Symptom: Copy Jam - General
Check
Action if Yes
Action if No
6. Is the paper size sensor
(upper/lower) outputting
the correct signals for the
installed actuator? The
signals that should be
seen are shown in the
following table.
If you suspect that the FCU
or PFU is processing the
sensor signals wrongly,
change the FCU and/or PFU.
Change the sensor.
FCU Connector (Upper Cassette)
32-4 32-3 32-2
PFU Connector (Lower Cassette)
4-6 4-5 4-4
A5
L L L
Letter
H L L
A4
L H L
F, F4
L H H
Legal
H H L
B4
H L H
7. Are the connections
between the FCU and the
main motor loose?
Connect the cables properly.
Go to step 8.
8. Does the main motor
work?
Go to step 10.
Go to step 9.
9. Does the FCU output
power and drive signals
to the main motor?
Replace the main motor.
Replace the FCU.
10. Do the upper/lower paper feed motors and clutches work? See steps 10 to 14 of "Non-
feed".
Symptom: Copy jam in the paper feed entrance (error code 9-07)
Check
Action if Yes
Action if No
1. Clean the rollers in the paper feed entrance. Replace any defective rollers
2. Check the registration sensor and lower paper feed sensor (see steps 3 and 4 of "Copy
jam - General").
3. Do the upper/lower paper feed motors and clutches work? See steps 10 to 14 of "Non-
feed".
Symptom: Copy jam inside the machine (error code 9-08)
Check
Action if Yes
Action if No
1. Clean the registration rollers (metal rollers - soft cloth and alcohol, rubber rollers - soft
cloth and water).
Check the paper feed path and mechanism, especially the area around the entrance to
the transfer/fusing unit.
Check the fusing unit drive mechanism. Replace the pressure springs or fusing unit
rollers or gears if necessary.
2. Check the registration sensor and copy feed-out sensor (see steps 3 and 4 of "Copy jam -
General").
T
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TROUBLESHOOTING
1st August, 1994
MECHANICAL PROBLEMS
6-17