Oki Data CONFIDENTIAL
45487001TH Rev.1
6-57 /
6. Troubleshooting procedure
Check item Check work
Actions to be taken
at NG
(8-2-3) 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.
(8-3) Two-sided printing jam occurs during transporting paper inside the Duplex unit.
Check item Check work
Actions to be taken
at NG
(8-3-1) 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.
(8-3-2) 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
PU/CU board
or replace
the defective
sensor or
connection
cable.
(8-4) Paper is not supplied from the Duplex unit to the regist roller.
Check item Check work
Actions to be taken
at NG
(8-4-1) Clutch operation check
Duplex clutch Confirm that the Duplex clutch works normally
by using the Motor & Clutch Test of the self-
diagnostic mode.Confirm it by listening to the
sound.
Replace the
PU/CU board
or clutch.
6.5.2.(9) Paper size error (Errors 400 and 401)
(9-1) JamoccurswhenpaperendislocatedneartheIN1sensor.
Check item Check work
Actions to be taken
at NG
(9-1-1) Check paper feed condition
Multifeed of papers Open the front cover and check if multifeed of
papers 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 the
sensor lever
with the good
sensor lever.
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