2-61
Confidential
Ghost
Fogging
<User Check>
• Check the usage environment of the machine. Using the machine in
hot-humid or cold-dry conditions can cause this problem.
• Check whether appropriate paper type is selected on the driver.
• Select “Improve Toner Fixing” in the driver.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
Step Cause Remedy
1
Scratch or dirt on the fuser
unit, or conductive leaf spring
deformation
Replace the fuser unit.
2
High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
<User Check>
• Check the usage environment of the machine. Using the machine in
hot-humid or cold-dry conditions can cause this problem.
• Check if the acid paper is not used.
• This problem may disappear after printing multiple sheets of paper.
• Replace the toner cartridge with a new one.
• Replace the drum unit with a new one.
Step Cause Remedy
1
Dirt on the electrodes Clean the electrodes of the drum unit and
those of the machine. (Refer to Fig. 2-7 (P2-
31) and Fig. 2-6 (P2-31).)
2 New toner sensor PCB failure Replace the new toner sensor PCB ASSY.
3
High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB
ASSY.
4 Main PCB failure Replace the main PCB ASSY.
Note:
This problem tends to occur when the life of the drum unit or toner cartridge is expiring.
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