Two-Sided Printing Jam Occurs During Transporting Paper Inside The Duplex Unit; Paper Is Not Supplied From The Duplex Unit To The Regist Roller; Paper Size Error (Error Code 400); Jam Occurs When Paper End Is Located Near The In1 Sensor - Oki C610n Maintenance Manual

Oki Data CONFIDENTIAL

(8-4) Two-sided printing jam occurs during transporting paper inside the Duplex unit.

Check item
(8-4-1) Sensor lever operation check
Dup-R, Dup-F Remove the Duplex unit and check movement of
sensor lever the sensor lever.
(8-4-2) Sensor check
Check the detection Confirm that the sensor signals are normally
condition of the detected by using the SWITCH SCAN function of
sensor signal the self-diagnostic mode.
For all sensors except the Dup-IN sensor, check
the detection condition of the respective sensor
in the two status: One is the status in which
paper remains inside the Duplex unit. The other
is the status in which paper is removed from the
Duplex unit.

(8-5) Paper is not supplied from the Duplex unit to the regist roller.

Check item
(8-5-1) 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.
44205301TH Rev.1
Action to be taken
Check work
at NG
Replace the
sensor lever.
Replace the
Duplex board
(V7Y PCB),
or replace the
defective sensor
or connection
cable.
Action to be taken
Check work
at NG
Replace the V7Y
board or clutch.

7.5.2. (9) Paper size error (error code 400)

(9-1) Jam occurs when paper end is located near the IN1 sensor.

Check item
(9-1-1) Check paper feed condition
Multifeed of papers Open the front cover and check if multifeed of
papers 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 levers have any abnormality or not.
7. Troubleshooting and repair procedure
Action to be taken
Check work
at NG
If the multifeed
occurs again
after the
jammed paper
is removed,
replace the flap
of the tray in
use.
Change the
specified paper
size or size of
paper inside the
tray.
Replace the
sensor lever with
the good sensor
lever.
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