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

Oki Data CONFIDENTIAL

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
(3-1-1) Check condition of the paper running path
Paper running path Open the front cover check if paper is not
of the front unit jammed in the paper running path.
(3-1-2) Check condition of the mechanical parts
Hopping sensor Check the sensor lever shapes and operations
and IN sensor lever for any problem.
check
(3-1-3) Check condition of electrical parts
Check the detection Confirm that the sensor signals are normally
condition of the detected by using the Maintenance Menu
sensor signal. SWITCH SCAN function.
Hopping sensor and Check the following signals by using the CU/PU
IN sensor output board HPSNS and RGSNS connector 16:
level check 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.
44473001TH Rev.1
Check operation Actions for NG
results
Remove the
jammed paper.
Replace the
sensor lever(s)
with proper
one(s).
Replace the
CU/PU board,
or appropriate
sensor(s) or
connection
cord(s)
Replace the
CU/PU board.

(3-2) Jam occurs immediately after the paper feed is started. (1st tray)

Check item
(3-2-1) 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.
(3-2-2) Check condition of the mechanical parts
Hopping sensor Check the sensor lever shapes and operations
and IN sensor lever for any problem.
check
Check the separator Check if any foreign materials such as paper dust
assemblies of the on the surface of the feed roller or of the pickup
feed roller, the roller or not.
pickup roller and
Check if the feed roller or the pickup roller has
the tray.
worn out or not.
(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.
Paper feed motor Pull out the CU/PU board HOPSIZE connector
driver 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.
7. TROUBLESHOOTING PROCEDURES
Check operation Actions for NG
results
Remove the
jammed paper.
Replace the
sensor lever(s)
with proper
one(s).
Remove the
foreign material.
Replace the
separator
assemblies of
the feed roller,
pickup roller and
tray.
Replace the
PU board or
the paper feed
motor.
Replace the CU/
PU board.
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