ORDER NO.

CRT3377
DEH-1750/XN/GS

HIGH POWER CD PLAYER WITH FM/AM TUNER

DEH-1750
DEH-1770 /XN/CS
/XN/GS

This service manual should be used together with the following manual(s):
Model No. Order No. Mech.Module Remarks

CX-3110 CRT3178 S10.1 CD Mech. Module:Circuit Description, Mech. Description, Disassembly

For details, refer to "Important Check Points for Good Servicing".

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan

PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936
PIONEER CORPORATION 2004
K-ZZW. OCT. 2004 printed in Japan
 1 2 3 4

SAFETY INFORMATION
This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer.
Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely
A
repair complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty.
If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so
and refer the repair to a qualified service technician.

- Service Precaution
1. You should conform to the regulations governing the product (safety, radio and noise, and other
regulations), and should keep the safety during servicing by following the safety instructions
B
described in this manual.
2. Before disassembling the unit, be sure to turn off the power. Unplugging and plugging the connectors
during power-on mode may damage the ICs inside the unit.
3. To protect the pickup unit from electrostatic discharge during servicing, take an appropriate treatment
(shorting-solder) by referring to "the DISASSEMBLY".
4. After replacing the pickup unit, be sure to check the grating.

DEH-1750/XN/GS
2
1 2 3 4
 5 6 7 8

[Important Check Points for Good Servicing]

In this manual, procedures that must be performed during repairs are marked with the below symbol.
Please be sure to confirm and follow these procedures.
1. Product safety A

Please conform to product regulations (such as safety and radiation regulations), and maintain a safe servicing environment by
following the safety instructions described in this manual.

1 Use specified parts for repair.

Use genuine parts. Be sure to use important parts for safety.

2 Do not perform modifications without proper instructions.

Please follow the specified safety methods when modification(addition/change of parts) is required due to interferences such as
radio/TV interference and foreign noise.

3 Make sure the soldering of repaired locations is properly performed.

B
When you solder while repairing, please be sure that there are no cold solder and other debris.
Soldering should be finished with the proper quantity. (Refer to the example)

4 Make sure the screws are tightly fastened.

Please be sure that all screws are fastened, and that there are no loose screws.

5 Make sure each connectors are correctly inserted.

Please be sure that all connectors are inserted, and that there are no imperfect insertion.

6 Make sure the wiring cables are set to their original state.

Please replace the wiring and cables to the original state after repairs.
In addition, be sure that there are no pinched wires, etc.
C
7 Make sure screws and soldering scraps do not remain inside the product.

Please check that neither solder debris nor screws remain inside the product.

8 There should be no semi-broken wires, scratches, melting, etc. on the coating of the power cord.

Damaged power cords may lead to fire accidents, so please be sure that there are no damages.
If you find a damaged power cord, please exchange it with a suitable one.

9 There should be no spark traces or similar marks on the power plug.

When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure
connections and suitable usage. Please exchange the power cord if necessary.

0 Safe environment should be secured during servicing.

D
When you perform repairs, please pay attention to static electricity, furniture, household articles, etc. in order to prevent injuries.
Please pay attention to your surroundings and repair safely.

2. Adjustments
To keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification.
Adjustments should be performed in accordance with the procedures/instructions described in this manual.

3. Lubricants, Glues, and Replacement parts

Use grease and adhesives that are equal to the specified substance.
Make sure the proper amount is applied.
E

4. Cleaning
For parts that require cleaning, such as optical pickups, tape deck heads, lenses and mirrors used in projection monitors, proper
cleaning should be performed to restore their performances.

5. Shipping mode and Shipping screws

To protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be
installed before shipment. Please be sure to follow this method especially if it is specified in this manual.

DEH-1750/XN/GS
5 6 7 8
3
 1 2 3 4

CONTENTS
SAFETY INFORMATION ..................................................................................................................................... 2
1. SPECIFICATIONS ............................................................................................................................................ 5
A
2. EXPLODED VIEWS AND PARTS LIST ............................................................................................................ 8
2.1 PACKING ................................................................................................................................................... 8
2.2 EXTERIOR............................................................................................................................................... 10
2.3 CD MECHANISM MODULE..................................................................................................................... 12
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM .......................................................................................... 14
3.1 BLOCK DIAGRAM ................................................................................................................................... 14
3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE).............................................................................. 16
3.3 KEYBOARD UNIT.................................................................................................................................... 22
3.4 CD MECHANISM MODULE..................................................................................................................... 24
4. PCB CONNECTION DIAGRAM ..................................................................................................................... 28
4.1 TUNER AMP UNIT................................................................................................................................... 28
4.2 KEYBOARD UNIT.................................................................................................................................... 32
B 4.3 CD CORE UNIT(S10) .............................................................................................................................. 34
5. ELECTRICAL PARTS LIST ............................................................................................................................ 36
6. ADJUSTMENT ............................................................................................................................................... 39
6.1 CD ADJUSTMENT................................................................................................................................... 39
6.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT .................................................... 41
6.3 ERROR MODE ........................................................................................................................................ 43
6.4 SYSTEM MICROCOMPUTER TEST PROGRAM ................................................................................... 44
7. GENERAL INFORMATION ............................................................................................................................. 45
7.1 DIAGNOSIS ............................................................................................................................................. 45
7.1.1 DISASSEMBLY ..................................................................................................................................... 45
7.1.2 CONNECTOR FUNCTION DESCRIPTION .......................................................................................... 48
7.2 PARTS...................................................................................................................................................... 49
C 7.2.1 IC .......................................................................................................................................................... 49
7.2.2 DISPLAY ............................................................................................................................................... 56
7.3 OPERATIONAL FLOW CHART ............................................................................................................... 57
7.4 CLEANING............................................................................................................................................... 58
8. OPERATIONS ................................................................................................................................................ 59

DEH-1750/XN/GS
4
1 2 3 4
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1. SPECIFICATIONS

DEH-1750/XN/GS
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5
 1 2 3 4

DEH-1750/XN/GS
6
1 2 3 4
5 6 7 8

DEH-1750/XN/GS
5 6 7 8
7
 1 2 3 4

2. EXPLODED VIEWS AND PARTS LIST

NOTES : • Parts marked by " * " are generally unavailable because they are not in our Master Spare Parts List.
• The > mark found on some component parts indicatesthe importance of the safety factor of the part.
A Therefore, when replacing, be sure to use parts of identical designation.
• Screw adjacent to mark on the product are used for disassembly.
"
• For the applying amount of lobricants or glue, follow the instructions in this manual.
(In the case of no amount instructions,apply as you think it appropriate.)
2.1 PACKING

B 3 1 15
4 2

13

DEH-1750/XN/GS
8
1 2 3 4
 5 6 7 8
PACKING SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.

1 Accessory Assy CEA4850 12 Contain Box(DEH-1750) CHL5347

2 Screw Assy CEA3849 Contain Box(DEH-1770) CHL5348
A
3 Screw CBA1650 13 Protector CHP2664
* 4 Polyethylene Bag CEG-127
5 Screw CRZ50P090FTC 14 Protector CHP2868
15-1 Owner's Manual(DEH-1750) CRD3910
6 Screw TRZ50P080FTC Owner's Manual(DEH-1770) CRD3912
* 7 Polyethylene Bag CEG-158 15-2 Installation Manual(DEH-1750) CRD3911
8 Handle CNC5395 Installation Manual(DEH-1770) CRD3913
9 Bush CNV3930
10 Polyethylene Bag CEG-162 15-3 Caution Card CRP1310
16 Case Assy CXB3520
11 Carton(DEH-1750) CHG5418 17 Cord Assy XDE7008 B
Carton(DEH-1770) CHG5419

Owner's Manual,Installation Manual

Part No. Language

CRD3910 English, Traditional Chinese, Arabic

CRD3911 English, Traditional Chinese, Arabic

CRD3912 English, Spanish, Portuguese(B)

CRD3913 English, Spanish, Portuguese(B)
C

DEH-1750/XN/GS
5 6 7 8
9
 1 2 3 4

2.2 EXTERIOR

DEH-1750/XN/GS
10
1 2 3 4
 5 6 7 8
EXTERIOR SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.

1 Screw BSZ26P060FTC 47 Spring CBH2367

2 Screw BSZ26P100FTC A
3 Cable CDE7702 48 Bracket CNC6791
4 Cord Assy XDE7008 49 Holder CNC8042
5 Panel CNS8048 50 Cover CNM6276
51 Panel CNS8044
6 Case CNB2793 52 Arm CNV4692
7 Holder CNC8659
8 Insulator CNM9145 53 Arm CNV4728
9 Tuner Amp Unit(DEH-1750) CWM9601 54 Arm CNV5576
Tuner Amp Unit(DEH-1770) CWM9605 55 Screw IMS20P030FZK
56 Chassis Unit CXC3600
10 Screw ASZ26P060FTC 57 CD Mechanism Module(S10) CXK5605 B
11 Screw BMZ26P160FTC
12 Screw BPZ26P080FTC 58 Screw ISS26P055FTC
> 13 Fuse(10A) CEK1208 59 IC(IC302) TDA7386
14 Pin Jack(CN352) CKB1059 60 Transistor(Q921,991) 2SD2396

15 Plug(CN901) CKM1376
16 Connector(CN831) CKS3581
17 Connector(CN651) CKS3835
18 Antenna Jack(CN401) CKX1056
19 Holder CND2413
C
20 Holder CND2414
21 Heat Sink CNR1762
22 FM/AM Tuner Unit CWE1912
23 Holder CND1054
24 Terminal(CN402) VNF1084

25 Detach Grille Assy(DEH-1750) CXC3538

Detach Grille Assy(DEH-1770) CXC3542
26 Screw BPZ20P100FZK
27 Button(VOLUME) CAC8924
D
28 Button(SELECT) CAC8925

29 Button(BTB,SRC) CAC8927
30 Button(LOUD,BAND) CAC8928
31 Button(1-6) CAC8929
32 Button(CD EJECT,AUDIO) CAC8930
33 Button(DETACH) CAC8931

34 Spring CBH2210
35 Cover CNS8042
36 LCD CAW1847 E
37 Connector(CN1801) CKS3580
38 Holder CND2412

39 Sheet CNM9144
40 Lighting Conductor CNV8190
41 Rubber CNV8191
42 Connector CNV8192
43 Grille Unit(DEH-1750) CXC3592

Grille Unit(DEH-1770) CXC3994

44 Button CAC4836 F
45 Spring CBH1835
46 Spring CBH2208

DEH-1750/XN/GS
5 6 7 8
11
 1 2 3 4

2.3 CD MECHANISM MODULE

5
42
13 81
A
5 34
15 22
E
5
13 F

93

13 92
A 26
B 82
44 G

5 13 86 83
C 68
D
1 54 52
B 86
53 28 I H
4
37 28

4 71 45
23 J
1
55 87
5 36 38
4 50
73
1
23
18 29 72
K
2
64 51 10 75
47 1
C I
2 76 B 59
24 1 49
7
61 E
77 90
M F
2 1 48
63 Q
A 27
1
2 H 8
G J 67
21 L
M
1 N D
57 R O
16 17
79 12
D 58 1
3 78
1 33
2 P 46
62 2 20 60
80
40 6
1 1
N
60
1GEM1024 39
11
1
2GEM1045 1 89
25
69 43 10
3GEM1035 P L
30 70 K
56 19
E 14
74
41
R
31 85

C Q

91 14
C 65 35
1 O
85
31
3 2
F 66

85

DEH-1750/XN/GS
12
1 2 3 4
 5 6 7 8
CD MECHANISM MODULE SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.

1 CD Core Unit(S10) CWX3110 50 Gear CNV8379

2 Connector(CN101) CKS4182 A
3 Connector(CN701) CKS4188 51 Gear CNV8380
4 Screw BMZ20P035FTC 52 Gear CNV8381
5 Screw BSZ20P040FTC 53 Gear CNV8382
54 Gear CNV8383
6 Screw(M2x4) CBA1362 55 Gear CNV8384
7 Screw(M2x3) CBA1824
8 Screw(M2x3) CBA1825 56 Rack CNV8385
9 ••••• 57 Arm CNV8386
10 Washer CBF1038 58 Arm CNV8387
59 Guide CNV8388
11 Washer CBF1060 60 Roller CNV7218 B
12 Spring CBH2390
13 Spring CBH2606 61 Gear CNV8389
14 Spring CBH2607 62 Arm CNV8391
15 Spring CBH2608 63 Arm CNV8390
64 Arm CNV8392
16 Spring CBH2609 65 Damper CNV7313
17 Spring CBH2610
18 Spring CBH2735 66 Damper CNV7314
19 Spring CBH2612 67 Arm CNV8394
20 Spring CBH2613 68 Arm CNV8395
69 Guide CNV8396 C
21 Spring CBH2614 70 Guide CNV8397
22 Spring CBH2615
23 Spring CBH2616 71 Holder CNV8398
24 Spring CBH2617 72 Arm CNV8402
25 Spring CBH2620 73 Gear CNV8400
74 Damper CNV7618
26 Spring CBH2621 75 Motor Unit(M1) CXC4440
27 Spring CBH2641
28 Spring CBH2642 76 Chassis Unit CXC2318
29 Spring CBH2643 77 Screw Unit CXB8729
78 Gear Unit CXC2397 D
30 Spring CBH2659
79 Arm Unit CXC2316
31 Spring CBH2688 80 Arm CND1896
32 •••••
33 Shaft CLA4441 81 Arm CND1894
34 Frame CNC9962 82 Motor Unit(M2) CXB8933
35 Frame CNC9963 83 Bracket CNC9985
84 •••••
36 Bracket CND2712 85 Screw(M2x5) EBA1028
37 Bracket CND1895
38 Arm CNC9968 86 Screw JFZ20P020FTC
E
39 Arm CND1909 87 Screw JGZ17P022FTC
40 Lever CND2032 88 •••••
89 Washer YE20FTC
41 Lever CNC9984 90 Pickup Unit(P10)(Service) CXX1641
42 Sheet CNM8134
43 Collar CNV7798 91 Screw IMS26P030FTC
44 Guide CNV7799 92 Spring CBL1635
45 Arm CNV8403 93 Clamper CNV8372

46 Rack CNV8374
47 Holder CNV8376 F
48 Holder CNV8377
49 Arm CNV8378

DEH-1750/XN/GS
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13
 1 2 3 4

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM
A

A TUNER AMP UNIT

VDD

7 6 13 5 10 9 8 11 14 18 19 20 21
FM/AM TUNER UNIT

CE2

ROM_VDD

SL

DI
CK
CE1

NC

DO

NC

NC

NC

NC
NC
IC 3 EEPROM IC 5
←
5.0V 5V 3.3V

B
OSC LPF

ANTENNA CN401
AM ANT FMRF
1
1 ATT
2 Rch
24
IC 2
2.5V
FM ANT IC 1
3 3.3V
ATT Lch
23
FMRF MIXER, IF AMP DET, FM MPX,
RDS DECODER
RF adj
ANT adj

T51 CF52

C
AUDIOGND
OSCGND

IC 4
VDD_3.3
RFGND

DGND

←
3.3V 3.3V 2.5V 2.5V
VCC
NC

2 12 15 22 16 4 17

TUN 3V TUN L 2

VCC

CD L 3

VST,VCK,VDT

PICKUP UNIT
D
(P10)(SERVICE) C
D CD CORE UNIT(S10) MUTE
48

70
X1
CN101 CN701 X601
LASER Q101 CN651 69
DIODE LD+ 1 20 LOUT X2
14 3R3V LD LOUT 8 14

MD 2 23 43
5 PD SYSPW
xtal

AC, F, E, BD X201 SYSTEM CONTROLLER

HOLOGRAM
24
UNIT SERVO XTAL
FOP FOP
CONTROL,
FOCUS ACT.
TOP
1 DSP,
TOP
MONITOR TRACKING ACT. 4 LPF, DAC IC 601(2/2)
DIODE IC 652 PE5449A
12 XSI 2 4 16
IC 201 SO 16 6 XSI
12 FD, TD, SD, MD
FOP UPD63712AGC 29
13 LOEJ
TOP 42 28
LIMIT TC7SET08FU CONT
SPINDLE
ACT,MOTOR 79
MOTOR M DRIVER DISCSENS
HOME
16
SOP
15 78 VDSENS
SOM
17
LOADING/ CARRIAGE LCOM
M 18 22 LOEJ
VDCONT

MOTOR LCOP LOEJ 5 17

swvdd
DSENS

ILMPW
INTRQ

Q
KYDT

DPDT

9 CONT
E CONT 7 15 B.UP
66 41 8 65 9 21 22
IC 301
BA5835FP
DSCSNS Q
6 16
Q
VDD
VDSENS Q991
VD
VD 1 20 B.UP
12EJ 8EJ DSCSNS 2 21
3.3V REGULATOR
3 1
3R3V
IC 701 Q992

NJM2885DL1-33

DEH-1750/XN/GS
14
1 2 3 4
 5 6 7 8

RESET
1 IC 961 2
VDD
S-80834CNY

CN352 RCA OUT

60 RL 2
RL
reset Q352

CE2 55
TUNPCE2
CE1 56
TUNPCE1
DO 11
TUNPDI
DI 12
TUNPDO
CK 13
TUNPCK VDD REGULATOR B
Q911
76 SL VDD
Q912

SYSTEM CONTROLLER
IC 601(1/2) 32
PE5449A DALMON
CN901

BACKUP SENSE B.UP

64 FUSE
bsens 16 16 BACK UP
10A
Q931
63 ACC
asens 14 14 ACC
B REMOTE
ACC SENSE
5 IC 551 1
B.UP 11 11 B.REM
TPD1018F
6
49
ANTPW

15 15 GND C

B.UP
ELECTRONIC VOLUME/
SOURCE SELECTOR POWER AMP 6,20
TUN L 2 IN1-L
23
FL- 7 7 FL-
21
IC 151 10 14 IC 302 FL+ 5 5 FL+
FL FLIN TDA7386 3
PML010A 11 12 RL- 8 8 RL-
RL RLIN 5
CD L 3 IN2-L RL+ 6 6 RL+
MUTE STBY
22 4

VST,VCK,VDT
MUTE
SYS 8.4V REGULATOR
Q452 Q921
VCC
Q923
B.UP
48
UTE

X1
70 D
X601
69
X2

43 SYSPW
PW

R
TUNER 3.3V REGULATOR
IC 901
1 3
TUN 3V VCC

BA33BC0FP

B KEYBOARD UNIT
CN831 CN1801
Q821
ILM
B.UP 7 7
ILL
E

Q822
Q801
SWVDD SW5V
VDD 5 5

SOURCE

SOURCE SOURCE
6 6
DPDT DPDT
4 4
56 10
VLCD
VDD

DSENS DSENS KEY MATRIX

8 8 KEY DATA
18
DPDT LCD DRIVER/
KYDT KYDT KEY CONTROLLER
3 3
20 IC 1801
KTDT PD6340A LCD

DEH-1750/XN/GS
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15
 1 2 3 4

3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)

Note: When ordering service parts, be sure to refer to " EXPLODED VIEWS AND PARTS LIST" or
"ELECTRICAL PARTS LIST".
A
Large size
SCH diagram
A-a
A-a A-b

C CN701
A-a A-b Guide page

A-a A-b Detailed page

CD:+0.4dBs

FM:-20.4dBs
AM:-31.3dBs
C

ANTENNA

E NOTE :
Symbol indicates a resistor. Decimal points for resistor
No differentiation is made between chip resistors and and capacitor fixed values
discrete resistors. are expressed as :
Symbol indicates a capacitor. 2.2 ← 2R2
No differentiation is made between chip capacitors and 0.022 ← R022 B
discrete capacitors. CN1801

The > mark found on some component parts indicates

the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts of
identical designation.

A
DEH-1750/XN/GS
16
1 2 3 4
 5 6 7 8

A
A-b
A TUNER AMP UNIT

>
4dBs REAR L FM:+2.0dBs
FM: +2.8dBs AM: -8.9dBs
AM: -8.1dBs REAR R CD:+9.8dBs
CD:+10.6dBs
B

>
CEK1208
10A BACKUP

GND

ACC

B.REM

RL–

FL–

RL+
D
FL+

RR–

FR–

RR+

FR+

FM:+29.3dBs
AM:+18.4dBs
CD:+36.6dBs

A
DEH-1750/XN/GS
5 6 7 8
17
 F
E
B
A

D
C

18
A-a A-b

A-a
A-b

1
1

C CN701

CD:+0.4dBs

2
2

DEH-1750/XN/GS
2

3
3

FM:-20.4dBs
AM:-31.3dBs

4
4

3
4
 3
4
5

5
5

ANTENNA

6
6

NOTE :
Symbol indicates a resistor. Decimal points for resistor
No differentiation is made between chip resistors and and capacitor fixed values
discrete resistors. are expressed as :
Symbol indicates a capacitor. 2.2 ← 2R2
No differentiation is made between chip capacitors and 0.022 ← R022 B

DEH-1750/XN/GS
discrete capacitors. CN1801
6

The > mark found on some component parts indicates

7
7

the importance of the safety factor of the part.

Therefore, when replacing, be sure to use parts of
identical designation.
8

8
A-a A-b

A-a
A-b

19
E
A

D
C

F
B
 F
E
B
A

D
C

20
A-a A-b

A-b
1
1

1
A TUNER AMP UNIT

>
dBs REAR L FM:+2.0dBs
FM: +2.8dBs AM: -8.9dBs
AM: -8.1dBs REAR R CD:+9.8dBs

2
2

CD:+10.6dBs

DEH-1750/XN/GS
2

3
3

4
4

3
>
CEK1208
10A BACKUP

GND

ACC

B.REM

4
 3
>
CEK1208
10A BACKUP

GND

ACC

B.REM

4
RL–

FL–

RL+
5

5
FL+

RR–

FR–

RR+

5
FR+

FM:+29.3dBs
AM:+18.4dBs
CD:+36.6dBs

6
6

DEH-1750/XN/GS
6

7
7
8

8
A-a A-b

A-b
21
E
A

D
C

F
B
 1 2 3 4

3.3 KEYBOARD UNIT

B
DEH-1750/XN/GS
22
1 2 3 4
5 6 7 8

B KEYBOARD UNIT

A
CN831

CEL1651 (GREEN)

CEL1651 (GREEN)

D
CL-490S-WF-SD

E
D1803-D1809 : SML-310PT

B
DEH-1750/XN/GS
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23
 1 2 3 4

3.4 CD MECHANISM MODULE

A
PICKUP UNIT(P10)(SERVICE)

F F

B
T T

T T

F
F F

T T

T F
T
T
F F
T
F F

!
C

1
9
D

MOTOR DRIVER
@

S
M1 T
CXC4440
7 5
SPINDLE MOTOR
S
C

S F

8
E C
6
C
3
M2
CXB8933
LOADING/CARRIAGE
F
MOTOR
F

T
C

C
S
S

3.3V
REGULATOR

C
DEH-1750/XN/GS
24
1 2 3 4
 5 6 7 8

F
C

T
S
SWITCHES:
CD CORE UNIT(S10)
S901:HOME SWITCH..........ON-OFF
S903:DSCSNS SWITCH......ON-OFF
S904:12EJ SWITCH.............ON-OFF
S905:8EJ SWITCH...............ON-OFF

The underlined indicates the switch position.

RF AMP / SERVO / DSP SIGNAL LINE

DAC / LPF F
FOCUS SERVO LINE
T
TRACKING SERVO LINE
C
CARRIAGE SERVO LINE
S
SPINDLE SERVO LINE

9 C CD CORE UNIT(S10)
D
4 A
CN651
2
7.5V

@ 7.5V

E
6
3
$%
C

C
DEH-1750/XN/GS
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25
 1 2 3 4

- Waveforms Note : 1. The encircled numbers denote measuring points in the circuit diagram.
2. Reference voltage REFO1(1.65V)

A 1 DSCSNS 5V/div 500ms/div 1 DSCSNS 5V/div 500ms/div 5 SIN 1V/div 2s/div

2 CLCONT 5V/div 2 CLCONT 5V/div 6 CIN 500mV/div
3 LOEJ 5V/div 3 LOEJ 5V/div 7 TIN 500mV/div
4 VD 10V/div 4 VD 10V/div When setting up after loading a 12cm CD-DA
When loading a 12cm CD When loading an 8cm CD disc

Ref.: Ref.: Ref.:

GND GND REFO

Mode: Mode: Mode:

Normal Normal Normal
B

8 FIN 200mV/div 500ms/div 0 TE 500mV/div 200ms/div ! FE 500mV/div 20ms/div

9 RFOK 2V/div ! FE 500mV/div 8 FIN 500mV/div
5 SIN 2V/div 0 TE 500mV/div
7 TIN 500mV/div
When setting up "Source On"(12cm CD-DA) When setting up "Source On" During "Play"(CD-DA)

Ref.: Ref.: Ref.:

C REFO REFO REFO

Mode: Mode: Mode:

Normal Normal Normal

@ MDX 500mV/div 5ms/div @ MDX 500mV/div 5µs/div # RFAGC 500mV/div 0.5µs/div

5 SIN 1V/div 5 SIN 1V/div

Spindle waveform during "Play" Spindle waveform during "Play"(Magnified) RF eye pattern
D

Ref.: Ref.: Ref.:

REFO REFO REFO

Mode: Mode: Mode:

Normal Normal Normal

8 FIN 500mV/div 200ms/div 0 TE 500mV/div 2ms/div # RFAGC 1V/div 500µs/div

! FE 500mV/div # RFAGC 500mV/div 0 TE 500mV/div
E 7 TIN 500mV/div

Focus Search When "Tracking Open" 1 Track Jump

Ref.: Ref.: Ref.:

REFO REFO REFO

Mode: Mode: Mode:

TEST TEST TEST

DEH-1750/XN/GS
26
1 2 3 4
 5 6 7 8

# RFAGC 1V/div 500ms/div # RFAGC 1V/div 5ms/div # RFAGC 1V/div 500µs/div A

0 TE 500mV/div 0 TE 500mV/div 7 TIN 1V/div
7 TIN 500mV/div 7 TIN 500mV/div 0 TE 1V/div
8 FIN 1V/div
32 Track Jump 100(32x3) Track Jump When reproducing black dots(1mm)

Ref.: Ref.: Ref.:

REFO REFO REFO

Mode: Mode: Mode:

TEST TEST Normal
B

# RFAGC 1V/div 500µs/div # RFAGC 1V/div 5ms/div # RFAGC 1V/div 500µs/div

0 TE 1V/div 0 TE 1V/div 0 TE 1V/div
6 CIN 500mV/div 6 CIN 500mV/div 6 CIN 500mV/div
5 SIN 2V/div 5 SIN 2V/div 5 SIN 2V/div
During inside/outside search
When reproducing scratch(1mm) When reproducing fingerprint(65µm) (outer circumference → inner circumference)

Ref.: Ref.: Ref.:

REFO REFO REFO C

Mode: Mode: Mode:

Normal Normal Normal

$ LOUT 1V/div 200µs/div 1 DSCSNS 5V/div 200ms/div 1 DSCSNS 5V/div 200ms/div

% ROUT 1V/div 2 CLCONT 5V/div 2 CLCONT 5V/div
3 LOEJ 5V/div 3 LOEJ 5V/div

Analog Audio When "Eject"(12cm CD) When "Eject"(8cm CD)

D

Ref.: Ref.: Ref.:

AGND GND GND

Mode: Mode: Mode:

Normal Normal Normal

DEH-1750/XN/GS
5 6 7 8
27
 1 2 3 4

4. PCB CONNECTION DIAGRAM

4.1 TUNER AMP UNIT
A NOTE FOR PCB DIAGRAMS
1.The parts mounted on this PCB
include all necessary parts for A TUNER AMP UNIT
several destination.
For further information for
respective destinations, be sure
to check with the schematic dia-
gram.
2.Viewpoint of PCB diagrams Cord Assy
Connector Capacitor

SIDE A

B
SIDE B
P.C.Board Chip Part

F
C CN701
B CN1801

A
DEH-1750/XN/GS
28
1 2 3 4
 5 6 7 8

A
SIDE A

RCA

ANTENNA
B

FM/AM TUNER UNIT

D

F
B CN1801 FRONT

A
DEH-1750/XN/GS
5 6 7 8
29
 1 2 3 4

A
A TUNER AMP UNIT

A
DEH-1750/XN/GS
30
1 2 3 4
5 6 7 8

A
SIDE B

A
DEH-1750/XN/GS
5 6 7 8
31
 1 2 3 4

4.2 KEYBOARD UNIT

B KEYBOARD UNIT SIDE A

AUDIO
A

RIGHT

LEFT
EJECT

BAND
LOUD
B

LOC
6
C

5
4
3

D
2
1
BTB

SRC

E
VOL-
VOL+
CLK

B
DEH-1750/XN/GS
32
1 2 3 4
 5 6 7 8

B KEYBOARD UNIT SIDE B

A

A CN831

B
DEH-1750/XN/GS
5 6 7 8
33
 1 2 3 4

4.3 CD CORE UNIT(S10)

C CD CORE UNIT(S10) SIDE A

A

M2
LOADING
B /CARRIAGE
MOTOR

M1
SPINDLE
MOTOR

A
CN651
PICKUP UNIT(P10)(SERVICE)

D
HOME

REFO1

F E

C
DEH-1750/XN/GS
34
1 2 3 4
 5 6 7 8

C CD CORE UNIT(S10) SIDE B

A

8EJ
12EJ

DSCSNS B

3 2 1

C
DEH-1750/XN/GS
5 6 7 8
35
 1 2 3 4

5. ELECTRICAL PARTS LIST

NOTE:
A • Parts whose parts numbers are omitted are subject to being not supplied.
• The part numbers shown below indicate chip components.
Chip Resistor
RS1/_S___J,RS1/__S___J
Chip Capacitor (except for CQS.....)
CKS....., CCS....., CSZS.....
• The > mark found on some component parts indicatesthe importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts of identical designation.
Circuit Symbol and No. Part No. Circuit Symbol and No. Part No.
B L 151 (A,146,70) Inductor LAU2R2K
L 401 (A,158,58) Inductor LAU2R2K

A
L 402 (A,147,95) Inductor LAU2R2K

L 404 (B,161,101) Inductor LCTAW4R7J2520

Unit Number:CWM9601(DEH-1750) L 601 (A,94,85) Ferri-Inductor LAU100K
Unit Number:CWM9605(DEH-1770) L 602 (A,105,67) Inductor LAU2R2K
Unit Name:Tuner Amp Unit L 801 (A,94,25) Inductor LAU2R2K
L 901 (A,37,108) Choke Coil 600µH CTH1280
MISCELLANEOUS X 601 (A,104,72) Radiator 12.58291MHz CSS1402
>FU352 (B,144,135) Fuse 3A CEK1286
IC 151 (B,134,85) IC PML010A
AR401 (A,162,110) Surge Protector DSP-201M-S00B
C IC 302 (A,95,135) IC TDA7386
> Fuse 10A CEK1208
IC 551 (B,62,118) IC TPD1018F
FM/AM Tuner Unit CWE1912
IC 601 (B,88,62) IC PE5449A
IC 652 (B,113,45) IC TC7SET08FU
RESISTORS
IC 901 (B,144,29) IC BA33BC0FP
IC 961 (A,59,81) IC S-80834CNY R 157 (B,128,98) RAB4C102J
Q 352 (B,162,129) Transistor UMH3N R 301 (B,94,104) RS1/16S153J
Q 452 (B,140,128) Transistor UMD2N R 353 (B,146,128) RS1/16S821J
Q 801 (B,84,26) Transistor 2SA1036K R 354 (B,165,128) RS1/16S821J
R 357 (B,146,133) RS1/16S223J
Q 821 (B,43,16) Transistor 2SA1036K
Q 822 (B,32,18) Transistor DTC114EU R 358 (B,166,135) RS1/16S223J
D Q 912 (B,15,145) Transistor UMD2N R 405 (B,157,63) RS1/16S681J
Q 913 (A,16,111) Transistor 2SD1859 R 407 (B,161,88) RAB4C681J
Q 921 (A,9,104) Transistor 2SD2396 R 414 (B,161,91) RS1/16S681J
R 420 (B,100,48) RS1/16S681J
Q 923 (B,26,79) Transistor UMD2N
Q 931 (B,62,107) Transistor UMX1N R 421 (B,161,80) RS1/16S473J
Q 991 (A,9,69) Transistor 2SD2396 R 454 (B,137,127) RS1/16S103J
Q 992 (B,23,58) Transistor UMD2N R 455 (B,141,131) RS1/16S153J
D 551 (A,63,126) Diode MPG06G-6415G3 R 456 (B,141,133) RS1/16S221J
R 457 (B,100,50) RS1/16S681J
D 552 (A,60,126) Diode MPG06G-6415G3
D 831 (A,110,21) Diode 1SS270 R 601 (B,102,58) (DEH-1750) RS1/16S473J
D 832 (A,113,21) Diode 1SS270 (DEH-1770) RS1/16S333J
E D 833 (A,118,21) Diode 1SS270 R 602 (B,109,56) (DEH-1750) RS1/16S333J
D 834 (A,110,13) Diode 1SS270 (DEH-1770) RS1/16S473J
R 606 (B,112,62) RS1/16S104J
D 835 (A,113,13) Diode 1SS270
D 836 (A,118,13) Diode 1SS270 R 607 (B,106,63) RS1/16S222J
D 837 (A,115,21) Diode 1SS270 R 609 (B,104,44) RS1/16S473J
D 838 (A,115,13) Diode 1SS270 R 610 (B,100,52) RS1/16S681J
D 901 (A,36,132) Diode MPG06G-6415G3 R 611 (B,113,74) RS1/16S473J
R 614 (B,73,67) RS1/16S104J
D 902 (A,36,129) Diode MPG06G-6415G3
D 911 (A,20,107) Diode MPG06G-6415G3 R 633 (B,54,74) RS1/16S104J
D 912 (A,15,129) Diode HZS6L(B2) R 664 (B,77,52) RAB4C221J
D 921 (A,25,88) Diode HZS9L(B3) R 666 (A,84,44) RD1/4PU102J
F D 931 (A,70,116) Diode HZS7L(C3) R 667 (B,77,47) RAB4C221J
R 668 (A,81,44) RD1/4PU221J
D 932 (A,53,113) Diode HZS7L(A1)
D 991 (A,21,66) Diode HZS7L(C3) R 669 (B,101,43) RS1/16S221J

DEH-1750/XN/GS
36
1 2 3 4
 5 6 7 8

Circuit Symbol and No. Part No. Circuit Symbol and No. Part No.
R 801 (B,81,26) RS1/16S153J C 405 (B,169,97) CKSRYB103K50
R 802 (B,85,29) RS1/16S153J
R 803 (B,97,22) RS1/16S222J C 409 (B,148,58) CCSRCH470J50
R 821 (B,36,18) RS1/16S562J C 420 (B,106,44) CCSRCH470J50 A
C 451 (A,133,135) CEJQ330M10
R 822 (B,71,22) RS1/16S102J C 551 (B,70,120) CKSRYB103K50
R 823 (B,39,15) RS1/16S103J C 552 (B,67,123) CKSRYB103K50
R 833 (A,81,11) RD1/4PU222J
R 834 (A,84,11) RD1/4PU222J C 601 (B,70,83) CKSRYB103K50
R 835 (A,72,19) RD1/4PU102J C 603 (A,102,89) CEJQ4R7M35
C 604 (B,100,75) CCSRCH200J50
R 836 (A,78,22) RD1/4PU104J C 605 (B,103,75) CCSRCH200J50
R 837 (A,81,19) RD1/4PU103J C 606 (B,110,71) CKSRYB104K16
R 838 (B,91,89) RS1/16S102J
R 841 (B,50,15) RS1/16S1R0J C 607 (B,102,67) CCSRCH101J50
R 848 (A,107,48) RD1/4PU102J C 610 (A,102,83) CEJQ4R7M35
C 611 (B,97,80) CKSRYB224K10 B
R 851 (A,104,48) RD1/4PU102J C 654 (B,109,44) CKSRYB104K16
R 852 (B,93,89) RS1/16S102J C 801 (B,95,22) CKSRYB104K16
R 911 (B,20,141) RS1/16S223J
R 912 (A,13,134) RD1/4PU152J C 832 (B,47,13) CKSRYB104K16
R 923 (A,21,90) RD1/4PU821J C 901 (A,37,140) CEAT332M16(P45)
C 911 (A,18,96) CEJQ470M10
R 926 (B,15,101) RS1/16S221J C 912 (B,20,145) CKSRYB103K50
R 931 (B,67,112) RS1/16S473J C 913 (A,24,144) CEAT221M16
R 932 (B,67,110) RS1/16S104J
R 933 (A,56,116) RD1/4PU102J C 921 (A,26,66) 330µF/16V CCH1326
R 934 (B,61,110) RS1/16S472J C 922 (A,25,83) CEJQ101M16
C 923 (B,24,86) CKSRYB103K50
R 935 (B,57,106) RS1/16S473J C 961 (B,55,82) CKSRYB473K50 C
R 936 (B,57,110) RS1/16S223J C 963 (A,65,82) CEJQ100M16
R 940 (B,88,82) RS1/16S104J
R 941 (B,90,82) RS1/16S104J C 981 (B,133,25) CKSRYB334K10
R 961 (B,68,78) RS1/16S102J C 983 (A,145,38) CEJQ470M10
C 991 (B,18,64) CKSRYB473K50
R 962 (B,64,78) RS1/16S822J C 992 (A,18,54) CEJQ101M10
R 991 (A,21,61) RD1/4PU271J
R
R
R
992
993
994
(A,16,69)
(B,41,20)
(B,48,45)
RD1/4PU221J
RS1/16S222J
RS1/16S472J
B
Unit Number:CWM9622
CAPACITORS
Unit Name:Keyboard Unit
D
C 151 (B,161,74) CKSRYB224K10 MISCELLANEOUS
C 152 (B,161,76) CKSRYB224K10
C 153 (B,126,78) CKSRYB105K6R3 IC 1801 (B,26,94) IC PD6340A
C 154 (B,144,79) CKSRYB105K6R3 D 1803 (A,37,85) LED SML-310PT
C 155 (A,124,84) CEJQ4R7M35 D 1804 (A,37,97) LED SML-310PT
D 1805 (A,37,109) LED SML-310PT
C 156 (A,144,84) CEJQ4R7M35 D 1806 (A,37,49) LED SML-310PT
C 165 (B,143,73) CKSRYB104K16
C 166 (A,139,71) CEJQ470M10 D 1807 (A,37,61) LED SML-310PT
C 167 (A,129,71) CEJQ100M16 D 1808 (A,37,73) LED SML-310PT
C 301 (A,134,129) CFTNA224J50 D 1809 (A,37,121) LED SML-310PT
D 1810 (A,23,120) LED CL-490S-WF-SD
X 1801 (B,33,84) Ceramic Resonator 5.00MHz CSS1547
E
C 302 (A,130,111) CFTNA224J50
C 303 (A,134,125) CFTNA224J50
C 304 (A,124,111) CFTNA224J50 IL 1801 (B,21,21) Lamp 40mA,14V CEL1651
C 309 (B,137,132) CKSQYB225K10 IL 1802 (B,21,151) Lamp 40mA,14V CEL1651
C 310 (B,138,136) CKSQYB225K10 LCD CAW1847

C 311 (A,98,122) CEJQ2R2M50 RESISTORS

C 312 (A,105,125) CEJQ100M16
C 313 (B,101,142) CKSRYB104K16 R 1801 (B,22,60) RS1/16S222J
C 353 (A,136,120) CEJQ2R2M50 R 1802 (B,24,60) RS1/16S222J
C 354 (A,136,111) CEJQ2R2M50 R 1804 (B,14,157) RS1/16S0R0J
R 1806 (B,28,156) RS1/16S0R0J
C 401 (B,162,70) CKSRYB103K50 R 1807 (B,22,33) RS1/4SA471J F
C 402 (B,156,60) CKSRYB103K50
C 403 (A,153,58) CEJQ470M6R3 R 1808 (B,19,33) RS1/4SA471J
C 404 (A,152,95) CEJQ101M10 R 1809 (B,32,122) RS1/4SA471J
R 1810 (B,37,92) RS1/16S104J
DEH-1750/XN/GS
5 6 7 8
37
 1 2 3 4

Circuit Symbol and No. Part No. Circuit Symbol and No. Part No.
C 213 (A,21,29) CKSSYB103K16
CAPACITORS C 214 (A,23,26) CKSSYB104K10
C 215 (A,25,23) CKSSYB104K10
A C 1801 (B,37,96) CKSRYB103K50 C 216 (A,24,21) CKSSYB103K16
C 1802 (A,19,125) CKSRYF104Z25 C 217 (A,21,18) CCSSCH560J50

C
C 218 (A,24,14) CCSSCH5R0C50
C 219 (A,28,14) CKSSYB104K10
Unit Number:CWX3110 C 220 (B,27,24) CKSSYB104K10
C 221 (B,41,21) CKSSYB104K10
Unit Name:CD Core Unit(S10) C 222 (A,35,12) CKSSYB103K16

MISCELLANEOUS C 223 (A,37,14) CCSSCH680J50

C 224 (A,45,11) CCSSCH470J50
IC 201 (A,35,25) IC UPD63712AGC C 225 (A,46,14) CKSSYB103K16
IC 301 (A,45,81) IC BA5835FP C 231 (A,30,43) CKSSYB102K50
B IC 701 (B,53,56) IC NJM2885DL1-33 C 232 (B,38,64) CKSSYB102K50
Q 101 (B,22,12) Transistor 2SA1577
X 201 (A,45,36) Ceramic Resonator 16.934MHz CSS1603 C 301 (B,37,74) 100µF/16V CCH1504
C 302 (A,54,71) CKSSYB221K50
S 901 (A,15,44) Switch(HOME) CSN1067 C 303 (A,45,68) CKSSYB221K50
S 903 (B,53,101) Switch(DSCSNS) CSN1068 C 304 (A,33,73) CKSSYB472K25
S 904 (B,35,109) Switch(12EJ) CSN1067 C 305 (A,36,74) CKSSYB103K16
S 905 (B,48,110) Switch(8EJ) CSN1067
C 306 (B,45,94) CKSSYB104K10
RESISTORS C 501 (B,45,51) CKSSYB103K16
C 502 (A,61,68) CKSSYB103K16
R 101 (B,26,13) RS1/10SR2R4J C 703 (B,47,61) CKSQYB104K16
R 102 (B,28,15) RS1/10SR2R4J C 704 (B,54,63) CKSQYB105K10
C
R 103 (B,29,12) RS1/10SR2R7J
R 201 (A,58,26) RS1/16SS102J Miscellaneous Parts List
R 214 (A,23,28) RS1/16SS332J
Pickup Unit(P10)(Service) CXX1641
R 215 (A,21,27) RS1/16SS183J M 1 Motor Unit(SPINDLE) CXC4440
R 216 (A,24,19) RS1/16SS122J M 2 Motor Unit(LOADING/CARRIAGE) CXB8933
R 217 (A,22,15) RS1/16SS562J
R 218 (A,24,16) RS1/16SS472J
R 235 (A,27,44) RS1/16SS103J

R 236 (A,31,46) RS1/16SS103J

R 301 (A,54,73) RS1/16SS183J
R 302 (A,54,70) RS1/16SS822J
D
R 303 (A,45,70) RS1/16SS183J
R 304 (A,47,69) RS1/16SS822J

R 305 (A,34,75) RS1/16SS183J

R 306 (A,32,69) RS1/16SS183J
R 307 (A,38,74) RS1/16SS183J
R 308 (A,36,67) RS1/16SS183J
R 601 (B,52,43) RS1/16SS101J

R 602 (B,46,42) RS1/16SS101J

R 603 (B,48,48) RS1/16SS0R0J
R 901 (B,48,103) RS1/16SS104J
E R 902 (B,46,105) RS1/16SS473J
R 903 (B,44,106) RS1/16SS273J

CAPACITORS

C 103 (B,13,8) 100µF/16V CCH1504

C 109 (A,34,12) CKSSYB104K10
C 201 (A,45,19) CKSSYB104K10
C 202 (A,53,21) CKSSYB102K50
C 205 (B,37,36) 22µF/6.3V CCH1507

C 206 (B,40,30) CKSSYB103K16

C 207 (A,46,30) CKSSYB104K10
F C 209 (A,46,31) CKSSYB104K10
C 210 (A,41,35) CKSSYB104K10
C 211 (A,33,35) CKSSYB104K10

DEH-1750/XN/GS
38
1 2 3 4
 5 6 7 8

6. ADJUSTMENT
6.1 CD ADJUSTMENT
A

1) Cautions on adjustments 2) Test mode

• In this product the single voltage (3.3V) is used for the This mode is used to adjust the CD mechanism module.
regulator. The reference voltage is the REFO1 (1.65V) • To enter the test mode.
instead of the GND. While pressing the 4 and 6 keys at the same time, reset.
If you should mistakenly short the REFO1 with the GND • To exit from the test mode.
during adjustment, accurate voltage will not be obtained, Turn off the ACC and back up.
and the servo’s misoperation will apply excessive shock
to the pickup. To avoid such problems: Notes:
a. Do not mix up the REFO1 with the GND when a. During ejection, do not press any other keys than the
connecting the (-) probe of measuring instruments. EJECT key until the loaded disc is ejected.
Especially on an oscilloscope, avoid connecting the (-) b. If you have pressed the (→) key or (←) key during focus B
probe for CH1 to the GND. search, turn off the power immediately to protect the
b. In many cases, measuring instruments have the same actuator from damage caused by the lens stuck.
potential as that for the (-) probe. Be sure to set the c. For the TR jump modes except 100TR, the track jump
measuring instruments to the floating state. operation will continue even if the key is released.
c. If you have mistakenly connected the REFO1 to the GND, d. For the CRG move and 100TR jump modes, the tracking
turn off the regulator or the power immediately. loop will be closed at the same time when the key is
released.
• Before mounting and removing filters or leads for e. When the power is turned off and on, the jump mode
adjustment, be sure to turn off the regulator. is reset to the single TR (91), the RF amp gain is set to 0dB,
and the auto-adjustment values are reset to the default
• For stable circuit operation, keep the mechanism settings.
operating for about one minute or more after the C
regulator is turned on.

• In the test mode, any software protections will not

work. Avoid applying any mechanical or electrical
shock to the mechanism during adjustment.

• The RFI and RFO signals with a wide frequency range

are easy to oscillate. When observing the signals,
insert a resistor of 1k ohms in series.

• The load and eject operation is not guarantied with the

D
mechanism upside down. If the mechanism is blocked
due to mistaken eject operation, reset the product or
turn off and on the ACC to restore it.

DEH-1750/XN/GS
5 6 7 8
39
 1 2 3 4

- Flow Chart

[KEY] [4]+[6]+Reset
A
Test Mode In
Contents

Display

[CD]or[SOURCE]
Source On

TRK MIN

[BAND] [3]
Power On Power On
(T.Offset is adjusted) (T.Offset is not adjusted)
TRK 00 MIN00 SEC 00 TRK 99 MIN 99 SEC 99

[BAND] [3] [6] [1] [→] [←] [2]

*3
Focus Close / Focus Mode Tracking Servo CRG+ *8 *8 Automatic adjustment
Power Off *2 CRG-
S curve check switching Close display switching
TRK MIN SEC TRK
91 MIN91 SEC 91 TRK MIN SEC
0x 0x 0x TRK
00 MIN00 SEC00 TRK
00 MIN00 SEC00 TRK
00 MIN00 SEC00 TRK
?? MIN?? SEC ??
TRK
or 99 MIN99 SEC99 or TRK
99 MIN99 SEC 99 or TRK
99 MIN 99 SEC 99

[BAND] [1] [6] [3] [→] [←] [2]

T.Close and F,T AGC
T.Close and RF AGC / CRG+ CRG- T.Balance adjustment
Power Off and RF AGC
Applicable servomechanism RF AGC coefficient display T.Balance coefficient display
Applicable servomechanism
TRK MIN SEC TRK xx MINxx SEC xx TRK xx MIN xx SEC xx TRK ?? MIN ?? SEC ?? TRK8x MIN8x SEC8x TRK8x MIN8x SEC8x TRK ?? MIN?? SEC ??

or TRK 9x MIN 9x SEC 9x or TRK 9x MIN 9x SEC 9x

[BAND] [1] [3] [6] [→] [←] [2]

*7 *5 *4 *4
F,T,RF AGC / F,T AGC /F.Bias CRG/TR Jump value Tracking Open
Power Off CRG/TR Jump + CRG/TR Jump -
F.Bias display switching RF AGC switching
TRK MIN SEC TRK
?? MIN?? SEC ?? TRK
xx MINxx SEC xx TRK
xxMIN xxSEC xx TRK
xxMIN xxSEC xx TRK
xxMIN xxSEC xx TRK
8x MIN8x SEC 8x
TRK
or 9xMIN 9xSEC 9x
*6

[BAND] [2]

Power Off Tracking Open

TRK MIN SEC TRK8x MIN8x SEC8x

or TRK 9x MIN 9x SEC 9x

*1) TYP → -12dB Operation

TRK MIN SEC TRK 12 MIN 12 SEC 12 [Key]
Test Mode

*2) Focus Close → S.Curve → F EQ measurement setting [BAND] Power On / Off

TRK 00 MIN 00 SEC 00 TRK 01 MIN 01 SEC 01 TRK 02 MIN 02 SEC 02
(TRK 99 MIN 99 SEC 99) CRG + / TR Jump +
[→]
(Direction of the external surface)
*3) F.Offset Display → RF.Offset Display → T.Offset Display
CRG - / TR Jump -
[←]
(Direction of the internal surface)
*4) 1TR/32TR/100TR CLS and AGC and Applicable servomechanism /
[1]
AGC, AGC display switching
E *5) Single TR → 32TR → 100TR → CRG Move RF Gain switching / Offset adjustment display /
9x(8x) : 91(81) 92(82) 93(83) 94(84) [2]
T.Balance adjustment / T.Open
Close, S.Curve /
[3]
*6) Only at the time of CRG Move or 100TR Jump Rough Servo and RF AGC / F, T, RF AGC
*7) TRK/MIN/SEC → F.AGC → T.AGC Gain → F.bias → RF AGC SPDL 1X / 2X switching
-
(Double-speed compatibility only)

*8) CRG motor voltage = 2[V] - Gop measurement

Forcus Mode switching / Tracking Close

[6]
/ CRG, TR Jump switching

DEH-1750/XN/GS
40
1 2 3 4
 5 6 7 8

6.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT

• Note :
The grating angle of the PU unit cannot be adjusted after the PU unit is changed. The PU unit in the CD mechanism
module is adjusted on the production line to match the CD mechanism module and is thus the best adjusted PU
unit for the CD mechanism module. Changing the PU unit is thus best considered as a last resort. However, if the
PU unit must be changed, the grating should be checked using the procedure below.

• Purpose :
To check that the grating is within an acceptable range when the PU unit is changed.

• Symptoms of Mal-adjustment : B
If the grating is off by a large amount symptoms such as being unable to close tracking, being unable to perform
track search operations, or taking a long time for track searching.

• Method :
• Measuring Equipment • Oscilloscope, Two L.P.F.
• Measuring Points • E, F, REFO1
• Disc • TCD-782
• Mode • TEST MODE

CD CORE UNIT(S10)
C

L.P.F.

Xch Ych
E 100kΩ
Oscilloscope
VREF 390pF

F 100kΩ

VREF 390pF

L.P.F.
REFO1

D
F
E

• Checking Procedure
1. In test mode, load the disc and switch the 3V regulator on.
2. Using the → and ← buttons, move the PU unit to the innermost track.
3. Press key 3 to close focus, the display should read "91". Press key 2 to implement the tracking balance
adjustment the display should now read "81". Press key 3. The display will change, returning to "81" on the
fourth press.
4. As shown in the diagram above, monitor the LPF outputs using the oscilloscope and check that the phase
E
difference is within 75° . Refer to the photographs supplied to determine the phase angle.
5. If the phase difference is determined to be greater than 75° try changing the PU unit to see if there is any
improvement. If, after trying this a number of times, the grating angle does not become less than 75° then the
mechanism should be judged to be at fault.
• Note
Because of eccentricity in the disc and a slight misalignment of the clamping center the grating waveform may be
seen to "wobble" ( the phase difference changes as the disc rotates). The angle specified above indicates the
average angle.
• Hint
Reloading the disc changes the clamp position and may decrease the "wobble".

DEH-1750/XN/GS
5 6 7 8
41
 1 2 3 4

Grating waveform Ech → Xch 20mV/div, AC

Fch → Ych 20mV/div, AC
A
0° 30°

45° 60°

75° 90°

DEH-1750/XN/GS
42
1 2 3 4
 5 6 7 8

6.3 ERROR MODE

- Error Messages
If a CD is not operative or stopped during operation due to an error, the error mode is turned on and cause(s) of A
the error is indicated with a corresponding number. This arrangement is intended at reducing nonsense calls from
the users and also for facilitating trouble analysis and repair work in servicing.

(1) Basic Indication Method

1) When SERRORM is selected for the CSMOD (CD mode area for the system), error codes are written to DMIN
(minutes display area) and DSEC (seconds display area). The same data is written to DMIN and DSEC. DTNO
remains in blank as before.

2) Head unit display examples

B
Depending on display capability of LCD used, display will vary as shown below. xx contains the error number.

8-digit display 6-digit display 4-digit display

ERROR–xx ERR–xx E–xx

(2) Error Code List

Code Class Displayed error code Description of the code and potential cause(s)
10 Electricity Carriage Home NG CRG can't be moved to inner diameter.
SERVO LSI Com- CRG can't be moved from inner diameter.
munication Error → Failure on home switch or CRG move mechanism. C
Communication error between microcomputer and SERVO LSI.
11 Electricity Focus Servo NG Focusing not available.
→ Stains on rear side of disc or excessive vibrations on REWRITABLE.
12 Electricity Spindle Lock NG Spindle not locked. Sub-code is strange (not readable).
Subcode NG → Failure on spindle, stains or damages on disc, or excessive vibrations.
A disc not containing CD-R data is found.
Turned over disc are found, though rarely.
CD signal error.
17 Electricity Setup NG AGC protection doesn't work. Focus can be easily lost.
→ Damages or stains on disc, or excessive vibrations on REWRITABLE. D

30 Electricity Search Time Out Failed to reach target address.

→ CRG tracking error or damages on disc.
44 Electricity ALL Skip Skip setting for all track.
(CD-R/RW)
50 Mechanism CD On Mech Error Mechanical error during CD ON.
→ Defective loading motor, mechanical lock and mechanical sensor.
A0 System Power Supply NG Power (VD) is ground faulted.
→ Failure on SW transistor or power supply (failure on connector).
Remarks: Mechanical errors are not displayed (because a CD is turned off in these errors). E
Unreadable TOC does not constitute an error. An intended operation continues in this case.
Upper digits of an error code are subdivided as shown below:
1x: Setup relevant errors, 3x: Search relevant errors, Ax: Other errors.

DEH-1750/XN/GS
5 6 7 8
43
 1 2 3 4

6.4 SYSTEM MICROCOMPUTER TEST PROGRAM

A
- PCL output
In the normal operation mode (with the detachable panel installed, the ACC switched ON, the standby mode cancelled),
shift the TESTIN (Pin 15) terminal to H. The clock signal is output from the PCL terminal (Pin 14). The frequency of the
clock signal is 786.432kHz that is one 16th of the fundamental frequency.The clock signal should be 786.432kHz ± 31.5Hz.
If the clock signal is out of the range, the X’tal (X601) should be replaced with new one.

DEH-1750/XN/GS
44
1 2 3 4
 5 6 7 8

7. GENERAL INFORMATION
7.1 DIAGNOSIS
7.1.1 DISASSEMBLY
A

- Removing the Case (not shown)

1. Remove the Case.

- Removing the CD Mechanism Module (Fig.1) CD Mechanism Module

1 Remove the four screws.

B
Disconnect the connector and then remove the 1
CD Mechanism Module.
1

- Removing the Grille Assy (Fig.1)

2 Release the two latchs and then remove

the Grille Assy.
1
C
2 1 2

Grille Assy Fig.1

- Removing the Tuner Amp Unit (Fig.2)

1 Remove the screw. 2

2
2
D
2 Remove the three screws.

3 Straighten the tabs at three locations

indicated.

4 Remove the screw and then remove

4
the Tuner Amp Unit.
1

3 3 3

Tuner Amp Unit Fig.2

F

DEH-1750/XN/GS
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45
 1 2 3 4

- How to hold the Mechanism Unit

1. Hold the top and bottom frame.
A 2. Do not squeeze top frame's front portion too tight,
because it is fragile.

Do not squeeze.

- Removing the Upper and Lower Frames

1. With a disc clamped, remove the four springs (A),
Upper Frame
the two springs (B), the two springs (C), and the A
four screws. A
2. To remove the upper frame, open it on the fulcrum C
C A.
3. While lifting the carriage mechanism, remove the A
three dampers.
4. With the frames removed, insert the connectors
coming from the main unit and eject the disc.
Caution: Before installing the carriage mechanism in
the frames, be sure to apply some alcohol to the A
dampers and set the mechanism to the clamp mode.

Carriage Mechanism
B C
A
Damper
D Lower Frame
Damper

B Damper

DEH-1750/XN/GS
46
1 2 3 4
 5 6 7 8

- Removing the Pickup Unit

1. Apply shorting solder to the Pickup flexible cable.
Disconnect the cable. A
2. Set the mechanism to the clamp mode.
3. Remove the lead wires from the inner holder.
4. Remove the washer, styling holder, change arm,
and pickup lock arm. Shorting
5. While releasing from the hook of the inner holder, Solder
lift the end of the feed screw.
Caution: In assembling, move the planet gear to the
load/eject position before setting the feed screw
in the inner holder.

Washer C
Pickup Lock Arm

Styling Holder Change Arm

Feed Screw

E
Inner Holder
Planet Gear

DEH-1750/XN/GS
5 6 7 8
47
 1 2 3 4
7.1.2 CONNECTOR FUNCTION DESCRIPTION

1 3 5 7 9 11 13 15
2 4 6 8 10 12 14 16

10A
B

ANTENNA JACK RCA OUTPUT

Pin No. Pin No.

C 1 FR+ 9 -
2 RR+ 10 -
3 FR- 11 B.REMOTE
4 RR- 12 -
5 FL+ 13 -
6 RL+ 14 ACC
7 FL- 15 GND
8 RL- 16 B.UP
D

DEH-1750/XN/GS
48
1 2 3 4
 5 6 7 8

7.2 PARTS
7.2.1 IC
- Pin Functions(PE5449A) A
Pin No. Pin Name I/O Function and Operation
1 MODEL1 Model port 1
2,3 NC Not used
4 AVSS A/D GND
5,6 NC Not used
7 AVREF1 A/D converter reference voltage
8 KYDT I Key data input
9 DPDT O Display data output
10 NC Not used
11 TUNPDI I PLL IC data input
12 TUNPDO O PLL IC data output
13 TUNPCK O PLL IC clock output B
14 PCL O Clock adjustment output
15 TESTIN I Test program mode input
16 XSI I Serial data input
17 XSO O Serial data output
18 XSCK O Serial data clock output
19,20 NC Not used
21 swvdd O Keyboard unit power supply control output
22 ILMPW O Illumination power supply control output
23 NC Not used
24 XRST O CD LSI reset output
25 XA0 O CD LSI identification control signal output
26 XSTB O CD LSI strobe output C
27 CLAMSW Not used
28 CONT O Servo driver power supply control output
29 LOEJ O CD load motor LOAD/EJECT direction exchange output
30 CLCONT O Driver input select output
31 NC Not used
32 DALMON O Stand-by output
33 VSS1 GND
34 BRST Not used
35 BRXEN Not used
36 BRSQ Not used
37 ROMDATA O ROM collection data output (Not used)
D
38 ROMCLK O ROM collection clock output (Not used)
39 ROMCS O ROM collection chip select output (Not used)
40 RECIEVE During RDS data reception
41 VDCONT O VD control output
42 NC Not used
43 SYSPW O System power supply control output
44,45 NC Not used
46 KEY2 Not used
47 NC Not used
48 MUTE O System mute output
49 ANTPW O B. REMOTE output
50 NC Not used E
51 VST O Strobe pulse output for electronic volume
52 VDT O Data output for electronic volume
53 VCK O Clock output for electronic volume
54 NC Not used
55 TUNPCE2 O EEPROM chip enable output 2
56 TUNPCE1 O EEPROM chip enable output 1
57 RDT I RDS demodulation data input (Not used)
58 RDSLK I RDS LK signal input (Not used)
59 RDS57K I RDS 57kHz pulse count input (Not used)
60 reset I Reset input
61 LDET Not used
F

DEH-1750/XN/GS
5 6 7 8
49
 1 2 3 4

Pin No. Pin Name I/O Function and Operation

62 RCK I RDS demodulation clock input (Not used)
A 63 asens I ACC sense input
64 bsens I Back up sense input
65 DSENS I Grille detach sense input
66 INTRQ I SOURCE key sense input
67 VSS0 GND
68 VDD1 Power supply
69 X2 Crystal oscillator connection pin
70 X1 Crystal oscillator connection pin
71 IC(VPP) Connect to GND
72 NC Not used
73 XT1 Connect to GND
74 VDD0 Power supply
B 75 AVDD Positive power supply terminal for analog circuit
76 SL I SD level input from tuner
77 TEMP Connect to VDD
78 VDSENS I VD power supply voltage sense input
79 DISCSENS I CD DISC sense input
80 STRKEY1 NC

* PE5449A IC's marked by * are MOS type.

Be careful in handling them because they are very
61
80

liable to be damaged by electrostatic induction.

1 60
C

20 41
21

40

BA33BC0FP

- Vref
Vref
+

OCP TSD

1 2 3
OUT NC VCC

DEH-1750/XN/GS
50
1 2 3 4
 5 6 7 8

- Pin Functions(PD6340A)
Pin No. Pin Name I/O Function and Operation
1-5 SEG4-0 O LCD segment output A
6-9 COM3-0 O LCD common output
10 VLCD LCD drive power supply
11-14 KST3-0 O Key strobe output
15,16 KDT0,1 I Key data input (analogue input)
17 REW I Remote control reception input
18 DPDT I Display data input
19 NC Not used
20 KYDT O Key data output
21 MODA GND
22 X0 Crystal oscillator connection pin
23 X1 Crystal oscillator connection pin
24 VSS GND B
25,26 KDT2,3 I Key data input
27 NC Not used
28 KST4 O Key strobe output
29-32 NC Not used
33-55 SEG35-13 O LCD segment output
56 VDD Power supply
57-64 SEG12-5 O LCD segment output

* PD6340A
1

16

C
64 17

49 32
48

D
33

DEH-1750/XN/GS
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51
 1 2 3 4

- Pin Functions(UPD63712AGC)
Pin No. Pin Name I/O Function and Operation
1 LD O Output of LD
A
2 PD I Input of PD
3 PN I Assignment of pickup polarity
4 AVDD Power supply for the analog system
5 DGND Ground for digital circuits
6 RFOK O Output of RFOK
7 INTQ O Interruption signals to the external microcomputer
8 rst I Input of reset
9 A0 I Command/Parameter discrimination signal input
10 stb I Data strobe signal input
11 sck I Serial data clock input
12 SO O Serial data output
B 13 SI I Serial data input
14 DVDD Power supply for digital circuits
15 DAVDD Power supply for DAC
16 ROUT O Output of audio for the right channel
17 DAGND GND for DAC
18 REGC Connected to the capacitor for band gap
19 DAGND GND for DAC
20 LOUT O Output of audio for the left channel
21 DAVDD Power supply for DAC
22 XVDD Power supply for the crystal oscillator
23 xtal O Connected to the crystal oscillator
24 XTAL I Connected to the crystal oscillator
C 25 XGND Ground for the crystal oscillator
26 DVDD Power supply for digital circuits
27 C1D1 O Information on error correction
28 C1D2 O Information on error correction
29 C2D1 O Information on error correction
30 C2D2 O Information on error correction
31 C2D3 O Information on error correction
32 LOCK O Output of LOCK
33 MIRR O MIRR signal
34 HOLD O HOLD signal
35 PLCK O Output of PLCK
36 C16M O Output of 16.9344MHz
D 37 DGND Ground for digital circuits
38 TX O DAI output
39 EMPH O Pre-emphasis information output
40 FLAG O The flag for which output sound data cannot be corrected is outputted
41 DVDD Power supply for digital circuits
42 LIMIT I Signal is inputted when the register can be read
43 xtalen I Permission to oscillate
44 DGND Ground for digital circuits
45 DIN I Input of audio data
46 DOUT O Output of audio data
47 SCKIN I Clock input for audio data
E 48 SCKO O Clock output for audio data
49 LRCKIN I Input of LRCK for audio data
50 LRCK O Output LRCK for audio data
51 DVDD Power supply for digital circuits
52 FD+ O Output of focus drive PWM
53 FD- O Output of focus drive PWM
54 TD+ O Output of tracking drive PWM
55 TD- O Output of tracking drive PWM
56 SD+ O Output of thread drive PWM
57 SD- O Output of thread drive PWM
58 MD+ O Output of spindle drive PWM
59 MD- O Output of spindle drive PWM
F 60 DGND Ground for digital circuits

DEH-1750/XN/GS
52
1 2 3 4
 5 6 7 8

Pin No. Pin Name I/O Function and Operation

61 TESTEN I Connected to GND
A
62-66 TEST4-0 I Connected to GND
67 ADGND GND for DAC
68 EFM O Output of EFM signals
69 ASY I Input of asymmetry
70 ADVDD Power supply for DAC
71 RFI I Input of RF
72, 73 EQ2, 1 Equalizer 2, 1
74 RF- I Reversal input of RF
75 RF2- I Reversal input of RF2
76 AGCO O Output of RF
77 AGCI I Input of AGC
78 RFO O Output of RF B
79 ATEST O Analog tests
80 C3T Connection to the capacitor for detecting 3T
81 AGND Ground for the analog system
82 A I Input of A
83 C I Input of C
84 B I Input of B
85 D I Input of D
86 F I Input of F
87 E I Input of E
88 VREFIN I Photo-detector input bias voltage
89 AVDD Power supply for the analog system
90 REFOUT O Output of reference voltage C
91 REFC Connected to the capacitor for output of REFOUT
92 FE- I Reversal input of FE
93 FEO O Output of FE
94 ADCIN I TEST
95 TE- I Reversal input of TE
96 TEO O Output of TE
97 TE2 O TE2
98 TEC I TEC
99 AGND Ground for the analog system
100 PWMSW I Servo PWM mode switching

* UPD63712AGC D
50

26

51 25

E
75 1
100
76

DEH-1750/XN/GS
5 6 7 8
53
 1 2 3 4

- Pin Functions(BA5835FP)
Pin No. Pin Name Function and Operation
1 VR Input pin for reference voltage
A
2 OPIN2(+) Input pin for non-inverting input for CH2 preamplifier
3 OPIN2(-) Input pin for inverting input for CH2 preamplifier
4 OPOUT2 Output pin for CH2 preamplifier
5 OPIN1(+) Input pin for non-inverting input for CH1 preamplifier
6 OPIN1(-) Input pin for inverting input from CH1 preamplifier
7 OPOUT1 Output pin for CH1 preamplifier
8 GND Ground pin
9 MUTE Mute control pin
10 POWVCC1 Power supply pin for CH1, CH2, and CH3 at "Power" stage
11 VO1(-) Driver CH1 - Negative output
12 VO1(+) Driver CH2 - Positive output
B 13 VO2(-) Driver CH2 - Negative output
14 VO2(+) Driver CH2 - Positive output
15 VO3(+) Driver CH2 - Positive output
16 VO3(-) Driver CH2 - Negative output
17 VO4(+) Driver CH4 - Positive output
18 VO4(-) Driver CH4 - Negative output
19 POWVCC2 Power supply pin for CH4 at "Power" stage
20 GND Ground pin
21 CNT Control pin
22 LDIN Loading input
23 OPOUTSL Output pin for preamplifier for thread
24 OPINLSL Input pin for preamplifier for thread
C 25 OPOUT3 CH3 preamplifier output pin
26 OPIN3(-) Input pin for inverting input for CH3 preamplifier
27 OPIN3(+) Input pin for non-inverting input for CH3 preamplifier
28 PREVCC PreVcc

BA5835FP
14 1

D
15 28

NJM2885DL1-33

Thermal
Protection

E
-+

Bandgap
Reference

1 2 3
F
IN GND OUT

DEH-1750/XN/GS
54
1 2 3 4
 5 6 7 8

- FM/AM Tuner Unit

7 6 13 5 10 9 8 11 14 18 19 20 21

CE2

ROM_VDD

SL

DI
CK
CE1

DO
NC

NC

NC

NC

NC
NC
A

IC 3 EEPROM IC 5
←
5.0V 5V 3.3V

OSC LPF

AM ANT FMRF
1 ATT
Rch
24
IC 2
2.5V
FM ANT IC 1
3 3.3V
ATT Lch
23
FMRF MIXER, IF AMP DET, FM MPX

ANT adj
RF adj B

T51 CF52

AUDIOGND

IC 4
OSCGND

VDD_3.3
←
RFGND

3.3V 3.3V 2.5V 2.5V

DGND

VCC
NC

2 12 15 22 16 4 17

No. Symbol I/O Explain

1 AMANT I AM antenna input AM antenna input high impedance AMANT pin is connected with C
an all antenna by way of 4.7µH. (LAU type inductor) A series circuit
including an inductor and a resistor is connected with RF ground for
the countermeasure against the hum of power transmission line.
2 RFGND RF ground Ground of antenna block
3 FMANT IFM antenna input Input of FM antenna 75Ω Surge absorber(DSP-201M-S00B) is necessary.
4 VCC power supply The power supply for analog block. D.C 8.4V ± 0.3V
5 SL O signal level Output of FM/AM signals level
6 CE2 I chip enable-2 Chip enable for EEPROM ”Low” active
7 NC non connection Not used
8 CE1 I chip enable-1 Chip enable for AF•RF ”High” active
9 CK I clock Clock
10 DI I data in Data input D
11 NC non connection Not used
12 OSCGND osc ground Ground of oscillator block
13 ROM_VDD power supply Power supply for EEPROM pin 13 is connected with a power supply of
micro computer.
14 DO O data out Data output
15 DGND digital ground Ground of digital block
16 NC non connection Not used
17 VDD_3.3 power supply The power supply for digital block. 3.3V ± 0.2V
18 NC non connection Not used
19 NC non connection Not used
20 NC non connection Not used
E
21 NC non connection Not used
22 AUDIOGND audio ground Ground of audio block
23 L ch O L channel output FM stereo “L-ch” signal output or AM audio output
24 R ch O R channel output FM stereo “R-ch” signal output or AM audio output

DEH-1750/XN/GS
5 6 7 8
55
 1 2 3 4
7.2.2 DISPLAY

- LCD(CAW1847)
A

DEH-1750/XN/GS
56
1 2 3 4
 5 6 7 8

7.3 OPERATIONAL FLOW CHART

A
Power ON

VDD1=5V
Pin 68

bsens B
Pin 64

bsens=L

asens
Pin 63

asens=L

DSENS
C
Pin 65
DSENS=L

Starts communication with Grille microcomputer.

300ms

swvdd←L
Pin 21
300ms
D
In case of the above signal, the communication
Source keys with Grille microcomputer may fail.
operative If the time interval is not 300msec, the oscillator
may be defective.

Source ON

E
SYSPW←H
Pin 43

Completes power-on operation.(After that, proceed to each source operation.)

DEH-1750/XN/GS
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57
 1 2 3 4

7.4 CLEANING

A
Before shipping out the product, be sure to clean the
following portions by using the prescribed cleaning
tools:
Portions to be cleaned Cleaning tools
CD pickup lenses Cleaning liquid : GEM1004
Cleaning paper : GED-008

DEH-1750/XN/GS
58
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 5 6 7 8

8. OPERATIONS

DEH-1750/XN/GS
5 6 7 8
59
 1 2 3 4

DEH-1750/XN/GS
60
1 2 3 4
 5

5
Connecting cords with RCA
pin plugs (sold separately)

This Product Power amp

(sold separately)
- CONNECTION DIAGRAM

Rear output
Fuse
Antenna jack
Blue/white
To system control terminal of the power amp or
Auto-antenna relay control terminal (max. 300 mA

6
6

System remote control

12 V DC).

+ +
Rear speaker Rear speaker
≠ ≠

DEH-1750/XN/GS
Yellow
To terminal always supplied with Perform these connections when using

7
7

power regardless of ignition the optional amplifier.

switch position.

Red White Gray

To electric terminal controlled by + +
Front speaker Front speaker
ignition switch (12 V DC)
≠ ≠
ON/OFF. White/black Gray/black
Left Right
Green Violet
+ +
Rear speaker Rear speaker
≠ ≠
Green/black Violet/black
Black (ground)
To vehicle (metal) body.
With a 2 speaker system, do not
8

8
connect anything to the speaker leads
that are not connected to speakers.

61
E
A

D
C

F
B
 1 2 3 4

- Jigs List
Name Jig No. Remarks
Test Disc TCD-782 Checking
g the g
grating
g
A
L.P.F. Checking
g the g
grating
g ((Two pieces))

DEH-1750/XN/GS
62
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