Paper Running Jam (Error 381); Jam Occurs Immediately After The Power Is Turned On - Oki C911 Maintenance Manual

Oki Data CONFIDENTIAL
Check item
(6-1-3) Motor operation check
Hopping motor Confirm that the hopping motor works
normally by using the Motor & Clutch Test of
the self-diagnostic mode.
Hopping motor Confirm that the hopping motor works
driver normally by using the Motor & Clutch Test of
the self-diagnostic mode.
MPT clutch Remove the HOPM connector of the PU/CU
PCB and check the following at the connector
side.
1 M or more between pin-1/-2/-3/-4 and FG.
(6-1-4) Check the system connection
Hopping motor Check the connection condition of the cable.
drive cable Visually check if the connector is connected
in the half-way only or not, and check if the
connector is inserted in a slanted angle or not.
Also check that cables are assembled without
any abnormality.
Hopping motor Check that any cable is not pinched during
drive cable assembling of the printer.
Remove the HOPM connector of the PU/CU
PCB and check the following at the cable side.
Short circuit between pin-1/-2/-3/-4 and FG
Hopping motor Remove the HOPM connector of the PU/CU
PCB and check that a resistance of 10 or
less can be measured between pin-1 and pin-
2 and pin-3 and pin-4 respectively at the cable
side.
45530603TH Rev.2
Actions to be taken
Check work
at NG
Replace the
PU/CU PCB or
hopping motor.
Replace the
PU/CU PCB.
Normalize the
connection
condition.
Replace with a
normal cable.
Replace the
cable and
normalize the
assembled
condition.
Replace the
hopping motor.
4.5.2.(7)

Paper running jam (Error 381)

(7-1)

Jam occurs immediately after the power is turned on.

Check item
(7-1-1) Check condition of the running path.
Paper running Check if paper is jammed or not in the paper
path between the running path.
registration roller 2
and the fuser
(7-1-2) Check condition of the mechanical parts
Check the sensor Check if shape and movement of the sensor
lever of the paper levers have any abnormality or not.
entrance sensor 3.
(7-1-3) Check condition of electrical parts
Check the detection Confirm that the sensor signals are normally
condition of the detected by using the SWITCH SCAN
sensor signal. function of the self-diagnostic mode.
4. TROUBLESHOOTING PROCEDURE
Actions to be taken
Check work
at NG
Remove the
jammed paper.
Replace with a
normal sensor
lever.
Replace the
PU/CU PCB
or connection
cable.
4-66