2NM/2NX/2NY/2NZ/2P0/2P6
1-4-75
(2) No image appears (entirely black).
Print example Cause of trouble
1. No main charging.
2. The laser from the LSU is activated simultaneously.
Defective part Check description Corrective Action
1
Charging roller Check whether the charging
roller is properly mounted.
If the charging roller is not fixed properly, fix the
roller properly.
Check whether the connecting
terminals of the charging roller
and high-voltage PWB are
deformed.
If the connecting terminals are deformed,
correct for a proper conduction.
2
High voltage PWB Check the connection of the con-
nectors. Or, verify conduction of
the wires.
Reinsert the connector if its connection is
loose.
Replace the cable if it has no conduction.
High voltage PWB (YC101) and control PWB
(YC19) :Charger
Main charging current supplied
by the high voltage PWB is
faulty.
Replace the high voltage PWB.
(see page 2-2-20)
3
Laser scanner unit
(LSU)
Switching on and off the laser
diode on the LSU PWB is out of
control.
Replace the LSU. (see page 1-5-25)
4
Control PWB The control PWB is detective. Replace the control PWB.(see page 2-2-12)
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