Duplex Print Jam(Error 370,371,372,373,383); Duplex Print Jam Occurs Right After Turning On The Power; Duplex Print Jam Occurs In The Duplex Entry - Oki c5550 Maintenance Manual

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
(7-1-1) Check of state of running route
Paper running route in
duplex unit
(7-1-2) Check of state of mechanical parts
Check the sensor levers of
the sensors of Duplex.
(7-1-3) Check of electrical parts
Check the state of sensor
signal detection.

(7-2) Duplex print jam occurs in the Duplex entry

Confirmation Items
(7-2-1) Check of operating state of solenoid
Duplex solenoid
Separator DUP (Delivery/
DUP-intake switching gate
located immediately after
fuser unit)
On/off timing of duplex
solenoid
(7-2-2) Check of operating state of sensor lever
Dup-IN sensor lever
Dup-IN sensor
(7-2-3) Check of state of running route
Reversal transport path
44158801TH Rev.2
Confirmation Tasks
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.
Check to see if the sensor levers demonstrate any
abnormal shape or motion.
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.
Confirmation Tasks
Conduct the Motor and Clutch Test of the self-diagnostic
mode, and check the operating state of the Duplex solenoid.
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.
Conduct test print with the cover open, and see if the
separator DUP opens at the right timing.
Open the rear cover, touch the Dup-IN sensor lever by
hand, and see if its motion is stiff.
Use the SWITCH SCAN function of the self-diagnostic
mode to check to see if the sensor signals are detected
normally.
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.
Oki Data CONFIDENTIAL
Action at NG
Remove the jammed
paper.
Replace the sensor
lever with a normal
one.
Replace the
Duplex PCB (V7Y
PCB), sensors or
connection cord.
Action at NG
Replace the V7Y
PCB or solenoid.
Replace the
separator DUP.
Replace the WR
sensor lever or
solenoid.
Replace the Dup-IN
sensor lever.
Replace the
duplex PCB (V7Y
PCB), sensors or
connection cord.
Remove the foreign
matters.
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