18. Power supply trouble
Field Service Ver. 1.0 Jun. 2008
316
T
roubleshooting
18.3 Fusing heaters do not operate
18.4 Power is not supplied to option
18.4.1
DF-612
18.4.2
PC-105/104/204/405
18.4.3
JS-505
Relevant parts
Main power switch (SW1)
Right door switch (MS5)
Fusing unit
DC power supply (DCPU)
Step
Check item
WIRING
DIAGRAM
(Location)
Result
Action
1
Is the power source voltage applied across
CN_MCB-4 on DCPU?
During this time, the right door should be
closed.
R-4 to 5
NO
Check wiring from power
outlet to SW1 to
CN_MCB-4 to MS5.
2
Is the power source voltage applied across
CN1FIX-1 to 3 or CN1FIX-2 to 3?
D-21
YES
Fusing unit
NO
Change DCPU.
Step
Check item
WIRING
DIAGRAM
(Location)
Result
Action
1
Is CN13 on MFBUB to CN1 on DF-612
securely connected?
U to V-7 to 9
NO
Reconnect.
2
Is the fuse on DCPU conducting?
—
YES
Malfunction in DF-612.
NO
Change DCPU.
Step
Check item
WIRING
DIAGRAM
(Location)
Result
Action
1
Is DC24 V being applied to hookup
connector CN79-14?
K-22
NO
Malfunction in paper feed
cabinet
2
Is DC24 V being output from CN_OPN-2
on DCPU?
R-5
NO
Check wiring from DCPU
to CN_OPN to paper feed
cabinet.
3
Is the fuse on DCPU conducting?
—
YES
Malfunction in paper feed
cabinet
NO
Change DCPU.
Step
Check item
WIRING
DIAGRAM
(Location)
Result
Action
1
Are DC24 V being applied to CN86-1?
K-25
NO
Malfunction in JS-505.
2
Is DC24 V being output from CN_OPN-1
on DCPU?
R-5
NO
Check wiring from DCPU
to JS-505.
3
Is the fuse on DCPU conducting?
—
YES
Malfunction in JS-505.
NO
Change DCPU.
d-Color MF201
Service Manual Y109660-1