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The OHPs pictured above and below use ENX bulbs and come equipped with two - one in use and one as a spare bulb. If the bulb burns out during your presentation in the above projector, turn it off and
move the slider control on the back to the opposite side. This
will move the second bulb into place. Be sure to move the slider completely over to the other side or the projector will not project well. If the bulb burns out in the projector pictured below, turn off the OHP and open the switch cover to the front left of the machine. Turn the bulb knob (the left knob) to the opposite side. Make sure you close the switch cover completely, as the OHP will not power up otherwise. Please make
sure to turn off the projectors when changing the lamps. OHPs not pictured here should operate similary to the two described.
 
In order to make the image bigger, move the projector away from the screen. To focus
the image, use the dial on the side of the arm. To raise or lower the image adjust the head up or down.
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