overhead projector bulbs burning out quick whats the problem???


Old 10-08-05, 09:56 AM
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overhead projector bulbs burning out quick whats the problem???

Ok my sister is a school teacher and she has gone through 4 bulbs on the overhead projector in 5 weeks... she at her old school would maybe use 3 bulbs in the whole year.. problem with projector??? she thinks maybe since it is a portable room she teaches in and it kinda shakes when people walk around etc that might have something to do with it???? whats your guess at the problem?????
Old 10-08-05, 10:26 AM
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Could be for that reason. But also check these as well. Is there a cooling fan and is it running? When you change bulbs of this nature great care should be taked not to touch the glass part with your bare hands. The high heat generated from these bulbs and the oils from your skin will create a hot spot on the bulb which can and will greatly shorten the bulbs life.
Old 10-08-05, 05:34 PM
Join Date: Sep 2002
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The vibration could be the problem. Heat could be the problem. Tell her to make sure she turns it off with the switch on the projector and lets the fan run until it stops cooling the bulb.

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