Oki MC362w Maintenance Manual page 258

Oki Data CONFIDENTIAL
(4-2) Jam occurs immediately after the paper feed is started.
Check item
(4-2-1) Check condition of the paper running path
Paper running path Check if paper is jammed or not in the paper
of the front unit running path.
(4-2-2) Check condition of the mechanical parts
Hopping sensor, Check the sensor lever shapes and
IN sensor and WR operations for any problem
sensor lever check
(4-2-3) 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.
Paper feed motor Pull out the CU/PU board HOP connector
①
driver , and check the following at the side of
the connector:
Several M between pin-1 – FG
Several M between pin-2 – FG
Several M between pin-3 – FG
Several M between pin-4 – FG
44952001TH Rev.2
Checking method Action in case of NG
Remove the jammed
paper.
Replace the sensor
lever(s) with proper
one(s).
Replace the CU/
PU board or the feed
motor.
Replace the CU/PU
board.
Check item Checking method
(4-2-4) Check the system connection
Paper feed motor Check the connection condition of the cable.
drive cable Check if the connector is connected in
the half-way only or not, and check if the
connector is inserted in a slanted angle or
not. Check also that cables are assembled
without any abnormality.
Paper feed motor Check that any cable is not pinched during
drive cable assembling of the printer.
Pull out the CU/PU board HOP connector
and check the following at side of the cord:
Short circuit between pin-1 – FG
Short circuit between pin-2 – FG
Short circuit between pin-3 – FG
Short circuit between pin-4 – FG
Paper feed motor Pull out the CU/PU board HOP connector
and check whether there is a resistance of
approximately 3.4
1 and 2, and between the pins 3 and 4, at
the cord side.
7. TROUBLESHOOTING PROCEDURES
Action in case of NG
Replace the cable
with the good cable
that normalizes the
connection condition.
Replace the cable
with the good cable
①
, that normalizes the
connection condition.
①
, Replace the paper
feed motor.
or 5 between the pins
7-66