50Before Setting Up Your ProjectorPosition of the key locks on the coversWhen removing or attaching a cover of the projector main unit, the lock needs to be unlocked using the included service key. Thepositions of the locks on each of the covers are as follows.WARNINGTO REDUCE THE RISK OF ELECTRIC SHOCK AND LASER RADIATION, DO NOT OPEN COVER. NO USER-SERVICEABLEPARTS INSIDE. REFER SERVICING AND INSTALLATION TO QUALIFIED SERVICE PERSONNEL AND INSTALLATIONPERSONNEL.NOTE When a cover is removed, the power to the unit is automatically turned off by the safety protection system.Lens CoverThe lock is unlocked when attaching or removing lenses (page 51, 94).Just canceling the lock will not allow you to remove the service key.Side PanelThe lock is unlocked when attaching or removing the option board (page 98).Just canceling the lock will not allow you to remove the service key.