### Cleaning the corona wires

If you have print quality problems, clean the corona wires as follows:

1 | Turn off the printer power switch. Fully open the top cover by lifting up on the handle (1).
2 | Take out a drum unit and toner cartridge assembly. IMPORTANT
• | We recommend that you place the drum unit and toner cartridge assembly on a clean, flat surface with a sheet of disposable paper or cloth underneath it 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 illustration.
3 | Clean the primary corona wire inside the drum unit by gently sliding the green tab from left to right and right to left several times. Note
| Be sure to return the tab to the home position () (1). If you do not, printed pages may have a vertical stripe.
4 | Slide the drum unit and toner cartridge assembly into the printer. Make sure that you match the toner cartridge colour to the same colour label on the printer.
C - Cyan M - Magenta | Y - Yellow K - Black
5 | Repeat steps 2 to 4 to clean each of the remaining corona wires.
6 | Close the top cover of the printer.
7 | Turn the printer power switch back on.

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