Two-Sided Printing Jam Occurs In The Process Of Reversing Paper; Two-Sided Printing Jam Occurs During Transporting Paper Inside The Duplex Unit; Paper Is Not Supplied From The Duplex Unit To The Regist Roller - Oki C810 Maintenance Manual

Oki Data CONFIDENTIAL

(8-3) Two-sided printing jam occurs in the process of reversing paper.

Check item
(8-3-1) Sensor lever operation check
Dup-IN sensor lever Open the rear cover. Touch the Dup-IN sensor
lever to check if its movement is unsmooth or
not.
DUP-IN sensor Confirm that the sensor signals are normally
detected by using the SWITCH SCAN function
of the self-diagnostic mode.
(8-3-2) Motor operation check
Duplex motor Check if the paper reversing operation is started
or not by visual inspection when viewing through
slit of the rear cover.
If the paper reversing operation is not started,
check if movement of the planetary gear inside
the Duplex unit is unsmooth or not.

(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
sensor signal of 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.
44015503TH Rev. 1
Action to be taken
Check work
at NG
Replace the
Dup-IN sensor
lever
Replace the
Duplex board
(v7y PCB),
or replace the
defective sensor
or connection
cable.
Replace the
planetary gear.
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.

(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.
7. TROUBLESHOOTING PROCEDURE
Action to be taken
Check work
at NG
Replace the
v7y board or
clutch.
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