Lexmark MX317
Load an original document faceup, short edge first into the ADF tray or facedown on the scanner glass.
Notes:
If you are loading a document into the ADF tray, then adjust the paper guides.
From the printer control panel, navigate to:
Fax > > enter the fax number > > Darkness > adjust the darkness of the fax >
Here are troubleshooting steps when unable to 'Send' a fax with Laser Multifunction Printers (MFPs).
Unable to 'Receive' a Fax with Laser Multifunction Printers (MFPs)