Canon LBP7660Cdn Manual page 69

Do not pull the sealing tape diagonally, upward, or downward. If the tape is severed, this may become difficult to
pull out completely.
If the sealing tape stops at midpoint, pull it out of the toner cartridge completely. If any tape remains in the toner
cartridge, this may result in low print quality.
Dispose of the removed sealing tape according to local regulations.
8
Remove the drum protective cover (A).
9
Install the toner cartridge.
Be careful not to let the drum impact the frame of the toner cartridge tray.
10
Push the toner cartridge tray back in.
11
Close the front cover.
If you cannot close the front cover
Make sure that the toner cartridge tray is closed.
Do not try to forcefully close the front cover, as this may damage the machine.