Philips 22PFL4507/F7 - Page 30

8-4 PL12.0ATR
[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, 4) of CN3801?
Replace Digital Main CBA Unit.
No
Ye s
Is approximately +13V voltage supplied to Pin(10, 11)
of CN631?
Is
approximately +
3.3V voltage supplied to Pin(13) of
CN631?
No
No
Ye s
See FLOW CHART NO.7 <AL+3.3V is not output.
[Power Supply Section]>
See FLOW CHART NO.6 <AMP+13V is not output.
[Power Supply Section]>
Ye s