Philips 32PFL4507/F7 - Audio Is Not Outputted Normally

8-4 PL12.2ATR
[Audio Signal Section]
SP3801, SP3802 or CL3801 may be defective.
Check and replace these parts.
Audio is not outputted normally.
FLOW CHART NO.1
Are the audio signals outputted to Pin(1, 4) of C
N3801?
Replace Digital Main CBA Unit.
No
Ye s
Is approximately +24V voltage supplied to Pin(13, 14)
of CN631?
Is
approximately +
3.3V voltage supplied to Pin(11) of
CN631?
No
No
Ye s
Is approximately +21V voltage supplied to
Pin(16, 17, 22, 23) of CN631?
See FLOW CHART NO.5 <P-ON+21V is not output.
[Power Supply Section]>
See FLOW CHART NO.7 <AL+3.3V is not output.
[Power Supply Section]>
See FLOW CHART NO.6 <AMP+24V is not output.
[Power Supply Section]>
No
Ye s
Ye s