Dsp Trouble Shooting - Pioneer XV-DV430 Service Manual

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7.1.9 DSP TROUBLE SHOOTING

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• 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.
A
• This shows failure analysis of DSP Assy.
Step 1
IC8501-pin 21
Is output
signal "L"?
Yes
KN8102
B
Is the
screw is fastened
at KN8102
(earth point)?
Yes
CN8003
Is connector
inserted tightly
C
?
Yes
CN8007
TE
L 13942296513
Is connector
inserted tightly
?
Yes
CN8011
D
Is connector
inserted tightly
?
Yes
End
E
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No
Replace IC8501.
No
Tighten screws.
No
Insert it tightly.
No
Insert it tightly.
No
Insert it tightly.
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y
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Step 2
IC8901
Is 5V
inputting ?
Yes
Is 3.3V
outputting ?
Yes
IC8902
Yes
Is 1.8V
outputting ?
Yes
End
Q Q
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Step 3
IC8702
Pin 3
Do perform
3V→5V conversion
for pin 17 ?
Yes
Pin 5
Do perform
3V→5V conversion
for pin 15 ?
Yes
Pin 7
Do perform
3V→5V conversion
for pin 13 ?
Yes
u163
A
.
XV-DV430
3
4
2 9 9 4 2 8
No Check CN8003 and
other assemblies.
No
Replace IC8901.
No
Replace IC8902.
1 5 0 5 8 2 9 9 4
No
Replace IC8702.
No
Replace IC8702.
No
Replace IC8702.
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co
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9 9
2 8 9 9