Utax P-4532DN - (1-1) No image appears (entirely white)

7-4
Troubleshooting ＞ Image formation problems
[CONFIDENTIAL]
(1-1)No image appears (entirely white)
Print example Cause of trouble
1 No or defective developing bias output.
2 Failure of the rotation of the developing roller.
3 Defective transfer.
4 Laser is not dispersed from the laser scanner unit (LSU).
Defective part Check description Corrective Action
1
Developing unit Generate PGs by service mode and
check the following :
Check whether the developer drive
gear is damaged.
If the gear is damaged, replace the developer unit.
Check the developing roller is
rotated by hand.
If the developer unit is in fault, replace the devel-
oper unit.
Check contamination and deforma-
tion on the terminals of developer
unit or the high-voltage PWB1.
If the connecting terminals are dirty, clean.
If the connecting terminals are deformed, correct for
a proper conduction.
2
High voltage PWB Check the connection of the con-
nector(s) and the high voltage PWB.
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 (YC101) and control
PWB (YC19)
3
Laser scanner unit
(LSU)
Check the connection of the con-
nectors.
Or, verify conduction of the wires.
1. Reinsert the FFC wire if it its connection is
loose.
Replace the cable if it has no conduction.
2. Replace the LSU.
4
Control PWB A control signal is not derived from
the control PWB.
Replace the control PWB.