2WA/2NJ/2RK
7-588
(3) The MP tray paper size is misdetected.
(4) The controller fan motor does not rotate
(Final phenomenon: Malfunction such as the abnormal image output due to heated CPU)
Step Check description Assumed cause Measures Reference
1 Checking the wire The connector is not prop-
erly connected.
Clean the terminal of the fol-
lowing wire connectors and
reinsert the connectors.
Replace the wire when it has
no continuity. • MP paper
length detection sensor -
Relay PWB • Relay PWB -
Feed PWB • Feed PWB -
Engine PWB
Wiring dia-
gram
2 Checking the wire The connector is not prop-
erly connected.
Clean the terminal of the fol-
lowing wire connectors and
reinsert the connectors.
Replace the wire when it has
no continuity. • MP paper
width detection sensor -
Relay PWB • Relay PWB -
Feed PWB • Feed PWB -
Engine PWB
Wiring dia-
gram
3 Checking the MP paper
width sensor
The MP paper width detec-
tion sensor is not properly
attached, or it is faulty.
Check the home position of
the MP paper width sensor,
and reattach it if necessary.
Then, replace the sensor if it
is not fixed.
4 Replacing the MP paper
length switch
The MP paper length
switch is faulty.
Replace the MP paper length
switch.
5 Replacing the feed PWB The feed PWB is faulty. Replace the feed PWB.
6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Detaching
and Reat-
taching the
engine
PWB
Step Check description Assumed cause Measures Reference
1 Cleaning the controller fan
motor
The fan is dirty with dust. Clean the controller fan
motor.
2 Checking the wire The connector is not prop-
erly connected.
Clean the terminal of the fol-
lowing wire connectors and
reinsert the connectors.
Replace the wire when it has
no continuity. • Controller fan
motor - Main PWB
Wiring dia-
gram