Canon imageRunner 400 Reference Manual page 169

4
Hold the new toner cartridge in your hand as shown
in the figure on your left, and rock it several times to
the left and right.
5
Place the toner cartridge on the toner box as
shown in the figure on the right and push it in as
far as possible.
6
Cartridge knob
Push the toner cartridge down from above
to lock it in place on the toner box. Make
sure that the black cartridge knob protrudes
towards you.
7
Pull out the black cartridge knob to-
wards you until STOP appears.
Adding Toner
5–9