Brother HL-1060 Series - Manual (Page 51)

CHAPTER 5 MAINTENANCE
CHAPTER 5 –5
6. Install the new toner cartridge into the right hand side of the drum unit.
Make sure that the toner cartridge guide bar is exactly aligned with the
guide slot in the drum unit to ensure that the toner cartridge and the
drum unit fit together correctly.
Fig. 5-7 Installing the Toner Cartridge
into the Drum Unit
7. Gently turn the lever on the toner cartridge backward until it stops.
Fig. 5-8 Turning the Lever to Open the Shutter
8. Re-install the drum unit into the printer and close the top cover. Then,
turn on the power switch.