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Dirt on the paper
Step
1
Dirt on the paper feeding system
2
Dirt on the fuser unit
High-voltage power supply PCB
3
failure
Vertical streaks
Step
1
Dirt on the paper feeding system
FG harnesses or FG plate
attachment failure (not grounded
2
correctly)
3
Dirt on the fuser unit
4
Laser unit failure
<Bottom surface of paper tray>
Paper tray
<User Check>
• This problem may disappear after printing multiple
sheets of paper.
• Replace the drum unit with a new one.
Cause
<User Check>
• Clean the corona wire of the drum unit.
• Return the corona wire cleaning tab to the "▲" position.
• This problem may disappear after printing multiple
sheets of paper.
• Refer to
< How to clean the drum unit>
dirt from the exposure drum using a cotton applicator.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
Cause
Fig. 2-13
2-100
Remedy
Wipe off the dirt.
Replace the fuser unit.
Replace the high-voltage power supply
PCB ASSY.
Remedy
Wipe off the dirt.
Retighten the screws to secure the FG
harnesses or FG plate.
Fix the bent tray ground spring of the paper
tray (Refer to the figure below).
Replace the fuser unit.
Replace the laser unit.
to remove the
Tray ground spring
Confidential
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Table of Contents
Troubleshooting
