Dell 1355 Color Laser User Manual page 445

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.
Maintaining Your Printer
443