Denon DCD-520AE - TROUBLE SHOOTING FLOW CHARTS; FLOW CHART NO.1; FLOW CHART NO.2

40
TROUBLE SHOOTING
FLOW CHART NO.1

Is the MCU +3.9V line voltage normal?

Is normal state restored when once unplugged power cord is plugged
again after several seconds?

D+3.3V is not outputted.

Check each voltage regulator circuit and service it if defective.



defective.

NO
NO


defective.


defective.
NO
NO
NO
YES
YES
YES
YES
YES
FLOW CHART NO.2