Brother MFC-9180 Owner's Manual page 143

For best performance, use only genuine Brother toner, and the product should be used only in a clean,
dust-free environment with adequate ventilation.
After you have just used the machine, some internal parts of the machine
will be extremely HOT! So please be careful.
Follow these steps to replace the drum unit:
1
Open the top cover.
2
Remove the old drum unit. Place the drum unit on an old cloth or large piece of disposable paper
to avoid spilling and scattering the toner.
3
Remove the toner cartridge from the drum unit and keep it in a safe place. (See Replacing the
Toner Cartridge, page 131.)
Top Cover
Drum Unit
Drum
Unit
Toner
Cartridge
Troubleshooting and Maintenance
135