CMC Equipment Operating Tips

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Audiovisual Equipment Operating Tips

Overhead Projector
Many classroom projectors have a built-in spare lamp feature. Sliding the slide-bar, located at the top-front panel of the projector, to the opposite side (from the failed lamp position) will activate a new lamp. Some of the beige models have a slide lever located on the rear panel that will activate a spare lamp. Please notify CMC if you experience any difficulties.

Slide Projector
All slide projectors are auto-focus types, with some models having a control panel switch to activate/deactivate this feature. For most uses it is recommended that this feature be on. Initial focusing of the first couple slides should be adequate for clear viewing of the remaining slides. Slides with warped, creased, or frayed mounts will likely result in focusing or jamming problems.

To properly insert a slide in the carousel, hold the slide near a light source orienting it to allow normal viewing. Then rotate the slide 180 degrees (upside-down) and insert into the carrousel's slot. The carrousel's retaining ring must be threaded on to eliminate jamming or forced ejection of slides.

16mm Film Projector
To correct a film that jitters and jumps simply turn the function knob to the 12 o'clock position shutting down operation. Rotate the knob to the FWD position to continue the film. This resets the film's loop. If problems persist, notify CMC.

Projection Screens
Many classrooms contain multiple screens of varying size and all screens operate in the same manner. Screens should be pulled down no further than the size of the projected image. An overextended screen may bind and not retract. To remedy this situation, a quick but gentle tug (gripping the pull bar at its bottom) should release the mechanism and allow it to retract.

Data Projector
Data projectors contain a special high-intensity lamp that requires a short warm-up period (approx. 30 sec). If the operator turns the projector on and off too quickly during the warm-up period the unit will enter into a safety mode and the image will not be projected for several minutes.

The projector should be turned off only with the hand-held remote or by pressing the power button located on the projector's top panel. Some data projector models (Sharp & Toshiba) will prompt the user via a small pop-up window at the bottom of the screen, to power down by pressing the OFF button on the remote control twice. Failing to press the OFF button twice will result in the projector turning itself back on after a short delay and substantially lower the lamp's life.

Computer Desks/Podiums
Access to computer desks and podiums requires a key. A CMC staff member will unlock the cabinet for the occasional-use request; however, for those who need ongoing access, a key may be signed out at the CMC office for the semester. This key will access all Technology Classroom podiums, including both lecture hall cabinets. All computers have access to the campus network and its established programs, including the Internet. Software problems and special programming concerns should be directed to CMC by calling x6121. We will attempt to correct problems along with the aid of the Computer Center.