Denon DBP-1610, Service Manual

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25
DBP-1610
TROUBLESHOOTING
FLOW CHART NO.2
The fuse blows out.
After servicing, replace the fuse.
Check the presence that the primary component
is leaking or shorted and service it if defective. Check the presence that the rectifying diode or
circuit is shorted in each rectifying circuit of
secondary side, and service it if defective.
FLOW CHART NO.3
When the output voltage fluctuates.
Yes
No
FLOW CHART NO.4
When buzz sound can be heard in the vicinity of power circuit.
Check if there is any short-circuit on the rectifying diode and the circuit in each rectifying circuit of the secondary
side, and service it if defective. (D1025, D1028, D1030, D1031, D1032, D1033, IC1008, IC1009, IC1010, Q1009,
Q1010, Q1011, Q1013, Q2636)
Does the photo coupler circuit on the secondary
side operate normally?
Check D1021, IC1002, IC1004 and their periphery,
and service it if defective.
Check D1029, IC1004 and their periphery,
and service it if defective.
FLOW CHART NO.5
FL is not outputted.
Is 35V voltage supplied to the emitter of Q2602?
Check D1032, C1033 and periphery circuit,
and service it if defective.
Check Q2601, Q2602, D2603 and their periphery,
and service it if defective.
Check FL-SW line and service
it if defective.
Is the "L" signal outputted to the collector of
Q2603?
Yes
Yes
Yes No
No
No
FLOW CHART NO.1
The power cannot be turned on.
Is the fuse normal?
Is normal state restored when once unplugged
power cord is plugged again after several seconds?
Is the EV+5V line voltage normal?
See FLOW CHART No.2 <The fuse blows out.>
Check if there is any leak or short-circuiting on the
primary circuit component, and service it if defective.
(D1007, D1008, D1011, D1012, D1023, D1024,
IC1002, Q1002, T1002, C1022, R1022)
Check each rectifying circuit of the secondary circuit
and service it if defective.
Yes
Yes
Yes
No
No
No
Is the "H" signal inputted to the base of Q2603?
Replace Q2603.