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JVC KD-G511

JVC KD-G511
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1-28 (No.MA138)
5.5 Signal processing section
No sound from either
channel.
Compare the L-ch and
R-ch to locate the
defective point.
Is the sound output from
both channels (L, R)?
NO
YES
Is the audio signal
(including sampling
output components)
output to IC581 pins 1
and 7 during playback?
Is the audio signal
output at IC161 pins 15
and 18 during playback?
Normal
NO
NO
YES
YES
NO
Check IC581 and its
peripheral circuits.
YES
NO
Check IC161 and its
peripheral circuits.
Check the power amp.
IC301.
YES
Is 9V present at IC161
pin 32?
Check the vicinity of the
IC901 audio power
supply.
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

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