6) Paper Running Jam; Jam Occurs Immediately After The Power Is Turned On; Jam Occurs Immediately After A Paper Is Taken Into Printer - Oki MC860 Maintenance Manual

Oki Data CONFIDENTIAL
7.5.2.(6) Paper running jam (error code 381:

(6-1) Jam occurs immediately after the power is turned on.

Check item
(6-1-1) Check the condition of the paper running path
Paper running path Check if paper is jammed or not in the
of the front unit paper running path.
(6-1-2) Check condition of the mechanical parts
Check the sensor Check if shape and movement of the
lever of the WR sensor levers have any abnormality or not.
sensor.
(6-1-3) Check condition of electrical parts
Check the detection Confirm that the sensor signals are
condition of the normally detected by using the SWITCH
sensor signal. SCAN function of the self-diagnostic mode.
Check the sensor Check for the following signals at the FSNS
lever of the WR connector
sensor.
pin2: WR sensor
Confirm that the above signal levels change
when the sensor lever is operated.
Check the power Check the 5V power at the FSNS connector
voltages supplied of the front sensor PCB (RSF PCB).
to the front sensor
pin1: 5V power
PCB (RSF PCB)
pin5: 0VL

(6-2) Jam occurs immediately after a paper is taken into printer.

Check item
(6-2-1) Check the condition of the paper running path
Paper running path Remove the ID unit and check if paper is
on the belt. jammed or not in the paper running path.
43967002TH Rev. 1
Check work Action to be taken at NG
Remove the
jammed paper.
Replace the sensor
lever with the good
sensor lever.
Replace either the
PU PCB or the front
sensor PCB (RSF
PCB) or connection
cable.
Replace the front
of the PU PCB. sensor PCB (RSF
PCB)
Replace the
connection cable.
Check work Action to be taken at NG
Remove the
jammed paper.
Check item
(6-2-2) Check condition of the mechanical parts
Check the sensor Check if shape and movement of the
lever of the WR sensor levers have any abnormality or not.
sensor.
(6-2-3) Motor operation check
Paper feed motor, Confirm that the paper feed motor, belt
belt motor, ID motor motor and ID motor work normally by
using the Motor & Clutch Test of the self-
diagnostic mode.
Check if any extra load exists or not.
Paper feed motor Remove the HOPSIZE connector
driver, ID up motor PU PCB and check the followings at the
driver, belt motor connector side.
driver
Several MΩ between pin1 – FG.
Several MΩ between pin2 – FG.
Several MΩ between pin3 – FG.
Several MΩ between pin4 – FG.
Remove the HOPSIZE connector
PU PCB and check the followings at the
cable side.
Several MΩ between pin1 – FG.
Several MΩ between pin2 – FG.
Several MΩ between pin3 – FG.
Several MΩ between pin4 – FG.
7. Troubleshooting
Check work Action to be taken at NG
Replace the sensor
lever with the good
sensor lever.
Replace the PU
PCB, or replace
the defective motor
among paper feed
motor, belt motor and
ID motor, or replace
the ID unit or belt unit.
Replace the paper
feed motor, belt motor,
ID motor. Replace ID
unit, belt unit If any
attempt of using new
ID unit or new belt
unit as a trial is going
to be made, be sure
to use the System
Maintenance Menu
FUSE KEEP MODE.
of the Replace the PU
PCB, or replace
the defective motor
among paper feed
motor, belt motor
and ID motor, or
replace the ID unit
or belt unit.
of the
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