Two-Sided Printing Jam Occurs During Taking In The Paper Into Duplex Unit; Two-Sided Printing Jam Occurs In The Process Of Reversing Paper - Oki MC860 Maintenance Manual

Oki Data CONFIDENTIAL

(8-2) Two-sided printing jam occurs during taking in the paper into Duplex unit.

Check item
(8-2-1) Solenoid operation check
Duplex solenoid Confirm that the Duplex solenoid works
normally by using the Motor & Clutch Test
of the self-diagnostic mode.
Separator DUP Check visually movement of the gate by
(Paper unloading/ using the Motor & Clutch Test of the self-
DUP paper taking- diagnostic mode. (EXIT SOLENOID) Check
in switching gate if movement is unsmooth or not, if amount
located immediately of open/close is abnormal or not.
after the fuser unit)
ON/OFF timing of While the cover is in the opened state,
the Duplex solenoid perform the test print and confirm if the
timing to open the separator DUP is correct
or not.
(8-2-2) 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.
(8-2-3) Check condition of the paper running path
Paper inverting Check that any foreign materials such
transport path as paper chip or blue do not exist that
hampers the smooth movement of paper in
the paper inverting transport path.
43967002TH Rev. 1
Check work Action to be taken at NG
V7Y PCB
replacement or solid
replacement
Replace the
separator DUP.
Replace the WR
sensor lever or
solenoid.
Replace the Dup-IN
sensor lever.
Replace the Duplex
PCB (V7Y PCB),
or replace the
defective sensor or
connection cable.
Remove the foreign
material.
Check item
(8-2-4) Motor operation check
Duplex motor Confirm that the Duplex solenoid works
normally by using the Motor & Clutch Test
of the self-diagnostic mode.
Open the rear cover and check rotation of
the roller.
Duplex pull-in/ Check if the pull-in/reversing roller of the
reversing roller and Duplex unit contacts or not with the pinch
its pinch roller roller of the cover side when the Duplex
rear cover is closed. (Does the pinch roller
rotate when the roller is rotating?

(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.
7. Troubleshooting
Check work Action to be taken at NG
V7Y PCB
replacement or
motor replacement.
Rear cover
replacement.
Check work Action to be taken at NG
Replace the Dup-IN
sensor lever.
Replace the Duplex
PCB (V7Y PCB),
or replace the
defective sensor or
connection cable.
Replace the
planetary gear.
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