Fusing Heaters Do Not Operate; Power Is Not Supplied To Option - Konica Minolta bizhub C250 Service Manual

17. Power supply trouble

17.3 Fusing heaters do not operate

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

17.4 Power is not supplied to option

17.4.1 Power is not supplied to ADF
Step
Is DC24 V being output from CN51-1 on DF-
1
601?
Is DC24 V being output from PJ12PU1-6 on
2
PU1?
3 Is the fuse on PU1 conducting?
17.4.2 Optional paper feed cabinet
Step
Is DC24 V being applied to hookup connec-
1
tor CN12-2?
Is DC24 V being output from CNCST-2 on
2 PWB-M?
3 Is the fuse on PU1 conducting?
470
Relevant Electrical Parts
Check Item
Check Item
Check Item
Field Service Ver. 3.0 Aug. 2006
DC Power Supply (PU1)
WIRING
DIAGRAM Result
(Location)
Check wiring from power
outlet to S2 to PJ2PU1.
R to Q-6 NO
YES Fusing Unit
S-6 to 7
NO Change PU1.
WIRING
DIAGRAM Result
(Location)
Malfunction in DF-601
Y-8 YES
Check wiring from PU1 to
Q to R-8 NO
CN4 to ADF.
YES Change PU1.
—
NO Malfunction in DF-601
WIRING
DIAGRAM Result
(Location)
Malfunction in Paper Feed
R-26 NO
Cabinet
Check wiring from PWB-M
J-23 NO to CN12 to Paper Feed
Cabinet.
YES Change PU1.
—
Malfunction in Paper Feed
NO
Cabinet
Action
Action
Action