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Confidential
■ One color spots or dirt
<User Check>
• Check if damp paper is used.
• Refer to <How to clean the drum unit> to remove the 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.
• Replace the belt unit with a new one.
Step Cause Remedy
1
Dirt on the paper dust
cleaning roller of the T1
Refer to the Fig. 2-8 (P2-83) to clean the
paper dust cleaning roller.
2 Clogged filter Clean the filter.
3
Scratch or dirt on the fuser
unit
Replace the fuser unit.
4
High-voltage power supply
PCB failure
Replace the high-voltage power supply PCB.
Note:
Image defects which appear periodically may be caused by failure of rollers. Refer to
<Pitches on images caused by rollers> and determine the cause based on the pitch at
which defects appear on the image.
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