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3NC/3NB/3NK
1-4-19
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 slidemotor.
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 slidemotor.
Defective PWB.
Replace the punch PWB or DF main PWB
and check for correct operation.
8430
Punch unit communication
error
Communication with the
punch unit 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.
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 PWB (YC1) and DF main PWB (YC8)
Defective PWB.
Replace the punch PWB or the DF main
PWB and check for correct operation.
Code
Contents
Causes
Check procedures/
corrective measures
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Summary of Contents for PH-7A
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