Paper Feed Jam Occurs Right After Paper Feeding Starts (Multi-Purpose Tray) - Oki C5500 Maintenance Manual

(4-2)Paper feed jam occurs right after paper feeding starts (Multi-purpose Tray)

Confirmation Items
(4-2-1) Check of state of running route
Paper running route in multi-
purpose tray
Sheet receive (reed) of multi-
purpose tray
(4-2-2)Confirm condition of mechanical parts
Check sensor levers at the
entrance sensor 2 and WR
sensor lever
Planetary gears for paper
feed control
Front cover
(4-2-3) Check of the operating state of motors
Feed motor
Feed motor driver
(4-2-4) Check of connections
Feed motor drive cord
Cord to drive a paper feed
motor
Feed motor
43085101TH Rev.1
Confirmation Tasks
Check to see if there is paper jammed on the running route.
Check to see if the sheet receive is always located in the upper
position.
Check to see if the sensor levers demonstrate any abnormal
shape or motion.
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.)
Check to see if the right and left locks of the front cover are
properly locked.
Conduct the Motor and Clutch Test of the self-diagnostic mode,
and check to see if the feed motor operates normally.
Unplug the HOP connector of the PU PCB (PRX 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
Check a connection status of the cord.
HOPKID connector of the PU board (PRN PCB).
Check half connection, incomplete plug-in or installation status
of the cord by eyes.
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 (PRX 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
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 (PRN PCB).
Oki Data CONFIDENTIAL
Action at NG
Remove the jammed
paper.
Modify the tray, so that
the sheet receive will
be raised to the
prescribed position.
Replace the sensor
lever with a normal
one.
Replace the planetary
gear box.
Replace the front unit.
Exchange a PU board
(PRN PCB) or paper
feed motor.
Exchange a PU board
(PRN PCB)
Correct the connection
properly.
Replace the cord with a
normal one.
Return the installation
to a right status by
exchanging a cord.
Replace the feed motor
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