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Oki Data CONFIDENTIAL
44158801TH Rev.2
249 /
8.5.2.(7)
Duplex Print Jam(Error 370,371,372,373,383)
(7-1) Duplex print jam occurs right after turning on the power
Confirmation Items
Confirmation Tasks
Action at NG
(7-1-1) Check of state of running route
Paper running route in
duplex unit
Check to see if there is paper jammed on the running route.
Open the front cover and see if there is paper jammed in
the middle of feeding through the Duplex. Open the rear
cover and see if there is paper jammed in the reversal
path.
Draw out the Duplex and see if there is paper jammed at
the insertion inlet to the Duplex. Open the running path
cover of the Duplex and see if there is paper jammed
inside.
Remove the jammed
paper.
(7-1-2) Check of state of mechanical parts
Check the sensor levers of
the sensors of Duplex.
Check to see if the sensor levers demonstrate any
abnormal shape or motion.
Replace the sensor
lever with a normal
one.
(7-1-3) Check of electrical parts
Check the state of sensor
signal detection.
Use the SWITCH SCAN function of the self-diagnostic
mode to check to see if the sensor signals are detected
normally.
Check the state of signal detection in two cases: With a
sheet of paper placed inside the duplex unit and with the
paper removed.
Replace the
Duplex PCB (V7Y
PCB), sensors or
connection cord.
(7-2) Duplex print jam occurs in the Duplex entry
Confirmation Items
Confirmation Tasks
Action at NG
(7-2-1) Check of operating state of solenoid
Duplex solenoid
Conduct the Motor and Clutch Test of the self-diagnostic
mode, and check the operating state of the Duplex solenoid.
Replace the V7Y
PCB or solenoid.
Separator DUP (Delivery/
DUP-intake switching gate
located immediately after
fuser unit)
Conduct the Motor and Clutch Test of the self-diagnostic
mode, and check visually the motion of the gate (EXIT
SOLENOID). See if its motion is stiff, or its amount of
opening/closing is abnormal.
Replace the
separator DUP.
On/off timing of duplex
solenoid
Conduct test print with the cover open, and see if the
separator DUP opens at the right timing.
Replace the WR
sensor lever or
solenoid.
(7-2-2) Check of operating state of sensor lever
Dup-IN sensor lever
Open the rear cover, touch the Dup-IN sensor lever by
hand, and see if its motion is stiff.
Replace the Dup-IN
sensor lever.
Dup-IN sensor
Use the SWITCH SCAN function of the self-diagnostic
mode to check to see if the sensor signals are detected
normally.
Replace the
duplex PCB (V7Y
PCB), sensors or
connection cord.
(7-2-3) Check of state of running route
Reversal transport path
Check to see if there are paper chips, burrs or any
other foreign matters in the reversal transport path that
obstruct the running of paper.
Remove the foreign
matters.