8) Two-Sided Printing Jam (Error Code: 370, 371, 372, 373, 383); Two-Sided Printing Jam (Error Code: 370, 371, 372, 373, 383); Two-Sided Printing Jam Occurs Immediately After The Power Is Turned On; Two-Sided Printing Jam Occurs During Taking In The Paper Into Duplex Unit - Oki C810 Maintenance Manual

Oki Data CONFIDENTIAL
7.5.2.(8)

two-sided printing jam (error code: 370, 371, 372, 373, 383)

(8-1) Two-sided printing jam occurs immediately after the power is turned on.

Check item
(8-1-1) Check condition of the paper running path
Paper running path Check if paper is jammed or not in the paper
of the Duplex unit running path.
Open the front cover and check if any paper
remains in the Duplex feeder or not.
Open the rear cover and check if any paper
remains in the paper reversing path or not.
Remove the Duplex unit. Check if any paper
exists in the Duplex insertion slot or not. Open
the cover of the Duplex paper running path and
check if any paper remains inside of the Duplex
unit.
(8-1-2) Check condition of the mechanical parts
Check the sensor Check if shape and movement of the sensor
levers of the levers have any abnormality or not.
respective sensors
of the Duplex unit.
(8-1-3) Check condition of electrical parts
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
Remove the
jammed paper.
Replace the
sensor lever
with the good
sensor lever.
Replace the
Duplex board
(v7y PCB),
or replace the
defective sensor
or connection
cable.

(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 using
(Paper unloading/ the Motor & Clutch Test of the self-diagnostic
DUP paper taking- mode. (EXIT SOLENOID)
in switching gate Check if movement is unsmooth or not, if
located immediately amount of open/close is abnormal or not.
after the fuser unit)
ON/OFF timing of While the cover is in the opened state, perform
the Duplex solenoid 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 as
transport path paper chip or blue do not exist that hampers
the smooth movement of paper in the paper
inverting transport path.
(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 Duplex
reversing roller and unit contacts or not with the pinch roller of the
its pinch roller cover side when the Duplex rear cover is closed.
(Does the pinch roller rotate when the roller is
rotating?)
7. TROUBLESHOOTING PROCEDURE
Action to be taken
Check work
at NG
Replace the
v7y board or
solenoid.
Replace the
separator DUP.
Replace the WR
sensor lever or
solenoid.
Replace the
Dup-IN sensor
lever
Replace the
Duplex board
(v7y PCB),
or replace the
defective sensor
or connection
cable.
Remove the
foreign material.
Replace the
v7y board or
motor.
Replace the
rear cover.
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