Konica Minolta bizhub C35, Service Manual

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DRAFT
Field Service V er. 1.0 Feb. 2010 15. POWER SUPPLY TROUBLE
221
bizhub C35
TROUBLESHOOTING
15. POWER SUPPLY TROUBLE
15.1 Machine is not energized at all (DCPU operation check)
15.2 Control panel indicators do not light
Relevant parts
Power switch (SW1)
Printer control board (PRCB) DC power supply (DCPU)
Step Check item
WIRING
DIAGRAM
(Location)
Result Action
1 Is a power voltage supplied across CN1 on
DCPU? G-10 NO Check the wiring from the
wall outlet to inlet to SW1
to CN1DCPU.
2 Are DC5 V and DC3.3 V being output from
CN11 ON MFPB?
C-2 NO Check the wiring from the
CN5, CN9DCPU to
CN11MFPB.
3 Is DC3.3 V being output from PJ1 on
PRCB?
F-13 NO Check the wiring from the
CN4DCPU to PJ1PRCB.
4 Is DC24 V being output from CN105 on
MFPB?
C-2 YES Change MFPB.
5 Check the wiring from the CN16MFPB to
PJ21PRCB. - YES Reconnect.
Change flat cable.
6 Check the wiring from the PJ1PRCB to
CN4DCPU. - YES Reconnect.
NO Change PRCB.
Relevant electrical parts
MFP board (MFPB)
Control panel DC power supply (DCPU)
Step Check item
Location (electri-
cal component)
Result Action
1 Is a power voltage supplied across CN1 on
DCPU? G-10
NO
Check the wiring from
the wall outlet to inlet to
SW1 to CN1DCPU.
2 Are the fuses on DCPU conducting? - NO Change DCPU.
3 Is CN13 on MFPB properly connected? C-2 NO Reconnect.
4 Is CN11 on MFPB properly connected? C-2 NO Reconnect.
YES
Change MFPB.
Change scanner unit.
Change operation
panel.