Oki MC561 - Paper Feed Jam (Error Code 391: 1 St Tray); Jam Occurs Immediately after the Paper Feed Is Started. (1 St Tray); Jam Occurs Immediately after the Power Is Turned On. (1 St Tray)

44473001TH Rev.1
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Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
7.5.4. (3) Paper feed jam (error code 391: 1st tray)
(3-1) Jam occurs immediately after the power is turned on. (1st tray)
Check item Check operation
Actions for NG
results
(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
jammed in the paper running path.
Re
move the
jammed 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 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 Check operation
Actions for NG
results
(3-2-1) Check condition of the paper running path
Paper running path
of the front unit
Check if paper is jammed or not in the paper
running path.
Remove the
jammed 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
PU board or
the paper feed
motor.
Paper feed motor
driver
Pull out the CU/PU board HOPSIZE 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.