Brother HL-1800 series - Manual (Page 130)

5-10
☛ ☛ ☛ ☛ 8.
Put the Drum Unit back into the printer. Close the Front Cover.
Fig. 5-8
✒ ✒ ✒ ✒ Note
We recommend that you clean the printer when you replace the Toner
Cartridge.
See “Cleaning” in this chapter.