Follow these steps to replace the drum unit:

1Open the top cover.

2 Remove the old drum unit. Place the drum unit on a drop cloth or large piece of disposable paper to avoid spilling and scattering the toner.

Top Cover

3Remove the toner cartridge from the drum unit and keep it in a safe place. For more information, see

Replacing the Toner

Cartridge, page 15-26.

Drum Unit

Toner

Cartridge

Toner

Cartridge

Note Discard the used drum unit according to local regulations. If you are not sure of

them, call your local Sanitation Department. Be sure to seal the drum unit tightly so toner powder does not spill out of the unit. When discarding used drum units, keep them separate from domestic garbarage.

T R O U B L E S H O O T I N G A N D R O U T I N E M A I N T E N A N C E 15 - 31

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Brother MFC 4300 owner manual Cartridge