45530603TH Rev.2
4-71
Oki Data CONFIDENTIAL
4. TROUBLESHOOTING PROCEDURE
Check item Check work
Actions to be taken
at NG
(9-2-3) Check condition of the paper running path
Paper inverting
transport path
Check that any foreign materials such as
paper chip or blue do not exist that hampers
the smooth movement of paper in the paper
inverting transport path.
Remove
the foreign
material.
Decurl Assy
Check if paper winds around the Decurl unit.
Remove the
winds paper.
(9-3) Duplex printing jam occurs during transporting paper inside the Duplex unit.
Check item Check work
Actions to be taken
at NG
(9-3-1) Sensor lever operation check
Dup-F sensor lever Remove the Duplex unit and check movement
of the Dup-F sensor lever.
Replace the
Dup-F sensor
lever.
Dup-R sensor lever Remove the Duplex unit and check movement
of the Dup-R sensor lever.
Replace the
Dup-R sensor
lever.
(9-3-2) Sensor check
Check the detection
condition of the
sensor signal
Check the sensitivity of each sensor in the
two conditions: one is the status in which
paper remains in the duplex unit, and the
other is the status in which no paper remains
in the duplex unit.
Confirm that the sensor signals are normally
detected by using the SWITCH SCAN
function of the self-diagnostic mode.
Replace the
Duplex PCB,
faulty sensor,
or connection
cable.
(9-4) Paper is not supplied from the Duplex unit to the timing roller.
Check item Check work
Actions to be taken
at NG
(9-4-1) Clutch operation check
Duplex hopping
clutch
Confirm that the Duplex hopping clutch works
normally by using the Motor & Clutch Test
of the self-diagnostic mode.Confirm it by
listening to the sound.
Replace the
Duplex PCB or
clutch.
4.5.2.(10) Paper size error (Errors 400 and 401)
(10-1) Jam occurs when paper end is located near the IN1 sensor.
Check item Check work
Actions to be taken
at NG
(10-1-1) Check paper feed condition
Multifeed of paper Open the right side cover and check if multi-
feed of paper occurs or not.
If multi-feed
occurs again
after the
jammed paper
is removed,
replace the
retard roller of
the tray in use.
Paper size Does the paper size specified for print match
the paper size of paper stuck in the tray.
Change the
specified paper
size or size of
paper inside
the tray.
Paper entrance
sensor 1, paper
entrance sensor 2
Check if shape and movement of the sensor
levers have any abnormality or not.
Replace with a
normal sensor
lever.
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