Brother HL-730Plus Service Manual page 181

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 and pushed fully home into 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.
CHAPTER 5 MAINTENANCE
CHAPTER 5 –5