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4.3.2 Troubleshooting image defect
Image defect related problems are end user recoverable if following the User Check items. If
the same problem occurs again, follow each procedure in the order of the number described in
the Step column in the tables below.
Light
Faulty registration
<User Check>
• Check the usage environment of the machine. Using the machine in
hot-humid or cold-dry conditions can cause this problem.
• If the whole page is light, toner save mode may be ON. Turn OFF the
toner save mode.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
• Turn ON the power switch, and leave the machine for a while
(condensation).
• Check if paper is not damp.
• Use specified paper.
Step
Cause
Remedy
1
Dirt on the electrodes of the
drum unit, toner cartridge and
those of the machine
Clean the electrodes of the drum unit, toner
cartridge and those of the machine. (Refer to
and
2
Dirt on the electrodes of the
high-voltage power supply
PCB and those of the
machine
Clean the electrodes of the high-voltage
power supply PCB and those of the machine.
3
Fuser unit failure
Replace the fuser unit.
4
High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
5
Main PCB failure
Replace the main PCB ASSY.
<User Check>
• Check whether appropriate paper type is selected on the
driver.
• Install the latest main firmware.
Step
Cause
Remedy
1
Registration rear actuator
coming off
Reattach the registration rear actuator.
2
Laser unit failure
Replace the laser unit.
3
Main PCB failure
Replace the main PCB ASSY.
