3NB/3ND/3N0/3NK
1-4-24
8520
MB conveying motor error 2
When standby operation, MB
home position sensor does
not turn off 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.
MB conveying motor and MB main PWB
(YC5)
MB home position sensor and MB main
PWB (YC2)
Defective MB
home position sen-
sor.
Replace the MB home position sensor.
Defective MB con-
veying motor.
Replace the MB conveying motor.
Defective MB main
PWB.
Replace the MB main PWB and check for
correct operation.
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.
(see page 1-5-2)
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.(see page 1-5-2)
Code
Contents
Causes
Check procedures/
corrective measures
Y113480-7
Sevice Manual
Summary of Contents for DF-790
Page 1: ...SERVICE MANUAL Options DF 790 BF 730 MT 730 AK 730 PH 7C Code Y113480 7...
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Page 32: ...3NB 3ND 3N0 3NK 1 2 14 3 Remove tape and pad Figure 1 2 18 Tape Pad Service Manual Y113480 7...
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