First make 10 to 15 copies of a blank, white sheet of paper.
If you still see the spots on printed documents after making multiple copies, clean the drum unit as follows:
Remove the drum unit and toner cartridge assembly, and then remove the toner cartridge from the drum unit.
Position the print sample in front of the drum unit so you will know the exact position on the drum that is causing the poor print.
Turn the black gear on the drum as you check the surface of the OPC drum. The OPC drum is photosensitive so do not touch it with your fingers.
When you find the substance on the drum surface that matches the print sample, gently rub the surface of the OPC drum with a cotton swab.
- Do not use a scrubbing or wiping motion because this might damage the drum.
- Do not try to clean the surface of the OPC drum with a sharp object, such as a ball-point pen, because this might cause permanent damage to the drum unit.
If the print quality still has not improved you need to install a new drum.