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Oki Data CONFIDENTIAL
44158801TH Rev.2
241 /
(4-2) Paper feed jam occurs right after paper feeding starts (Multi-purpose Tray)
Confirmation Items
Confirmation Tasks
Action at NG
(4-2-1) Check of state of running route
Paper running route in
multi-purpose tray
Check to see if there is paper jammed on the running
route.
Remove the jammed
paper.
Sheet receive (reed) of
multi-purpose tray
Check to see if the sheet receive is always located in the
upper position.
Modify the tray,
so that the sheet
receive will be raised
to the prescribed
position.
(4-2-2) Confirm condition of mechanical parts
Check sensor levers at the
entrance sensor 2 and
WR sensor lever
Check to see if the sensor levers demonstrate any
abnormal shape or motion.
Replace the sensor
lever with a normal
one.
Planetary gears for paper
feed control
Conduct the Motor and Clutch Test of the self-diagnostic
mode, and actuate the feed motor (FRONT MOTOR) to
make sure that both of the planetary gears rotate in their
lower positions. (The planetary gear box is the right-hand
white molded section, which is accessible by opening
the front cover.)
Replace the
planetary gear box.
Front cover
Check to see if the right and left locks of the front cover
are properly locked.
Replace the front
unit.
(4-2-3) Check of the 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.
Exchange a PU
board (PRF PCB) or
paper 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
Exchange a PU
board (PRF PCB)
(4-2-4) Check of connections
Feed motor drive cord
Check a connection status of the cord.
HOPKID connector of the PU board (PRF PCB).
Check half connection, incomplete plug-in or installation
status of the cord by eyes.
Correct the
connection properly.
Replace the cord
with a normal one.
Cord to drive a paper feed
motor
Check to make sure that the cord is not caught under any
assembled part of the printer. Unplug the HOP connector
of the PU PCB (PRF PCB), and confirm the following on
the cord side:
Short-circuiting between pin 1 and FG
Short-circuiting between pin 2 and FG
Short-circuiting between pin 3 and FG
Short-circuiting between pin 4 and FG
Return the
installation to a right
status by exchanging
a cord.
Feed motor
Confirm 3.5 of resistance is seen between 5pin-6pin,
and 7pin-8pin each at the cord side after pulling out
HOPKID connector of the PU board (PRF PCB).
Replace the feed
motor