3H3
1-4-8
C8040
Lower paper conveying belt problem
• During initialization, the intermediate
tray lower sliding plate is not detected
in the home position within 3 s after
the belt returns to the home position.
JAM87 is indicated the first time this
problem occurs. If the problem reoc-
curs after initialization when the front
cover is opened and closed, the prob-
lem is in the lower paper conveying
belt.
• When the intermediate tray lower slid-
ing plate is operated from the home
position, the lower paper conveying
belt home position sensor does not
turn off within 1 s.
Phase shift of the
lower paper con-
veying belt.
Correct the phase of the lower paper con-
veying belt and check for correct operation.
Malfunction of the
lower paper con-
veying belt motor.
Replace the lower paper conveying belt
motor and check for correct operation.
Malfunction of the
lower paper con-
veying belt home
position sensor.
Replace the lower paper conveying belt
home position sensor and check for correct
operation.
Loose connection
of the lower paper
conveying belt
home position sen-
sor connector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
remedy or replace the cable.
Incorrect insertion
of the intermediate
tray.
Check whether the intermediate tray
catches are damaged.
Defective finisher
main PWB.
Replace the finisher main PWB and check
for correct operation.
C8140
Main tray problem
• When the main tray is not detected by
the main tray upper limit detection sen-
sor or the main tray load detection
sensor within 20 s from the moment it
starts ascending.
• During main tray descent, the main
tray upper limit detection sensor or the
main tray load detection sensor does
not turn off within 500 ms after it turns
on.
• During main tray ascent, the main tray
upper limit detection sensor or the
main tray load detection sensor stays
on for more than 2 s.
Loose connection
of the main tray
elevation motor
connector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
remedy or replace the cable.
Malfunction of the
main tray eleva-
tion motor.
Replace the main tray elevation motor and
check for correct operation.
Malfunction of the
main tray upper
limit detection sen-
sor.
Replace the main tray upper limit detection
sensor and check for correct operation.
Loose connection
of the main tray
upper limit detec-
tion sensor con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
remedy or replace the cable.
Malfunction of the
main tray load
detection sensor.
Replace the main tray load detection sensor
and check for correct operation.
Loose connection
of the main tray
load detection sen-
sor connector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
remedy or replace the cable.
Defective finisher
main PWB.
Replace the finisher main PWB and check
for correct operation.
Code
Contents
Remarks
Causes
Check procedures/corrective measures
Service Manual Y1043
71
-
8
