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 OK .
Select either Start initial setup or Leave printer offline , and then touch OK .