Denon dvd-1200 Manual Do Serviço

14

14

DVD-1200

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. 

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. (D1003, D1006, D1008, D1016, D1030, IC1002, Q1002, Q1004, Q1010, Q1011, Q1014)

Does the photo coupler circuit on the secondary 
side operate normally?

Check IC1001, D1012, D1024 and their periphery, 
and service it if defective. 

Check IC1001, IC1006, D1015, D1048 and their 
periphery, and service it if defective. 

-FL is not outputted.

Is -24V voltage supplied to the anode of D1003?

Check D1003 and periphery circuit, and service it 
if defective.

Check if there is any leak or short-circuit 
on the loaded circuit, and service it if defective.

Yes

No

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 +9V line voltage normal?

Is each voltage of the secondary side 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. 
(Q1001, Q1003, T1001, D1001, D1002, D1004, 
D1005, D1011, C1003, C1005)

Check each rectifying circuit of the secondary circuit 
and service it if defective. 

Yes

Yes

Yes

Is the voltage of 5V supplied to pin(1) of IC2002?

Is the voltage of 3.3V outputted to pin(19) of CN1001?

Yes

When pressing POWER button (SW2001), is the 
voltage of 0V supplied to pin(8) of IC2002?

Yes

Yes

Is the voltage of 0V supplied to pin(18) of IC2002?

Replace IC2002.

Yes

Yes

No

No

No

No

Check POWER button (SW2001) and their 
periphery, and service it if defective. 

No

Check EV+5V line and service it if defective. 

No

Replace DVD Main CBA unit.

No

Check Q2007 and their periphery, and service it if 
defective. 

No