Oki Data CONFIDENTIAL
45487001TH Rev.1
6-48 /
6. Troubleshooting procedure
6.5.2.(3) Paper feed jam (Error 391: 1st Tray).
(3-1) Jamoccursimmediatelyafterthepoweristurnedon.(1sttray)
Check item Check work
Actions to be taken
at NG
(3-1-1) Check condition of the paper running path
Paper running path
of the front unit
Open the front cover check if paper is not
jammed in the paper running path.
Remove the
jammed paper.
(3-1-2) Check condition of the mechanical parts
Check the sensor
levers of the paper
entrance sensor
1 and the paper
entrance sensor 2.
Check if shape and movement of the sensor
levers have any abnormality or not.
Replace the
sensor lever
with the good
sensor lever.
(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 Maintenance Menu
SWITCH SCAN function.
Replace either
the PU/CU
board or the
front sensor
board (HSC-
2 PCB) or
connection
cable.
Check output signal
level of the paper
entrance sensor
1 and that of the
paper entrance
sensor 2.
Check for the following signals at the FSNS
connector
of the PU/CU board.
Pin-4: Paper entrance sensor 1
Pin-3: Paper entrance sensor 2
Confirm that the above signal levels change
when the sensor lever is operated.
Replace the
front sensor
board (HSC-2
PCB)
Check the power
voltages supplied
to the front sensor
board (HSC-2
PCB)
Check the 5V power at the FSNS connector
of the front sensor board (HSC-2 PCB).
Pin-1: 5V power supply
Pin-5: 0VL
Replace the
connection
cable.
(3-2) Jamoccursimmediatelyafterthepaperfeedisstarted.(1sttray)
Check item Check work
Actions to be taken
at NG
(3-2-1) Check condition of the paper running path
Paper running path
of the front unit
Check if paper is jammed or not in the paper
running path.
Remove the
jammed paper.
(3-2-2) Check condition of the mechanical parts
Check the sensor
levers of the paper
entrance sensor
1 and the paper
entrance sensor 2.
Check if shape and movement of the sensor
levers have any abnormality or not.
Replace the
sensor with the
good sensor
lever.
Check the feed
roller, pickup roller
and the retard roller
assembly of the
tray.
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 or the pickup roller has
worn out or not.
Replace the
feed roller, the
pickup roller and
the retard roller
assembly of the
tray.
(3-2-3) Motor operation check
Paper feed motor Confirm that the paper feed motor works
normally by using the Motor & Clutch Test of
the self-diagnostic mode.
Replace the PU/
CU board or
the paper feed
motor.
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