Utax AK 740, Service Manual

Page: 85 / 207

3N0/3NK/3PD/3PG
1-4-40
8420 Punch slide motor error 2
In detection of paper edges,
the paper edge cannot be
detected in 30 mm move.
Punch slide motor
1. Execute U240 Booklet - Punch Move to
check the finisher operation (see page
1-3-7).
2. Manipulate the punch slide part of the
punch unit back and forth to check it can
smoothly move.
3. Check that the drive from the motor
reaches punch part.
4. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Punch slide motor and Punch PWB
(YC3)
5. If the wiring is disconnected, shorted or
grounded, replace the wiring.
6. Replace the punch slide motor.
Punch paper edge
sensor 1,2
1. Execute U241 Punch - Edge Face
1,2,3,4 to check the finisher switch (see
page 1-3-9).
2. Check that the sensor and its mounting
bracket are correctly positioned.
3. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Punch paper edge sensor 1,2 and
Punch PWB (YC5,YC7)
4. Replace the punch paper edge sensor
1,2.
Punch PWB
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Punch PWB (YC1) and DF main PWB
(YC7)
2. Replace the Punch PWB.
DF main PWB Replace the DF main PWB. (see page 1-5-2)
Code Contents Causes
Check procedures/
corrective measures