Philips SDV434/19, Руководство по обслуживанию

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4-7
Distorted audio and loud noise
No
Yes
No
Yes
Yes
No
No
Distorted audio and
loud noise
Replace L7 and L8
Check Q2and Q4
Replace Q29,Q31 and Q25
Check whether the
muting transistor L7
and L8 are normal
Yes
Check whether the
muting transistor Q29,
Q31 and Q25 are normal
Checking the U11 leads
the feet has no to break to
open
Correct connection
Replace U3
if the clock signal ACLK,
ABCK and ALRCK
output by U3 are normal
Check whether the U3 or
U11 power supply normal
No
Yes
Check the power supply voltages
+12V and -12V to the operation
amplifying Q2 andQ4 are normal.
Yes
Check U11
Replace U3 or U11
No
Yes
Trouble shooting chart
SACLK waveform
SBCLK waveform
S
SLRCK waveform