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Service
Manual DEH-P750MP/XN/UC
ORDER NO.
CRT3050
MULTI-CD CONTROL HIGH POWER CD/MP3/WMA PLAYER WITH FM/AM TUNER



DEH-P750MP
DEH-P7500MP XN/UC
XN/UC



DEH-P7550MP XN/ES



- This service manual should be used together with the following manual(s):
Model No. Order No. Mech. Module Remarks
CX-3057 CRT3026 S10MP3 CD Mech. Module:Circuit Description, Mech.Description, Disassembly




For details, refer to "Important symbols for good services".



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

C PIONEER CORPORATION 2003 K-ZZD. APR. 2003 Printed in Japan
1 2 3 4




A [ Important symbols for good services ]
In this manual, the symbols shown-below indicate that adjustments, settings or cleaning should be made securely.
When you find the procedures bearing any of the symbols, be sure to fulfill them:
1. Product safety
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 described in this manual.


2. Adjustments
To keep the original performances of the product, optimum adjustments or specification confirmation is indispensable.
In accordance with the procedures or instructions described in this manual, adjustments should be performed.

B
3. Cleaning
For optical pickups, tape-deck heads, lenses and mirrors used in projection monitors, and other parts requiring cleaning,
proper cleaning should be performed to restore their performances.


4. Shipping mode and shipping screws

To protect the product from damages or failures that may be caused during transit, the shipping mode should be set or
the shipping screws should be installed before shipping out in accordance with this manual, if necessary.


5. Lubricants, glues, and replacement parts
C Appropriately applying grease or glue can maintain the product performances. But improper lubrication or applying
glue may lead to failures or troubles in the product. By following the instructions in this manual, be sure to apply the
prescribed grease or glue to proper portions by the appropriate amount.For replacement parts or tools, the prescribed
ones should be used.



SAFETY INFORMATION
CAUTION

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 repair
D 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.

WARNING

This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of
California to cause cancer, birth defects or other reproductive harm.
Health & Safety Code Section 25249.6 - Proposition 65

E
- CD Section Precaution
1. 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.
2. To protect the pickup unit from electrostatic discharge
during servicing, take an appropriate treatment
(shorting-solder) by referring to "the DISASSEMBLY"
on page 64.
3. After replacing the pickup unit, be sure to check the
grating. (See p.60.)
F




2 DEH-P750MP/XN/UC
1 2 3 4
5 6 7 8




CONTENTS
SAFETY INFORMATION ......................................................................................................................................................2 A
1. SPECIFICATIONS .................................................................................................................................................................4
2. EXPLODED VIEWS AND PARTS LIST ................................................................................................................................6
2.1 PACKING..........................................................................................................................................................................6
2.2 EXTERIOR(DEH-P750MP/XN/UC,DEH-P7500MP/XN/UC).............................................................................................8
2.3 EXTERIOR(DEH-P7550MP/XN/ES) ...............................................................................................................................12
2.4 CD MECHANISM MODULE ..........................................................................................................................................14
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM.............................................................................................................16
3.1 BLOCK DIAGRAM .........................................................................................................................................................16
3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE) ...................................................................................................18
3.3 KEYBOARD UNIT ..........................................................................................................................................................24 B

3.4 CD MECHANISM MODULE(GUIDE PAGE)..................................................................................................................26
4. PCB CONNECTION DIAGRAM..........................................................................................................................................36
4.1 TUNER AMP UNIT ........................................................................................................................................................36
4.2 KEYBOARD UNIT ..........................................................................................................................................................40
4.3 PANEL UNIT ..................................................................................................................................................................41
4.4 CD MECHANISM MODULE ..........................................................................................................................................42
5. ELECTRICAL PARTS LIST..................................................................................................................................................44
6. ADJUSTMENT ...................................................................................................................................................................56
6.1 JIG CONNECTION DIAGRAM ......................................................................................................................................56 C
6.2 OEL UNIT ADJUSTMENT.............................................................................................................................................57
6.3 SYSTEM MICROCOMPUTER TEST PROGRAM..........................................................................................................58
6.4 CD ADJUSTMENT ........................................................................................................................................................58
6.5 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT...........................................................................60
6.6 ERROR MODE ...............................................................................................................................................................62
6.7 OEL SCREENSAVER STUDIO IKA TO LKD APPLICATION : GGV1131 ......................................................................63
7. GENERAL INFORMATION.................................................................................................................................................64
7.1 DIAGNOSIS ...................................................................................................................................................................64
7.1.1 DISASSEMBLY .......................................................................................................................................................64
D
7.1.2 CONNECTOR FUNCTION DESCRIPTION .............................................................................................................67
7.2 IC ....................................................................................................................................................................................68
7.3 OPERATIONAL FLOW CHART ......................................................................................................................................81
7.4 CLEANING .....................................................................................................................................................................82
8. OPERATIONS .....................................................................................................................................................................83




E




F




DEH-P750MP/XN/UC 3
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1. SPECIFICATIONS
- DEH-P750MP/XN/UC, DEH-P7500MP/XN/UC
A




B




C




D




E




F




4 DEH-P750MP/XN/UC
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- DEH-P7550MP/XN/ES
A




B




C




D




E




F




DEH-P750MP/XN/UC 5
5 6 7 8
1 2 3 4



2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
A




B




C




NOTE:
- Parts marked by "*" are generally unavailable because they are not in our Master Spare Parts List.
D - Screws adjacent to mark on the product are used for disassembly.
- For the applying amount of lubricants or glue, follow the instructions in this manual.
( In the case of no amount instructions, apply as you think it appropriate.)
(1) PACKING SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
1 Polyethylene Bag See Contrast table(2) 16 Remote Control Unit See Contrast table(2)
2 Cord Assy CDE7154 * 17 Battery See Contrast table(2)
3 Accessory Assy See Contrast table(2) 18 Carton See Contrast table(2)
4 Spring CBH1650 19 Contain Box See Contrast table(2)
5 Screw Assy See Contrast table(2) 20 Protector CHP2663
E
6 Fixing Screw See Contrast table(2) 21 Protector CHP2664
7 Screw CBA1650 22-1 Owner's Manual See Contrast table(2)
* 8 Polyethylene Bag CEG-127 22-2 Owner's Manual See Contrast table(2)
9 Screw CRZ50P090FTC 22-3 Installation Manual See Contrast table(2)
10 Screw TRZ50P080FTC * 22-4 Caution Card See Contrast table(2)

* 11 Polyethylene Bag CEG-158 * 22-5 Card See Contrast table(2)
12 Handle CNC5395 * 22-6 Caution Card CRP1207
13 Holder See Contrast table(2) * 22-7 Warranty Card See Contrast table(2)
14 Holder See Contrast table(2) 23 Case Assy CXB3520
F
15 Bush CNV3930




6 DEH-P750MP/XN/UC
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(2) CONTRAST TABLE
A
DEH-P750MP/XN/UC, DEH-P7500MP/XN/UC and DEH-P7550MP/XN/ES are constructed the same except
for the following:

Part No.
Mark No. Symbol and Description DEH-P750MP/XN/UC DEH-P7500MP/XN/UC DEH-P7550MP/XN/ES
1 Polyethylene Bag CEG1173 CEG1173 CEG-162
3 Accessory Assy CEA3376 CEA3376 CEA3439
5 Screw Assy CEA3848 CEA3848 CEA3849
6 Fixing Screw BPZ20P060FZK BPZ20P060FZK Not used
13 Holder CND1249 CND1249 Not used
B
14 Holder CND1250 CND1250 Not used
16 Remote Cotrol Unit CXC1361 CXC1361 CXC1265
* 17 Battery Not used Not used CEX1065
18 Carton CHG5089 CHG5088 CHG5087
19 Contain Box CHL5089 CHL5088 CHL5087

22-1 Owner's Manual CRD3767 CRD3769 CRD3771
22-2 Owner's Manual Not used Not used CRD3772
22-3 Installation Manual CRD3768 CRD3770 CRD3773
* 22-4 Caution Card Not used Not used CRP1216

* 22-5 Card Not used ARY1048 Not used C
* 22-7 Warranty Card CRY1070 Not used Not used


- Owner's Manual, Installation Manual
Model Part No. Language
DEH-P750MP/XN/UC CRD3767 English, Spanish
CRD3768 English, Spanish
DEH-P7500MP/XN/UC CRD3769 English, Spanish
CRD3770 English, Spanish
DEH-P7550MP/XN/ES CRD3771 English, Spanish, Portuguese(B)
CRD3772 Traditional chinese, Arabic
CRD3773 English, Spanish, Portuguese(B), Traditional chinese, Arabic D




E




F




DEH-P750MP/XN/UC 7
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2.2 EXTERIOR(DEH-P750MP/XN/UC,DEH-P7500MP/XN/UC)

A 96 10




97




9




B

2 2
8

2
91 2
67 5
67
90 67

85
80 A
83 82 67
C 86 6
81 79
84 7
88 82 B
69 B C
14
34 19
72
71
75 66
76 74 17 93 31 95
32
68 70
87 78 94
77
33 23 18
65 26 21
89 12
93
73 20 27 22 11
D
C
25 30
A
37

36
28
29 35
20

48 92
59 16
D
58
E 43
60

41 13
47 63
64 52 54 61

56 4
50 51 3 B
42 45
49
15 44 4
40 53
A
39 4
1

40 62

F 55
46
40 38
57

1
8 DEH-P750MP/XN/UC
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(1) EXTERIOR(DEH-P750MP/XN/UC, DEH-P7500MP/XN/UC) SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
A
1 Screw BMZ30P040FZK 51 Gear CNV5997
2 Screw BSZ26P060FTC 52 Pin CNV6486
3 Screw BSZ30P060FTC 53 Lighting Conductor CNV6487
4 Screw BSZ30P200FTC 54 Arm CNV7400
5 Cord Assy CDE7129 55 Arm CNV7401

6 Flat Cable CDE7149 56 Arm CNV7402
7 Cord Assy CDE7150 57 Arm CNV7403
8 Cord Assy CDE7154 58 Panel Unit CWM8758
9 Case CNB2870 59 Socket(CN1950) CKS3550
10 Holder CNC8659 60 Connector(CN1951) CKS4462
B
11 Earth Plate CNC8915 61 Holder Unit CXB9501
12 Cushion CNM4870 62 Holder Unit CXB9502
13 Insulator CNM7935 63 Damper Unit CXB9503
14 Insulator CNM8174 64 Panel Unit(Service) CXX1691
15 Panel See Contrast table(2) 65 Detach Grille Assy See Contrast table(2)

16 Tuner Amp Unit See Contrast table(2) 66 Screw BPZ20P060FTC
17 Screw ASZ26P060FTC 67 Screw BPZ20P100FZK
18 Screw BPZ26P080FTC 68 Knob See Contrast table(2)
19 Screw BSZ26P160FTC 69 Button(CLK) CAC7751
20 Clamper CEF1035 70 Button(OPEN) CAC7728
C

21 Fuse(10A) CEK1208 71 Button(TEXT/SCRL) CAC7737
22 Pin Jack(CN361) CKB1051 72 Button(AUDIO/FUNC) CAC7738
23 Plug(CN981) CKM1376 73 Button(1-6) CAC7750
24