As usual you all came through. My particular problem is a blown fuse so at least I
know what to ask for when I call it in.
Here are the other responses I received since I had a request for a hit.
Cheers to a great year!
Thank you!
Christe
If it is an older Elmo, check to see that the metal light cover is pulled back over
the light and not the mirror. I just had to do this for one of my teachers.
I have some that if not closed tightly won't light up. It is a safety measure, so
double check the lid closure.
When this has happened to me, I have had to call a repair person because the switch
has gone out on it (not the bulb).
It might help if you post the manufacturer's name - each OHP seems to have its own
quirks and someone might be able to diagnose better with that info. Also, do you
have a maintenance person assigned to your building, or a maintenance department?
What about other librarians in your district?
Many of the overheads have a thermal fuse that goes bad with time. There is no way
to get the bulb to work, since the fuse opens the circuit. The AV techs will have
to work on it.
If you've double checked and the bulb is snapped all the way in, then your next
thing to do is check to see if there is anything left in the receptacle from the
last bulb. Sometimes their little prongs break off and stay in there. Make sure
you unplug it to check.
While looking there look closely to see if the ceramic has cracked.
Looks like a prong in there? UNPLUG. Take a pair of tweezers or something else
that is long and pokey that you can see if you can get it out. Should work now.
Is it one of the double bulb cradles, make sure it is all the way over to the bulb
side. Sometimes it won't go all the way over.
Oh, a cracked ceramic means buying a new machine. Too expensive to replace
compared to the cost of a new overhead.
Long-distance diagnosis is always a guessing game, but here are some
things to try.
1. If there is a safety switch, make sure that it is actually closing.
Some machines wire the safety switch only to the bulb. Most have it
right after the fuse, before the fan and the bulb.
2. If you have a VOM, check the bulbs you are using. I've had a brand
new bulb that was dead. If the bulbs check out, check the wiring on the
bulb circuit.
3. If this is one of those machines that uses an 80-something volt bulb,
like an ENX, and it blows the bulbs as soon as it is turned on, switch
to a 120 volt bulb with the same base. If that works, change the label
on the machine to indicate that it needs a different bulb.
I have one style of overhead that has an option of putting two bulbs inside.
There's a lever on the outside to switch between the two and if it's not pulled all
the way to one or the other and locked the light won't come on. Also, check to
make sure the cover is back on completely and locked.
With the projector unplugged, check the contacts where the bulb goes in. If
necessary, clean them with dry steel wool. If that doesn't work, there's probably
an electrical problem - perhaps a detached wire or a short circuit.
The socket might be burned out or, if it's one of those 3M units that holds two
bulbs, the bulb and socket might not be locked in place (just look like it's in
place). These are the two reasons I look twice.
Call your AV supplier. Do they repair, if not who do they recommend. If you can't
find one in your are call Visual techniques Longview 1-800-777-1798. and ask if
they have a suggestion. Since I don't think he goes that way. I recommend them
hands down. I have used them almost 30 years off and on. I would not use anyone
else. (this is a fellow Texan)
ø¤º°`°º¤ø,,,,ø¤º°`°º¤ø,,,ø
Christe Hancock, Library Media Specialist
Speegleville Elementary,
101 Maywood, Waco, TX 76712
254-761-5730 Fax 254-848-9751
christe.hancock@midwayisd.org
"In <mailto:christe.hancock@midwayisd.org> the nonstop tsunami of global
information, librarians provide us with floaties and teach us how to swim."
Linton Weeks (Washington Post article, 13 January 2001, p. C01)
ø¤º°`°º¤ø,,,,ø¤º°`°º¤ø,,,ø
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