Lexmark C734dn User Manual page 184

These are possible solutions. Try one or more of the following:
C
HECK THE PAPER GUIDES
Move the guides in the tray to the correct positions for the paper size loaded.
C
HECK THE PAPER SIZE SETTING
Make sure the paper size setting matches the paper loaded in the tray:
1
From the printer control panel Paper menu, check the Paper Size setting.
2
Before sending the job to print, specify the correct size setting:
For Windows users, specify the size from Print Properties.
•
For Macintosh users, specify the size from the Page Setup dialog.
•
Light colored line, white line, or incorrectly colored line
These are possible solutions. Try one or more of the following:
A
TONER CARTRIDGE IS DEFECTIVE
Replace the defective toner cartridge.
A
PHOTOCONDUCTOR IS DEFECTIVE
Replace the defective photoconductor.
T
HE TRANSFER MODULE IS DEFECTIVE
Replace the transfer module.
T
HE PRINTHEAD LENSES ARE DIRTY
Clean the printhead lenses.
Troubleshooting
184