Samsung Mono Multifunction PrinterSL-M2875FD w/Fax and Duplex 用户手册

If the printer driver does not work properly, uninstall the driver and reinstall it.

 Open Terminal program.

Move to uld folder extracted from Unified Linux Driver package.

Execute "./uninstall.sh" command (If you're not logged in as root, 
execute the command with "sudo" as "sudo ./uninstall.sh")

Proceed with the uninstallation.