Dell C1765NF MFP Laser Printer - Manual (Page 344)

342 Troubleshooting
Toner smears or print comes off/Stain on back side
Action Yes No
1 The print media surface may be uneven. Try changing the Paper Type
setting in the printer driver. For example, change the plain paper to
thick.
a On the Paper/Output tab in Printing Preferences of the printer
driver, change the Paper Type setting.
Is the problem recovered?
The task is complete. Go to action 2.
2 Verify that the correct print media is being used. See "Supported Paper
Types" on page 209. If not, use the print media recommended for the
printer.
Is the problem recovered?
The task is complete. Go to action 3.
3 Adjust the fusing unit temperature.
a Launch the Tool Box, and click Adjust Fusing Unit on the Printer
Maintenance tab.
b Adjust the fixing temperature by turning up the value for your
printing media.
c Click Apply New Settings.
d Click close box to exit Tool Box.
Is the problem recovered?
The task is complete. Contact Dell.