How to reset Xerox Phaser 3100 to factory settings?

First you have to enable the admin mode:
press and release: (down arrow) * #
on SOS1 change the 8th bit to 1 (counting right to left)
ie: 00100001 to 10100001 {press OK to confirm}
Now the admin menus are enabled.
To <Erase all. Reset to default configuration>
press (and release): (down arrow) #7