
3
XV-BD422B
56 7 8
56 7 8
A
B
C
D
E
F
CONTENTS
SAFETY INFORMATION .........................................................................................................................................................2
1. SERVICE PRECAUTIONS....................................................................................................................................................4
1.1 NOTES ON SOLDERING...............................................................................................................................................4
2. SPECIFICATIONS.................................................................................................................................................................5
3. BASIC ITEMS FOR SERVICE..............................................................................................................................................6
3.1 CHECK POINTS AFTER SERVICING...........................................................................................................................6
3.2 JIGS LIST.......................................................................................................................................................................6
3.3 PCB LOCATIONS...........................................................................................................................................................7
4. BLOCK DIAGRAM ................................................................................................................................................................8
4.1 OVERALL WIRING DIAGRAM.......................................................................................................................................8
4.2 OVERALL BLOCK DIAGRAM......................................................................................................................................10
5. DIAGNOSIS ........................................................................................................................................................................12
5.1 TROUBLESHOOTING..................................................................................................................................................12
6. SERVICE MODE.................................................................................................................................................................15
6.1 SERVICE MODE..........................................................................................................................................................15
7. DISASSEMBLY ...................................................................................................................................................................21
8. EACH SETTING AND ADJUSTMENT................................................................................................................................28
8.1 ADJUSTMENT REQUIRED WHEN THE UNIT IS REPAIRED OR REPLACED..........................................................28
8.2 UPDATING OF THE FIRMWARE.................................................................................................................................30
9. EXPLODED VIEWS AND PARTS LIST ..............................................................................................................................32
9.1 PACKING SECTION.....................................................................................................................................................32
9.2 EXTERIOR SECTION..................................................................................................................................................34
10. SCHEMATIC DIAGRAM....................................................................................................................................................38
10.1 MAIN BOARD ASSY (1/13)........................................................................................................................................38
10.2 MAIN BOARD ASSY (2/13)........................................................................................................................................40
10.3 MAIN BOARD ASSY (3/13)........................................................................................................................................42
10.4 MAIN BOARD ASSY (4/13)........................................................................................................................................44
10.5 MAIN BOARD ASSY (5/13)........................................................................................................................................46
10.6 MAIN BOARD ASSY (6/13)........................................................................................................................................48
10.7 MAIN BOARD ASSY (7/13)........................................................................................................................................50
10.8 MAIN BOARD ASSY (8/13)........................................................................................................................................52
10.9 MAIN BOARD ASSY (9/13)........................................................................................................................................54
10.10 MAIN BOARD ASSY (10/13)....................................................................................................................................56
10.11 MAIN BOARD ASSY (11/13).....................................................................................................................................58
10.12 MAIN BOARD ASSY (12/13)....................................................................................................................................60
10.13 MAIN BOARD ASSY (13/13)....................................................................................................................................62
10.14 FRONT BOARD ASSY.............................................................................................................................................64
10.15 AMP BOARD ASSY (1/3).........................................................................................................................................66
10.16 AMP BOARD ASSY (2/3).........................................................................................................................................68
10.17 AMP BOARD ASSY (3/3).........................................................................................................................................70
10.18 AV BOARD ASSY.....................................................................................................................................................72
10.19 SYSTEM POWER SUPPLY ASSY...........................................................................................................................74
11. PCB CONNECTION DIAGRAM........................................................................................................................................76
11.1 MAIN BOARD ASSY...................................................................................................................................................76
11.2 FRONT BOARD ASSY...............................................................................................................................................80
11.3 AMP and AV BOARD ASSYS.....................................................................................................................................82
11.4 SYSTEM POWER SUPPLY ASSY.............................................................................................................................84