Dell 1350cnw User Manual page 269

NOTE:
handle before replacing it.
NOTE:
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.
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Ensure that the color of the new toner cartridge matches that on the
Handle the toner cartridge carefully to avoid spillage of the toner.
Maintaining Your Printer
265