Philips BDP7520/F7 Service Manual page 20

FLOW CHART NO.7
P-ON+10.5V is not outputted.
Is 13V voltage inputted to Pin(2) of IC1012?
Is the "H" signal inputted to Pin(7) of IC1012?
Replace IC1012.
FLOW CHART NO.8
The fluorescent display tube does not light up.
Is 3.3V voltage supplied to Pin(13, 43) of IC5001?
Is approximately -17V voltage supplied to Pin(30)
of IC5001?
Is there approximately 500kHz oscillation to
Pin(5) of IC5001?
Are the filament voltage applied between Pin(1, 2)
and Pin(31, 32) of the fluorescent display tube?
Also negative voltage applied between these pins
and GND?
Check the fluorescent display tube (FL5001),
and service it if defective.
No
Yes
No
Yes
Yes
Yes
Yes
Yes
Check D1023, C1018, C1024, L1003 and their
periphery, and service it if defective.
Replace BD Main CBA & BD Mechanism Assembly.
Check the EV+5V line on the Power Supply CBA
No
and service it if defective. Or replace BD Main
CBA & BD Mechanism Assembly.
No
Check the -FL line and service it if defective.
No
Check R5007, IC5001 and their periphery, and
service it if defective.
No
Check the power circuit, D1010, D1017, C1016,
C1038 and their periphery, and service it
if defective.
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