2MN/2N1
1-4-81
8370 CF staple motor error 2
(4000-sheet finisher)
Staple JAM (DF) has been
detected twice in a row.
(The second JAM detection
condition fullfilled with a lock
detection signal maintained 1
V for 1000 ms continuously,
while the stapler motor was
driven.)
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 staple unit and CF main PWB (YC13)
Defective CF sta-
ple motor.
Replace the CF staple unit.
Defective CF main
PWB.
Replace the CF main PWB and check for
correct operation.
8410 Punch slide motor error 1
The punch slide sensor won’t
turn On when home position
has been moved by 30 mm.
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.
Punch slide motor and punch PWB (YC3)
Punch slide sensor and punch PWB (YC6)
Punch PWB (YC1) and DF main PWB (YC7)
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.
Punch slide motor and punch PWB (YC3)
Punch slide sensor and punch PWB (YC6)
Punch PWB (YC1) and DF main PWB (YC8)
Defective slide
sensor.
Replace the punch slide sensor.
Defective punch
slide motor.
Replace the punch slide motor.
Defective PWB. Replace the punch PWB or DF main PWB
and check for correct operation.
8420 Punch slide motor error 2
In detection of paper edges,
the paper edge cannot be
detected in 30 mm move.
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.
Punch slide motor and punch PWB (YC3)
Punch PWB (YC1) and DF main PWB (YC7)
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.
Punch slide motor and punch PWB (YC3)
Punch PWB (YC1) and DF main PWB (YC8)
Defective punch
slide motor.
Replace the punch slide motor.
Defective PWB. Replace the punch PWB or DF main PWB
and check for correct operation.
Code Contents Causes
Check procedures/
corrective measures
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