Magnavox DV225MG9 Service Manual page 23

FLOW CHART NO.6
P-ON+9V is not outputted.
Is 11V voltage supplied to the collector of Q055?
Is the "L" pulse inputted to the base of Q052?
Is 10V voltage inputted to the base of Q055?
Replace Q055.
FLOW CHART NO.7
P-ON+5V is not outputted. (P-ON+9V is outputted normally.)
Is 5V voltage supplied to the collector of Q056?
Is the "H" pulse inputted into the base of Q056?
Replace Q056.
FLOW CHART NO.8
TIMER+5V is not outputted. (AL+5V(1) is outputted normally.)
Is 4.5V voltage inputted to the base of Q063?
Replace Q063.
FLOW CHART NO.9
AL+18V is not outputted.
Is the supply voltage 44V fed the cathode of D013?
Check D504, R092, R095, and service it if defective.
FLOW CHART NO.10
DVD-P-ON+12V is not outputted.
Is 12V voltage supplied to the emitter of Q1006?
Is the "L" pulse (approximately 0V) outputted to
the collector of Q1005?
Replace Q1006.
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Check D015, D031, C018, and their periphery,
and service it if defective.
Replace IC501.
Check Q052, D052 and their periphery, and
service it if defective.
Check D016, D035, L009, C020, C021, and their
periphery, and service it if defective.
Check R057 and their periphery, and
service it if defective.
Check Q064, D062 and their periphery,
and service it if defective.
Check D013, C013 and their periphery, and
service it if defective.
Check D015, D031, C018 and their periphery,
and service it if defective.
Check Q1005 and PWRCON line, and service it if
defective.
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