4
VSX-
8
21-K
1
2
3
4
A
B
C
D
E
F
1
2
3
4
CONTENTS
SAFETY INFORMATION ..........................................................................................................................................................2
1. SERVICE PRECAUTIONS ....................................................................................................................................................5
1.1 NOTES ON SOLDERING ...............................................................................................................................................5
1.2 SERVICE NOTICE ..........................................................................................................................................................5
2. SPECIFICATIONS .................................................................................................................................................................6
3. BASIC ITEMS FOR SERVICE...............................................................................................................................................9
3.1 CHECK POINTS AFTER SERVICING............................................................................................................................9
3.2 JIGS LIST........................................................................................................................................................................9
3.3 PCB LOCATIONS .........................................................................................................................................................10
4. BLOCK DIAGRAM ...............................................................................................................................................................14
4.1 OVERALL
W
IRING DIAGRAM......................................................................................................................................14
4.2 AUDIO BLOCK DIAGRAM (for VSX-
8
21-K, VSX-521-K)..............................................................................................16
4.3 AUDIO BLOCK DIAGRAM (for VSX-921-K)..................................................................................................................1
8
4.4 D-MAIN BLOCK DIAGRAM (for VSX-
8
21-K, VSX-521-K) ............................................................................................20
4.5 D-MAIN BLOCK DIAGRAM (for VSX-921-K) ................................................................................................................22
4.6 VIDEO BLOCK DIAGRAM ............................................................................................................................................24
4.7 PO
W
ER SUPPLY and MAIN UCOM BLOCK DIAGRAM ..............................................................................................26
5. DIAGNOSIS .........................................................................................................................................................................2
8
5.1 TROUBLESHOOTING ..................................................................................................................................................2
8
5.2 ADAPTER ERROR MESSAGE.....................................................................................................................................44
5.3 USB / iPod ERROR MESSAGE ....................................................................................................................................45
5.4 DETECTION CIRCUIT..................................................................................................................................................46
6. SERVICE MODE .................................................................................................................................................................4
8
6.1 SERVICE MODE...........................................................................................................................................................4
8
7. DISASSEMBLY ....................................................................................................................................................................52
8
. EACH SETTING AND ADJUSTMENT ................................................................................................................................62
8
.1 ADJUSTMENT REQUIRED
W
HEN THE UNIT IS REPAIRED OR REPLACED ..........................................................62
8
.2 UPDATING OF THE FIRM
W
ARE..................................................................................................................................63
8
.3 IDLE CURRENT ADJUSTMENT ..................................................................................................................................67
9. EXPLODED VIE
W
S AND PARTS LIST ...............................................................................................................................70
9.1 PACKING SECTION......................................................................................................................................................70
10. SCHEMATIC DIAGRAM ....................................................................................................................................................
8
0
10.1 AUDIO ASSY ..............................................................................................................................................................
8
0
10.2 AMP ASSY (1/2) (for VSX-921-K) ...............................................................................................................................
8
2
10.3 AMP ASSY (2/2) (for VSX-921-K) ...............................................................................................................................
8
4
10.4 AMP ASSY (1/2) (for VSX-
8
21-K, VSX-521-K) ...........................................................................................................
8
6
10.5 AMP ASSY (2/2) (for VSX-
8
21-K, VSX-521-K) ...........................................................................................................
88
10.6 MAIN ASSY.................................................................................................................................................................90
10.7 SUB
W
OOFER, HEADPHONE, MIC, GUIDE L, R,
W
IRE GUIDE A and B ASSYS ....................................................92
10.
8
VIDEO ASSY ..............................................................................................................................................................94
10.9 F-VIDEO, FRONT and PO
W
ER ASSYS .....................................................................................................................96
10.10 CPU, BRIDGE A and B ASSYS ................................................................................................................................9
8
10.11 STANDBY ASSY .....................................................................................................................................................100
10.12 D-MAIN ASSY (1/4) ................................................................................................................................................102
10.13 D-MAIN ASSY (2/4) ................................................................................................................................................104
10.14 D-MAIN ASSY (3/4) ................................................................................................................................................106
10.15 D-MAIN ASSY (4/4) ................................................................................................................................................10
8
10.16 USB ASSY (VSX-
8
21-K, VSX-921-K only) .............................................................................................................110
10.17 BT ASSY .................................................................................................................................................................112
11. PCB CONNECTION DIAGRAM ......................................................................................................................................114
11.1 AUDIO ASSY ............................................................................................................................................................114
11.2 AMP ASSY (for VSX-921-K) .....................................................................................................................................116
11.3 AMP ASSY (for VSX-
8
21-K, VSX-521-K) .................................................................................................................11
8
11.4 MAIN ASSY...............................................................................................................................................................120
11.5 SUB
W
OOFER, HEADPHONE and MIC ASSYS ......................................................................................................124
11.6 GUIDE L, R,
W
IRE GUIDE A and B ASSYS.............................................................................................................126
11.7 VIDEO ASSY ............................................................................................................................................................12
8
11.
8
F-VIDEO, FRONT and PO
W
ER ASSYS ...................................................................................................................130
11.9 CPU ASSY ................................................................................................................................................................134
11.10 BRIDGE A and B ASSYS........................................................................................................................................13
8
11.11 STANDBY ASSY .....................................................................................................................................................139
11.12 D-MAIN ASSY.........................................................................................................................................................140
11.13 USB ASSY (VSX-
8
21-K, VSX-921-K only) .............................................................................................................144
11.14 BT ASSY .................................................................................................................................................................145
12. PCB PARTS LIST ............................................................................................................................................................146
Summary of Contents for VSX-521-K
Page 13: ...13 VSX 821 K 5 6 7 8 5 6 7 8 A B C D E F ...
Page 17: ...17 VSX 821 K 5 6 7 8 5 6 7 8 A B C D E F D MAIN ASSY C AMP ASSY D MAIN ASSY E SUBWOOFER ASSY ...
Page 21: ...21 VSX 821 K 5 6 7 8 5 6 7 8 A B C D E F ...
Page 22: ...22 VSX 821 K 1 2 3 4 A B C D E F 1 2 3 4 4 5 D MAIN BLOCK DIAGRAM for VSX 921 K T D MAIN ASSY ...
Page 23: ...23 VSX 821 K 5 6 7 8 5 6 7 8 A B C D E F ...
Page 27: ...27 VSX 821 K 5 6 7 8 5 6 7 8 A B C D E F only P CPU ASSY Not used ...
