JVC KD-AR470 Service Manual page 19

5.2.5 Signal processing section
YES
Is the sound output from
both channels (L, R)?
NO
YES
No sound from either
channel.
NO
Compare the L-ch and
R-ch to locate the
defective point.
Normal
YES
Is 9V present at pin 26
of IC161?
NO
YES Check the connections
Is 9V present at pin 10
of IC901?
NO
Check IC901 and its
peripheral circuits.
Is the audio signal
(including sampling
YES
output components)
output to pins 1 and 7 of
IC581 during playback?
NO
Check IC581 and its
peripheral circuits.
between pin 26 of IC161
and pin 10 of IC901.
Is the audio signal output
at pin 19 and pin 20 of
IC161 during playback?
NO
Check IC161 and its
peripheral circuits.
YES
Check the power
amplifier IC301.
(No.MA232)1-19