Solution; Initial Check Items; Creasing Section Misfeed - Konica Minolta bizhub 250 Service Manual

9. Jam Display
9.3

Solution

9.3.1

Initial Check Items

• When a paper misfeed occurs, first make checks of the following initial check items
Check Item
Does paper meet product specifications?
Is paper curled, wavy, or damp.
Is a foreign object present along the paper path, or
is the paper path deformed or worn?
Are rolls/rollers dirty, deformed, or worn?
Are the Edge Guide and Trailing Edge Stop at cor-
rect position to accommodate paper?
Are actuators found operational as checked for cor-
rect operation?
9.3.2

Creasing Section Misfeed

A. Detection Timing
Type
Creasing Section
misfeed detection
B. Action
Entrance Motor (M3-FN)
Entrance Sensor (PC4-FN)
Step
1 Initial check items
2 PC4-FN I/O check
3 Change PWB-C SK
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The Entrance Sensor (PC4-FN) is not blocked even after the set period of
time has elapsed after the Entrance Motor (M3-FN) is energized (beginning
of backward rotation operation).
The Entrance Sensor (PC4-FN) is not unblocked even after the set period
of time has elapsed after the Entrance Motor (M3-FN) is energized (begin-
ning of forward rotation operation).
Relevant Electrical Parts
Action
PWB-A FN PJ25A FN-4 (ON)
Field Service Ver. 1.0 Aug. 2005
Action
Change paper.
Change paper.
Instruct user in correct paper storage.
Clean or change the paper path.
Clean or change the defective roll/roller.
Set as necessary.
Correct or change the defective actuator.
Description
Main Control Board (PWB-C SK)
WIRING DIAGRAM
Control Signal
-
-
Location
(Electrical Component)
-
FS-508 B-6
-