If you are experiencing print quality problems, please clean the corona wire as follows:

1. Press the Cover release button, and then open the Front cover.

    

   

2. Pull out the Drum unit assembly.

    

   

    

   • We recommend that you place the Drum unit assembly on a piece of disposable paper or cloth in case you accidentally spill or scatter toner.
   • To prevent damage to the printer from static electricity, do not touch the electrodes shown below.

    

    
   

3. Clean the primary corona wire inside the Drum unit by gently sliding the blue tab from right to left several times. Return the tab to the Home position before re-installing the Drum unit assembly.

    

   

   Be sure to position the tab to the Home position, or printed pages may have vertical stripes.

    

4.  Re-install the Drum unit assembly into the printer.

    

   

5. Close the Front cover.