Distorted audio and loud noise
Trouble shooting chart
Distorted audio and
loud noise
Yes
Check the power supply voltages |
|
+12VA | No |
Check whether the output of the power board is normal.If abnormal ,change the power board
Yes
Check whether R73 and R77 are normal
Yes
Check whether the
muting transistor Q8,Q10.Q12 are normal
Yes
Checking the U5 leads the feet has no to break to open
Yes
Check whether the U7 or U8 powersupply normal
No
No
No
No
Replace R77 and R73
Replace Q8,Q10 ,Q12
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Check U7,U8
Yes
Replace U7 or U8