If you are experiencing print quality problems, please clean the corona wire as follows:
| 1 | Open the front cover of the printer. |
| 2 | Pull out the drum unit and toner cartridge assembly.   CAUTION | | We recommend that you place the drum unit and toner cartridge 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 in the illustrations. |
|
| 3 | Clean the primary corona wire inside the drum unit by gently sliding the blue tab from right to left and left to right several times. Return the tab to the home position (  ) (1) before you put the drum unit back in the printer. If you do not, printed pages may have a vertical stripe. |
| 4 | Put the drum unit and toner cartridge assembly back in the printer. Close the front cover of the printer. |
