4
1
234
12
34
F
E
D
C
B
A
DEH-P4500R/XM/EW
- 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 43.
3. After replacing the pickup unit, be sure to check the
grating.(See p.40.)
CONTENTS
SAFETY INFORMATION ............................................................................................................................................2
1. SPECIFICATIONS .......................................................................................................................................................5
2. EXPLODED VIEWS AND PARTS LIST.......................................................................................................................6
2.1 PACKING...............................................................................................................................................................6
2.2 EXTERIOR.............................................................................................................................................................8
2.3 CD MECHANISM MODULE ...............................................................................................................................10
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ...................................................................................................12
3.1 BLOCK DIAGRAM ..............................................................................................................................................12
3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE) ........................................................................................14
3.3 KEYBOARD UNIT ...............................................................................................................................................20
3.4 CD MECHANISM MODULE ...............................................................................................................................22
4. PCB CONNECTION DIAGRAM ................................................................................................................................26
4.1 TUNER AMP UNIT .............................................................................................................................................26
4.2 PANEL UNIT .......................................................................................................................................................30
4.3 KEYBOARD UNIT ...............................................................................................................................................31
4.4 CD MECHANISM MODULE ...............................................................................................................................32
5. ELECTRICAL PARTS LIST ........................................................................................................................................34
6. ADJUSTMENT .........................................................................................................................................................38
6.1 CD ADJUSTMENT .............................................................................................................................................38
6.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT................................................................40
6.3 ERROR MODE ....................................................................................................................................................42
7. GENERAL INFORMATION .......................................................................................................................................43
7.1 DIAGNOSIS ........................................................................................................................................................43
7.1.1 DISASSEMBLY ..............................................................................................................................................43
7.1.2 CONNECTOR FUNCTION DESCRIPTION ....................................................................................................45
7.2 PARTS .................................................................................................................................................................46
7.2.1 IC ....................................................................................................................................................................46
7.2.2 DISPLAY.........................................................................................................................................................54
7.3 OPERATIONAL FLOW CHART...........................................................................................................................55
7.4 CLEANING ..........................................................................................................................................................56
8. OPERATIONS ...........................................................................................................................................................57