3-1
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 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 shor-circuiting of primary
circuit component and service it if defective.
(Q1001,Q1003,T1001,D1001,D1002,D1003,
D1004,D1011,C1003,C1005)
Yes
Yes
Yes
No
No
No
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.
No
Yes
Does the secondary side photo coupler circuit
operate normally?
Check the circuit and service it if defective.
(IC1001, D1012, D1024)
Check the circuit and service it if defective.
(IC1001, IC1006, D1018)
FLOW CHART NO.4
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,D015,D016,D1008,D1010,D1016,D1020,IC1002,IC1004,Q055,Q056,Q057,Q1004,Q1006,Q1011)
No
Yes
FLOW CHART NO.5
-FL is not outputted.
Is the supply voltage of -24V fed to the anode of
D1010?
Check D1010 and their periphery, and service it if
defective.
Check for load circuit short-circuiting or leak, and
service it if defective.
3-1 TROUBLESHOOTING
Troubleshooting is how to service for the specifying malfunction or poor parts.
Detect malfunction or poor parts and service as the following charts.
3-1-1 Power Supply Section
MAINTENANCE AND INSPECTION
3
Summary of Contents for DV-PF33U
Page 57: ...5 13 Fig DM16 41 42 43 L 13 44 45 Slide Fig DM17 ...
Page 70: ...5 3 1 Main 1 8 Schematic Diagram 3 SCHEMATIC DIAGRAMS ...
Page 72: ...7 3 3 Main 3 8 Schematic Diagram ...
Page 73: ...8 3 4 Main 4 8 Schematic Diagram ...
Page 74: ...9 3 5 Main 5 8 Schematic Diagram ...
Page 75: ...10 3 6 Main 6 8 Schematic Diagram ...
Page 76: ...11 3 7 Main 7 8 DVD OPEN CLOSE Schematic Diagrams ...
Page 77: ...12 3 8 Main 8 8 Schematic Diagram ...
Page 80: ...15 3 11 DVD Main 1 3 Schematic Diagram ...
Page 81: ...16 3 12 DVD Main 2 3 Schematic Diagram ...
Page 83: ...18 3 13 DVD Main 3 3 Schematic Diagram ...
Page 86: ...21 5 2 Main CBA Bottom View ...