JVC KD-G501 Service Manual page 27

5.5 Signal processing section
Is the sound output from
both channels (L, R)?
Normal
NO
No sound from either
YES
Is 9V present at IC161 pin
Is the audio signal
(including sampling output
components) output to
IC581 pins 1 and 7 during
Is the audio signal output
at IC161 pins16 and 17
during playback?
Check the muting circuit.
NO
channel.
YES
NO
31?
YES
NO
playback?
YES
NO
YES
Compare the L-ch and
R-ch to locate the
defctive point.
Check the viciniyt of the
IC901 audio power
supply.
Check IC581 and its
peripheral circuits.
Check IC161 and its
peripheral circuits.
(No.MA038)1-27