Fusing Heaters Do Not Operate; Power Is Not Supplied To Option; Optional Paper Feed Cabinet; Power Is Not Supplied To Automatic Duplex Unit - Konica Minolta bizhub C250P Service Manual

Field Service Ver. 2.0 Mar. 2006

24.3 Fusing Heaters do not Operate

Primary Interlock Switch (S2)
Fusing Unit
Step
Is the power source voltage applied across PJ2PU1-1 to 3
1 on PU1?
During this time, the Right Door should be closed.
Is the power source voltage applied across CN30-1 and 3,
2
or across 2 and 3?

24.4 Power is not Supplied to Option

24.4.1

Optional Paper Feed Cabinet

Step
Is DC24 V being applied to hookup connector CN12-2?
1
Is DC24 V being output from CNCST-2 on PWB-M?
2
Is the fuse on PU1 conducting?
3
24.4.2

Power is not Supplied to Automatic Duplex Unit

Step
1 Is DC24 V being output from CN19-2 on Duplex?
Is DC24 V being output from CNDUP-2 on PWB-M?
2
Is the fuse on PU1 conducting?
3
24.4.3

Finisher

Step
Are DC24 V and DC5 V being applied to CN60-11 and
1
CN60-1, respectively, of the Finisher?
Are DC24 V and DC5 V being applied to PJ6PU1-1 on PU1
2
and CNFIN-1 on PWB-M, respectively?
Is the fuse on PU1 conducting?
3
Relevant Electrical Parts
DC Power Supply (PU1)
Check Item
Check Item
Check Item
Check Item
24. Power supply trouble
Result Action
Check wiring from power
NO outlet to S2 to PJ2PU1.
YES Fusing Unit
NO Change PU1.
Result Action
Malfunction in Paper Feed
NO
Cabinet
Check wiring from PWB-M
NO to CN12 to Paper Feed
Cabinet.
YES Change PU1.
Malfunction in Paper Feed
NO
Cabinet
Result Action
NO Malfunction in Duplex.
Check wiring from PWB-M
NO
to CN19 to Duplex.
YES Change PU1.
NO Malfunction in Duplex.
Result Action
Malfunction in Finisher.
NO
Check wiring from PU1 to
NO
PWB-M to Finisher.
YES Change PU1.
NO Malfunction in Finisher.
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