
data of PC2 on PWB-G (Dup) (IC1G)
Change PWB-G,
changed from "H" to "L"?
PF-202, PF-102 or
PH3-0/PG3-0 00LHHL
PWB-G(Dup) PB3-0/PA3-0 11 1 11 PF-2D PWB-A, or
(IC1G) PD3-0/PC3-0 LLHH YES EP3050/EP4050 PWB-A.
Change Next

1134T172CA

T-39
3-8. Duplex Unit Take-Up Misfeed

Symbol Name
PC16 Duplex Unit Paper Take-Up
Sensor
PC17 Vertical Transport Sensor 3
SL33 Duplex Unit Pick-Up Solenoid
CL31 Duplex Unit Paper Take-Up
Clutch
M21 Vertical Transport Drive Motor
PWB-A EP3050/EP4050 Master Board
PWB-A PF-202, PF-102, PF-2D Control
Board
PWB-G Duplex Unit Control Board

1134C26TAA

T-40
◆ Duplex Unit Take-Up Misfeed Clearing Procedure

Symptom Step Check Item Result Action

Is the paper curled, wavy or damp? Change the paper.
YES Instruct the user on the
storage of paper.
• Paper is Check the operation of the Duplex Unit
not taken Pick-Up Solenoid SL33 as described below
up at all. (see T-4):
1) Make sure that the port is PB2 on
PWB-G (Dup) (IC1G).
2) Select "I/O Port Data".
3) Is the data of PB2 on PWB-G (Dup) Change PWB-G,
(IC1G) "1"? PF-202, PF-102 or
1
PH3-0/PG3-0 00LHHL PF-2D PWB-A, or
PWB-G(Dup) PB3-0/PA3-0 11 1 11
NO EP3050/EP4050 PWB-A.
(IC1G) PD3-0/PC3-0 LHHH

Change Next

1134T173CA

4) By pressing the "Change" key to NO Change SL33.

change the data from "1" to "0", does
Check the Pick-Up
SL33 operate? (Check that SL33 YES mechanism.
makes a sound.)

Check the operation of the Duplex Unit

Paper Take-Up Clutch CL31 as described
below (see T-4):
1) Make sure that the port is PA3 on
PWB-G (Dup) (IC1G).
2) Select "I/O Port Data".
3) Is the data of PA3 on PWB-G (Dup) Change PWB-G,
(IC1G) "1"? PF-202, PF-102 or
2 PH3-0/PG3-0 00LHHL PF-2D PWB-A, or
PWB-G(Dup) PB3-0/PA3-0 11 1 11
(IC1G) PD3-0/PC3-0 LHHH NO EP3050/EP4050 PWB-A.
Change Next

1134T174CA

4) By pressing the "Change" key to NO Change CL31.

change the data from "1" to "0", does
Change PWB-G,
CL31 operate? (Check that CL31
PF-202, PF-102 or
makes a sound.) YES
PF-2D PWB-A, or
EP3050/EP4050 PWB-A.
Are the Take-Up Roll, Feed Roll and Clean or change the
3 Separator Roll dirty with paper dust, worn, YES Rolls.
or deformed?

T-41
Symptom Step Check Item Result Action
• Paper is Is the Vertical Transport Drive Motor M21 Change PF-202, PF-102
at a stop rotating when a copy is taken up and fed or PF-2D PWB-A, or
in the into the copier from the Duplex Unit? NO EP3050/ EP4050
1
Vertical PWB-A.
Transport Check M21.
Section.
YES Check for overload.
Are the Vertical Transport Rollers and Clean or change the
2 Guide Plate deformed, worn, or dirty with YES Vertical Transport
paper dust? Rollers and Guide Plate.
Check the Duplex Unit Paper Take-Up
Sensor PC16 as described below (see T-3):
1) Make sure that the port is PC1 on
PWB-G (Dup) (IC1G).
2) Select "I/O Port Data".
3) Is the data of PC1 on PWB-G (Dup) Check the operation of
(IC1G) "H"? the Actuator.
PWB-G(Dup) PB3-0/PA3-0 11 1 11
(IC1G) PD3-0/PC3-0 LHHH
NO
Change Next

1134T175CA

4) Operate the Actuator with a sheet of

paper to block PC16.
5) By mounting the Duplex Unit, is the To Step 4.
Misfeed Screen displayed on the Touch
3 Panel?

Misfeed detected.
Remove misfeed at .

YES

1134T176CB

6) Select "I/O Port Data" again. Has the NO Change PC16.

data of PC1 on PWB-G (Dup) (IC1G)
Change PWB-G,
changed from "H" to "L"?
PF-202, PF-102 or
PWB-G(Dup) PB3-0/PA3-0 11 1 11
PF-2D PWB-A, or
(IC1G) PD3-0/PC3-0 LHHL YES
EP3050/EP4050 PWB-A.
Change Next

1134T177CA

T-42
Symptom Step Check Item Result Action
Check the Vertical Transport Sensor 3
PC17 as described below (see T- 3):
1) Make sure that the port is PC3 on
PWB-A (200) (IC1A) when PF-202 is
used, PC3 on PWB-A (400) (IC1A)
when PF-102 is used, or PC3 on
PWB-A (100) (IC1A) when PF-2D is
used.
2) Select "I/O Port Data".
3) Is the data of PC3 on PWB-A (200) Check the operation of
(IC1A), PC3 on PWB-A (400) (IC1A), or the Actuator.
PC3 on PWB-A (100) (IC1A) "H"?

<When PF-202 is used>

PWB-A(200) PB3-0/PA3-0 1 1 1 11
(IC1A) PD3-0/PC3-0 HLHH L

4 Change Next

1134T179CA
<When PF-102 is used> NO
PWB-A(400) PB3-0/PA3-0 1 1 1 11
(IC1A) PD3-0/PC3-0 HLHH L

Change Next

1134T178CA
<When PF-2D is used>
PWB-A(100) PB3-0/PA3-0 1
(IC1A) PD3-0/PC3-0 H

Change Next

1134T230CA
4) Operate the Actuator to block PC17.
5) Select "I/O Port Data" again. Has the NO Change PC17.
data of PC3 on PWB-A (200) (IC1A),
Change PF-202, PF-102
PC3 on PWB-A (400) (IC1A), or PC3
or PF-2D PWB-A or
on PWB-A (100) (IC1A) changed from YES
EP3050/EP4050 PWB-A.
"H" to "L"?

T-43
Symptom Step Check Item Result Action
<When PF-202 is used>
PWB-A(200) PB3-0/PA3-0 1 111111
(IC1A) PD3-0/PC3-0 LLLHLL

Change Next

<When PF-102 is used>

PWB-A(400) PB3-0/PA3-0 1 1 1 11
(IC1A) PD3-0/PC3-0 HLLH L

Change Next

1134T181CA

<When PF-2D is used>

/
PWB-A(100) PB3-0/PA3-0 1
(IC1A) PD3-0/PC3-0 L

Change Next

1134T231CA

T-44
 3 MALFUNCTIONS
The copier CPU has a function to self-diagnose the copier conditions.
On detection of a malfunction, the corresponding malfunction name, location and definition codes
are shown on the Touch Panel of the copier together with a technical representative call message.

C0 ∗∗∗
A malfunction was detected.
Malfunction definition code
Call your Technical Rep.
and provide the code: Malfunction location code
Code:C Malfunction name code
TEL :

1134T226CB
<Malfunction Resetting Procedure>
• Press the Trouble Reset Switch on the Tech. Rep. Settings Switches Board PWB-I for Exposure
Lamp failures (C04∗∗ ) and Fusing failures (C05∗ ∗).
• Swing open and close the Front Door for any other malfunctions.
• Note that for malfunctions of original size detection, the Front Door should be opened and
closed after the Power Switch is turned OFF and ON.
• Disconnect and connect the option or open and close the option door for malfunctions of options.

<Isolation Malfunction Resetting Procedure>

• Select "Machine Status" in the Tech. Rep. mode. With the malfunction code displayed, swing
open and close the Front Door.
• For malfunctions of original size detection, turn the Power Switch OFF and ON, and select
"Machine Status" in the Tech. Rep. mode. With the malfunction code displayed, swing open and
close the Front Door.
• Pictorial symbols are used to indicate the isolation malfunctions of the Sorter. Reset these
malfunctions by the following procedure:
1. Select "Tech. Rep. Choice" in the Tech. Rep. mode, and set the Sorter function to "Disable
Copy".
2. Turn the Power Switch OFF and ON to call on the screen the malfunction code corresponding
to the pictorial symbol.
3. Do troubleshooting and turn the Power Switch OFF and ON.

1. Detection Timing ∗ : Applies to isolation malfunctions

Code Description Detection Timing
C0000 Main Drive Motor M1’s The Main Drive Motor Lock signal remains HIGH for a
failure to turn continuous 1.5-second period 1 second after M1 has been
energized.
ON
M1 OFF
Main Drive Motor H
Lock signal L
1sec 1.5sec
1134T39TCA
Drive

C0010 Main Drive Motor M1 The Main Drive Motor Lock signal remains LOW for a
turning at abnormal continuous 1.5-second period 1 second after M1 has been
timing deenergized.
ON
M1 OFF
Main Drive Motor H
Lock signal L
1sec 1.5sec
1134T40TCA

T-45
 Code Description Detection Timing
C0040 Suction Fan Motor M4’s The Suction Fan Motor Lock signal remains HIGH for a
failure to turn continuous 1.5-second period 1 second after M4 has
been energized.

ON
M4 OFF
Suction Fan Motor H
Lock Signal L

1sec 1.5sec 1136T47TCA

C004A Original Glass Cooling The Original Glass Cooling Fan Motor Lock signal
Fan Motor M5’s failure remains HIGH for a continuous 1.5-second period 1
to turn second after M5 has been energized.

ON
M5 OFF
Original Glass Cooling H
Fan Motor Lock Signal L

1sec 1.5sec 1136T48TCA

C004b Original Glass Cooling The Original Glass Cooling Fan Motor Lock signal
Fan Motor M5 turning at remains LOW for a continuous 1.5-second period 10
abnormal timing seconds after M5 has been deenergized.
Drive

ON
M5 OFF
Original Glass Cooling H
Fan Motor Lock Signal L

10sec 1.5sec 1134T52TCA

C004c Exhaust Fan Motor M3’s The Exhaust Fan Motor Lock signal remains HIGH for a
failure to turn continuous 1.5-second period 1 second after M3 has
been energized.

ON
M3 OFF
Exhaust Fan Motor H
Lock signal L
1sec 1.5sec
1134T41TCA

C004d Exhaust Fan Motor M3 The Exhaust Fan Motor Lock signal remains LOW for a
turning at abnormal continuous 1.5-second period 10 seconds after M3 has
timing been deenergized.

ON
M3 OFF
Exhaust Fan Motor H
Lock signal L
10sec 1.5sec
1134T42TCA

T-46
 Code Description Detection Timing
C0070 Main Hopper Toner The output from Toner Bottle Home Position Sensor
Replenishing Motor PC35 does not go HIGH within 5 seconds after M8 has
M8’s failure to turn been energized.

ON
M8 OFF
H 5sec
PC35 L

1136T18TAA

The output from PC35 does not go LOW within 10

seconds after it has gone HIGH following the energization
of M8.

ON
M8 OFF
10sec
H
PC35 L

1136T19TAA

C0071 Main Hopper Toner The PC35 output is HIGH 2 seconds after M8 has been
Replenishing Motor M8 deenergized.
turning at abnormal
Drive

timing
ON
M8 OFF
2sec
H
PC35 L

1136T20TAA

C0072 Sub Hopper Toner When the current toner-to-carrier ratio is 2% lower than
Replenishing Motor the SCH-90 setting and the Add Toner Indicator is not lit
M9’s failure to turn on the control panel, a toner replenishing sequence is
carried out (M9 is turned); the toner-to-carrier ratio does
not increase by 1% within 140 seconds or by 2% within
220 seconds.
C0100 Charge Corona Wire • The following specified rotational pulses have not been
winding failure counted during winding.
Periodic winding: 16 pulses
One-shot winding: 5 pulses
• It took 2 sec. or longer to detect one pulse.
C0200 PC Drum Charge, Image The Short Circuit Detection signal (SCD) remains LOW
Transfer/Paper Separator Coronas

Transfer/Paper for a continuous 600-msec. period while the PC Drum

PC Drum Charge, Image

Separator Coronas Charge Corona or Image Transfer/Paper Separator

malfunction Coronas remain ON.

PC Drum Charge, Image ON

ransfer/Paper Separator Coronas OFF
SCD H 600msec
L

1136T50TCA

T-47
 The copier performs a self-diagnostic sequence to determine if the
microprocessor outputs a signal to each of the IC ports on Master Board
PWB-A properly. It is intended to detect the following malfunctions (C03∗∗).
If the microprocessor fails to output any of these signals or if any of the
electronic components on the board (driver IC, etc.) is faulty, the copier
determines that there is a faulty condition existing and shows the
corresponding malfunction code on the Touch Panel.

Note that C0370 (data for serial communication) is used to determine whether
the output signal from the Master Board is transmitted to PWB-F and is sent
back correctly. C0374 (data for serial communication) is used to determine
whether the output signal from the Master Board is transmitted to PWB-A of
the C-301 and is sent back correctly.

Port on
Description (Input or
Code Master Detection Timing
output signal fault)
Board
The HIGH signal • When the "Board Check" of "I/O Check" in the
required to start the Tech. Rep. Mode is executed.
C0300 IC1A P85
diagnostic sequence of
each port is not input.
C0311 AVR PWM IC1A P50
• When the "Board Check" of "I/O Check" in the
C0312 H1 REM IC1A P51 Tech. Rep. Mode is executed.
• When a malfunction occurs.
C0313 Grid PWM IC1A P56 • When the "Board Check" of "I/O Check" in the
Tech. Rep. Mode is executed.
C0314 PWB-H PWM IC1AP60
C0315 SL4 UP IC5A APC1
C0316 SL4 DOWN IC5A APC0
C0317 LA2 DATA IC1A P64
C0318 LA2 MODE IC1A P65
C0319 LA2 CLK IC1A P66
C031A LA2 STROBE IC1A P67
C031B M8 REM IC4A APA3 • When the "Board Check" of "I/O Check" in the
Tech. Rep. Mode is executed.
C031C M9 REM IC4A APA2 • When a malfunction occurs.

C031D AVR REM IC4A APA1 • When the "Board Check" of "I/O Check" in the
Tech. Rep. Mode is executed.
C031E SCAN IC4A APA0 • When a malfunction occurs.

• When the "Board Check" of "I/O Check" in the

C031F SL1 REM IC4A APC6
Tech. Rep. Mode is executed.
• When the "Board Check" of "I/O Check" in the
C0320 M4 Switching IC4A APC5 Tech. Rep. Mode is executed.
• When a malfunction occurs.

T-48
 Description (Input or Port on
Code Detection Timing
output signal fault) Master Board
C0321 SL5 IC4A BPA7 • When the "Board Check" of "I/O Check" in
the Tech. Rep. Mode is executed.
C0322 Separator/Bias REM IC4A BPA6
PC Drum Charge/Image
C0323 IC4A BPA5
Transfer REM
C0324 CL1 IC4A BPA4
C0325 CL2 IC4A BPA3
C0326 CL3 IC4A BPA2
• When the "Board Check" of "I/O Check" in
C0329 M1 REM IC5A BPC7 the Tech. Rep. Mode is executed.
• When a malfunction occurs.
C032A Vendor (in copy cycle) IC5A BPA7 • When the "Board Check" of "I/O Check" in
the Tech. Rep. Mode is executed.
C032B Vendor (size) IC5A BPA6
C032C UN2 Area 1 IC5A BPA5
C032D UN2 Area 2 IC5A BPA4
C032E ENABLE IC5A BPA2
C032F Seal Bias REM IC5A BPA1
C0331 RY3 REM IC5A BPC5
C0332 M5 REM IC5A BPC4 • When the "Board Check" of "I/O Check" in
the Tech. Rep. Mode is executed.
C0333 LA 3 IC5A APC3
• When a malfunction occurs.
C0334 M3 REM IC4A APC3
C0335 M10 REM IC4A APC7
∗ C0350 Output Data for Serial
IC3A S10/S00
• When the "Board Check" of "I/O Check" in
Communication (PWB-F) the Tech. Rep. Mode is executed.
• When a malfunction occurs.
∗ C0351 Output Data for Serial
Communication IC3A S11/S01
(PF-202, PF-102)
∗ C0352 Output Data for Serial
Communication IC3A S12/S02
(PF-202, PF-102)
∗ C0353 Output Data for Serial
Communication (AD-5, IC3A S13/S03
storage drawer)
∗ C0354 Output Data for Serial
IC3A S14/S04
Communication (C-301)
∗ C0370 Input Data for Serial
IC3A S10/S00
Communication (PWB-F)
∗ C0374 Input Data for Serial
IC3A S14/S04
Communication (C-301)

T-49
 Code Description Detection Timing
C0400 Exposure Lamp LA1’s The output from AE Sensor Board PWB-H has not
failure to turn ON become 4.0 V or less for the period between when LA1
turns ON and the Scanner starts a scan motion and when
the Image Leading Edge signal (BASE) turns ON (goes
LOW).
ON
LA1 OFF
H
BASE L

PWB-H 4.0V

1136T22TAA

C0410 Exposure Lamp LA1 The output from PWB-H remains 4.0 V or less for a
turning ON at abnormal continuous 3-second period at any timing while the output
timing from Scanner Reference Position Sensor PC81 remains
Exposure Lamp

LOW.

H
PC81 L

4 .0V 3.0sec
PWB-H
1136T23TAA

The output from PWB-H remains 4.0 V or less for a

continuous 3-second period while the output from Size
Reset Switch S108 remains LOW (i.e., while the Original
Cover remains closed).

H
S108 L

4 .0V 3.0sec
PWB-H
1136T24TAA

C0500 Warming-up failure • When Power Switch S1 or Front Door Interlock Switch
S21 is ON, the surface temperature of the Upper Fusing
Roller:
(Less than 165°C)
* Does not reach 100°C within 180 seconds.
* Does not reach 150°C within 60 seconds after it has
reached 100°C.
* Does not reach 175°C within 60 seconds after it has
Fusing Unit

reached 150°C.
* Does not reach 200°C within 240 seconds after it has
reached 150°C.
(165°C or more)
* Does not reach 200°C within 60 seconds.
• After the copier has left the Energy Saver mode:
* Does not reach 200°C within 120 seconds.

C0510 Abnormally low fusing The surface temperature of the Upper Fusing Roller
temperature remains 130°C or less for a continuous 5-second period
after the copier has warmed up.

T-50
 Code Description Detection Timing
C0520 Abnormally high fusing The surface temperature of the Upper Fusing Roller
temperature remains 230°C or more for a continuous 5-second period
after the copier has warmed up.
C0522 Fusing Front/Rear The voltages from TH1 and TH2 remain 0.165 V or less
Thermistor TH1/2 for a continuous 1-second period after the copier has
malfunction warmed up.
C0600 Scanner Motor M2 Where no encoder pulses are input to SCP Board PWB-J
malfunction for 100 to 130 msec. while M2 is turning, the
Forward/Backward Rotation signal from PWB-J does not
go from LOW to HIGH, or vice versa, when an attempt is
made to turn M2 backward.
ON
M2 OFF

Encoder Pulse

100 to 130msec
Forward H
Rotation Signal L
Backward H
Rotation Signal L
1136T51TCA
Optical Section (Scanner)

C0601 SCP Board PWB-J Where no encoder pulses are input to SCP Board PWB-J
malfunction for 100 to 130 msec. while M2 is turning, the
Forward/Backward Rotation signal from PWB-J goes from
LOW to HIGH, or vice versa, when an attempt is made to
turn M2 backward.

ON
M2 OFF

Encoder Pulse

100 to 130msec
Forward H
Rotation Signal L
Backward H
Rotation Signal L
1136T52TCA

C0650 Scanner Reference <At the start of the Scanner’s scan motion>
Position Sensor PC81 PC81 is not unblocked H even after the lapse of a
malfunction given period of time.
<At the end of the Scanner’s return motion>
PC81 is not blocked L even after the lapse of a given
period of time.

C0660 Scanner load failure The M2 speed control does not change from the
Acceleration to Constant Speed control for the period
between when the SHOME signal goes LOW and when a
LOW TRON signal is detected.

Acceleration
Constant Speed

M2
1136T53TCA

T-51
 Code Description Detection Timing
C06F0 SHOME signal failure <During prescan>
When the Scanner is at a position other than home, the
SHOME signal does not go LOW even after the lapse
of 5 seconds after S1 has been turned ON.
The SHOME signal does not go LOW even after the
lapse of 5 seconds after the SCEND signal has gone
from LOW to HIGH.
<During a copy cycle>
When the Scanner is at a position other than home, the
SHOME signal does not go LOW even after the lapse
of 7 seconds after the SCAN signal has gone LOW.
The SHOME signal does not go LOW even after the
lapse of 5 seconds after the SCEND signal has gone
from LOW to HIGH.
C06F1 SHOME signal failure The SHOME signal does not go HIGH even after the
lapse of 7 seconds after it has gone LOW.
C06F2 BASE signal failure The BASE signal does not go LOW even after the lapse
of 5 seconds after the SHOME signal has gone HIGH.
Optical Section (Scanner)

C06F3 BASE signal failure <During prescan>

The BASE signal does not go HIGH even after the
lapse of 5 seconds after the TRON signal has gone
LOW.
C06F4 TRON signal failure <During prescan>
The TRON signal does not go LOW even after the
lapse of 5 seconds after the BASE signal has gone
LOW.
<During a copy cycle>
The TRON signal does not go LOW even after the
lapse of 5 seconds after the SHOME signal has gone
HIGH.
C06F5 TRON signal failure <During prescan>
The TRON signal does not go HIGH even after the
lapse of 5 seconds after the BASE signal has gone
HIGH.
C06F6 SCEND signal failure <During prescan>
The SCEND signal does not go LOW even after the
lapse of 5 seconds after the TRON signal has gone
HIGH.
<During a copy cycle>
The SCEND signal does not go LOW even after the
lapse of 5 seconds after the SHOME signal has gone
HIGH.
C06F7 SCEND signal failure The SCEND signal does not go HIGH even after the lapse
of 5 seconds after it has gone LOW.

T-52
 Code Description Detection Timing
C0610 Lens motion failure The output from Lens Reference Position Sensor PC90
does not go from HIGH to LOW, or vice versa, even after
the lapse of a given period of time after Lens Motor M6
Optical Section (Lens)

has been energized.

C0620 4th/5th Mirrors motion The output from Mirror Reference Position Sensor PC86
failure does not go from HIGH to LOW, or vice versa, even after
the lapse of a given period of time after Mirror Motor M7
Optical Section (Mirror)

has been energized.

T-53
 Code Description Detection Timing
C0910 2nd Drawer Paper The 2nd Drawer Paper Lift-Up Sensor PC66 is not
∗ Lift-Up failure blocked (L) 5 sec. after the 2nd Drawer Paper Lift-Up
Motor M14 has started rotating forward.
The 2nd Drawer Paper Lift-Up Motor Pulse Sensor
PC68 detected 75 pulses edges after M14 had started
rotating forward.

Forward rotation
M14 Stop
5sec
H
PC66 L

75 pulses
Paper Take-Up Section

PC68
1134T43TCB

C0911 2nd Drawer Paper The 2nd Drawer Paper Lift-Up Sensor PC66 is not
(Inch Lower-Down failure unblocked (H) though the 2nd Drawer paper Lift-Up Motor
Area) Pulse Sensor PC68 detected 10 pulses edges after M14
∗ had started rotating backward.

M14 Stop
Backward rotation

10 pulses

PC68

H
PC66 L
1134T44TCB

T-54
 Code Description Detection Timing
C0912 2nd Drawer Paper <Lower-down failure>
(Inch Lower-Down failure The 2nd Drawer Lowered Position Sensor PC70 is not
Area) blocked (L) 5 sec. after the 2nd Drawer Paper Lift-Up
∗ 2nd Drawer Lock failure Motor M14 has started rotating backward.
PC70 is not blocked (L) though the 2nd Drawer Paper
Lift-Up Motor Pulse Sensor PC68 detected 75 pulses
after M14 had started rotating backward.

M14 Stop
Backward rotation
5sec
H
PC70 L

75 pulses

PC68
Paper Take-Up Section

1134T45TCB

<Lock failure>
The 2nd Drawer Lowered Position Sensor PC70 is not
blocked (L) 2 sec. after the 2nd Drawer Paper Lift-Up
Motor M14 has started rotating forward.

Forward rotation
M14 Stop
2sec
H
PC70 L
1134T46TCA

C0913 2nd Drawer Lock failure With the 2nd Drawer Lowered Position Sensor PC70
(Inch blocked (L), PC70 is not unblocked (H) 2 sec. after the
Area) 2nd Drawer Paper Lift-Up Motor M14 has started rotating
∗ forward.
Forward rotation
M14 Stop
2sec

H
PC70 L
1134T47TCA

T-55
 Code Description Detection Timing
C0914 2nd Drawer Paper The 2nd Drawer Paper Lift-Up Motor Pulse Sensor
∗ Lift-Up Motor M14’s PC68 detects no pulses 500 msec. after M14 had
failure to turn been energized.
The 2nd Drawer Paper Lift-Up Motor Pulse Sensor
PC68 detects no pulses for 200 msec. while M14 was
being energized.
ON
M14 OFF
500msec 200msec
H
PC68 L
1134T31TAA

C0916 2nd Drawer lock release The 2nd Drawer is not pushed out 2 sec. after the 2nd
(Inch failure Drawer Lowered Position Sensor C70 has been blocked
Paper Take-Up Section

Area) (L) during lowering motion.

∗
C0920 1st Drawer Paper Lift-Up The 1st Drawer Paper Lift-Up Sensor PC65 is not
∗ failure blocked (L) 5 sec. after the 1st Drawer Paper Lift-Up
Motor M13 has been energized.
The 1st Drawer Paper Lift-Up Motor Pulse Sensor
PC67 detects 75 pulses after M13 has been energized.

ON
M13 OFF
5sec
H
PC65 L
75 pulses

PC67

1134T48TCB

T-56
 Code Description Detection Timing
C0921 1st Drawer Paper The 1st Drawer Paper Lift-Up Sensor PC65 is not
(Inch Lower-Down failure unblocked (H) though the 1st Drawer Paper Lift-Up Motor
Area) Pulse Sensor PC67 detected 10 pulses after M13 had
∗ started rotating backward.

M14 Stop
Backward rotation

10 pulses

PC67

H
PC65 L
1134T49TCB

C0922 1st Drawer Paper <Lower-down failure>

(Inch Lower-Down failure The 1st Drawer Lowered Position Sensor PC69 is not
Area) blocked (L) 5 sec. after the 1st Drawer Paper Lift-Up
∗ 1st Drawer Lock failure Motor M13 has started rotating backward.
Paper Take-Up Section

PC69 is not blocked (L) though the 1st Drawer Paper

Lift-Up Motor Pulse Sensor PC67 detected 75 pulses
after M13 had started rotating backward.

M13 Stop
Backward rotation
5sec
H
PC69 L

75 pulses

PC67 1134T50TCB

<Lock failure>
The 1st Drawer Lowered Position Sensor PC69 is not
blocked (L) 2 sec. after the 1st Drawer Paper Lift-Up
Motor M13 has started rotating forward.

Forward rotation
M13 Stop
2sec
H
PC69 L
1134T51TCA

T-57
 Code Description Detection Timing
C0923 1st Drawer lock failure With the 1st Drawer Lowered Position Sensor PC69
(Inch blocked (L), PC69 is not unblocked (H) 2 sec. after the 1st
Area) Drawer Paper Lift-Up Motor M13 has started rotating
∗ forward.
Forward rotation
M13 Stop
2sec

H
PC69 L
1134T52TCA
Paper Take-Up Section

C0924 1st Drawer Paper Lift-Up The 1st Drawer Paper Lift-Up Motor Pulse Sensor PC67
∗ Motor M13’s failure to detects no pulses 500 msec. after M13 has been
turn energized.
The 1st Drawer Paper Lift-Up Motor Pulse Sensor PC67
detects no pulses for 200 msec. while M13 is being
energized.
ON
M13 OFF
500msec 200msec
H
PC67 L
1134T53TCA

C0926 1st Drawer lock release The 1st Drawer is not pushed out 2 sec. after the 1st
(Inch failure Drawer Lowered Position Sensor PC69 has been blocked
Area) (L) during lowering motion.
∗

T-58
 Code Description Detection Timing
C0E00 Main Erase Lamp LA3’s The LA3 Malfunction signal remains HIGH for a
failure to turn ON continuous 1-second period while LA3 remains ON.

ON
LA3 OFF
1.0sec
LA3 Malfunction H
Signal L
1136T54TCA
Erase Lamps

C0E01 Main Erase Lamp LA3 The LA3 Malfunction signal remains LOW for a
turning ON at abnormal continuous 1-second period while LA3 remains OFF.
timing
ON
LA3 OFF
1.0sec
LA3 Malfunction H
Signal L
1136T55TCA

C0E20 Image Erase Lamp The LA2 gate array is defective according to the
LA2’s failure to turn ON self-diagnoses made immediately after Main Drive Motor
M1 has been deenergized.
C0F02 Original Size Detecting In F7 test operation:
∗ Board UN2 malfunction 1) The Busy signal does not go LOW within approx. 800
msec. after the Initial signal has gone LOW, or
undefined data is input to the master CPU.
2) If step 1 above is checked okay, the Busy signal goes
HIGH within approx. 200 msec.
3) If both steps 1 and 2 above are checked okay, the
Busy signal does not go HIGH within approx. 4,000
msec.
4) If steps 1, 2, and 3 above are checked okay,
undefined data is input to master CPU within approx.
500 msec.

H
Sensors

Initial Signal L

Busy Signal

1) 2) 3) 4)
800msec 200msec 400msec 500msec
1136T56TCA

Under normal conditions:

1) The Busy signal remains HIGH or LOW for approx.
3,000 msec. or more.
2) Undefined data is input to master CPU.

Busy Signal

70msec 70msec 3000msec

70msec 70msec
1136T57TCA

T-59
 Code Description Detection Timing
C0F02 Original Size Detecting When S1 is turned ON:
∗ Board UN2 malfunction 1) The Busy signal remains HIGH or LOW for approx.
5,000 msec. or more.
2) Undefined data is input to master CPU.
Sensors

5000msec.
H
Busy Signal L
H
Busy Signal L
1136T60TCA

T-60
 Code Description Detection Timing and Sensor Layout
C0FE1 Original Size Detecting <Detection Timing>
Sensor ➊ failure After having read the output data from PC115 to
PC119, UN2 determines that there is a failure.
C0FE2 Original Size Detecting
Sensor ➋ failure
<Sensor Layout>
C0FE3 Original Size Detecting (Metric Areas)
Sensors ➊ and ➋ failure ➊: PC116, ➋: PC117, ➌: PC118 (option),
C0FE4 Original Size Detecting ➍: PC115, ➎: PC119 (option)
Sensor ➌ failure ∗ PC118 and PC119 are standard for Hong Kong
area.
C0FE5 Original Size Detecting A to E: Sensor locations
Sensors ➊ and ➌ failure
C0FE6 Original Size Detecting ➊
A ➋ ➌
Original Size Detecting Board ∗

Sensors ➋ and ➌ failure

B C D E
C0FE7 Original Size Detecting
Sensors ➊, ➋, and ➌ failure
C0FE8 Original Size Detecting
A
Sensor ➍ failure
B ➍
C0FE9 Original Size Detecting
Sensors ➊ and ➍ failure
➎
C0FEA Original Size Detecting
Sensors ➋ and ➍ failure (Inch Areas)
➊: PC116 (option), ➋: PC117,
C0FEB Original Size Detecting
➌: PC118 (option), ➍: PC115
Sensors ➊, ➋, and ➍ failure
C0FEC Original Size Detecting
A
➊
Sensors ➌and ➍ failure ➋ ➌
C0FED Original Size Detecting B D
C E
Sensors ➊, ➌, and ➍ failure
C0FEE Original Size Detecting
Sensors ➋, ➌, and ➍ failure
A
C0FEF Original Size Detecting
Sensors ➊, ➋, ➌, and ➍ ➍
failure

T-61
 Code Description Sensor Layout
C0FF0 Original Size Detecting
Sensor ➎ failure
C0FF1 Original Size Detecting
(Metric Areas)
Sensors ➊ and ➎ failure
➊: PC116, ➋: PC117, ➌: PC118 (option),
C0FF2 Original Size Detecting ➍: PC115, ➎: PC119 (option)
Sensors ➋ and ➎ failure ∗ PC118 and PC119 are atandard for Hong Kong
area.
C0FF3 Original Size Detecting
A to E: Sensor locations
Sensors ➊, ➋, and ➎ failure
C0FF4 Original Size Detecting ➊
Sensors ➌ and ➎ failure A
➋ ➌
C0FF5 Original Size Detecting B C D E
Sensors ➊, ➌, and ➎ failure
C0FF6 Original Size Detecting
Sensors ➋, ➌, and ➎ failure A
Original Size Detecting Board ∗

C0FF7 Original Size Detecting B ➍

Sensors ➊, ➋, ➌, and ➎
failure ➎
C0FF8 Original Size Detecting
Sensors ➍ and ➎ failure
C0FF9 Original Size Detecting
Sensors ➊, ➍, and ➎ failure
(Inch Areas)
C0FFA Original Size Detecting ➊: PC116 (option), ➋: PC117,
Sensors ➋, ➍, and ➎ failure ➌: PC118 (option), ➍: PC115
C0FFB Original Size Detecting
Sensors ➊, ➋, ➍, and ➎
failure
A ➊
C0FFC Original Size Detecting ➋ ➌
Sensors ➌, ➍, and ➎ failure B D E
C
C0FFD Original Size Detecting
Sensors ➊, ➌, ➍, and ➎
failure
A
C0FFE Original Size Detecting
➍
Sensors ➋, ➌, ➍, and ➎
failure
C0FFF Original Size Detecting
Sensors ➊, ➋, ➌, ➍, and
➎ failure (Metric Areas)

T-62
 Code Description Detection Timing
C0F10 AE Sensor Board PWB-H <In normal conditions>
malfunction The output from PWB-H remains approx. 0.18
V or less for a continuous 2-second period
when LA1 is OFF, PC81 output is LOW, or
S108 output is LOW (i.e., the Original Cover
is closed).
<In F5 or FF test operation>
The output from PWB-H is less than 1.8 V
when 100% of PWB-H is illuminated.
The output from PWB-H is 1.8 V or more
when PWB-H is not illuminated.
The output from PWB-H is outside the target
range (1.8 ±0.05 V) when 50% of PWB-H is
illuminated.
<When the optimum LA1 voltage is changed after
the intensity of LA1 light has been corrected>
The output from PWB-H when 100% of
PWB-H is illuminated is smaller than that for
halftones stored in the F5 test operation.
The output from PWB-H when PWB-H is not
illuminated is smaller than that for halftones
stored in the F5 test operation.
The output from PWB-H when 50% of PWB-H
is illuminated is outside the range ( ±0.05 V)
of output for halftones stored in the F5 test
operation.
Sensors

C0F20 AIDC Sensor UN3 variation <At 1st F5 or FF test operation>

∗ correction failure The UN3 output is 0.95 V or more when all
signals from the 4-bit analog switch are made
LOW (i.e., with a maximum load resistance).
The UN3 output is less than 1.05 V when all
signals from the 4-bit analog switch are made
HIGH (i.e., with a minimum load resistance).
C0F21 AIDC Sensor UN3 contamination <In F5 or FF test operation>
∗ correction failure The AIDC Sensor output does not fall in the
range between 1 V and less than 1.2 V when
the intensity of the sensor LED is varied.
C0F22 AIDC Sensor UN3 VG correction <At the 1st F5 or FF test operation>
∗ failure 1) The grid voltage (VG) of 550 V (reference) is
output.
2) A solid black pattern is produced.
3) If the AIDC Sensor output is less than 4.2 V
at this time:
The grid voltage does not become 4.2 V or
more even when it is increased 3 steps (90 V).
C0F23 AIDC Sensor UN3 exposure <At the 1st F5 or FF test operation>
∗ correction failure 1) LA1 is turned ON with 58 V (reference).
2) A halftone pattern is produced.
3) The LA1 output is varied so that the AIDC
Sensor output falls within the target range.
4) The AIDC Sensor output does not fall within
the target range even after steps 1 to 3 have
been repeated eight times, the output value
being outside the error level.

T-63
 Code Description Detection Timing
C0F30 ATDC Sensor UN4 failure The UN4 output remains approx. 0.18 V or less
∗ or 4.52 V or more for a continuous 3-second
period while M1 remains energized.
Sensors

C0F31 ATDC Sensor UN4 failure When the value shown for "Set" of "ATDC
Level" of "Level History" is greatly different
from the value set in the FF test operation.
In the FF mode, the output of the ATDC Sensor
(UN4) did not fall within the range 4.45V to
11.05V.
C0900 3rd Drawer Lift-Up Sensor
malfunction
C0904 3rd Drawer Lift-Up Motor’s failure
PF-202 ∗

to turn See PF-202 Service Manual

(Metric Area).
C0950 4th Drawer Lift-Up Sensor
malfunction
C0954 4th Drawer Lift-Up Motor’s failure
to turn
C0d00 Duplex Unit Front/Rear Edge
Guide Plates home position
detection failure
PF-2D/AD-5 ∗

C0d20 Duplex Unit Trailing Gate Unit

home position detection failure See PF-2D/AD-5 Service Manual.

C0d50 Duplex Unit Drive Motor’s failure

to turn
C0d51 Duplex Unit Drive Motor turning
at abnormal timing
C0990 Main Tray upward motion failure
C0991 Main Tray downward motion
failure
C0992 Main Tray downward motion
failure
C0993 Main Tray upward motion failure
C0994 Main Tray Elevator Motor’s
failure to turn
C0996 3rd Drawer lock release failure
PF-102 ∗

See PF-102 Service Manual.

C0998 Shifter transfer failure
C0999 Shifter return failure
C099A Shifter return failure
C099b Shifter transfer failure
C099c Shift Motor’s failure to turn
C0F79 3rd Drawer Paper Empty
Sensor failure
Main Tray Paper Empty Board
failure
Shift Tray Paper Empty Sensor

T-64
 Code Description Detection Timing
C09C0 Elevator ascent failure
C-301 ∗ Refer to the C-301 Service Manual.
C09C2 Elevator descent failure
ST-206/ C0b00
Transport drive malfunction See ST-206/S-205 Service Manual.
S-205 C0b01
∗C0b60
ST-101/
S-104 ∗C0b61
See ST-206/S-205 and ST-101/S-104
Bin motion failure
∗C0b62 Service Manuals.
ST-206/
S-205 ∗C0b63
∗C0b64

ST-101 ∗C0b10 See ST-206/S-205 and ST-101/S-104

ST-206 ∗C0b11 Service Manuals.
Paper Clamp Unit motion failure
∗C0b12
ST-206 See ST-206/S-205 Service Manual.
∗C0b13
∗C0b30 Paper Aligning Mechanism drive
C0b31 failure
ST-101 See ST-206/S-205 and ST-101/S-104
ST-206 C0b50 Service Manuals.
∗C0b51 Stapling failure
C0b52
∗C0b70
ST-206 Hole punching failure See ST-206/S-205 Service Manual.
∗C0b71

T-65
2. Troubleshooting Procedures

2-1. C0000: Main Drive Motor M1’s Failure to Turn

C0010: Main Drive Motor M1 Turning at Abnormal Timing

Symbol Name
M1 Main Drive Motor
PWB-A Master Board

1136T012AA

1134C07TAA

T-66
Step Check Item Result Action
Do as described below to check whether M1
rotates or not when the Start Key is turned
ON (see T-4):
1) Make sure that the port is BPC7 on
PWB-A (IC5A).
2) Select "I/O Port Data".
3) Is the data of BPC7 on PWB-A (IC5A) Change PWB-A.
1
"1"?

IC Port Data 3/8 BackUp Menu

NO
IC Port 7 6 5 4/3 2 1 0
PWB-A BPC7-0 1 1 1 1
(IC5A) 3-0
PWB-F PB3-0/PA3-0 1 1 1 1 1 1 1 1
1134T247CA
(IC1F) PD3-0/PC3-0 H H L L L H

4) By pressing the "Change" key to change To Step 3.

YES
the data from "1" to "0", does M1 rotate?
Do as described below to check the input
signal (Main Drive Motor Lock signal) when
M1 is at a stop (see T-4):
1) Make sure that the port is APB1 on
PWB-A (IC5A).
2) Select "I/O Port Data".
3) Is the data of APB1 on PWB-A (IC5A) Change PWB-A.
2 YES
"H"?

IC Port Data 2/8 BackUp Menu Change M1.

IC Port 7 6 5 4/3 2 1 0
PWB-A BPB7-0 L H H H H H H H
(IC4A) BPC7-0 H L L L H H H H
3-0
NO
PWB-A APA7-0 L L L L
(IC5A) APB7-0 H H H L H L H L
PH3-0/PG3-0 0 0 H H H L
PWB-A(200) PB3-0/PA3-0 1 1134T183CB
1 1 1 1 1 1
( ) /

Does M1 rotate with unusual sound? Check the roller, gears, belt, etc.
3 YES
for overload.

T-67
2-2. C0040: Suction Fan Motor M4’s Failure to Turn
C004A: Original Glass Cooling Fan Motor M5’s Failure to Turn
C004b: Original Glass Cooling Fan Motor M5 Turning at Abnormal
Timing
C004c: Exhaust Fan Motor M3’s Failure to Turn
C004d: Exhaust Fan Motor M3 Turning at Abnormal Timing

Symbol Name
M3 Exhaust Fan Motor
M5
M4 Suction Fan Motor
M5 Original Glass Cooling Fan
M4 Motor
PWB-A Master Board
M3

PWB-A

1134T113AA

1134C09TCA

T-68
∗ C0040

Step Check Item Result Action

Do as described below to check the input signal
(Suction Fan Motor Lock signal) (see T-4):
1) Make sure that the port is BPB1 on PWB-A
(IC4A).
2) Select "I/O Port Data".
1 3) Is the data of BPB1 on PWB-A (IC4A) "L"? YES Change PWB-A.
IC Port Data 2/8 BackUp Menu Change M4.
IC Port 7 6 5 4/3 2 1 0
PWB-A BPB7-0 L H H HH H L H NO
(IC4A) BPC7-0 H L L L H H H H
3-0
APA7-0 H H L L L H
1134T184CA
APB7 0 H H 1 1 H H 0 0

T-69
 1134C35TCA

T-70
∗ C004A, C004b
Step Check Item Result Action
1 Is C004A being shown? NO To Step 5.
Do as described below to check whether M5 rotates. (see
T-4, 5):
1) Make sure that the port is BPC4 on PWB-A (IC5A).
2) Select "I/O Port Data".
3) By pressing the "Change" key to change the data from
"1" to "0", does M5 rotate?
2
IC Port Data 3/8 BackUp Menu

IC Port 7 6 5 4/3 2 1 0 NO To Step 4.

PWB-A BPC7-0 1 1 1 0
(IC5A) 3-0
APA7-0
1134T256CA
APB7-0 H H L L L H
PH3 0/PG3 0 H H 1 1 H H 0 0
Do as described below to check the input signal (Original
Glass Cooling Fan Motor Look signal). (see T-3):
1) Make sure that the port is BPB2 on PWB-A (IC4A).
2) Select "I/O Port Data".
3) Is the data of BPB2 on PWB-A (IC4A) "L"? YES Change PWB-A.
3 IC Port Data 2/8 BackUp Menu

IC Port 7 6 5 4/3 2 1 0
PWB-A BPB7-0 LHHHHLLH NO Change M5.
(IC4A) BPC7-0 HLLLHHHH
3-0
APA7-0 HHLLLH
1134T260CA
APB7-0 HH11HH00
By making a "Board Check" via "I/O Check" in the Tech YES Change PWB-A.
4
Rep. mode, is the malfunction code "C0300" displayed? NO Change M5.
Do as decribed below to check the input signal (Original
Glass Cooling Fan Motor Remote signal). (see T-4):
1) Make sure that the port is BPC4 on PWB-A (IC5A).
2) Select "I/O Port Data".
3) Is the data of BPC4 on PWB-A (IC5A) "1"?
5 IC Port Data 3/8 BackUp Menu

IC Port 7 6 5 4/3 2 1 0
1111
NO Change PWB-A.
PWB-A BPC7-0
(IC5A) 3-0

1134T185CA
APA7-0 HHLLLH
APB7 0 HH11HH00
Do as described below to check the input signal (Original
Glass Cooling Fan Motor Lock signal). (see T-3):
1) Make sure that the port is BPB2 on PWB-A (IC4A).
2) Select "I/O Port Data".
3) Is the data of BPB2 on PWB-A (IC4A) "H"? YES Change PWB-A.
6 IC Port Data BackUp Menu
2/8
IC Port 7 6 5 4/3 2 1 0
PWB-A BPB7-0 L H H HH H L H NO Change M5.
(IC4A) BPC7-0 H L L L H H H H
3-0
APA7-0 H H L L L H
1134T186CA

T-71
 1134C01TAA

T-72
∗ C004C, C004d
Step Check Item Result Action
1 Is C004C being shown? NO To Step 5.
Do as described below to check whether M3 rotates. (see
T-4, 5):
1) Make sure that the port is APC4 on PWB-A (IC4A).
2) Select "I/O Port Data".
3) By pressing the "Change" key to change the data from
"1" to "0", does M3 rotate?
2 PWB-A APA7-0 11111111
(IC4A) APB7-0 H LHHHL
APC7-0 100LH H
NO To Step 4.
BPA7-0 111111

Change Next

1134T258CA

Do as described below to check the input signal (Original

Glass Cooling Fan Motor Lock signal). (see T-3):
1) Make sure that the port is BPB3 on PWB-A (IC4A).
2) Select "I/O Port Data".
3) Is the data of BPB3 on PWB-A (IC4A) "L"? YES Change PWB-A.
3 IC Port Data 2/8 BackUp Menu

IC Port 7 6 5 4/3 2 1 0
PWB-A BPB7-0 L H H HL H L H NO Change M3.
(IC4A) BPC7-0 H L L LH H H H
3-0
APA7-0 H H L L L H
1134T261CA
APB7-0 H H 1 1 H H 0 0
By making a "Board Check" via "I/O Check" in the Tech YES Change PWB-A.
4
Rep. mode, is the malfunction code "C0300" displayed? NO Change M3.
Do as described below to check the input signal (Original
Glass Cooling Fan Motor Remote signal). (see T-4):
1) Make sure that the port is APC4 on PWB-A (IC4A).
2) Select "I/O Port Data".
3) Is the data of APC4 on PWB-A (IC4A) "1"?
(IC1 ) PD3-0/PC3-0 L H
5 PWB-A APA7-0 1 1 1 1 1 1 1 1
(IC4A) APB7-0 H L H H H L
APC7-0 1 0 1 L H H
BPA7-0 1 1 1 1 1 1 NO Change PWB-A.

Change Next

1134T187CA
Do as described below to check the input signal (Original
Glass Cooling Fan Motor Lock signal). (see T-3):
1) Make sure that the port is BPB3 on PWB-A (IC4A).
2) Select "I/O Port Data".
3) Is the data of BPB3 on PWB-A (IC4A) "H"? YES Change PWB-A.
6 IC Port Data BackUp Menu
2/8
IC Port 7 6 5 4/3 2 1 0
PWB-A BPB7-0 LHHHHHLH NO Change M3.
(IC4A) BPC7-0 HLLLHHHH
3-0
APA7-0 HHLLLH
1134T188CA
APB7-0 HH11HH00

T-73
2-3. C0070: Main Hopper Toner Replenishing Motor M8’s Failure to Turn
C0071: Main Hopper Toner Replenishing Motor M8 Turning at
Abnormal Timing
C0072: Sub Hopper Toner Replenishing Motor M9’s Failure to Turn

Symbol Name
M8 Main Hopper Toner
Replenishing Motor
M9 Sub Hopper Toner
Replenishing Motor
PC35 Toner Bottle Home Position
Sensor
S106 Sub Hopper Toner Empty
Switch
PWB-A Master Board

1136T014AA

1134C10TAA

T-74
∗ C0070, C0071

Step Check Item Result Action

1 Is PJ20A securely plugged into PWB-A? NO Plug it in securely.
2 Is CN35 connected securely? NO Connect it securely.
3 Are CN37 and CN34 connected securely? NO Connect them securely.
Open the Front Door and turn the Toner
Bottle 1/4 turn clockwise manually with the
Bottle Holder closed. Under the above
4 NO To Step 6.
condition, Does the Toner Bottle turn when
the Front Door Inter Lock Switch is turned
on?
Does the Toner Bottle stop at Home Position YES Change PWB-A.
5 after turning?
NO Change PC35.
Is the Voltage across PJ20AA-4 and GND YES Change M8.
6 DC0V when it is checked while repeating
Step 4? NO Change PWB-A.

∗ C0072

Step Check Item Result Action

1 Is PJ20A securely plugged into PWB-A? NO Plug it in securely.
2 Is CN35 connected securely? NO Connect it securely.
3 Are CN38 and CN44 connected securely? NO Connect them securely.
Is the amount of toner in the Sub Hopper so
4 scarce that the system detects a NO To Step 6.
toner-empty condition?
Do as described below to check the input
signal from S106 on detection of a toner
empty condition (see T-3):
1) Make sure that the port is APB1 on
PWB-A (IC4A).
5
2) Select "I/O Port Data".
3) Is the data of APB1 on PWB-A (IC4A)
NO Change S106.
"L"?
(IC4A) APB7-0 H L H H L L
APC7-0 1 0 1 L H H
BPA7-0 1 1 1 1 1 1
YES Change PWB-A.
1134T189CA

Check the output signal to M9 as described

below (see T-4):
1) Make sure that the port is APA2 on
PWB-A (IC4A).
2) Select "I/O Port Data".
6
3) Is the data of APA2 on PWB-A (IC4A)
YES Change M9.
"0"?
(IC1 ) PD3-0/PC3-0 L H
PWB-A APA7-0 11111011
(IC4A) APB7-0 HLHHHL
NO Change PWB-A.
APC7-0 101LH H
1134T190CA

T-75
2-4. C0100: Charge Corona Wire Winding Failure

Symbol Name
M10 PC Drum Charge Corona Wire
Winding Motor
PWB-A Master Board

1134T254AA

1134C14TAA

Step Check Item Result Action

1 Is PJ20AA securely plugged into PWB-A? NO Plug it in securely.
2 Is CN35 connected securely? NO Connect it securely.
3 Are CN39 and CN41 connected securely? NO Connect them securely.
Does the voltage across PJ20AA-7 on Change M10 or PC Drum Charge
YES
4 PWB-A and GND change from 24V to 0V Corona.
during wire winding?
NO Change PWB-A.

T-76
2-5. C0200: PC Drum Charge, Image Transfer/Paper Separator Coronas
Failure

Symbol Name
HV1 High Voltage Unit
PWB-A Master Board

1136T015AA

1134C11TAA

Step Check Item Result Action

Does "C0200" remain shown even after the Perform step 4.
PC Drum Charge and lmage Transfer/Paper
1 YES
Separator Coronas have been removed form
the copier?
Does "C0200" appear when the PC Drum Clean or replace the PC Drum
2 YES
Charge Corona is installed in the copier? Charge Corona.
Does "C0200" appear when the Image Clean or replace the Image
3 Transfer/Paper Separator Coronas are YES Transfer/Paper Separator
insralled in the copier? Coronas.
Does "C0200" remain shown even after CN1 NO Replace HV1.
4
has been unplugged from HV1?
YES Replace PWB-A.

T-77
2-6. C03XX (Control Board, Harness malfunction)

∗ C0300 to C0335
Step Action
Change EP3050/EP4050 PWB-A.
∗ C0350, C0370
Step Action
Check that PJ10A is securely plugged into EP3050/EP4050 PWB-A
1
and PJ7F into PWB-F.
2 Change PWB-F or EP3050/EP4050 PWB-A.
∗ C0351, C0352
Step Action
Check that the connector for connection of the copier and Paper
1
Feed Cabinet is without fault.
2 Check that PJ2A is plugged into PF-202/PF-102 PWB-A properly.
3 Change EP3050/EP4050 PWB-A or PF-202/PF-102 PWB-A.
∗ C0353
Step Action
Check that the connector for connection of the copier and Paper
1
Feed Cabinet is without fault.
2 Check that PJ2A is plugged into PF-202/PF-102 PWB-A properly.
Check that the connector for connection of the AD-5 and Paper Feed
3
Cabinet is without fault.
4 Check that PJ8G is plugged into PWB-G properly.
5 Change EP3050/EP4050 PWB-A, PF-202/PF-102 PWB-A or PWB-G.
∗ C0354, C0374
Step Action
Check that the connector for connection of the copier and Paper
1
Feed Cabinet is without fault.
2 Check that CN1A is plugged into C-301 PWB-A properly.
3 Change EP3050/EP4050 PWB-A or C-301 PWB-A.

T-78
2-7. C0400: Exposure Lamp LA1’s Failure to Turn ON
C0410: Exposure Lamp LA1 Turning ON at Abnormal Timing
Symbol Name
LA1 Exposure Lamp
TF2 Exposure Lamp Thermal Fuse
PWB-A Master Board
PWB-H AE Sensor Board
PU2 Power Supply Unit

1134C12TAA

T-79
Step Check Item Result Action
Do as described below to check whether the
Exposure Lamp LA1 turns ON or not when
the Start Key is turned ON (see T-4):
1) Make sure that the port is APA1 on
PWB-A (IC4A).
2) Select "I/O Port Data".
3) Is the data of APA1 on PWB-A (IC4A) NO Change PWB-A.
1 "1"?
(IC1 ) PD3-0/PC3-0 L H
PWB-A APA7-0 111 1 1 111
(IC4A) APB7-0 H L H HHL
APC7-0 10 1 L H H
BPA7-0 111 1 1 1

Change Next

1134T191CA

4) By pressing the "Change" key to change YES To Step 4.

the data from "1" to "0", does LA1 turn
ON?
Is the circuit across CN7-1 and -2 on the NO Check LA1 and Exposure Lamp
2 LA1 side conductive when CN7 (2P) is Thermal Fuse TF2 for continuity.
disconnected?
Is the voltage across PJ3-1 and -3 on the YES Change PU2.
3 Power Supply Unit PU2 the power supply
NO Check the power supply line.
voltage AC100V?

Is the voltage across PJ4AA-6 and GND Clean the AE Sensor or change
YES
4.0V or less when the Power Switch is PWB-H.
4
turned ON or the copier is in the standby
NO Change PWB-A.
state?

T-80
2-8. C0500: Warming-Up Failure
C0510: Abnormally Low Fusing Temperature
C0520: Abnormally High Fusing Temperature
C0522: Fusing Front/Rear Thermistor TH1/2 Malfunction
Symbol Name
H1 Fusing Heater Lamp
TS1 Fusing Thermoswitch
TH1 Fusing Front Thermistor
TH2 Fusing Rear Thermistor
SSR1 SSR
PWB-A Master Board

1134C13TAA

T-81
* C0500, C0510
Step Check Item Result Action
Does the Fusing Heater Lamp H1 light up Check the installation of the
when the Power Switch is turned ON? YES Fusing Front/Rear Thermistor
1
TH1/TH2 or clean TH1/TH2.
NO To Step 4.
Disconnect CN47 (4P). Is the resistance YES Change TH1.
2 across CN47-2 and 3 on the Fusing Unit NO Change PWB-A.
side infinite?
Disconnect CN48 (4P). Is the resistance YES Change TH2.
3 across CN48-2 and 3 on the Fusing Unit NO Change PWB-A.
side infinite?
Check the H1 ON/OFF signal from the
Master Board with the Power Switch ON and
the Front Door closed (see T-4):
1) Make sure that the port is P51 on
PWB-A (IC1A).
2) Select "I/O Port Data".
4 3) Is the data of P51 on PWB-A (IC1A) "0"? NO Change PWB-A.

IC Port Data 1/8 Menu

IC Port 7 6 5 4/3 2 1 0
PWB-A P47-0 1 H11L
(IC1A) P57-0 H 1010101
P67-0 0 001HHL1
P87-0 1 L 1 H
1134T192CA
PWB P 7 0 1 1111111

Disconnect CN4 (16P). Is there continuity YES Change SSR.

5 across CN4-8 and 9 on the Fusing Unit side? Check H1 and Fusing
NO
Thermoswitch TS1 for continuity.

T-82
* C0520, C0220
Step Check Item Result Action
Does the Fusing Heater Lamp H1 remain lit YES To Step 2.
1 up after the copier has completed warming NO To Step 3, 4.
up?
Check whether H1 is turned OFF or not by
changing the H1 ON/OFF signal from the
Master Board (see T-4):
1) Make sure that the port is P51 on
PWB-A (IC1A).
2) Select "I/O Port Data".
3) Is the data of P51 on PWB-A (IC1A) "1"? NO Change PWB-A.
2
IC Port Data 1/8 Menu

IC Port 7 6 5 4/3 2 1 0
PWB-A P47-0 1 H11L
(IC1A) P57-0 H 1010111
P67-0 0 001HHL1
P87-0 1 L 1 H
1134T193CA

4) By pressing the "Change" key to change NO Change SSR.

the data from "1" to "0", is H1 turned
OFF?
Disconnect CN47 (4P). Is the circuit across YES Change TH1.
CN47-2 and 3 on the Fusing Unit side Change PWB-A.
shorted? NO
3
Disconnect CN48 (4P). Is the circuit across YES Change TH2.
CN48-2 and 3 on the Fusing Unit side NO Change PWB-A.
shorted?

T-83
2-9. C0600: Scanner Motor M2 Malfunction
C0601: SCP Board PWB-J Malfunction
C0650: Scanner Reference Position Sensor PC81 Malfunction
C0660: Scanner Load Failure
C06F0 to C06F7: SHOME, BASE, TRON, SCEND Signal Failure
Symbol Name
PC81 Scanner Reference Position
M2 Sensor
PWB-J
M2 Scanner Motor
PC81
PWB-J SCP Board
PWB-A Master Board

PWB-A

1136C14TAA

T-84
* C0600, C0601

Step Check Item Result Action

1 Is PJ6J securely plugged into PWB-J? NO Plug it in securely.
Is the voltage across PJ6J-6 on PWB-J and Check the DC5V line.
2 GND DC5V when the Power Switch is NO
turned ON?
3 Is C0600 being shown? YES Replace M2.

4 Is C0601 being shown? YES Replace PWB-J.

* C0650

Step Check Item Result Action

Is PJ5J securely plugged into PWB-J and Plug them in securely.
1 NO
PJ43 into PC81?
Is the Light Blocking Plate installed properly? NO Reinstall it.
2
YES Replace PC81.

* C0660

Step Check Item Result Action

Do you feel an overload when you move the Correct or replace the Cables or
1 Scanner manually with the Power Switch YES part being overloaded.
OFF?

* C06F0 to C06F7

Step Check Item Result Action

Is PJ14AA securely plugged into PWB-A NO Plug them in securely.
1
and PJ2J into PWB-J?
YES Replace PWB-A or PWB-J.

T-85
2-10. C0610: Lens Motion Failure
C0620: 4th/5th Mirrors Motion Failure
Symbol Name
PWB-J PC86 Mirror Reference Position
Sensor
M7
PC90 Lens Reference Position Sensor

PC86 M6 Lens Motor

M7 Mirror Motor
PC90 M6
PWB-J SCP Board

1136C15TAA

T-86
* C0610

Step Check Item Result Action

Are PJ4J and PJ3J plugged securely into Plug them in securely.
1 NO
PWB-J, PJ47 into M6, and PJ31 into PC90?
Does the voltage across PJ3J-2 on PWB-J Replace PC90.
2 and GND change from DC5V to DC0V when NO
PC90 is blocked?
Do you feel an overload when you move the Correct or replace the Cable or
YES
3 Lens manually with the Power Switch OFF? part being overloaded.

NO Replace M6 or PWB-J.

* C0620

Step Check Item Result Action

Are PJ4J and PJ3J plugged securely into Plug them in securely.
1 NO
PWB-J, PJ48 into M7, and PJ32 into PC86?
Does the voltage across PJ3J-5 on PWB-J Replace PC86.
2 and GND change from DC5V to DC0V when NO
PC86 is blocked?
Do you feel an overload when you move the Correct or replace the part being
YES
3 4th/5th Mirrors manually with the Power overloaded.
Switch OFF?
NO Replace M7 or PWB-J.

T-87
2-11. C0910: 2nd Drawer Paper Lift-Up Failure
C0914: 2nd Drawer Paper Lift-Up Motor M14’s Failure to Turn
C0920: 1st Drawer Paper Lift-Up Failure
C0924: 1st Drawer Paper Lift-Up Motor M13’s Failure to Turn
Symbol Name
PC65 1st Drawer Paper Lift-Up Sensor
PWB-F PC66 2nd Drawer Paper Lift-Up
Sensor
PC67 1st Drawer Paper Lift-Up Motor
Pulse Sensor
PWB-A
PC65 PC67 PC68 2nd Drawer Paper Lift-Up Motor
Pulse Sensor
M13 1st Drawer Paper Lift-Up Motor
PC66
M14 2nd Drawer Paper Lift-Up Motor
M13 PWB-F S/P Board
M14
PWB-A Master Board
PC68

1134C08TAA

T-88
* C0910

Step Check Item Result Action

Slide out the 2nd Drawer and check the 2nd
Drawer Paper Lift-Up Sensor PC66 as
described below (see T-3):
1) Make sure that the port is PG0 on
PWB-F (IC1F).
2) Select "I/O Port Data".
3) Is the data of PG0 on PWB-F (IC1F) "L"? Check the Pressure Release
NO mechanism of the Paper Take-Up
IC Port Data BackUp Menu
3/8 Roll.
IC Port 7 6 5 4/3 2 1 0
PWB-A BPC7-0 1111
(IC5A) 3-0
PWB-F PB3-0/PA3-0 11111111
(IC1F) PD3-0/PC3-0 HHLLLH
PF3-0/PE3-0 HH11HH00
1 PH3-0/PG3-0 00LHHL
PWB-A(200) PB3-0/PA3-0 1 111111
(IC1A) PD3-0/PC3-0 LLHHLL
1134T194CA

4) Press down the Paper Take-Up Roll

Assy to unblock PC66.
5) Select "I/O Port Data" again. Has the YES Change PWB-F or PWB-A.
data of PG0 on PWB-F (IC1F) changed
NO Change PC66.
from "L" to "H"?

IC Port Data 3/8 BackUp Menu

IC Port 7 6 5 4/3 2 1 0
PWB-A BPC7-0 1111
(IC5A) 3-0
PWB-F PB3-0/PA3-0 11111111
(IC1F) PD3-0/PC3-0 HHLLLH
PF3-0/PE3-0 HH11HH00
PH3-0/PG3-0 00LHHH
PWB-A(200) PB3-0/PA3-0 1 111111
(IC1A) PD3-0/PC3-0 LLHHLL
1134T195CA

* C0920

Step Check Item Result Action

Slide out the 1st Drawer and check the 1st
Drawer Paper Lift-Up Sensor PC65 as
described below (see T-3):
1) Make sure that the port is PG3 on
PWB-F (IC1F).
2) Select "I/O Port Data".
3) Is the data of PG3 on PWB-F (IC1F) "L"? Check the Pressure Release
1 NO mechanism of the the Paper
IC Port Data 3/8 BackUp Menu Take-Up Roll.
IC Port 7 6 5 4/3 2 1 0
PWB-A BPC7-0 1111
(IC5A) 3-0
PWB-F PB3-0/PA3-0 11111111
(IC1F) PD3-0/PC3-0 HHLLLH
PF3-0/PE3-0 HH11HH00
PH3-0/PG3-0 00LHHL
PWB-A(200) PB3-0/PA3-0 1 111111
(IC1A) PD3-0/PC3-0 LLHHLL
1134T196CA

4) Press down the Paper Take-Up Roll

Assy to unblock PC65.

T-89
 Step Check Item Result Action
5) Select "I/O Port Data" again. Has the YES Change PWB-F or PWB-A.
data of PG3 on PWB-F (IC1F) changed
NO Change PC65.
from "L" to "H"?
IC Port Data 3/8 BackUp Menu

IC Port 7 6 5 4/3 2 1 0
PWB-A BPC7-0 1111
(IC5A) 3-0
PWB-F PB3-0/PA3-0 11111111
(IC1F) PD3-0/PC3-0 HHLLLH
PF3-0/PE3-0 HH11HH00
PH3-0/PG3-0 00HHHL
PWB-A(200) PB3-0/PA3-0 1 111111
(IC1A) PD3-0/PC3-0 LLHHLL
1134T197CA

* C0914

Step Check Item Result Action

Slide out the 2nd Drawer and slide it back YES To Step 3.
1 in. Does the 2nd Drawer Paper Lift-Up Motor
M14 rotate?
When the 2nd Drawer is slid in, does the YES Change M14.
2 voltage across PJ5F-3 on PWB-F and GND
NO Change PWB-F or PWB-A.
change from DC0V to DC24V?

While M14 is rotating, does the voltage YES Change PWB-F or PWB-A.
across PJ4F-5 on PWB-F and GND change
3 Check the inside of the Lift-Up
in the range DC0V to DC5V?
NO Motor Assy.
Change PC68.

* C0924

Step Check Item Result Action

Slide out the 1st Drawer and slide it back in. YES To Step 3.
1 Does the 1st Drawer Paper Lift-Up Motor
M13 rotate?
When the 1st Drawer is slid in, does the YES Change M13.
2 voltage across PJ5F-1 on PWB-F and GND
NO Change PWB-F or PWB-A.
change from DC0V to DC24V?

While M13 is rotating, does the voltage YES Change PWB-F or PWB-A.
across PJ4F-2 on PWB-F and GND change
3 Check the inside of the Lift-Up
in the range DC0V to DC5V?
NO Motor Assy.
Change PC67.

T-90
2-16. C0F02: Original Size Detecting Board UN2 Malfunction
C0FE1 to C0FFF: Original Size Detecting Sensor Failure

Symbol Name
PC115 Original Size Detecting Sensor
CD1
PC116 Original Size Detecting Sensor
FD1
PC117 Original Size Detecting Sensor
FD2
PC118 Original Size Detecting Sensor
FD3
PC119 Original Size Detecting Sensor
CD2
UN2 Original Size Detecting Board
PWB-A Master Board

1136C18TAA

T-100
* C0F02

Step Check Item Result Action

Is the jumper connector fitted properly Change the position of the
1 NO
across J1 and J2 on UN2? jumper connector.
Is PJ62 plugged securely into UN2 and
2 NO Plug then in securely.
PJ14A into PWB-A?
Is the voltage across PJ14AB-6 on PWB-A YES Replace PWB-A.
3
and GND changing between DC0V and 5V?
NO Replace UN2.

* C0FE1 to C0FFF

Step Check Item Result Action

Is the jumper connector fitted properly Change the position of the
1 NO
across J1 and J2 on UN2? jumper connector.
Is each Original Size Detecting Sensor
2 NO Install then correctly.
installed at the correct position?
Does the malfunction code reappear after
3 the corresponding Original Size Detecting YES Replace UN2 or PWB-A.
Sensor has been replaced?

Metric Areas Inch Areas

➊: PC116, ➋: PC117, ➌: PC118 (option), ➊: PC116 (option), ➋: PC117,
➍: PC115, ➎: PC119 (option) ➌: PC118 (option), ➍: PC115
∗ PC118 and PC119 are standard for Hong Kong
area.

A to E: Sensor Positions

A ➊ A ➊
➋ ➌ ➋ ➌
B C D E B C D E

A A

B ➍ ➍
➎

T-101
2-17. C0F10: AE Sensor Board PWB-H Malfunction

Symbol Name
PWB-H AE Sensor Board
PWB-A Master Board

1136C19TAA

Step Check Item Result Action

Is the voltage across PJ4AA-6 on PWB-A Check the photo receiver of
and GND 0.18 V or less when the Scanner YES PWB-H for contamination or
1 is at its home position, LA1 OFF, and the replace PWB-H.
Original Cover closed?
NO Replace PWB-A.

T-102
2-18. C0F20: AIDC Sensor UN3 Variation Correction Failure
C0F21: AIDC Sensor UN3 Contamination Correction Failure
C0F22: AIDC Sensor UN3 V G Correction Failure
C0F23: AIDC Sensor UN3 Exposure Correction Failure

Symbol Name
UN3 AIDC Sensor
PWB-A Master Board

1136C20TAA

Step Check Item Result Action

1 Is PJ20AA plugged securely into PWB-A? NO Plug it in securely.
2 Is CN35 connected securely? NO Connect it securely.
3 Is UN3 installed at the correct position? NO Install it at the correct position.
Is the photo receiver or LED of UN3 dirty? YES Clean UN3.
4
NO Replace UN3 or PWB-A.

T-103
2-19. C0F30: ATDC Sensor UN4 Failure
C0F31: ATDC Sensor UN4 Failure

Symbol Name
UN4 ATDC Sensor
PWB-A Master Board

1136C21TAA

Step Check Item Result Action

Is the value for "Set" of "ATDC Level" of
Enter the value given on the
1 "Level History" equal to the value given on NO
Adjust Label.
the Adjust Label?
2 Is PJ20AB plugged securely into PWB-A? NO Plug it in securely.
3 Is CN35 connected securely? NO Connect it securely.
4 Is UN4 installed at the correct position? NO Install it at the correct position.
Is the voltage across PJ20AB-8 on PWB-A YES Replace PWB-A.
5 and GND in the range between DC0.18V
and 4.52V while M1 is turning? NO Replace UN4.

T-104
2-20. C0900: 3rd Drawer Paper Lift-Up Failure
C0904: 3rd Drawer Paper Lift-Up Motor M24’s Failure to Turn
C0950: 4th Drawer Paper Lift-Up Failure
C0954: 4th Drawer Paper Lift-Up Motor M25’s Failure to Turn

Symbol Name
PC19 3rd Drawer Paper Lift-Up
Sensor
(EP3050/EP4050) PC23 4th Drawer Paper Lift-Up
Sensor
PC27 3rd Drawer Paper Lift-Up Motor
Pulse Sensor
PC28 4th Drawer Paper Lift-Up Motor
Pulse Sensor
M24 3rd Drawer Paper Lift-Up Motor
M25 4th Drawer Paper Lift-Up Motor
PWB-A PF-202 Control Board
PWB-A EP3050/EP4050 Master Board

1134C28TAA

T-105
∗C0900
Step Check Item Result Action
Slide out the 3rd Drawer and check the 3rd
Drawer Paper Lift-Up Sensor PC19 as
described below (see T-3):
1) Make sure that the port is PG3 on
PWB-A (200) (IC1A).
2) Select "I/O Port Data".
3) Is the data of PG3 on PWB-A (200) Check the Pressure Release
(IC1A) "L"? mechanism of the Paper Take-Up
Roll.
IC Port Data 4/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
PWB-A(200) PF3-0/PE3-0 LL00HL00
NO
(IC1A) PH3-0/PG3-0 00LL00
1 3-0
PD3-0/PC3-0 1134T199CA
HHLLLH
PF3 0/PE3 0 HH11HH00
4) Press down the Paper Take-Up Roll
Pressure Release Lever to unblock
PC19.

5) Select "I/O Port Data" again. Has the Change PF-202 PWB-A or
data of PG3 on PWB-A (200) (IC1A) YES EP3050/EP4050 PWB-A.
changed from "L" to "H"?
Change PC19.
IC Port Data 4/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
NO
PWB-A(200) PF3-0/PE3-0 LL00HL00
(IC1A) PH3-0/PG3-0 00HL00
3-0
PD3-0/PC3-0 1134T200CA
HHLLLH

T-106
∗C0950
Step Check Item Result Action
Slide out the 4th Drawer and check the 4th
Drawer Paper Lift-Up Sensor PC23 as
described below (see T-3):
1) Make sure that the port is PF3 on
PWB-A (200) (IC1A).
2) Select "I/O Port Data".
3) Is the data of PF3 on PWB-A (200) Check the Pressure Release
(IC1A) "L"? mechanism of the Paper Take-Up
Roll.
IC Port Data 4/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
PWB-A(200) PF3-0/PE3-0 LL00HL00 NO
(IC1A) PH3-0/PG3-0 00LL00
1
3-0 1134T201CA
PD3-0/PC3-0 HHLLLH

4) Press down the Paper Take-Up Roll

Pressure Release Lever to unblock
PC23.

5) Select "I/O Port Data" again. Has the Change PF-202 PWB-A or
data of PF3 on PWB-A (200) (IC1A) YES EP3050/EP4050 PWB-A.
changed from "L" to "H"?
Change PC23.
IC Port Data 4/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
PWB-A(200) PF3-0/PE3-0 HL00HL00
NO
(IC1A) PH3-0/PG3-0 00LL00
3-0 1134T202CA
PD3-0/PC3-0 HHLLLH

T-107
∗C0904
Step Check Item Result Action
Slide out the 3rd Drawer and slide it back in. To Step 3.
1 Does the 3rd Drawer Paper Lift-Up Motor YES
M24 rotate?
When the 3rd Drawer is slid in, does the YES Change M24.
2 voltage across PJ11A-3 on PF- 202 PWB-A
Change PF-202 PWB-A or
and GND change from DC0V to DC24V? NO
EP3050/EP4050 PWB-A.
While M24 is rotating, does the voltage Change PF-202 PWB-A or
YES
across PJ9AB-5 on PF-202 PWB-A and EP3050/EP4050 PWB-A.
3 GND change in the range DC0V to DC5V?
Check the inside of the Lift-Up
NO
Motor Assy.

∗C0954
Step Check Item Result Action
Slide out the 4th Drawer and slide it back in. To Step 3.
1 Does the 4th Drawer Paper Lift-Up Motor YES
M25 rotate?
When the 4th Drawer is slid in, does the YES Change M25.
2 voltage across PJ11A-1 on PF- 202 PWB-A
Change PF-202 PWB-A or
and GND change from DC0V to DC24V? NO
EP3050/EP4050 PWB-A.
While M25 is rotating, does the voltage Change PF-202 PWB-A or
YES
across PJ10A-9 on PF-202 PWB-A and EP3050/EP4050 PWB-A.
3 GND change in the range DC0V to DC5V?
Check the inside of the Lift-Up
NO Motor Assy.
Change PC28.

T-108
2-21. C0990: Main Tray Upward Motion Failure
C0991: Main Tray Downward Motion Failure
C0992: Main Tray Downward Motion Failure
C0993: Main Tray Upward Motion Failure
C0994: Main Tray Elevator Motor M26’s Failure to Turn

Symbol Name
PC2 Main Tray Lower Position
(EP3050 Sensor
/EP4050) PC5 Elevator Motor Pulse Sensor
PC19 3rd Drawer Paper Lift-Up
Sensor
M26 Main Tray Elevator Motor
PWB-H Cabinet Transport Board
PWB-A PF-102 Control Board
PWB-A EP3050/EP4050 Master Board

1134C29TAA

T-109
∗C0990, C0991
Step Check Item Result Action
Slide out the 3rd Drawer and check the 3rd
Drawer Paper Lift-Up Sensor PC19 as
described below (see T-3):
1) Make sure that the port is PG3 on
PWB-A (400) (IC1A).
2) Select "I/O Port Data".
3) Is the data of PG3 on PWB-A (400) Check the Pressure Release
(IC1A) "L"? mechanism of the Paper Take-Up
Roll.
IC Port Data 6/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
PWB-A(400) PF3-0/PE3-0 HH00HL
NO
(IC1A) PH3-0/PG3-0 00LL00
1 3-0
PD3-0/PC3-0 1134T203CA
HHLLLH

4) Press down the Paper Take-Up Roll

Pressure Release Lever to unblock
PC19.

5) Select "I/O Port Data" again. Has the Change PF-102 PWB-A or
data of PG3 on PWB-A (400) (IC1A) YES EP3050/EP4050 PWB-A.
changed from "L" to "H"?
Change PC19.
IC Port Data 6/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
PWB-A(400) PF3-0/PE3-0 HH00HL
NO
(IC1A) PH3-0/PG3-0 00HL00
3-0
PD3-0/PC3-0 1134T204CA
HHLLLH

T-110
∗C0992, C0993
Step Check Item Result Action
Slide out the 3rd Drawer and check the Main
Tray Lower Position Sensor PC2 as
described below (see T-3):
1) Make sure that the port is PC1 on
PWB-A (400) (IC2A).
2) Select "I/O Port Data".
3) Is the data of PC1 on PWB-A (400) Check that the Main Tray is in the
(IC2A) "L"? lowermost position.

IC Port Data 6/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
PWB-A(400) PF3-0/PE3-0 HH00HL
(IC1A) PH3-0/PG3-0 00LL00
NO
PWB-A(400) PB3-0/PA3-0 LLLHL11
1 (IC2A) PD3-0/PC3-0 H LHLL
PF3-0/PE3-0 HH11HH00
1134T205CA
00LHHL
PH3 0/PG3 0
4) With the 3rd Drawer slid out, lift up the
Main Tray to unblock PC2.

5) Select "I/O Port Data" again. Has the Change PF-102 PWB-A or
data of PC1 on PWB-A (400) (IC2A) YES EP3050/EP4050 PWB-A.
changed from "L" to "H"?

IC Port Data BackUp Menu

Change PC2, PWB-H or flat
6/8
cable.
IC Port 3 2 1 0/3 2 1 0
PWB-A(400) PF3-0/PE3-0 HH00HL
(IC1A) PH3-0/PG3-0 00LL00 NO
PWB-A(400) PB3-0/PA3-0 LLLHL11
(IC2A) PD3-0/PC3-0 H LHHL
PF3-0/PE3-0 HH11HH00
1134T206CA
00LHHL
PH3-0/PG3-0

∗C0994
Step Check Item Result Action
Does the Elevator Motor M26 rotate when To Step 3.
1 the Drawer Release Key is pressed? (Does YES
the Main Tray descend?)
When the Drawer is slid in or the Drawer Change M26.
YES
Release Key is pressed, does the voltage Check PWB-H and flat cable.
2 across PJ11A-1 (descent)/-2 (ascent) on
Change PF-102 PWB-A or
PF-102 PWB-A and GND change from NO EP3050/EP4050 PWB-A.
DC0V to DC24V?

While M26 is rotating, does the voltage Change PF-102 PWB-A or

YES
across PJ10A-5 on PF-102 PWB-A and EP3050/EP4050 PWB-A.
3 GND change in the range DC0V to DC5V?
Check the Pulse Discs, Gears,
NO etc.
Change PC5.

T-111
2-22. C0998: Shifter Transfer Failure
C0999: Shifter Return Failure
C099A: Shifter Return Failure
C099b: Shifter Transfer Failure
C099c: Shift Motor M27’s Failure to Turn

Symbol Name
PC3 Shifter Home Position Sensor
(EP3050
/EP4050) PC4 Shifter Return Position Sensor
PC6 Shift Motor Pulse Sensor
M27 Shift Motor
PWB-H Cabinet Transport Board
PWB-A PF-102 Control Board
PWB-A EP3050/EP4050 Master Board

1134C30TAA

T-112
∗C0998, C0999
Step Check Item Result Action
Slide out the 3rd Drawer and check the
Shifter Return Position Sensor PC4 as
described below (see T-3):
1) Make sure that the port is PD1 on
PWB-A (400) (IC2A).
2) Select "I/O Port Data".
3) Is the data of PD1 on PWB-A (400) Check the position of the Shift
(IC2A) "H"? Tray.
IC Port Data 6/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
PWB-A(400) PF3-0/PE3-0 HH00HL
NO
(IC1A) PH3-0/PG3-0 00LL00
PWB-A(400) PB3-0/PA3-0 LLLHL11
1
(IC2A) PD3-0/PC3-0 H LHHL
PF3-0/PE3-0 HH11HH00
1134T207CA
00LHHL
PH3 0/PG3 0
4) With the 3rd Drawer slid out, lift up the
Main Tray to unblock PC4.

5) Select "I/O Port Data" again. Has the Change PF-102 PWB-A or
data of PD1 on PWB-A (400) (IC2A) YES EP3050/EP4050 PWB-A.
changed from "H" to "L"?
Change PC4, PWB-H or flat
IC Port Data 6/8 BackUp Menu
cable.
IC Port 3 2 1 0/3 2 1 0
PWB-A(400) PF3-0/PE3-0 HH00HL
NO
(IC1A) PH3-0/PG3-0 00LL00
PWB-A(400) PB3-0/PA3-0 LLLHL11
(IC2A) PD3-0/PC3-0 L LHHL
PF3-0/PE3-0 HH11HH00
1134T208CA
00LHHL
PH3-0/PG3-0

T-113
∗C099A, C099b
Step Check Item Result Action
Slide out the 3rd Drawer and check the
Shifter Home Position Sensor PC3 as
described below (see T-3):
1) Make sure that the port is PC0 on
PWB-A (400) (IC2A).
2) Select "I/O Port Data".
3) Is the data of PC0 on PWB-A (400) Check the position of the Shift
(IC2A) "L"? Tray.
IC Port Data 6/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
PWB-A(400) PF3-0/PE3-0 HH00HL
NO
(IC1A) PH3-0/PG3-0 00LL00
PWB-A(400) PB3-0/PA3-0 LLHHL11
1 H LHHL
(IC2A) PD3-0/PC3-0
PF3-0/PE3-0 HH11HH00
PH3-0/PG3-0 1134T209CA
00LHHL
4) Remove the Shift Tray and Blocking
Plate to unblock PC3.

5) Select "I/O Port Data" again. Has the Change PF-102 PWB-A or
data of PC0 on PWB-A (400) (IC2A) YES EP3050/EP4050 PWB-A.
changed from "L" to "H"?

IC Port Data BackUp Menu

Change PC3, PWB-H or flat
6/8
cable.
IC Port 3 2 1 0/3 2 1 0
PWB-A(400) PF3-0/PE3-0 HH00HL
(IC1A) PH3-0/PG3-0 00LL00 NO
PWB-A(400) PB3-0/PA3-0 LLHHL11
(IC2A) PD3-0/PC3-0 H LHHH
PF3-0/PE3-0 HH11HH00
PH3-0/PG3-0 1134T210CA
00LHHL

∗C099c
Step Check Item Result Action
After loading a paper stack in the Shift Tray, To Step 3.
slide the 3rd Drawer into position. Does the
1 YES
Shift Motor M27 rotate? (Is the paper stack
transferred to the Main Tray?)

In Step 1, does the voltage across PJ11A-3 Change M27.

YES
(rightward motion) on PF-102 PWB-A and Check PWB-H and flat cable.
2 GND change from DC0V to DC24V?
Change PF-102 PWB-A or
NO
EP3050/EP4050 PWB-A.
While M27 is rotating, does the voltage Change PF-102 PWB-A or
YES
across PJ10A-12 on PF-102 PWB-A and EP3050/EP4050 PWB-A.
3 GND change in the range DC0V to DC5V?
Check the Pulse Discs, Gears,
NO Belt, etc.
Change PC5.

T-114
2-23. C0996: 3rd Drawer Lock Release Failure
C0F79: Paper Empty Sensor Failure

Symbol Name
PC1 Shift Tray Paper Empty Sensor
PC7 3rd Drawer Set Sensor
(EP3050/EP4050) PC20 3rd Drawer Paper Empty Sensor
SL41 3rd Drawer Lock Solenoid
PWB-E Main Tray Paper Empty Board
PWB-H Cabinet Transport Board
PWB-A PF-102 Control Board
PWB-A EP3050/EP4050 Master Board

1134C31TAA

T-115
∗C0996
Step Check Item Result Action
Check the operation of the 3rd Drawer Lock
Solenoid SL41 as described below (see T-4):
1) Make sure that the port is PA1 on
PWB-A (400) (IC2A).
2) Select "I/O Port Data"
3) Is the data of PA1 on PWB-A (400) Change PF-102 PWB-A or
(IC2A) "1" (SL41: deenergized)? EP3050/EP4050 PWB-A.

1 IC Port Data 6/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0 NO
PWB-A(400) PF3-0/PE3-0 HH00HL
(IC1A) PH3-0/PG3-0 00LL00
PWB-A(400) PB3-0/PA3-0 LLHHL11
(IC2A) PD3-0/PC3-0 H LHHL
PF3-0/PE3-0 H H1134T211CA
11HH00

4) By pressing the "Change" key to change Check the Drawer Lock

YES
the data from "1" to "0", does SL41 mechanism.
operate? (Make sure that SL41 makes a
NO Change SL41.
sound.)

Do as described below to check the 3rd

Drawer Paper Set Sensor PC7 when the 3rd
Drawer is slid in (see T-3):
1) Make sure that the port is PG2 on
PWB-A (400) (IC1A).
2) Select "I/O Port Data".
3) Is the data of PG2 on PWB-A (400) Check the 3rd Drawer Set
(IC1A) "L"? Detecting Plate.

IC Port Data 6/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0
PWB-A(400) PF3-0/PE3-0 HH00HL NO
2 (IC1A) PH3-0/PG3-0 00LL00
3-0
PD3-0/PC3-0 1134T212CA
HHLLLH
4) Remove the rear right door and forcibly
unlock the 3rd Drawer with a screwdriver
to push it out. (PC7: not blocked)

5) Select "I/O Port Data" again. Has the Change PF-102 PWB-A or
YES
data of PG2 on PWB-A (400) (IC1A) EP3050/EP4050 PWB-A.
changed from "L" to "H"?
Change PC7.
IC Port Data 6/8 BackUp Menu

IC Port 3 2 1 0/3 2 1 0 NO
PWB-A(400) PF3-0/PE3-0 HH00HL
(IC1A) PH3-0/PG3-0 00LH00
3-0
PD3-0/PC3-0 1134T213CA
HHLLLH

T-116
∗C0F79
Step Check Item Result Action
Does this failure occur when the Main Tray To Step 3.
1 YES
has completed upward motion?
Does this failure occur when the Main Tray To Steps 4, 5.
has completed downward motion or on
2 YES
completion of paper transfer from the Shift
Tray to the Main Tray?
With the paper stack lifting up the Actuator,
check the 3rd Drawer Paper Empty Sensor
PC20 as described below (see T-3):
1) Make sure that the port is PC0 on
PWB-A (400) (IC1A).
2) Select "I/O Port Data".
3
3) Is the data of PC0 on PWB-A (400) Change PF-102 PWB-A or
YES
(IC1A) "L"? EP3050/EP4050 PWB-A.
PH3-0/PG3-0 00LHHL
PWB-A(400) PB3-0/PA3-0 1 1 1111 Change PC20.
(IC1A) PD3-0/PC3-0 HLHH L

Change Next
NO

1134T214CA

Slide out the 3rd Drawer and do as

described below to check that no paper
exists on the Main Tray Paper Empty Board
PWB-E (see T-3):
1) Make sure that the port is PF3 on
PWB-A (400) (IC1A).
2) Select "I/O Port Data".
3) Is the data of PF3 on PWB-A (400) Change PWB-E, PWB-H or flat
(IC1A) "H"? cable.

IC Port Data 6/8 BackUp Menu

4 IC Port 3 2 1 0/3 2 1 0 NO
PWB-A(400) PF3-0/PE3-0 HH00HL
(IC1A) PH3-0/PG3-0 00HL00
3-0 1134T215CA

4) Using a sheet of paper, block PWB-E.

5) Select "I/O Port Data" again. Has the Change PF-102 PWB-A or
YES
data of PF3 on PWB-A (400) (IC1A) EP3050/EP4050 PWB-A.
changed from "H" to "L"?
Change PWB-E, PWB-H or flat
IC Port Data BackUp Menu cable.
6/8
IC Port 3 2 1 0/3 2 1 0 NO
PWB-A(400) PF3-0/PE3-0 L H 0 0 H L
(IC1A) PH3-0/PG3-0 0 0 H L 0 0
3-0 1134T216CA

T-117
Step Check Item Result Action
Do as described below to check the Shift
Tray Paper Empty Sensor PC1 with no
paper on the Shift Tray (see T-3):
1) Make sure that the port is PD1 on
PWB-A (400) (IC1A).
2) Select "I/O Port Data".
3) Is the data of PD1 on PWB-A (400) Change PC1, PWB-H or flat
(IC1A) "H"? cable.
PH3 0/PG3 0 00LHHL
PWB-A(400) PB3-0/PA3-0 1 1 1111
(IC1A) PD3-0/PC3-0 HLHH L
5 NO
Change Next

1134T217CA
4) Using a sheet of paper, block PC1.
5) Select "I/O Port Data" again. Has the Change PF-102 PWB-A or
YES
data of PD1 on PWB-A (400) (IC1A) EP3050/EP4050 PWB-A.
changed from "H" /to "L"?
Change PC1, PWB-H or flat
PWB-A(400) PB3-0/PA3-0 1 1 1111
(IC1A) PD3-0/PC3-0 LLHH L cable.
NO
Change Next

1134T218CA

T-118
2-24. C0d00: Duplex Unit Front/Rear Edge Guide Plates Home Position
Detection Failure
C0d20: Duplex Unit Trailing Gate Unit Home Position Detection
Failure
C0d50: Duplex Unit Drive Motor M31’s Failure to Turn
C0d51: Duplex Unit Drive Motor M31 Turning at Abnormal Timing

Symbol Name

(EP3050 PC8 Duplex Gate Home Position

/EP4050) Sensor
PC9 Front/Rear Edge Guide Plate
Home Position Sensor
M31 Duplex Unit Drive Motor
M32 Gate Motor
M33 Front/Rear Edge Guide Drive
Motor
PWB-G Duplex Unit Control Board
PWB-A PF-202, PF-102 Control Board
PWB-A EP3050/EP4050 Master Board

1134C32TAA

T-119
∗C0d00
Step Check Item Result Action
Slide out the Duplex Unit, move the YES Check for overload.
Front/Rear Edge Guide Plates to other than
Change M33.
their home positions, and slide the Duplex
1 Change PWB-G, PF-202, PF-102
Unit back in. At this time, does the NO PWB-A, or EP3050/EP4050
Front/Rear Edge Guide Drive Motor M33
PWB-A.
rotate?

Check the Front/Rear Edge Guide Plate

Home Position Sensor PC9 as described
below (see T-3):
1) Block PC9. (The Front/Rear Edge Guide
Plates are at their home positions.)
2) Make sure that the port is PC3 on
PWB-G (Dup) (IC1G).
2 3) Select "I/O Port Data"
4) Is the data of PC3 on PWB-G (Dup) Change PWB-G, PF-202, PF-102
(IC1G) "L"? YES PWB-A, or EP3050/EP4050
PH3 0/PG3 0 00LHHL PWB-A.
PWB-G(Dup) PB3-0/PA3-0 11 1 11
(IC1G) PD3-0/PC3-0 LHHH Change PC9.
Change Next NO
1134T219CA

∗C0d20
Step Check Item Result Action
While turning the Screw Cam, move the YES Check for overload.
Trailing Gate Unit to unblock the Duplex
• Change PWB-G, PF-202,
1 Gate Home Position Sensor PC8. When the
NO PF-102 PWB-A, or
Duplex Unit is slid into position in this state,
EP3050/EP4050 PWB-A.
does the Gate Motor M32 rotate?
• Change M32.
Check PC8 as described below (see T-3):
1) Block PC8. (The Trailing Gate Unit is at
its home position.)
2) Make sure that the port is PE0 on
PWB-G (Dup) (IC1G).
3) Select "I/O Port Data".
2
4) Is the data of PE0 on PWB-G (Dup) Change PWB-G, PF-202, PF-102
(IC1G) "L"? YES PWB-A, or EP3050/EP4050
PWB-A.
IC Port Data 7/8 BackUp Menu
Change PC8.
IC Port 3 2 1 0/3 2 1 0
PWB-G(Dup) PF3-0/PE3-0 0 0 0 0 H L NO
(IC1G) PH3-0/PG3-0 1 1 0 0 0 0
3-0 1134T220CA

T-120
∗C0d50, C0d51
Step Check Item Result Action
Check the Duplex Unit Drive Motor M31 as
described below (see T-4):
1) Make sure that the port is PB3 on
PWB-G (Dup) (IC1G).
2) Select "I/O Port Data".
3) Is the data of PB3 on PWB-G (Dup) Change PWB-G, PF-202, PF-102
(IC1G) "1"? PWB-A, or EP3050/EP4050
1 PF3 0/PE3 0 HH11HH00
PH3-0/PG3-0 00LHHL PWB-A.
PWB-G(Dup) PB3-0/PA3-0 11 1 11
(IC1G) PD3-0/PC3-0 LHHH NO
Change Next

1134T221CA

4) By pressing the "Change" key to change Check the rollers, gears, etc. for
YES
the data from "1" to "0", does M31 rotate? overload.
Do as described below to check the input
signal (Duplex Unit Drive Motor Lock signal)
when M31 is at a stop (see T-4):
1) Make sure that the port is PE1 on
PWB-G (Dup) (IC1G).
2) Select "I/O Port Data".
2 3) Is the data of PE1 on PWB-G (Dup) Change PWB-G, PF-202, PF-102
(IC1G) "H"? YES PWB-A, or EP3050/EP4050
PWB-A.
IC Port Data 7/8 BackUp Menu
Change M31.
IC Port 3 2 1 0/3 2 1 0
PWB-G(Dup) PF3-0/PE3-0 0 0 0 0 H L NO
(IC1G) PH3-0/PG3-0 1 1 0 0 0 0
3-0 1134T222CA
P 3 0/P 3 0 H H L L L H

T-121
3. Power is not Turned ON

Symbol Name
S1 Power Switch
RY1 Main Relay
UN1 Control Panel
PWB-B MSC Board
PWB-A Master Board
PWB-C Power Supply Board
PWB-D Noise Filter Board
PU1 DC Power Supply Unit

1134C36TAA

T-122
 Symptom Step Check Item Result Action
• RY1 is not turned Is the source voltage being Check the main fuse and
ON. 1 supplied to the circuit NO supply power. If they check
across PJ-1 and 3 of PU1? okay, replace PWB-D.
Is the voltage across PJ2-2 Check the fuse on PU1 and,
2 on PU1 and GND DC24V? NO if it checks okay, replace
PU1.
Is the voltage across Replace PWB-C.
3 PJ5C-2 on PWB-C and NO
GND 24V when S1 is OFF?
Are the voltages across Check S1.
PJ5C-1 on PWB-C and
4 GND, and across PJ5C-3 NO
on PWB-C and GND,
DC24V when S1 is ON?
Is the voltage across Replace PWB-C.
PJ8C-4 on PWB-C and
5 NO
GND DC24V when S1 is
ON?
Is the voltage across PJ4-1 Replace PU1.
6 on PU1 and GND DC5V NO
when S1 is ON?
Does the voltage across Replace PWB-A.
PJ5AB-8 on PWB-A and
7 GND instantaneously go NO
from HIGH to LOW when
S1 is turned ON?
Are the voltages across Check RY1.
PJ1C-3 on PWB-C and
8 GND, and across PJ1C-5 NO
on PWB-C and GND,
DC24V when S1 is ON?
• No control panel Is the voltage across PJ4-2 Replace PU1.
1 NO
Indicators light up, on PU1 and GND DC5V?
though RY1 is
Is the voltage across PJ2-3 Replace PU1.
turned ON. 2 NO
on PU1 and GND DC24V?
Are all PJs on PWB-B Plug them in securely.
3 plugged securely into NO
position?
Is PJ1I plugged securely Plug it in securely.
4 NO
into PWB-I?
Is PJ5A plugged securely NO Plug it in securely.
5 into PWB-A?
Replace PWB-A, PWB-B,
YES
UN1, or PWB-I.

T-123
 Copyright
1994 MINOLTA CO., LTD
Printed in Japan

Use of this manual should

be strictly supervised to
avoid disclosure of
confidential information.

MINOLTA CO., LTD. 1134-7998-11 94085550

Printed in Japan