Philips 19PFL3504D/F7, Service Manual, Page: 27 / 124

8-2 A91N2TR
Check Q202, Q203, D203, P-ON-H1 line and their
periphery circuit, and service it if defective.
PANEL+24.5V is not output.
FLOW CHART NO.6
Is approxi30V voltage supplied to the collector
of Q205?
No
Yes
See FLOW CHART No.5
Replace Q201.
Is approxi13V voltage supplied to the
base of Q201?
Yes
No
Check Q202, Q203, D201, D202, D210 and their
periphery circuit, and service it if defective.
No
PANEL+13V is not output.
FLOW CHART NO.7
Is approxi15V voltage supplied to the
collector of Q201?
Yes
Check C631, D631, D668 and their periphery circuit,
and service it if defective.
P-ON+7V is not output.
FLOW CHART NO.8
Is approxi7V voltage supplied to the
collector of D641? Check C641, D641 and their periphery circuit,
and service it if defective.
Yes
No
Check if there is any leak or short-circuit on
the loaded circuit, and service it if defective.
See FLOW CHART No.8
P-ON+5V is not output. (PANEL+13V is outputted normally.)
FLOW CHART NO.9
Is approxi6.8V voltage supplied to the
collector of Q635(Q636)?
Is approxi6V voltage supplied to the
base of Q635(Q636)?
No
Yes
Yes
Check D659 and their periphery circuit, and service
it if defective.
No
Replace Q635(Q636).