To erase volatile memory or buffered data in your printer, turn off the printer.
To erase nonvolatile 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.
Select Start initial setup wizard or Leave printer offline, and then touch Next.
Start the operation.