Brother 4000CN User Manual page 149

2.
Grip the levers at the ends of the toner
cartridge that you want to replace and
pull them up.
3.
Pull out the toner cartridge.
✏ Note
Put the toner cartridge onto a piece
of paper to prevent the toner from
staining the floor or furniture.
To prevent residual toner form
spilling, avoid shaking or bumping
used toner cartridges.
4.
Select the new toner cartridge that is
being replaced, and remove it from it's
packaging.
5.
Shake the toner cartridge 7 or 8 times
as illustrated to distribute toner evenly.
8-3