2L6/2N6/2N5/2N4-3
1-4-184
8350 CF side registration motor 1 
error
(4000-sheet finisher)
When initial operation, CF 
side registration sensor 1 
does not turn on within 1 s.
CF side registration 
motor 1
1. Execute U240 Booklet - Width Test to 
check the finisher operation (see page 
1-3-134).
2. Manipulate the side registration lower 
guide back and forth to check it can 
smoothly operable.
3. Check that the drive from the motor 
reaches the side registration lower 
guide.
4. Confirm that the wiring connector is 
firmly connected and, if necessary, 
connect the connector all the way in.
CF side registration motor 1 and  CF 
main PWB (YC10)
5. If the wiring is disconnected, shorted or 
grounded, replace the wiring.
6. Replace the CF side registration motor 
1.
CF side registration 
sensor 1
1. Execute U241 Booklet - Width Down 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 1 and  CF 
main PWB (YC20)
4. Replace the CF side registration sensor 
1.
CF main PWB Replace the CF main PWB
Code Contents Related parts
Check procedures/
corrective measures