Dell 2350d/dn Mono Laser Printer - Manual (Page 143)

Try the following:
If the paper is stiff, try feeding from another tray or the multipurpose feeder.
Replace the toner cartridge.
The page contains print irregularities.
Paper has absorbed moisture due to high humidity.
You are using paper that does not meet the printer specifications.
The fuser 2 is worn or defective.
Try the following:
Load paper from a fresh package into the paper tray.
Avoid textured paper with rough finishes.
Ensure that the Paper Type setting matches the paper loaded in the tray.
Replace the fuser 2 .
The transparency print quality is poor. (Print has inappropriate light or dark spots, toner
is smeared, or horizontal or vertical light bands appear.)
You are using transparencies that do not meet the printer specifications.
The Paper Type setting is set to something other than Transparency.
Try the following: