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DEH-P250/XM/UC
- CD Player Service Precautions
1. Before disassembling the unit, be sure to turn off the
power. Unplugging and plugging the connectors dur-
ing power-on mode may damage the ICs inside the
unit.
2. To protect the pickup unit from electrostatic dis-
charge during serviving, take an appropriate treat-
ment(shorting-solder) by referring to "the DISAS-
SEMBLY" on page 45.
3. After replacing the pickup unit, be sure to check the
grating.(See p.42.)
CONTENTS
SAFETY INFORMATION ............................................................................................................................................2
1. SPECIFICATIONS .......................................................................................................................................................4
2. EXPLODED VIEWS AND PARTS LIST.......................................................................................................................6
2.1 PACKING...............................................................................................................................................................6
2.2 EXTERIOR.............................................................................................................................................................8
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 PANEL UNIT .......................................................................................................................................................32
4.3 KEYBOARD UNIT ...............................................................................................................................................33
4.4 CD MECHANISM MODULE ...............................................................................................................................34
5. ELECTRICAL PARTS LIST ........................................................................................................................................36
6. ADJUSTMENT .........................................................................................................................................................40
6.1 CD ADJUSTMENT .............................................................................................................................................40
6.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT................................................................42
6.3 ERROR MODE ....................................................................................................................................................44
7. GENERAL INFORMATION .......................................................................................................................................45
7.1 DIAGNOSIS ........................................................................................................................................................45
7.1.1 DISASSEMBLY ..............................................................................................................................................45
7.1.2 CONNECTOR FUNCTION DESCRIPTION ....................................................................................................47
7.2 PARTS .................................................................................................................................................................48
7.2.1 IC ....................................................................................................................................................................48
7.2.2 DISPLAY.........................................................................................................................................................56
7.3 OPERATIONAL FLOW CHART...........................................................................................................................58
7.4 CLEANING ..........................................................................................................................................................59
8. OPERATIONS ...........................................................................................................................................................60
