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Distorted audio and loud noise(Speaker)
Distorted audio and
loud noise(speaker)
Yes
Check the power supply voltages
+12V to the operation amplifying
Q27 and -12V are normal.
Yes
Check
whether
muting transistor FB1
are normal
Yes
Check
whether
muting
Q3~Q5 ,D1 are normal
Yes
Checking the U1 leads the
feet has no to break to
open
Yes
Replace U1
No
the
No
the
No
transistor
4-8
Check Q27
Replace FB1
Replace
Q3~Q5 ,D1
No
Correct connection
Trouble shooting chart
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