Philips 40PFL4901/F7 - Connect to network

8-6 PL15.01ATR
[Audio Signal Section]
SP3801, SP3802 or CL3801 may be defective.
Check and replace these parts.
Audio is not output normally.
FLOW CHART NO.1
Are the audio signals output to Pin(1, 2, 3, 4) of CN3801?
Replace the Digital Main CBA Unit.
No
Ye s
Is the AMP+13V line voltage normal?
No
Ye s
See FLOW CHART NO.6 <AMP+13V is not output.
[Power Supply Section]>