Konica Minolta Bizhub 222, Service Manual, Page: 839 / 846

9. Jam Display Field Service Ver. 1.0 Dec. 2008
38
SD-507
TROUBLESHOOTING
9.3 Solution
9.3.1 Initial Check Items
• When a paper misfeed occurs, first make checks of the following initial check items
9.3.2 Folding Section Misfeed
A. Detection Timing
B. Action
Check Item Action
Does paper meet product specifications? Change paper.
Is paper curled, wavy, or damp.
Change paper.
Instruct user in correct paper storage.
Is a foreign object present along the paper path, or
is the paper path deformed or worn?
Clean or change the paper path.
Are rolls/rollers dirty, deformed, or worn? Clean or change the defective roll/roller.
Are the Edge Guide and Trailing Edge Stop at cor-
rect position to accommodate paper?
Set as necessary.
Are actuators found operational as checked for cor-
rect operation?
Correct or change the defective actuator.
Type Description
Folding Section
misfeed detection
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
Entrance Motor (M3-FN)
Entrance Sensor (PC4-FN) Main Control Board (PWB-C SK)
Step Action
WIRING DIAGRAM
Control Signal
Location
(Electrical Component)
1 Initial check items - -
2 PC4-FN I/O check PWB-A FN PJ25A FN-4 (ON) FS-530 B-6
3 Change PWB-C SK - -