3
5
6
7
8
F
E
D
C
B
A
5
6
7
8
DEH-P450MP/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 55.
3. After replacing the pickup unit, be sure to check the
grating.(See p.52.)
CONTENTS
SAFETY INFORMATION ............................................................................................................................................2
1. SPECIFICATIONS .......................................................................................................................................................4
2. EXPLODED VIEWS AND PARTS LIST.......................................................................................................................6
2.1 PACKING...............................................................................................................................................................6
2.2 EXTERIOR (DEH-P450MP, P4500MP)..................................................................................................................8
2.3 EXTERIOR (DEH-P3550MP) ...............................................................................................................................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
3.4 CD MECHANISM MODULE ...............................................................................................................................26
4. PCB CONNECTION DIAGRAM ................................................................................................................................36
4.1 TUNER AMP UNIT .............................................................................................................................................36
4.2 PANEL UNIT .......................................................................................................................................................40
4.3 KEYBOARD UNIT ...............................................................................................................................................41
4.4 CD MECHANISM MODULE ...............................................................................................................................42
5. ELECTRICAL PARTS LIST ........................................................................................................................................44
6. ADJUSTMENT .........................................................................................................................................................49
6.1 JIG CONNECTION DIAGRAM ...........................................................................................................................49
6.2 CD ADJUSTMENT .............................................................................................................................................50
6.3 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT................................................................52
6.4 ERROR MODE ....................................................................................................................................................54
7. GENERAL INFORMATION .......................................................................................................................................55
7.1 DIAGNOSIS ........................................................................................................................................................55
7.1.1 DISASSEMBLY ..............................................................................................................................................55
7.1.2 CONNECTOR FUNCTION DESCRIPTION ....................................................................................................57
7.2 PARTS .................................................................................................................................................................59
7.2.1 IC ....................................................................................................................................................................59
7.2.2 DISPLAY.........................................................................................................................................................68
7.3 OPERATIONAL FLOW CHART...........................................................................................................................70
7.4 CLEANING ..........................................................................................................................................................71
8. OPERATIONS ...........................................................................................................................................................72
