Power Supply Trouble; Machine Is Not Energized At All (Pu1 Operation Check); Control Panel Indicators Do Not Light - Konica Minolta Bizhub C350 Service Manual

bizhub C350 Field Service Ver. 2.0 April 2004
3.

Power supply trouble

3.1

Machine is not Energized at All (PU1 Operation Check)

Power Switch (SW1)
Control Board (PWB-MC)
Step Check Item
Is a power voltage supplied across PJ1PU1-1
1 and 2 on PU1?
2 Are the fuses (F1 and F2) on PU1 conducting?
Is DC24 V being output from PJ5PU1-1 on
3
PU1?
4 Is DC5 V being input to PJ10PU1-1 on PU1?
Is DC5 V being input to PJ1MC-7 on the Con-
5
trol Board? (LED on PWB-MC does not blink.)
3.2

Control panel indicators do not light.

Image Processing Board (PWB-C)
Control Panel (UN201)
Step Check Item
Is the I/F cable between the Scanner and
1
engine connected properly?
Is a power voltage being applied across
2 PJ1PU1-1 and 2 on PU1?
3 Is the fuse (F1,F2) on PU1 conducting?
Is DC5 V being output from PJ10PU1-5 on
4
PU1 and DC24 V from PJ5PU1-3?
5 Is PJ12C on PWB-C securely connected?
Is CN1UN201on UN201 securely connected?
6
Relevant Electrical Parts
DC Power Supply (PU1)
WIRING
DIAGRAM
(Location)
26-G
—
23-E
23-C
14-E
Relevant Electrical Parts
DC Power Supply (PU1)
WIRING
DIAGRAM
(Location)
—
26-G
—
22-H
19-Y
24-F
4-49
Power supply trouble
Result Action
NO Check WIRING
between the wall outlet
and PJ1PU1.
NO Change PU1.
NO
Change PU1.
NO Change PU1.
NO Change PU1.
YES Change PWB-MC
Result Action
NO Reconnect or change
the I/F cable.
NO Check the WIRING from
the wall outlet to SW1
PJ1PU1.
NO Change PU1.
NO
Change PU1.
NO Reconnect.
NO Reconnect.
YES Change UN201.
Change PWB-C.