Feed Jam (Error Code E202); Jam Occurs Immediately After The Power Is Turned On; Jam Occurs Immediately After The Paper Feed Is Started - Oki MC760 Maintenance Manual

7.5.4. (4) Feed jam (error code E202)

(4-1) Jam occurs immediately after the power is turned on.

Check item
(4-1-1) 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.
Check the paper Open the 1st Tray and check the paper guide
guide of 1st Tray position
(4-1-2) Check condition of the mechanical parts
Check the sensor Check if shape and movement of the sensor
levers of the paper levers have any abnormality or not.
entrance sensor 1,
that of the paper
entrance sensor 2
and that of the WR
sensor.
(4-1-3) 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.
Check the output Check for the following signals at the FSNS
signal levels of the connector
paper entrance
Pin-4: Paper entrance sensor 1
sensor 1, that of
Pin-3: Paper entrance sensor 2
the paper entrance
Pin-2: WR sensor
sensor 2 and that of
Confirm that the above signal levels change
the WR sensor.
when the sensor lever is operated.
Check the power Check the 5V power at the FSNS connector
voltages supplied to of the front sensor PCB.
the front sensor PCB
Pin-1: 5V power supply
Pin-5: 0VL
Action to be taken
Check work
Remove the
jammed paper.
Set the paper
guide to correct
position
Replace the
sensor with the
good sensor
lever.
Replace either
the PU board
or the front
sensor PCB
or connection
cable.
Replace the
of the PU board. front sensor
PCB
Replace the
connection
cable.

(4-2) Jam occurs immediately after the paper feed is started.

Check item
at NG
(4-2-1) Check condition of the paper running path
Paper running path
of the front unit
Check the paper
guide of 1st Tray
(4-2-2) Check condition of the mechanical parts
Check the sensor
levers of the paper
entrance sensor 1,
that of the paper
entrance sensor 2
and that of the WR
sensor.
(4-2-3) Motor operation check
Paper feed motor
Paper feed motor
driver
7. Troubleshooting and repair procedure
Check work
Check if paper is jammed or not in the paper
running path.
Open the 1st Tray and check the paper guide
position
Check if shape and movement of the sensor
levers have any abnormality or not.
Confirm that the paper feed motor works
normally by using the Motor & Clutch Test of the
self-diagnostic mode.
Remove the HP_PSZCL connector of the PU
board and check the followings at the connector
side.
Several MΩ between pin-1 – FG
Several MΩ between pin-2 – FG
Several MΩ between pin-3 – FG
Several MΩ between pin-4 – FG
Action to be taken
at NG
Remove the
jammed paper.
Set the paper
guide to correct
position
Replace the
sensor with the
good sensor
lever.
Replace the PU
board, or replace
the paper feed
motor.
Replace the PU
board.
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