Brother HL-2290 Service Manual page 96

 Band
<User Check>
Step
A ground wire or ground plate
installation failure (Grounding
1
is not performed correctly.)
Dirt on the exposure drum
2
3 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. Turn the drum unit as shown in the
illustration. Make sure that the drum unit gear is on the left side.
• 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>
exposure drum using a cotton applicator.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
Cause
Fig. 2-16
2-74
to remove the dirt from the
Remedy
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. 2-14 (P2-69).)
Perform drum cleaning.
(Refer to "2.2 Drum Cleaning" in Chapter
Replace the laser unit.
5.)
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