DV-RW360H (serv.man4). Pages 1-7-1 to 1-14-7 - Sharp DVD Service Manual (repair manual). Page 9

1-11-1

E9B30TR

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 AL+5V line voltage normal?

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

See FLOW CHART No.2  <The fuse blows out.>

Check for lead or short-circuiting of primary
circuit component and service it if defective.
(Q1001, Q1003, T0011, D1001, D1002, D1003,
D1004, D1011, C1005, C2014)

Yes

Yes

Yes

No

No

No

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.

No

Yes

Does the secondary side photo coupler circuit
operate normally?

Check the circuit and service it if defective.
(IC1001, D1006, D1012, D1024)

Check the circuit and service it if defective.
(IC1001, Q1004, D017, D1019)

When buzz sound can be heard in the vicinity of power circuit.

Check if there is short circuit on the rectifying diode and the circuit in each rectifying circuit of secondary side 
and service it if defective. (D013, D014, D016, D018, D019, D1008, D1016, D1030, D1031, D1032, IC1504, 
IC1505, Q1508, Q1510, Q1511, Q1513, Q1515, Q1516, Q1518, Q1542)

No

Yes

-FL is not outputted. 

Is the supply voltage of -30V fed to the anode of 
D018?

Check D018 and their periphery, and service it if 
defective.

Check for load circuit short-circuiting or leak, and 
service it if defective.