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AV-20FD22
NO SOUND
CD301&CD302 INSERT OK?
YES
Is the voltage at
pin1 of IC302
DC6.6V?
YES
Is the voltage at
pin5 of IC302
DC3.9V?
YES
Q301 OK?
YES
Is audio signal
input from pin55 of
IC601?
YES
Check SPEAKER,
HEADPHONE and IC301.
22
TROUBLESHOOTING GUIDE
NO
NO
NO
NO
NO
INSERT CD301 & CD302.
Check SOUND +B Line.
Check TV POWER H Line and
associated circuit.
Check Q301 and A_MUTE Line.
Check MONITER_A_R
Line,MONITER_A_L Line
and associated circuit.
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