Www Ao - JVC KD-G111 Service Manual

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5.1.5 Signal processing section 3 7 63 1515 0
Is the sound output from
both channels (L, R)?
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NO
YES
Normal
Is 9V present at IC301 pin
(including sampling output
IC151 pins 1 and 7 during
Is the audio signal output
Check the muting circuit.
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2 9
8
NO
No sound from either
channel.
YES
NO
31?
YES
NO
Is the audio signal
components) output to
playback?
YES
NO
at IC301 pins 3 and 30
during playback?
YES
Q Q
3 6 7 1 3 1 5
co
.
9 4 2 8
Compare the L-ch and
R-ch to locate the
defective point.
Check the vicinity of the
Q321 audio power
supply.
Check IC151 and its
peripheral circuits.
Check IC301 and its
peripheral circuits.
0 5 8 2 9 9 4 2 8
m
(No.MA125)1-27
9 9
9 9