3MJ
1-4-4
C8190
Built-in finisher trailing edge registra-
tion motor problem
When the trailing edge registration
home-position sensor is turned on during
initialization, the sensor did not turn on
while it has moved by 106 pulses.
When the trailing edge registration
home-position sensor is turned off during
initialization, the sensor did not turn on in
3 s.
The trailing edge
registration motor
connector makes
poor contact.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
remedy or replace the cable.
Defective trailing
edge registration
motor.
Replace trailing edge registration motor.
The trailing edge
registration home
position sensor
connector makes
poor contact.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
remedy or replace the cable.
Defective trailing
edge registration
home position sen-
sor.
Replace the trailing edge registration home
position sensor.
Defective finisher
control PWB.
Replace the finisher control PWB and check
for correct operation.
C8210
Built-in finisher stapler problem
The stapler home position sensor does
not change state from nondetection to
detection within 200 ms of the start of
stapler motor counterclockwise (forward)
rotation.
During initialization, the stapler home
position sensor does not change state
from non-detection to detection within
600 ms of the start of stapler motor
clockwise (reverse) rotation.
The stapler con-
nector makes poor
contact.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
remedy or replace the cable.
The stapler is
blocked with a sta-
ple.
Remove the stapler cartridge, and check the
cartridge and the stapling section of the sta-
pler.
The stapler is bro-
ken.
Replace the front stapler and check for cor-
rect operation.
Defective finisher
control PWB.
Replace the finisher control PWB and check
for correct operation.
Code
Contents
Remarks
Causes
Check procedures/corrective measures
Summary of Contents for DF-420
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