If the printer is not straight out of the box, and the configuration is not useful, a factory reset can be done by:
Holding down the 'GO' button and turning the printer on.
Keep holding it down until the top three printer lights come on (Toner/Drum/Error).
Release the 'GO' button
Press the 'GO' button six times in succession.
Then the printer should reset its settings and reboot (from page 31 of supplied manual).