Brother HL-1070 Service Manual page 201

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.
5–5
CHAPTER 5 MAINTENANCE