19. Power Supply Trouble; Machine Is Not Energized At All (Pu1 Operation Check); 19.2 Only The Power Supply Cooling Fan Motor Turns - Konica Minolta bizhub 362 Service Manual

Field Service Ver. 1.0 Dec. 2008

19. Power supply trouble

19.1 Machine is not Energized at All (PU1 Operation Check)

Main Power Switch (S1)
Power Supply Unit (PU1)
Step
Is a voltage being applied to the electrical
1
outlet?
2 Is the wiring to terminal S1 correct?
Is there continuity across the fuse (F101)
3
on PU1?
Is there continuity across the fuse (F103)
4
on PU1?
Is the wiring between the MFBS Board and
5
Mechanical Control Board correct?
Is the wiring between the Mechanical Con-
6
trol Board and Power Supply Unit correct?
Is DC 5 V being output from PJ8A-2 on the
7
PWB-A?

19.2 Only the Power Supply Cooling Fan Motor turns

Power Supply Unit (PU1)
Control Panel (UN1)
Step
Is DC 4.5 V being output from PJ8A-3 on
1
the PWB-A?
Is DC 5 V being output from PJ9PU1-1 on
2
PU1?
Relevant Electrical Parts
Check Item
Relevant Electrical Parts
Check Item
19. Power supply trouble
Mechanical Control Board (PWB-A)
MFBS Board (MFBS)
Location
(Electrical Result
Component)
- NO Provide a power supply.
W-22 NO Rewire
- NO Change the fuse.
- NO Change the fuse.
- NO Rewire
- NO Rewire
NO Change PWB-A
-
YES Change PU1
Mechanical Control Board (PWB-A)
Location
(Electrical Result
Component)
- NO Change PWB-A
NO Change PU1
-
YES Change UN1
Action
Action
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