2MN/2N1
1-4-79
8300 Center-folding unit commu-
nication error
(4000-sheet finisher)
Communication with the cen-
ter-folding unit is not possible.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
CF main PWB (YC7) and DF main PWB
(YC9)
Defective CF set
sensor.
Replace the CF set sensor.
Defective PWB. Replace the CF main PWB or the DF main
PWB and check for correct operation.
8310 CF side registration motor 2
error
(4000-sheet finisher)
When initial operation, CF
side registration sensor 2
does not turn on within 1 s.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
CF side registration motor 2 and CF main
PWB (YC10)
CF side registration sensor 2 and CF main
PWB (YC20)
Defective CF side
registration sensor
2.
Replace CF side registration sensor 2.
Defective CF side
registration motor
2.
Replace CF side registration motor 2.
Defective CF main
PWB.
Replace the CF main PWB and check for
correct operation.
8320 CF adjustment motor error
(4000-sheet finisher)
When initial operation, CF
adjustment sensor does not
turn on within 2.5 s.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
CF adjustment motor 1, 2 and CF main PWB
(YC10)
CF adjustment sensor 1, 2 and CF main
PWB (YC20)
Defective CF
adjustment sensor
1, 2.
Replace CF adjustment sensor 1, 2.
Defective CF
adjustment motor
1, 2.
Replace CF adjustment motor 1, 2.
Defective CF main
PWB.
Replace the CF main PWB and check for
correct operation.
Code Contents Causes
Check procedures/
corrective measures