TEST MODE <GR>

1. Operational procedures

1. Test Mode <GR>

1. Operational Procedures

The Test mode program enables a service technician to check the operation of each electrical
component in the machine.

1. [Starting Up Test mode]

Turn on the power, pressing down both the “LINE/PHOTO” and “M/P” buttons on the main panel.
If the Test mode is activated, the following indication will be displayed in the print quantity display.

- This is a sample of the initial condition of Test mode:

TEST MODE
Ver 1.23 SYSTEM 0
4.56 PANEL

2. [Checking the Operation of a Component]

To check the operation of a component, select
a test No. using panel keys.

TEST MODE
Ver 1.23 SYSTEM 23
4.56 PANEL
( Example: No. 23 )

To activate the selected test, press the "START" button.

TEST MODE
- TESTING -
23

To stop the test, press the "START" button again.

TEST MODE
Ver 1.23 SYSTEM 23
4.56 PANEL

3. [Selecting Another Test mode]

To select another Test mode, clear the set Test No. by pressing
the “C” or “STOP” button and select another Test No..

TEST MODE
Ver 1.23 SYSTEM 0
4.56 PANEL

TEST MODE
Ver 1.23 SYSTEM 19
4.56 PANEL
( Example: No. 19 )

(GR3750/2750) I-1 < Test Mode > APX (IV)-1

TEST MODE <GR>
1. Operational Procedures

4. [Exiting from the Test mode]

To exit from a Test mode, clear the set Test No. by pressing the “C” or “STOP” button and then
press the “ALL RESET” button.

TEST MODE
Ver 1.23 SYSTEM 23
4.56 PANEL

Clear the set Test No. by pressing “C” or “STOP” button.

TEST MODE
Ver 1.23 SYSTEM 0
4.56 PANEL

Exit from the Test mode by pressing “ALL RESET” button.

SELECT PRINT QUANTITY 0

LINE A4 BLACK

[ Note ]
As for the operation procedures of the Test mode in GR2710, GR1750 and GR1700,
refer to the pages APX (I)-1 and APX (I)-2.

APX (IV)-2 I-2 < Test Mode > (GR3750/2750)

 TEST MODE <GR>
2. Test Items and Operations
1) Sensor/SW Test

2. Test Items and Operations

1) Sensor/SW Test
A beep sounds in two ways to tell the current condition.
Detection: 0.1 second interval beep
No detection: 0.5 second interval beep

No Test Component Detection Status 3750 2750 2710 1750 1700

1
2 Paper size sensor Reflected light is detected.
3 Elevator lower limit sensor Light path is blocked.
4 Paper feed pressure switch The switch is released.
5 Master loading button The button is pressed.
6 Paper sensor Light path is blocked.
7 Pressure detection sensor Light path is blocked.
8 Position A sensor Light path is blocked.
9 0° Angular sensor Magnetism is detected.
10 180° Angular sensor Magnetism is detected.
11 Position C sensor Light path is blocked.
12 Feed-tray down button The button is pressed.
13 Clamp safety switch The switch is pressed.
14 Master removal hook sensor Light path is blocked.
15 Master positioning sensor Reflected light is detected.
16 Drum home position button The button is pressed.
17
18 Drum set switch The switch is pressed.
19 Paper receiving sensor 1 Light path is blocked.
20 Paper receiving sensor 2 Light path is blocked.
21 Scanner table (Upper cover) set switch The switch is pressed.
22 Vertical centering sensor Light path is blocked.
23 Master end sensor No reflected light.
24 Paper feed clutch sensor Light path is blocked.
25 Paper feed det. sensor Light path is blocked.
26 Jump wing switch 1 The switch is pressed.
27 Jump wing switch 2 The switch is pressed.
28 Master removal sensor Light path is blocked.
29 Master loading unit switch The switch is pressed.
30 Front cover set sensor Metal plate is attached.

NOTE: The status of the Elevator upper limit sensor can be checked by LED on the System PCB and Motor control PCB.
• The LED lights up when the actuator is pressed and the light path of the sensor is NOT blocked.
The status of the Paper detection sensor can be checked by LED on the System PCB.
• The LED lights up when the paper is detected and the sensor light is reflected back.

(All GR Models) I-3 < Test Mode > APX (IV)-3

TEST MODE <GR>
2. Test Items and Operations
1) Sensor/SW Test

1) Sensor/SW Test
A beep sounds in two ways to tell the current condition.
Detection: 0.1 second interval beep
No detection: 0.5 second interval beep

No Test Component Detection Status 3750 2750 2710 1750 1700

31 TPH home position switch The switch is pressed.
32 TPH pressure switch The switch is pressed.
33 Disposal box set switch The switch is pressed.
34 ADF original detection sensor Light path is opened.
35 Original registration sensor Light path is opened.
36 Original IN sensor Light path is blocked.
37 Ink sensor Ink is detected.
38 Overflow sensor Ink is detected.
39 Main motor interlock switch The switch is pressed.
40 Paper feed safety switch The switch is released.
41 Paper feed cassette SW1 Magnetism is detected.
42 Paper feed cassette SW2 Magnetism is detected.
43 Paper feed cassette SW3 Magnetism is detected.
44 Paper feed cassette SW4 Magnetism is detected.
45 Original OUT sensor Light path is blocked.
46 ADF switch The switch is pressed.
47 Master detection sensor Reflected light detected.
48 Master loading sensor Reflected light detected.
49 Scanner home position sensor Light path is blocked.
50 Scanner ADF shading sensor Light path is blocked.
51 Stage cover sensor Light path is blocked.
52 Flat bed original det. sensor Reflected light detected.
53 Pressure control sensor Light path is blocked.
54 Disposal box master sensor Light path is blocked.
55 Bottle set SW1 The switch is pressed.
56 Bottle set SW2 The switch is pressed.
57 Bottle set SW3 The switch is pressed.
58 Battery detection signal Battery is attached.
59 Option PCB detection signal Option PCB is attached.

NOTE: The status of the Elevator upper limit sensor can be checked by LED on the System PCB and Motor control PCB.
• The LED lights up when the actuator is pressed and the light path of the sensor is NOT blocked.
The status of the Paper detection sensor can be checked by LED on the System PCB.
• The LED lights up when the paper is detected and the sensor light is reflected back.

APX (IV)-4 I-4 < Test Mode > (All GR Models)

 TEST MODE <GR>
2. Test Items and Operations
2) Motor/Solenoid Test
3) Memory Clear, etc.

2) Motor/Solenoid Test

No. Test Item No. Test Item

60 15 rpm Drum rotation 71 Master removal solenoid & Vertical transport motor
61 30 rpm Drum rotation 72 Loading fan
62 Variable speed Drum rotation 73 Clamp solenoid
63 74 Lock solenoid
64 Separation Fan 75
65 Write pulse motor CW (Feed) 76 Pickup solenoid
66 Loading pulse motor 77 Thermal power control
67 Paper feed clutch 78 Pickup motor
68 Pressure solenoid 79 LED array in Image scanner ON
69 Suction motor (fan) 80 Wing motor (Except for GR1700)
70 Master removal fan

* Refer to the page on the "Memory Switch" for the Test modes No.81 through 88.

3) Memory Clear and Counter Stop, etc.

No. Test Item

90 Partial Memory Clear

Certain portion of RAM contents in the System PCB, such as Jam and Trouble messages,
will be initialized.
(The same operation as when turning the power ON while pressing All Reset button.)

91 Master Making Width Check (Except for GR1700)

92 Prevention of the following operations: master and copy counting, Key/card counter
and "T17 CALL SERVICE" or [E17] error signal display (for dead battery)
• In normal operation, the Master count and Copy count signals will not be output,
allowing a service technician to print without increasing the digit of the Master and Copy
counters.
• The machine will be released from this condition when the power is turned off.

97 All Memory Clear

All RAM contents in the System PCBs, excluding Memory switch settings by Test modes,
that is No.81 through 87, will be initialized. Master disposal count is not cleared.
NOTE: This test mode must be done each time System ROM, System PCB, or
Battery is changed.

98 Memory Switch Clear

Memory switch settings by Test modes No.81 through 87 will be initialized.
This test mode must be done each time System PCB is changed.
[CAUTION]
Do not use this test mode in normal operation.
All the programmed Memory switch settings in the machine will be initialized.

(All GR Models) I-5 < Test Mode > APX (IV)-5

TEST MODE <GR>
2. Test Items and Operations
4) Sequential Operation Test

4) Sequential Operation Test

No. Test Item

101 Ink motor operation

While the Drum rotates at the speed of 15 rpm, the Inking motor operates to supply the ink
into the Squeegee until the Ink sensor detects ink.
Then a blank master is loaded on the Drum and the Auto idling operates for 30 Drum
rotations and then stops at the "A" detection (Home) position.
• This test mode is used when filling an Inkless Drum with ink.

102 Elevator motor Up/Down operation

The following operations will be repeated while pressing down the Feed-tray down button.
• PRESS Elevator UP Upper limit sensor "ON" Elevator Stop
• PRESS Elevator Down Lower limit sensor "ON" Elevator Stop

103 Print positioning motor CW/CCW rotation (one-cycle check)

Return to vertical center position One second halt CW (+) direction rotation
One second halt CCW (-) direction rotation One second halt Return to vertical
center position Stop.

104 Clamp plate Open/Close operation (Press START button again to stop)

Rotate Drum to Home position Open Clamp plate (180°) One second halt
Close Clamp plate (0°) Rotate Drum to home position (Then go back to the first step).

105 ADF Original feed operation (Press START button again to stop)
(Except for GR3750/2750/2710)
Pick-up one original Shading operation Feed original Eject original
Original detection sensor ON Pick-up one original (Repeats this cycle until START
button is pressed.)

106 Confidential operation (Repeated by three cycles)

Confidential operation Pressure solenoid ON (one time Drum rotation) Pressure

solenoid OFF (five times Drum rotation).
(This is repeated three times and the machine stops.)

107 Paper feed & Printing operation (Press START button again to stop)

The paper feed tray raises and the paper is continuously fed until paper supply runs out.
Note: • The Copy counter does not operate and paper jam is not detected.
• Paper feed tray will be automatically lowered without paper.
• Ink can be supplied by the Inking motor.
• Printing speed key can be operated.

APX (IV)-6 I-6 < Test Mode > (All GR Models)

 TEST MODE <GR>
2. Test Items and Operations
4) Sequential Operation Test

4) Sequential Operation Test

No. Test Item

108 Flat bed read pulse motor (scanner) movement (Press START button again to stop)
(Except for GR1750/1700)
Image scanner home position sensor (2 sec. halt) Image scanner shading sensor (2
sec. halt) FB-ADF scanning position (2 sec. halt) Image scanner home position
sensor (2 sec. halt) • • • (This is repeated until START button is pressed.)

109 Machine aging operation

130 rpm Drum rotation 3000 times Magnet A detection Stop.

110 Elevator aging operation

UP Upper limit sensor ON Stop DOWN Lower limit sensor ON Stop

UP (This cycle is repeated for 5000 times) Stop.

111 Thermal pressure motor

If the TPH home position switch is pressed:

• TPH is lowered TPH pressure switch is pressed Stop.

If the TPH pressure switch is pressed:

• TPH is raised TPH home position switch is pressed Stop.

112 Cutter motor ON [One-cut operation]

113 FB-ADF Original feed operation (Press START button again to stop)
(Except for GR1750/1700)
Pick-up one original Feed original Eject original Original detection sensor ON
Pick-up one original (Repeats this cycle until START button is pressed.)

114 Pressure control motor

Center position One second halt Rotates to pressure setting No.12

Rotates to pressure setting No.1 Returns to center position (This cycle is repeated
three times) Stop.

115 Ink Thermistor check

Ink thermistor is defective if "00" or "FF" is shown on the display.

All other numbers indicate the thermistor is in good condition.
* Displayed number is not the temperature.

(All GR Models) I-7 < Test Mode > APX (IV)-7

TEST MODE <GR>
2. Test Items and Operations
4) Sequential Operation Test

4) Sequential Operation Test

No. Test Item

116 TPH Thermistor check

TPH thermistor is defective if "00" or "FF" is shown on the display.

All other numbers indicate the thermistor is in good condition.
* Displayed number is not temperature.

117 Thermal print head check operation 1

Makes a master of test pattern #1 memorized in the Image processing PCB.

118 Thermal print head check operation 2

Makes a master of test pattern #2 memorized in the Image processing PCB.

119 Thermal print head check operation 3

(Except for GR1750/1700)
Makes a master of test pattern #3 memorized in the Image processing PCB.

120 Thermal print head check operation 4

(Except for GR1750/1700)
Makes a master of test pattern #4 memorized in the Image processing PCB.

131 Suction clutch check

The Drum rotates at the speed of 15 rpm.

The clutch is activated ON and OFF by the key on the Operation panel.
*

APX (IV)-8 I-8 < Test Mode > (All GR Models)