Saint Paul Public Schools
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Things You Can Use

Printer parts source: www.partsnow.com
You will need to set up your own account. My contact is Sara
800 886-6688 Ext 1292

Overhead projector parts: www.mbelectronics.com
You will need to set up an account.

Lamps: If you touch the glass on a projector lamp,  you will get oil on it from
your fingers. These lamps burn so hot, your fingerprints will burn into the lamp
and the lamp will quickly burn out. If you inadvertently touch one, just wipe it off
good with a dry cloth and you will be OK.

EHA: Can't find EHA lamps! Use a DYS instead. It will not be as bright but will
work fine in most cases.

Burning out lamps:   Following are some things you can look for if you
burn out lamps really fast. Do you let the machine cool before you move it. Are
you blocking the free airflow through the machine with books or papers. Do you let
the machine run when you are not using it. One thing I see a lot of is lamp
sockets that are burnt. This is very common with ENX type lamps. It happens
when the lamp is not fully seated in the socket. Make sure you push the lamp all
the way into the socket.

Batteries: Have you ever noticed  rechargeable batteries wear out quickly. It
may have developed a bad memory! This happens when you do not discharge
them all the way before charging them. The short discharge/recharge cycle will
imprint on the battery. Some times you can bring them back by cycling them.
Discharge it to about 10% dead, then charge it up immediately. Do this maybe
10 times in succession and see if it helps.
There is a new generation of rechargeable batteries that are not subject to this
phenomenon. InfoLithium, Nickel Metal Hydride (Ni-Mh), and Lead Acid type do not develop memory problems. It is never a good idea to store a Nickel Cadmium (NiCd) in a dead condition.

Video Projector: Video Projectors are very popular these days. By doing a
simple cleaning of the filter on the main fan you can extend the useful life of your
$400 plus lamp. Every video projector uses a foam type dust filter that filters the
incoming air to the lamp. They are made to be removed by the user and can be
cleaned by blowing or vacuuming them. Check with your user manual for
recommendations for your machine.

Head End VCR: Why can't I control my VCR thru the telephone? This is  very
common, and may have a very easy solution. On the front of the VCR is
attached a small button or block. This is the infrared (remote) link to the VCR
from the media controller. They are held on by double back tape and they like to
fall off. The most reliable way to solve this is with a good piece of tape. Tape
over the button in such a way that you do not interfere with inserting video tapes
or control buttons and you may solve your problem!

HDTV or DTV,  For current news on the progress of HDTV or DTV visit  the FCC home page.What does HDTV mean for us as a school district? All of our systems are currently NTSC (analog). All standard VHS videotapes and DVD you have will continue to play through our systems. 

Digital cameras and digital camcorders in most cases can not be repaired by AV repair, or any local service center for that matter. They need to be sent back to the manufacturer for service. Usually you will pay a flat fee plus shipping. You can almost always find the info you need for service on the company web site. Do not ship any item without first contacting the company and getting an RMA number. Your school or site will be responsible for any charges incurred.

 


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 MB Electronics   Overhead projector parts and on-line service manuals
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