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Confidential
■ White spots on one color image
<User Check>
• Check that the fan is not clogged.
• 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.
<Pitches on images caused by rollers>
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 the
table below and determine the cause based on the pitch at which defects appear on the
image.
Part name
The pitch which
appears in the image
Develop roller of the toner cartridge 29 mm
Exposure drum of the drum unit 94.5 mm
Heat roller of the fuser unit 78.5 mm
Pressure roller of the fuser unit 78.5 mm
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