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Overhead
Projector Relamping Guide
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Elmo HP-L models
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Elmo HP-L series of overhead projectors. All of the projectors
covered by this procedure use the ENX type reflector lamp. |
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Relamping Procedure
CAUTION:Before opening the housing and replacing a burned-out
lamp, be sure the lamp has cooled thoroughly. Unplug the power cord
if possible before changing the lamp.
Opening the projector
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The lamp is located under the hinged panel
at the front of the projector. Loosen the two screws on the
top of this panel as shown. Use a screwdriver if you have
one...if you don't have a screwdriver, you can also use a
convenient coin (in the photo, that is a U. S. nickel). The
screws are supposed to be attached to the cover with a pair
of spring-metal keepers so that they don't fall on the floor
when you open the cover. Be careful, though...on many projectors
those keepers are missing, so when you open the cover, the
screws might fall on the floor. Don't lose them!
Using the ridge on the cover as a finger-hold,
pull the cover panel towards you. It will hinge open, revealing
the lamp.
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Removing the burned-out lamp
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The lamp socket is equipped with a lamp ejector.
Pull the lever toward you to lift the lamp out of the socket.
It will take some effort, and may not fully release the lamp
from the socket and lamp holder. If this happens, push the
ejector lever forward, then lift the lamp straight up out
of the lamp holder.
Once the lamp is out, push the lamp eject
lever forward.
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Installing the new lamp
Important: For optimum lamp life and performance, do
not touch the quartz (glass) bulb at the center of the lamp. The
oils in your skin will attack the quartz and cause the lamp to fail
prematurely.
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When you remove the lamp from the box, handle
it only by the outside of the reflector. Turn it so that the
pins are side by side and oriented vertically. Insert the
lamp into the lamp holder so that the back edge of the reflector
is held by the spring clips. Insure that the pins are carefully
lined up with the slots in the top of the ceramic socket,
and gently push down on the lamp until it is fully seated
in the socket and in the lamp holder. You may need to gently
push on the back of the socket to insure that the lamp pins
are properly seated. There should be no gap between the glass
base of the lamp and the ceramic socket.
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Closing the projector
Close the projector by lifting up on the hinged cover panel, and
reinstall the two cover screws. Make sure the projector is plugged
into an electrical outlet, and test it by turning it on. It should
light up. If it fails, double check to make sure that the
lamp is properly seated in the socket. Try removing the lamp and
turning it over...sometimes the manufacturing tolerances on the
lamps are not quite precise enough for the sockets. Once you get
it working, your work here is finished!
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