44952001TH Rev.2
7-64
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
7.5.5.(3)Paperfeedjam(errorcode391:1sttray)
(3-1) Jam occurs immediately after the power is turned on. (1st tray)
Check item Checking method Action in case of NG
(3-1-1) Check condition of the paper running path
Paper running path
of the front unit
Open the front cover check if paper is not
jammedinthepaperrunningpath.
Removethejammed
paper.
(3-1-2) Check condition of the mechanical parts
Hopping sensor
and IN sensor lever
check
Check the sensor lever shapes and
operations for any problem.
Replace the sensor
lever(s) with proper
one(s).
(3-1-3) Check condition of electrical parts
Check the detection
condition of the
sensor signal.
Confirm that the sensor signals are normally
detected by using the Maintenance Menu
SWITCH SCAN function.
Replace the CU/PU
board, or appropriate
sensor(s) or
connection cord(s)
Hopping sensor and
IN sensor output
level check
Check the following signals by using the
CU/PU board HPSNS
⑮
and RGSNS
connector
⑯
:
HPSNS pin 2: Hopping sensor
RGSNS pin 5: IN sensor
Check that the above signal levels are
changed by operating the levers of the
sensors.
Replace the CU/PU
board.
(3-2) Jam occurs immediately after the paper feed is started. (1st tray)
Check item Checking method Action in case of NG
(3-2-1) Check condition of the paper running path
Paper running path
of the front unit
Checkifpaperisjammedornotinthepaper
running path.
Removethejammed
paper.
(3-2-2) Check condition of the mechanical parts
Hopping sensor
and IN sensor lever
check
Check the sensor lever shapes and
operations for any problem.
Replace the sensor
lever(s) with proper
one(s).
Check the separator
assemblies of the
feed roller, the
pickup roller and the
tray.
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 or the pickup roller
has worn out or not.
Replace the separator
assemblies of the feed
roller, pickup roller
and tray.
(3-2-3) 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 paper
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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