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VSX-918V-K
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CONTENTS
SAFETY INFORMATION ..........................................................................................................................................................2
1. SERVICE PRECAUTIONS ....................................................................................................................................................5
1.1 NOTES ON SOLDERING ...............................................................................................................................................5
1.2 AMPLIFIER FAILURE DIAGNOSIS FLOW CHART........................................................................................................5
2. SPECIFICATIONS .................................................................................................................................................................6
2.1 SPECIFICATIONS...........................................................................................................................................................6
2.2 PANEL FACILITIES .........................................................................................................................................................7
3. BASIC ITEMS FOR SERVICE.............................................................................................................................................13
3.1 CHECK POINTS AFTER SERVICING..........................................................................................................................13
3.2 JIGS LIST .....................................................................................................................................................................13
3.3 PCB LOCATIONS .........................................................................................................................................................14
4. BLOCK BIAGRAM ...............................................................................................................................................................16
4.1 OVERALL WIRING CONNECTION DIAGRAM (VSX-918V) ........................................................................................16
4.2 OVERALL WIRING CONNECTION DIAGRAM (VSX-818V) ........................................................................................18
4.3 BLOCK DIAGRAM (VSX-918V) ....................................................................................................................................20
4.4 BLOCK DIAGRAM (VSX-818V) ....................................................................................................................................22
4.5 DSP BLOCK DIAGRAM................................................................................................................................................24
4.6 HDMI BLOCK DIAGRAM ..............................................................................................................................................25
4.7 USB (iPod) BLOCK DIAGRAM .....................................................................................................................................26
5. DIAGNOSIS.........................................................................................................................................................................27
5.1 DIAGNOSIS FLOWCHART...........................................................................................................................................27
5.2 DETECTION CIRCUIT..................................................................................................................................................48
5.3 AMPLIFIER SYSTEM PROTECTION OPERATION SPECIFICATION .........................................................................50
6. SERVICE MODE .................................................................................................................................................................51
7. DISASSEMBLY....................................................................................................................................................................52
8. EACH SETTING AND ADJUSTMENT ................................................................................................................................57
8.1 HOW TO UPDATE FIRMWARE ....................................................................................................................................57
9. EXPLODED VIEWS AND PARTS LIST...............................................................................................................................58
9.1 PACKING ......................................................................................................................................................................58
9.2 EXTERIOR SECTION...................................................................................................................................................60
9.3 REAR PANEL SECTION...............................................................................................................................................62
9.4 FRONT PANEL SECTION ............................................................................................................................................64
10. SCHEMATIC DIAGRAM ....................................................................................................................................................66
10.1 MAIN ASSY (1/3) ........................................................................................................................................................66
10.2 MAIN ASSY (2/3) ........................................................................................................................................................68
10.3 MAIN ASSY (3/3) ........................................................................................................................................................70
10.4 DSP & USB ASSY (1/4) ..............................................................................................................................................72
10.5 DSP & USB ASSY (2/4) ..............................................................................................................................................74
10.6 DSP & USB ASSY (3/4) ..............................................................................................................................................76
10.7 DSP & USB ASSY (4/4) ..............................................................................................................................................78
10.8 POWER PACK (1/2) and TRANS2 ASSYS.................................................................................................................80
10.9 POWER PACK ASSY (2/2) .........................................................................................................................................82
10.10 COMPONENT VIDEO, 5.1CH INPUT and TRANS3 ASSYS ...................................................................................84
10.11 FRONT DISPLAY, ROTARY ENCODER, POWER KEY and JOG ASSYS ...............................................................86
10.12 DIGITAL INPUT, REGULATOR and HEAD PHONE ASSYS.....................................................................................88
10.13 VIDEO, PRIMARY, FRONT VIDEO and TRANS1 ASSYS........................................................................................90
10.14 FRONT IN ASSY.......................................................................................................................................................92
10.15 SIRIUS ASSY ...........................................................................................................................................................94
10.16 HDMI & DSP & USB ASSY (1/5) ..............................................................................................................................96
10.17 HDMI & DSP & USB ASSY (2/5) ..............................................................................................................................98
10.18 HDMI & DSP & USB ASSY (3/5) ............................................................................................................................100
10.19 HDMI & DSP & USB ASSY (4/5) ............................................................................................................................102
10.20 HDMI & DSP & USB ASSY (5/5) ............................................................................................................................104
11. PCB CONNECTION DIAGRAM ......................................................................................................................................106
11.1 SIRIUS ASSY ...........................................................................................................................................................107
11.2 DSP & USB and HDMI ASSYS.................................................................................................................................108
11.3 MAIN ASSY ..............................................................................................................................................................112
11.4 POWER PACK ASSY................................................................................................................................................116
11.5 TRANS2 and TRANS3 ASSYS.................................................................................................................................120
11.6 COMPONENT VIDEO ASSY ....................................................................................................................................122
11.7 5.1CH INPUT and HEAD PHONE ASSYS ...............................................................................................................123
11.8 FRONT DISPLAY, ROTARY ENCODER, POWER KEY and JOG ASSYS ...............................................................124
11.9 DIGITAL INPUT and FRONT VIDEO ASSYS ...........................................................................................................128
11.10 REGULATOR ASSY................................................................................................................................................129
11.11 VIDEO ASSY ..........................................................................................................................................................130
11.12 FRONT IN ASSY.....................................................................................................................................................131
11.13 TRANS1 and PRIMARY ASSYS.............................................................................................................................132
11.14 HDMI & DSP & USB ASSY.....................................................................................................................................134
12. ELECTRICAL PARTS LIST .............................................................................................................................................138