promethean activboard 300 pro series, Руководство пользователя

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Vibration
• Heat and vibrations are the enemy of any projector
bulb. If this projector has a filter, check to see if it is
plugged. Also, if you turn it to an energy/bulb
saving mode, it will be a bit dimmer, but should give
you a longer bulb life
• Is the image steady when it is projected, or does it
jump a bit? A few of our classrooms have a large air
handler above it on the roof, and you can see it in
the projected image, as a small vibration in the
image.
• Vibrations during operation shorten bulb life.