2-94
Confidential
Band
<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. Turn the drum unit as shown in the
illustration. Make sure that the drum unit gear is on the left side.
Fig. 2-20
<User Check>
• Clean the corona wire of the drum unit.
• Clean the corona wire by sliding the green tab of the drum unit to the
left end.
• This problem may disappear after printing multiple sheets of paper.
• 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.
Step Cause Remedy
1
A ground wire or ground plate
installation failure (Grounding
is not performed correctly.)
Retighten the screws of each ground wire or
ground plate. Repair the bend of the tray
ground spring of the paper tray.
(Refer to Fig. 2-18 (P2-89).)
2
Dirt on the exposure drum Perform drum cleaning.
(Refer to “2.1 Drum Cleaning” in Chapter 5.)
3 Laser unit failure Replace the laser unit.
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