Dell 2350d/dn Mono Laser Printer - Manual (Page 144)

Use only transparencies recommended by Dell.
Ensure that the Paper Type setting is Transparency.
Toner specks appear on the page.
The toner cartridge is defective.
The fuser 2 is worn or defective.
Toner is in the paper path.
Try the following:
Replace the toner cartridge.
Replace the fuser 2 .
Call for service.
Toner rubs off the paper easily when you handle the sheets.
The Paper Texture setting is wrong for the type of paper or specialty media you are using.
The Paper Weight setting is wrong for the type of paper or specialty media you are using.
The fuser 2 is worn or defective.
Try the following:
Ensure that the Paper Texture setting matches the paper loaded in the tray.