Toshiba SD-270EKB2 Service Manual page 10

Distorted audio and loud noise
Distorted audio and
Check the power supply
voltages
operation amplifying Q27
and -12V are normal.
Check
muting transistor R176
andR175 are normal
Check
muting
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 U15
normal
Replace U1 or U15
loud noise
Yes
+12V to the
Yes
whether the
Yes
whether the
transistor
Yes
Yes
Yes
powersupply
Yes
1-7
No
Check Q27
No
Replace R176 and R175
No
Replace Q17~Q18
No
Correct connection
Replace U1
No
SACLK waveform
No
Check U15
Trouble shooting chart
SBCLK waveform SLRCK waveform
S