VSX-C402-S
90
1
2
3
4
1
2
3
4
C
D
F
A
B
E
7.1.6 DSP Trouble shooting
IC8501-pin 21
Yes
No
Is output
signal "L"?
Is the
screw is fastened
at KN8102
(earth point)?
Is connector
inserted tightly
?
• When a sound is not out in the surround mode with the digital signal input.
• Suppose C,R parts to be poor contact and that is not damaged.
• This shows failure analysis of DSP Assy.
Step 1
Replace IC8501.
Replace IC8702.
Replace IC8901.
IC8901
Yes
No
Is 5V
inputting ?
Step 2
IC8902
Check CN8003 and
other assemblies.
IC8702
No
Do perform
3V
→
5V conversion
for pin 17 ?
Step 3
Pin 3
Yes
No
Is 3.3V
outputting ?
Replace IC8902.
Yes
End
Yes
Yes
Replace IC8702.
No
Do perform
3V
→
5V conversion
for pin 15 ?
Pin 5
Replace IC8702.
No
Do perform
3V
→
5V conversion
for pin 13 ?
Pin 7
Yes
Yes
No
Is 1.8V
outputting ?
No
Insert it tightly.
Yes
Yes
No
CN8003
Is connector
inserted tightly
?
No
Insert it tightly.
CN8007
Yes
Is connector
inserted tightly
?
No
Insert it tightly.
Yes
End
Tighten screws.
A
Summary of Contents for VSX-C402-K
Page 31: ...VSX C402 S 31 5 6 7 8 5 6 7 8 C D F A B E D 4 5 D 3 5 AUDIO SIGNAL ROUTE ANALOG A A A A A A ...
Page 35: ...VSX C402 S 35 5 6 7 8 5 6 7 8 C D F A B E J6001 O CN4201 L D 5 5 ...
Page 36: ...VSX C402 S 36 1 2 3 4 1 2 3 4 C D F A B E 3 11 DSP ASSY 1 2 F 1 2 CN1264 D 2 5 ...
Page 38: ...VSX C402 S 38 1 2 3 4 1 2 3 4 C D F A B E 3 12 DSP ASSY 2 2 D1 5 CN9005 F 2 2 ...
Page 39: ...VSX C402 S 39 5 6 7 8 5 6 7 8 C D F A B E F 2 2 DSP ASSY AWX8241 F 2 2 ...
Page 45: ...VSX C402 S 45 5 6 7 8 5 6 7 8 C D F A B E ...
Page 94: ...VSX C402 S 94 1 2 3 4 1 2 3 4 C D F A B E DSP WIRING DIAGRAM ...
