H. Turn off at least the first row of lights, preferably all 3 front rows. The less light in front of the room, the better the picture on the screen. Disconnect it from the bench Input Plate. Return it to the rack drawer. Lock up the rack.
Rotate combination lock to display random numbers.
Equipment on the rack should be all ON as well. The cabinet in the back of the room contains 1 slide projector. It is, however, wired for two, so you can add another projector, if needed. Load your slides. B. Lower the screen.