44952001TH Rev.2
7-67
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
7.5.5.(5)Paperfeedjam(errorcode390:Multipurposetray)
(5-1) Jam occurs immediately after the power is turned on. (Multipurpose tray)
Check item Checking method Action in case of NG
(5-1-1) Check condition of the paper running path
Paper running path
of the multipurpose
tray
Checkifpaperisjammedornotinthepaper
running path.
Removethejammed
paper.
(5-1-2) Check condition of the mechanical parts
IN sensor and WR
sensor lever check
Check the sensor lever shapes and
operations for any problem
Replace the sensor
lever(s) with proper
one(s)
(5-1-3) Check condition of electrical parts
Check the detection
condition of the
sensor signal.
Confirm that the sensor signals are normally
detected by using the SWITCH SCAN
function of the self-diagnostic mode.
Replace the CU/PU
board, or appropriate
sensor(s) or
connection cord(s).
In sensor and WR
sensor output level
check
Check the following signals by using the
CU/PU board RGSNS connector
⑯
:
Pin 2: WR sensor
Pin 5: IN sensor
Confirm that the above signal levels change
when the sensor lever is operated.
Replace the
connection cable.
(5-2) Jam occurs immediately after paper feed is started. (Multipurpose tray)
Check item Checking method Action in case of NG
(5-2-1) Check condition of the paper running path
Paper running path
of the multipurpose
tray
Checkifpaperisjammedornotinthepaper
running path.
Removethejammed
paper.
Sheet Receive of the
multipurpose tray
Confirm that the Sheet Receive has moved
up normally.
Confirm that the support spindle and spring
of the Sheet Receive have been installed in
the specified positions normally.
Correct installation
of the above parts
so that the Sheet
Receive moves up to
the specified position
normally.
(5-2-2) Check condition of the mechanical parts
IN sensor and WR
sensor lever check
Check the sensor lever shapes and
operations for any problem
Replace the sensor
lever(s) with proper
one(s).
Front cover Confirm that the locks in the right and left of
the front cover are locked normally.
Replace the font cover
assembly
Check the feed roller
and the pickup roller.
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 has worn out or not. Replace the feed
roller.
(5-2-3) 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 CU/
PU board or the feed
motor.
Paper feed motor
driver
Pull out the CU/PU board HOP connector
①
,
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
Replace the CU/PU
board.
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