
Oki Data CONFIDENTIAL
44158801TH Rev.2
238 /
8.5.2.(3)
Paper Feed Jam(Error 391:1st Tray)
(3-1) Paper feed jam occurs right after turning on the power (1st Tray)
Confirmation Items
Confirmation Tasks
Action at NG
(3-1-1) Check of state of running route
Paper running route in front
unit
Open the front cover, and check to see if there is paper
jammed on the running route.
Remove the jammed
paper
(3-1-2) Check of state of mechanical parts
Check the sensor levers of
inlet sensors 1 and 2.
Check to see if the sensor levers demonstrate any
abnormal shape or motion.
Replace the sensor
lever with a normal
one.
(3-1-3) Check of electrical parts
Check the state of sensor
signal detection.
Use the SWITCH SCAN function of the Maintenance
Menu to check to see if the sensor signal is detected
normally.
Replace the PU
PCB (PRF PCB),
front sensor PCB
(RSF PCB) or the
connection cord.
Check the output levels of
inlet sensors 1 and 2
Check the following signals through the FSNS connector
of the PU PCB (PRF PCB).
Pin 4: Inlet sensor 1
Pin 3: Inlet sensor 2
Confirm that the above signal levels vary as the sensor
levers are actuated.
Replace the front
sensor PCB (RSF
PCB).
Check the power supply of
the front sensor PCB (RSF
PCB).
Check the 5-V power through the CN connector of the
front sensor PCB (RSF PCB).
Pin 5: 5V power
Pin 1: 0VL
Replace the
connection cord.
(3-2) Paper feed jam occurs right after paper feeding starts (1st Tray)
Confirmation Items
Confirmation Tasks
Action at NG
(3-2-1) Check of state of running route
Paper running route in front
unit
Check to see if there is paper jammed on the running
route.
Remove the jammed
paper.
(3-2-2) Check of state of mechanical parts
Check the sensor levers of
inlet sensors 1 and 2.
Check to see if the sensor levers demonstrate any
abnormal shape or motion.
Replace the sensor
lever with a normal
one.
(3-2-3) Check of operating state of motors
Feed motor
Conduct the Motor and Clutch Test of the self-diagnostic
mode, and check to see if the feed motor operates
normally.
Replace the PU
PCB (PRF PCB) or
feed motor.
Feed motor driver
Unplug the HOP connector of the PU PCB (PRF PCB),
and confirm the following on the connector side:
Several Mohms between pin 1 and FG
Several Mohms between pin 2 and FG
Several Mohms between pin 3 and FG
Several Mohms between pin 4 and FG
Replace the PU
PCB (PRF PCB).