ProjectionIntroductionGeneralmaintenanceDevicesThe most common types of still picture projectors are the opaque, theoverhead, and the 35mm slide projector. You need a working knowledge ofthe operation and the basic maintenance of the common types of projectors.For general maintenance purposes, inspect the projection device well beforepresentation day to allow time for the repair of any discrepancies. Likewise,pay attention to the following details:Check the cleanliness of the lenses and projection stages:clean optical surfaces with a lint-free cloth, a damp chamois, or a lenstissue;clean exterior surfaces with a clean, damp cloth; andclean mirrored or reflective condensers with a camel hair brush.Check the device for worn or frayed electrical cords.Test device operation by running the projector for 5 minutes before actualuse to make sure it is working properly.Check the projector to screen distance.Keep a spare bulb available next to the projector.Continued on next page5-3
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