Filmstrip Projector

button on the remote control to put the first slide into viewing position. Center and Focus.—Center and focus the projected image on the screen. Do so by turning the elevation wheel to elevate the projector to the desired position. Level the projector, if necessary, to align the image on the screen. Obtain a sharp focus by rotating the focus knob back and forth to focus the picture on the screen. You may also focus the picture on the screen by using the focus level on the remote control. Automatic Timer.—Set the timer for the type of presentation. For example, if the projec- tor is part of a display, the automatic timer can be used to advance the slides; but the manual setting is better if a speaker is present or if an AV assistant is available to help in the briefing. Long-run Applications.—Allow for unrestricted flow of air to the projector open- ings. If the projector is used in a window display or in a cabinet, be sure to provide an adequate outlet for the warm air expelled from the rear grill vent. In some applications, additional ven- tilation may be needed. The air circulating through the projector should be as dust-free as possible. Ample cooling results if cool air is available to the projector. Normal room temper- atures are adequate. Emergency Slide Tray Removal.—If the slide-changing mechanism should become inop- erative because of a defective slide or some foreign object, switch the automatic timer to M (manual). Turn the slotted tray removal screw in either direction, as far as it will go, to retract the tray lock. While holding the screw in this posi- tion, lift off the slide tray. Because the slide tray has been removed in this manner, the lock on the bottom of the tray is no longer engaged by the notch in the metal slide retainer. With the tray placed upside down, turn the retainer until the lock engages the notch in the retainer; then remove the defective slide from the projector by pushing the SELECT button. Replace the tray on the projector. 287.27(M1) Figure 7-14.—Filmstrip projector. Filmstrip Projector The filmstrip projector shown in figure 7-14 is the Bell and Howell Autoload, Model 745A. The function and operation of this projector is similar to that of the many different types of filmstrip projectors currently in use in audio- visual facilities. The model 745A filmstrip projector accepts standard 35-mm filmstrips and adapts to 2- x 2-inch (50- x 50-mm) slides. Here we are concerned with its function as a filmstrip projec- tor. Figure 7-14 illustrates the important parts of this projector. SETTING UP THE PROJECTOR.—Place the projector on a firm stand or table. Slide the front lens door open. Attach the power cable to a proper outlet and be sure the ground cable is attached to the outlet. LOADING THE CARTRIDGE AND PRO- JECTOR.—Grasp the filmstrip by the end and tighten the film into about a 1-inch (2.54-cm) diameter roll. Open the door of the cartridge, and position the film so that the leading edge feeds through the top opening of the cartridge. To load the projector, open the lens door by pressing the release button on the front of the projector. Pull open the access door. Pull the hinged cartridge lock down and away from the 7-24