Philips DVP3126K Service Manual page 17

Distorted audio and loud noise
Distorted audio and
loud noise
Yes
Check the power supply
voltages +12V
operation amplifying Q27
and -12V are normal.
Yes
Check whether the muting
transistor R176
R175 are normal.
Yes
Check whether the muting
transistor Q17~Q18,Q40~Q43
Q42 are normal
Yes
Checking the
leads the feet has no
to break to open
Yes
Replace U1
No
to the
No
and
No
U1
No
4-7
Check Q27
Replace R176 and R175
Replace Q17~Q18 ,Q40~Q43
Correct connection
Trouble shooting chart