Dell C1765NF MFP Laser Printer - Manual (Page 314)

312 Maintaining Your Printer
Installing a Toner Cartridge
1 Unpack a new toner cartridge of the desired color and shake it five to six times to distribute the toner evenly.
NOTE: Ensure that the color of the new toner cartridge matches that on the handle before replacing it.
NOTE: Handle the toner cartridge carefully to avoid spillage of the toner.
2 Remove the tape from the toner cartridge.
3 Adjust the toner cartridge to the associated cartridge holder, and then insert it firmly by pressing near the center of
the label until the cartridge clicks.