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3.2.5 Signal processing section
Is the sound output from
both channels (L, R)?
Normal
NO
No sound from either
YES
Is 9V present at IC101 pin
Is the audio signal
(including sampling output
components) output to
IC521 pins ^and | during
Is the audio signal output
at IC101 pins 1
and7during playback?
Check the muting circuit.
NO
Compare the L-ch and R-ch
channel.
to locate the defective point.
YES
NO
Q981 audio power supply.
(8)?
YES
NO
YES
NO
YES
YES
Check the vicinity of the
Check IC521 and its
peripheral circuits
Check IC101 and its
peripheral circuits
(No.49788)1-25
KD-S790
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