JVC KD-G301 Service Manual page 26

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5.5 Signal processing section
Is the sound output from
both channels (L, R)?
Normal
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NO
No sound from either
channel.
YES
Is 9V present at IC161 pin
Is the audio signal
(including sampling output
components) output to
IC571 pins 1 and 7 during
playback?
Is the audio signal output
at IC161 pins 3 and 30
during playback?
Check the muting circuit.
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2 9
8
NO
Compare the L-ch and
R-ch to locate the
YES
NO
Check the viciniyt of the
31?
IC901 audio power
YES
NO
Check IC571 and its
peripheral circuits.
YES
NO Check IC161 and its
peripheral circuits.
YES
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