15.3 Fusing Heaters Do Not Operate; 15.4 Power Is Not Supplied To Option - Konica Minolta Magicolor 8650 Service Manual

15. Power supply trouble

15.3 Fusing heaters do not operate

Main power switch (S1)
Right door switch (S5)
Fusing unit
Step
Is the power source voltage applied across
CN7DCPU-5 on DCPU?
1
During this time, the right door should be
closed.
Is the power source voltage applied across
2
CN27-1?

15.4 Power is not supplied to option

15.4.1 PC-106/205/406
Step
Is DC24 V being applied to hookup
1
connector CN47-13?
Is DC24 V being output from CN14PRCB-2
2
on PRCB?
3 Is the fuse on DCPU conducting?
15.4.2 FS-519/FS-609
1
Step
1 Are DC24 V being applied to CN51-1?
Are DC24 V being applied to CN4DCPU-1
2
on DCPU?
3 Is the fuse on DCPU conducting?
342
Confidential – for internal use only, do not distribute
Relevant parts
Check item
Check item
Check item
Field Service Ver. 2.0 Nov. 2007
DC power supply (DCPU)
WIRING
DIAGRAM Result
(Location)
Check wiring from power
Q-6 NO outlet to S1 to CN7DCPU
to S5.
YES Fusing unit
D-19
NO Change DCPU.
WIRING
DIAGRAM Result
(Location)
Malfunction in paper feed
J-16 NO
cabinet
Check wiring from PRCB
H-16 NO to CN47 to paper feed
cabinet.
YES Change DCPU.
—
Malfunction in paper feed
NO
cabinet
WIRING
DIAGRAM Result
(Location)
Malfunction in FS-519/FS-
J-18 NO
609.
Check wiring from DCPU
Q-3 NO
to FS-519/FS-609.
YES Change DCPU.
—
Malfunction in FS-519/FS-
NO
609.
Action
Action
Action