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QQ
3 7 63 1515 0
5.5
Signal processing section
Is the sound output from
both channels (L, R)?
Normal
TE
L 13942296513
www
.
1-26 (No.MA064)
http://www.xiaoyu163.com
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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ao
u163
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i
http://www.xiaoyu163.com
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
Q Q
3
6 7
1 3
1 5
co
.
9 4
2 8
defctive point.
supply.
0 5
8
2 9
9 4
2 8
m
9 9
9 9
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