Denon DCD-F109 - Trouble Shooting Flowcharts; Flow Chart No. 1: Power Issues; Flow Chart No. 2: +3.3 V_D Output Issues

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TROUBLE SHOOTING
FLOW CHART NO.1
Is Power LED lit?
Is the +3.3V_NSW line voltage normal?
Is the "H" level MCU Reset to Pin(77) of IC11?
The power cannot be turned on.
Is normal state restored when once unplugged power cord is plugged
again after several seconds?
+3.3V_D is not outputted.
Check IC609 and the periphery circuit, and service it if defective.
Check each voltage regulator circuit and service it if defective.
Is +7V_DRV voltage supplied to IC609?
Check if there is any leak or short-circuiting rectier
circuit of SUB Power transformer, and service it if
defective.
(PT601,IC611,Q609-Q612,D633-D638)
NO
NO
NO
Check IC11,IC12and the periphery circuit, and service it
if defective.
Check if there is any leak or short-circuiting rectier
circuit of Power transformer, and service it if defective.
(Main Trans,IC610,D617,D618,D622,D623)
NO
NO
YES
YES
YES
YES
YES
FLOW CHART NO.2