Kyocera TASKalfa 3051ci, Service Manual

Page: 260 / 317

2L6/2N6/2N5/2N4
1-4-259
(2) No image appears (entirely black).
Print example Cause of trouble
1. No main charging.
2. The laser from the LSU is activated simultaneously for all colors.
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 PWB1 are
deformed. If the connecting terminals are deformed,
correct for a proper conduction.
2
High-voltage
PWB1 Check the connection of the con-
nectors. Or, verify conduction of
the wires. Reinsert the connector if it its connection is
loose.
Replace the cable if it has no conduction.
High voltage PWB 1 (YC1, 2) and engine PWB
(YC16)
High voltage PWB 1 (YC3, 4) and engine PWB
(YC17)
Main charging current supplied
by the high-voltage PWB1 is
faulty. Replace the high-voltage PWB1.
(see page 1-5-88)
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 1-5-43)
4
Engine PWB The engine PWB is detective. Replace the engine PWB.(see page 1-5-80)
5
Main PWB The main PWB is defective. Replace the main PWB.(see page 1-5-80)