To erase volatile memory or buffered data in your printer, turn off the printer.
To erase non-volatile memory or individual settings, device and network settings, security settings, and embedded solutions, do the following:
From the home screen, touch Settings > Device > Maintenance > Out of Service Erase.
Select the Sanitize all information on nonvolatile memory check box, and then touch ERASE.
Follow the instructions on the display.