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Black band
Step
FG harnesses or FG plate
attachment failure (not grounded
1
correctly)
2
Laser unit failure
< How to clean the drum unit (the shape of the drum is different from the actual one) >
(1) Remove the toner cartridge from the drum unit. Check where the image distortion occurs
by placing the print sample in front of the drum unit.
< Examples of image distortion >
White dots repeat in A mm distance on
the black page with printed images.
Refer to the table
value A.
<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>
exposure drum using a cotton applicator.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
Cause
Fig. 2-14
A mm
A mm
Fig. 2-15
<Pitch appears in the image and rollers >
2-104
to remove the dirt from the
Remedy
Retighten the screws to secure the FG
harnesses or FG plate.
Fix the bent tray ground spring of the paper
tray. (Refer to
Fig.
2-13.)
Replace the laser unit.
Black dots repeat in A mm distance
on the page.
for what represents the
A mm
A mm
Confidential
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Table of Contents
Troubleshooting
