C1401: Backup Ram Malfunction - Konica Minolta bizhub C250 Service Manual

Field Service Ver. 1.0 Jul. 2005
(3) Finisher Control Board
Exit Tray Home Position Sensor (PI9-FN)
Shift Motor Clock Sensor (PI17-FN)
Shift Motor (M6-FN)
Step
Check the motor and sensor connectors
1 for proper connection, and correct as
necessary.
Check the connector of motor for proper
2 drive coupling, and correct as neces-
sary.
3 PI9-FN I/O sensor check
4 PI17-FN I/O sensor check
M6-FN operation check when the Main
5
Power Switch is turned OFF and ON.
6 PWB-A FN replacement
8.3.13

C1401: Backup RAM malfunction

Finisher Control Board (PWB-A FN)
Step
Disconnect and then connect the power
cord. Turn OFF the Main Power Switch,
1
wait for 10 sec. or more, and turn ON
the Main Power Switch.
Check the connectors for proper con-
2
nection on the PWB-A FN.
3 PWB-A FN replacement
Relevant electrical parts
Action
Relevant electrical parts
Action
Finisher Control Board (PWB-A FN)
WIRING DIAGRAM
Control signal
—
—
PWB-A FN CN5A FN-12 (ON)
PWB-A FN CN15A FN-6 (ON)
PWB-A FN CN6A FN-1 to 2
—
WIRING DIAGRAM
Control signal
—
—
—
8. Trouble code
Location
(Electrical
components)
—
—
FS-603 G-6
FS-603 G-4
FS-603 B-3
—
Location
(Electrical
components)
—
—
—
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