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 C301 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-R sensor Open the rear cover. Touch the Dup-IN sensor
lever to check if its movement is unsmooth or
lever
not.
DUP-R 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
Fuser motor Visually check whether paper started being
reversed.
When no paper reversing operation has
performed, check whether the planet gear
at the lower right side of the fuser moves
smoothly.

(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 Open the top cover, remove the image drums
sensor lever
and the belt unit and check the operation of
the DUP-F 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.
Check sensor detection with paper in the duplex
unit, and with it removed from the duplex unit.
44951501TH Rev.2
Check operation Actions for NG
results
Replace the
DUP-R sensor
lever
Replace the
CU/PU board,
the sensor or its
connection cord.
Replace the
planetary gear.
Check operation Actions for NG
results
Replace the
sensor lever.
Replace the
CU/PU board,
appropriate
sensor(s) or
connection
cord(s).

(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
Check operation Actions for NG
results
Replace the
CU/PU board
or the clutch.
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