Dsp Trouble Shooting - Pioneer XV-HTD330 Service Manual

1

7.1.9 DSP TROUBLE SHOOTING

QQ
3 7 63 1515 0
• When a sound is not out in the surround mode with the digital signal input.
• Suppose CR to be poor contact and that is not damaged.
• This shows failure analysis of DSP Assy.
A
Step 1
IC8501-pin 21
Is output
signal "L"?
Yes
JA8103
B
Does the
COAX terminal install
with screws in the
rear panel
?
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
www
F
106
1
http://www.xiaoyu163.com
2
No
Replace IC8501.
No
Tighten screws.
No
Insert it tightly.
No
Insert it tightly.
No
Insert it tightly.
x ao
. i
2
http://www.xiaoyu163.com
3
Step 2
IC8901
Is 5V
inputting ?
Yes
Is 3.3V
outputting ?
Yes
IC8902
Yes
Is 1.8V
outputting ?
Yes
End
Q Q
Step 3
3 6 7
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
y
A
XV-HTD330
3
4
2 9 9 4
8
No
Check CN8003 and
other assemblies.
No
Replace IC8901.
No
Replace IC8902.
1 3 1 5 0 5 8 2 9
No
Replace IC8702.
No
Replace IC8702.
No
Replace IC8702.
m
co
.
4
2 8
9 9
9 4 2 8 9 9