Toshiba SD-170EKB2 Service Manual page 10

Distorted audio and loud noise
Check the power supply voltages
+12V to the operation amplifying Q27
and -12V are normal.
Check
transistor R176 andR175 are
normal
Check
transistor Q17,Q18, are normal
Checking the U15 leads the feet
has no to break to open
if the clock signal AOUT0,
ABCK and ALRCK output by
U1 are normal
Check whether the U1
or
Distorted audio and
loud noise
Yes
Yes
whether the muting
Yes
whether the muting
Yes
Yes
Yes
U15 powersupply
Yes
Replace U1 or U15
1-7
No
No
Replace R176 and R175
No
Replace Q17~Q18
No
Correct connection
No
SBCLK waveform
SACLK waveform
No
Check U15
Trouble shooting chart
Check Q27
Replace U1
SLRCK waveform
S