2L6/2N6/2N5/2N4
1-4-181
8300 Center-folding unit commu-
nication error
(4000-sheet finisher)
Communication with the cen-
ter-folding unit is not possible.
CF unit set switch
1. Execute U241 Booklet - Set to check the
finisher switch (see page 1-3-136).
2. Check that the switch 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.
CF main PWB (YC7) and DF main PWB
(YC9)
4. If the wiring is disconnected, shorted or
grounded, replace the wiring.
5. Replace the CF unit set switch.
CF main PWB Replace the CF main PWB
DF main PWB Replace the DF main PWB (Refer to the
service manual for the document finisher).
8310 CF side registration motor 2
error
(4000-sheet finisher)
When initial operation, CF
side registration sensor 2
does not turn on within 1 s.
CF side registration
motor 2
1. Execute Motor - Width Test of U240
finisher operation check (see page 1-3-
134).
2. Manipulate the side registration upper
guide back and forth to check it can
smoothly move back and forth.
3. Check that the drive from the motor
reaches the side registration upper
guide.
4. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
CF side registration motor 2 and CF
main PWB (YC10)
5. If the wiring is disconnected, shorted or
grounded, replace the wiring.
6. Replace the CF side registration motor.
CF side registration
sensor 2
1. Execute U241 Booklet - Width Up HP to
check the finisher switch (see page 1-3-
136).
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.
CF side registration sensor 2 and CF
main PWB (YC20)
4. Replace the CF side registration sensor
2.
CF main PWB Replace the CF main PWB
Code Contents Related parts
Check procedures/
corrective measures
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