If black lines or colored lines appear even after you have cleaned the document glass and automatic document feeder, use the charger cleaner to clean the main charger that charges the photoconductive drum.
  • If cleaning the main charger of the photoconductive drum does not solve the problem, pull the knob out and push it back three more times.
  • When pulling and pushing the knob to clean the charger, pull and push the knob slowly from one end to the other.