Denon DVD-910 Service Manual page 14

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FLOW CHART NO.6
P-ON+9V (EV+9V) is not outputted.
Is 9V voltage supplied to the emitter of Q1002?
Is the voltage of base on Q1002 lower than the
voltage of emitter on Q1002 when turning the power on?
Replace Q1002.
FLOW CHART NO.7
P-ON+5V is not outputted. (P-ON+9V is outputted normally.)
Is the "H" pulse inputted into the base of Q1004?
Replace Q1004.
FLOW CHART NO.8
P-ON+3.3V is not outputted. (P-ON+9V is outputted normally.)
Is 3.3V voltage supplied to the collector of Q1011?
Replace Q1011 and R1067.
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FLOW CHART NO.9
EV+5V is not outputted.
Is EV+9V outputted normally?
Check Q1014, D1047 and the periphery circuit,
and service it if defective.
FLOW CHART NO.10
EV+1.5V is not outputted.
Is 2.5V voltage supplied to Pin(1) of IC1002?
Is 1.25V voltage supplied to Pin(4) of IC1002?
Replace IC1002.
FLOW CHART NO.11
EV+3.3V is not outputted.
Is 3.3V voltage supplied to emitter of Q1010?
Is the "L" pulse inputted to base of Q1012?
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Check Q1010, Q1012, R1087 and R1088, and
service it if defective.
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Yes
Yes
Yes
Yes
Yes
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No
Check D1030, D1048, C1035, C1048, L1009 and
the periphery circuit, and service it if defective.
No
Check Q1016 and PWRCON line and service it if
defective.
No
Check R1068 and D1046, and service it if defective.
No
Check D1008, D1015, C1007, C1038, L1007 and
the periphery circuit, and service it if defective.
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No
Refer to "FLOW CHART NO.6"
<P-ON+9V (EV+9V) is not outputted.>
Check D1006, C1014, C1050, L1008 and the
No
periphery circuit, and service it if defective.
No
Is the "L" pulse outputted into Pin(19) of IC2002?
Yes
Check the circuit between Pin(19)
of IC2002 and Pin(4) of IC1002,
and service it if defective.
Check D1030, D1048, C1035, C1048, L1009 and
No
the periphery circuit, and service it if defective.
No
Is the "L" pulse outputted into Pin(19) of IC2002?
Yes
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Check the circuit between Pin(19)
of IC2002 and base of Q1012,
.
and service it if defective.
14
DVD-910
9 4 2 8
0 5 8 2 9 9 4 2 8
Replace IC2002.
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Replace IC2002.
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9 9
9 9
No
No