Duplex Printing Jam Occurs During Transporting Paper Inside The Duplex Unit; Paper Is Not Supplied From The Duplex Unit To The Timing Roller; Paper Size Error (Errors 400 And 401); Jam Occurs When Paper End Is Located Near The In1 Sensor - Oki C911 Maintenance Manual

Oki Data CONFIDENTIAL
Check item
(9-2-3) Check condition of the paper running path
Paper inverting Check that any foreign materials such as
transport path paper chip or blue do not exist that hampers
the smooth movement of paper in the paper
inverting transport path.
Decurl Assy Check if paper winds around the Decurl unit.
(9-3)

Duplex printing jam occurs during transporting paper inside the Duplex unit.

Check item
(9-3-1) Sensor lever operation check
Dup-F sensor lever Remove the Duplex unit and check movement
of the Dup-F sensor lever.
Dup-R sensor lever Remove the Duplex unit and check movement
of the Dup-R sensor lever.
(9-3-2) Sensor check
Check the detection Check the sensitivity of each sensor in the
condition of the two conditions: one is the status in which
sensor signal 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.
(9-4)

Paper is not supplied from the Duplex unit to the timing roller.

Check item
(9-4-1) Clutch operation check
Duplex hopping Confirm that the Duplex hopping clutch works
clutch normally by using the Motor & Clutch Test
of the self-diagnostic mode.Confirm it by
listening to the sound.
45530603TH Rev.2
Actions to be taken
Check work
at NG
Remove
the foreign
material.
Remove the
winds paper.
Actions to be taken
Check work
at NG
Replace the
Dup-F sensor
lever.
Replace the
Dup-R sensor
lever.
Replace the
Duplex PCB,
faulty sensor,
or connection
cable.
Actions to be taken
Check work
at NG
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
(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.
Paper size Does the paper size specified for print match
the paper size of paper stuck in the tray.
Paper entrance Check if shape and movement of the sensor
sensor 1, paper levers have any abnormality or not.
entrance sensor 2
4. TROUBLESHOOTING PROCEDURE
Actions to be taken
Check work
at NG
If multi-feed
occurs again
after the
jammed paper
is removed,
replace the
retard roller of
the tray in use.
Change the
specified paper
size or size of
paper inside
the tray.
Replace with a
normal sensor
lever.
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