Canon i-SENSYS MF3010 User Manual page 192

5
Open the toner cover.
6
Remove the toner cartridge.
7
Remove toner powder, as well as paper dust and other debris from the inside of the machine, using a
clean, soft, dry, and lint-free cloth.
8
Insert the toner cartridge.
Fit the protrusions (A) on both sides of the toner cartridge into the guides located on both sides of the machine and slide
the toner cartridge into the machine until the toner cartridge comes to rest and is held against the back of the machine.