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VSX-LX52
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CONTENTS
SAFETY INFORMATION ..........................................................................................................................................................2
1. SERVICE PRECAUTIONS ....................................................................................................................................................6
1.1 NOTES ON SOLDERING ...............................................................................................................................................6
1.2 NOTES ON REPLACING ................................................................................................................................................6
1.3 CAUTION ........................................................................................................................................................................6
2. SPECIFICATIONS .................................................................................................................................................................7
2.1 SPECIFICATIONS...........................................................................................................................................................7
2.2 PANEL FACILITIES .........................................................................................................................................................8
3. BASIC ITEMS FOR SERVICE.............................................................................................................................................13
3.1 CHECK POINTS AFTER SERVICING..........................................................................................................................13
3.2 PCB LOCATIONS .........................................................................................................................................................14
3.3 JIGS LIST......................................................................................................................................................................15
4. BLOCK DIAGRAM...............................................................................................................................................................16
4.1 OVERALL WIRING DIAGRAM......................................................................................................................................16
4.2 BLOCK DIAGRAM FOR DIGITAL AUDIO BLOCK........................................................................................................18
4.3 BLOCK DIAGRAM FOR ANALOG AUDIO BLOCK ......................................................................................................20
4.4 BLOCK DIAGRAM FOR DIGITAL VIDEO BLOCK........................................................................................................21
4.5 BLOCK DIAGRAM FOR ANALOG VIDEO BLOCK (1/2) ..............................................................................................22
4.6 BLOCK DIAGRAM FOR ANALOG VIDEO BLOCK (2/2) ..............................................................................................24
4.7 BLOCK DIAGRAM FOR U-COM BLOCK .....................................................................................................................25
4.8 BLOCK DIAGRAM FOR POWER BLOCK ....................................................................................................................26
5. DIAGNOSIS .........................................................................................................................................................................28
5.1 DIAGNOSIS FLOWCHART...........................................................................................................................................28
5.2 CIRCUIT DESCRIPTION ..............................................................................................................................................45
6. SERVICE MODE .................................................................................................................................................................50
6.1 TEST MODE .................................................................................................................................................................50
7. DISASSEMBLY....................................................................................................................................................................52
8. EACH SETTING AND ADJUSTMENT ................................................................................................................................60
8.1 HOW TO UPDATE FIRMWARE ....................................................................................................................................60
9. EXPLODED VIEWS AND PARTS LIST ...............................................................................................................................64
9.1 PACKING SECTION......................................................................................................................................................64
9.2 EXTERIOR SECTION...................................................................................................................................................66
9.3 REAR SECTION ...........................................................................................................................................................68
9.4 FRONT SECTION .........................................................................................................................................................70
10. SCHEMATIC DIAGRAM ....................................................................................................................................................72
10.1 AUDIO ASSY ..............................................................................................................................................................72
10.2 COMPOSITE (1/2) and V-BRIDGE ASSYS ................................................................................................................74
10.3 COMPOSITE ASSY (2/2)............................................................................................................................................76
10.4 COMPONENT ASSY (1/2)..........................................................................................................................................78
10.5 COMPONENT ASSY (2/2)..........................................................................................................................................80
10.6 DIGITAL MAIN ASSY (1/11)........................................................................................................................................82
10.7 DIGITAL MAIN ASSY (2/11)........................................................................................................................................88
10.8 DIGITAL MAIN ASSY (3/11)........................................................................................................................................90
10.9 DIGITAL MAIN ASSY (4/11)........................................................................................................................................92
10.10 DIGITAL MAIN ASSY (5/11)......................................................................................................................................94
10.11 DIGITAL MAIN ASSY (6/11)......................................................................................................................................96
10.12 DIGITAL MAIN ASSY (7/11)......................................................................................................................................98
10.13 DIGITAL MAIN ASSY (8/11)....................................................................................................................................100
10.14 DIGITAL MAIN ASSY (9/11)....................................................................................................................................102
10.15 DIGITAL MAIN ASSY (10/11)..................................................................................................................................104
10.16 DIGITAL MAIN ASSY (11/11)..................................................................................................................................106
10.17 FRONT MIC & VIDEO ASSY ..................................................................................................................................108
10.18 FRONT HDMI & USB ASSY ...................................................................................................................................110
10.19 POWER AMP ASSY (1/2) .......................................................................................................................................112
10.20 POWER AMP ASSY (2/2) .......................................................................................................................................114
10.21 PRESTAGE ASSY...................................................................................................................................................116
10.22 DISPLAY ASSY.......................................................................................................................................................118
10.23 PRIMARY, UNREG and XM REGULATOR ASSYS ................................................................................................120
10.24 REGULATOR ASSY................................................................................................................................................122
10.25 POWER SW, ENCODER, HEAD PHONE and DIODE ASSYS ..............................................................................124
10.26 BRIDGE 1 and 2 ASSYS ........................................................................................................................................125
10.27 POSI 1-3, BIND L FRONT and BACK, BIND R FRONT and BACK ASSYS...........................................................126
10.28 BINDER and DISP-FFC GUARD ASSYS ...............................................................................................................127
11. PCB CONNECTION DIAGRAM ......................................................................................................................................128
11.1 AUDIO ASSY ............................................................................................................................................................128
