2WA/2NJ/2RK
7-589
(5) The developer fan motor does not rotate
(Final phenomenon: The printing operation of the main unit is frequently interrupted to cool the machine inside
according to the inner temperature increase during the continuous printing.)
(6) The main unit malfunctions even if turning on the power switch
3 Replacing the controller
fan motor
The motor is faulty. Replace the controller fan
motor.
Fan
Motors
Attach-
able Direc-
tion
4 Replacing the main PWB The main PWB is faulty. Replace the main PWB. Detaching
and Reat-
taching the
main PWB
Step Check description Assumed cause Measures Reference
1 Cleaning the developer fan
motor
Foreign materials such as
dust adhere on the devel-
oper fan motor.
Clean the developer fan
motor.
2 Checking the wire The connectors are not
properly connected or the
wire is faulty.
Clean the terminal of the fol-
lowing wire connectors and
reinsert the connectors.
Replace the wire when it has
no continuity. • Developer fan
motor - Front PWB • Front
PWB - Engine PWB
Wiring dia-
gram
3 Replacing the developer
fan motor
The developer fan motor is
faulty.
Replace the developer fan
motor.
Fan
Motors
Attach-
able Direc-
tion
4 Replacing the front PWB The front PWB is faulty. Replace the front PWB. Detaching
and Reat-
taching the
front PWB
5 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 Measuring the input volt-
age
The power cord has no
continuity.
Plug the power cord into
another wall outlet.
Step Check description Assumed cause Measures Reference