10. Rotate the wheel at the end of the drum unit while pushing the shaded part, as shown in the illustration, to
find the mark or foreign material.
IMPORTANT
•
To avoid print quality problems, DO NOT touch the surface of the drum unit, only the wheel on the
end.
11. Wipe the surface of the drum gently with a dry cotton swab until the mark or foreign material on the surface
comes off.
NOTE
DO NOT clean the surface of the photosensitive drum with a sharp object or any liquids.
12. Install the toner cartridge and drum unit assembly back into the machine.
13. Close the front cover of the machine.
422