Hi Suzie, hope this helps:-
Hold the ivory-color grip, and pull
out the developing assembly to
the front until it stops.
Shake the toner cartridge several
times.
Set the toner cartridge on the top side of the
developing assembly, and push it
down until the opening knob
comes off.
• The toner cartridge will be
locked to the developing
assembly, and the opening
knob of the toner cartridge will
come off.
While holding the toner cartridge,
pull out the opening knob to the
front until it stops.
Copier Guy, October 2008