9. Jam Display Field Service Ver. 1.0 Aug. 2005
38
FS-508/PU-501/OT-601
Troubleshooting
9.3.2 Transport Section Misfeed
A. Detection Timing
B. Action
Type Description
Finisher Transport Section
misfeed detection
The Entrance Sensor (PC4-FN) is not blocked even after the set period of
time has elapsed after the copier’s Paper Exit Sensor (PC4) is blocked by
the paper.
The Entrance Sensor (PC4-FN) is not unblocked even after the set period
of time has elapsed after the copier’s Paper Exit Sensor (PC4) is unblocked
by the paper.
Finisher Paper Exit
Section misfeed detection
The Transport Sensor (PC5-FN) is not blocked even after the set period of
time has elapsed after the Entrance Sensor (PC4-FN) is blocked by the
paper.
The Transport Sensor (PC5-FN) is not unblocked even after the set period
of time has elapsed after the Entrance Sensor (PC4-FN) is unblocked by
the paper.
Detection of paper
remaining in the Transport
Section
The Entrance Sensor (PC4-FN) is blocked when the Power Switch is set to
ON, a door or cover is opened and closed, or a misfeed or malfunction is
reset.
The Transport Sensor (PC5-FN) is blocked when the Power Switch is set to
ON, a door or cover is opened and closed, or a misfeed or malfunction is
reset.
Relevant Electrical Parts
Paper Exit Sensor (PC4)
Entrance Sensor (PC4-FN)
Transport Sensor (PC5-FN)
Main Control Board (PWB-A FN)
Mechanical Control Board (PWB-A)
Step Action
WIRING DIAGRAM
Control Signal
Location
(Electrical Component)
1 Initial check items - -
2 PC4 I/O check PWB-A PJ18A-11 (ON) M-12
3 PC4-FN I/O check PWB-A FN PJ25A FN-4 (ON) FS-508 G-4
4 PC5-FN I/O check PWB-A FN PJ20A FN-9 (ON) FS-508 B-5
5 Change PWB-A FN - -
6 Change PWB-A - -