Oki Data CONFIDENTIAL
45850101TH Rev.1
2-57
2. TROUBLESHOOTING PROCEDURES
2.5.5. (3-3) Paper feed jam (Error code 390: Multipurpose tray)
(3-3-1) Jam occurs immediately after the power is turned on. (Multipurpose tray)
Check item
Check work
Actions to be taken
at NG
(3-3-1-1) Check condition of the paper running path
Paper running path
of the multipurpose
tray
Check if paper is jammed or not in the paper
running path.
Remove the
jammed paper.
(Refer to
the following
process)
(3-3-1-2) Check condition of the mechanical parts
Check the sensor
levers of the IN2
sensor and the WR
sensor.
Check if shape and movement of the sensor
levers have any abnormality or not.
Replace the
sensor with the
good sensor
lever.
(3-3-1-3) Check condition of electrical parts
Check the detection
condition of the
sensor signal.
Confirm that the sensor signals are normally
detected by using the SWITCH SCAN function of
the self-diagnostic mode.
Replace either
the CU/PU board
or the front
sensor board
(RSG PCB)
or connection
cable.
Check the sensor
output signal level of
the IN2 sensor and
the WR sensor.
Check for the following signals at the FSNS
connector of the CU/PU board.
Pin-2: WR sensor
Pin-3: IN2 sensor
Confirm that the above signal levels change
when the sensor lever is operated.
Replace the
front sensor
board (RSG
PCB)
Check the power
voltages supplied
to the front sensor
board (RSG PCB)
Check the 5V power at the FSNS connector of
the front sensor board (RSG PCB).
Pin-1: 5V power supply
Pin-5: 0VL
Replace the
connection
cable.
(3-3-2) Jam occurs immediately after paper feed is started. (Multipurpose tray)
Check item
Check work
Actions to be taken
at NG
(3-3-2-1) Check condition of the paper running path
Paper running path
of the multipurpose
tray
Check if paper is jammed or not in the paper
running path.
Remove the
jammed paper.
(Refer to the
following process)
Sheet Receive of the
multipurpose tray
Confirm that the Sheet Receive has moved up
normally.
Confirm that the support spindle and spring of
the Sheet Receive have been installed in the
specified positions normally.
Correct installa-
tion of the above
parts so that the
Sheet Receive
moves up to the
specified posi-
tion normally.
(3-3-2-2) Check condition of the mechanical parts
Check the sensor
levers of the IN2
sensor and the WR
sensor.
Check if shape and movement of the sensor
levers have any abnormality or not.
Replace the
sensor with the
good sensor
lever.
Front cover
Confirm that the locks in the right and left of the
front cover are locked normally.
Replace the font
cover assembly
Check the feed
roller, the pickup
roller, and the retard
roller.
Check if any foreign materials such as paper
dust on the surface of the feed roller or of the
pickup roller or not.
Remove the
foreign material.
Check if the feed roller has worn out or not.
Replace the feed
roller.
(3-3-2-3) Motor operation check
Hopping motor
Confirm that the hopping motor works normally
by using the Motor & Clutch Test of the self-
diagnostic mode.
Replace the
CU/PU board,
or replace the
hopping motor.
Hopping motor driver
Remove the MOTERCL connector of the CU/PU
board and check the following at the connector
side.
Several M
Ω
between pin-5 – FG.
Several M
Ω
between pin-6 – FG.
Several M
Ω
between pin-7 – FG.
Several M
Ω
between pin-8 – FG.
Replace the CU/
PU board.
MPT clutch
Carry out Motor & Clutch Test to check if the
MPT clutch works normally.
