44015503TH Rev. 1
201 /
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURE
(8-3) Two-sided printing jam occurs in the process of reversing paper.
Check item Check work
Action to be taken
at NG
(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.
Replace the
Dup-IN sensor
lever
DUP-IN sensor Confirm that the sensor signals are normally
detected by using the SWITCH SCAN function
of the self-diagnostic mode.
Replace the
Duplex board
(
V7Y PCB),
or replace the
defective sensor
or connection
cable.
(8-3-2) Motor operation check
Duple
x 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.
Replace the
planetary gear.
(8-4) Two-sided printing jam occurs during transporting paper inside the Duplex unit.
Check item Check work
Action to be taken
at NG
(8-4-1) Sensor lever operation check
Dup-R, Dup-F
sensor le
ver
Remove the Duplex unit and check movement of
the sensor lever.
Replace the
sensor lever.
(8-4-2) Sensor check
Check the detection
condition of the
sensor signal
Confirm that the sensor signals are normally
detected by using the SWITCH SCAN function
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.
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 Check work
Action to be taken
at NG
(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.
Replace the
V
7Y board or
clutch.
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