3NC/3NB/3NK
1-4-20
8800 Document finisher commu-
nication error
Communication with the docu-
ment finisher is not possible.
Defective connec-
tor cable or poor
contact in the con-
nector (4000-sheet
finisher).
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
DF main PWB (YC4) and engine PWB
(YC18)
Defective connec-
tor cable or poor
contact in the con-
nector (1000-sheet
finisher).
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
DF main PWB (YC7) and engine PWB
(YC18)
Defective PWB. Replace the DF main PWB or the engine
PWB and check for correct operation.
8900 Document finisher backup
error
Read and write data does not
match 3 times in succession.
Defective connec-
tor cable or poor
contact in the con-
nector (4000-sheet
finisher).
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
DF main PWB (YC4) and engine PWB
(YC18)
Defective connec-
tor cable or poor
contact in the con-
nector (1000-sheet
finisher).
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
DF main PWB (YC7) and engine PWB
(YC18)
Improper installa-
tion EEPROM.
Check the installation of the EEPROM and
remedy if necessary.
Defective DF main
PWB.
Replace the DF main PWB and check for
correct operation.
Code Contents Causes
Check procedures/
corrective measures
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