JVC KD-G515 Service Manual page 28

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5.5 Signal processing section 3 7 63 1515 0
Is the sound output from
both channels (L, R)?
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L 13942296513
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1-28 (No.MA139)
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NO
No sound from either
channel.
YES
Normal
Is 9V present at IC161
pin 31?
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 3
and 30 during playback?
Check the power amp.
IC301.
x ao
y
i
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8
Compare the L-ch and
NO
R-ch to locate the
defective point.
YES
Check the vicinity of the
NO
IC901 audio power
YES
NO
Check IC581 and its
peripheral circuits.
YES
NO
Check IC161 and its
peripheral circuits.
YES
Q Q
3 6 7 1 3
u163
.
2 9 9 4 2 8
supply.
1 5 0 5 8 2 9 9 4
m
co
9 9
2 8 9 9