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What is the main problems of overhead projector ?

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How can I focus it other than using the focus knob


The focus knob is the way you focus overhead projectors. Perhaps you simply haven't turned the knob far enough? How far is the projector from the screen? If it's quite close, you need to turn the knob to raise the lens. If far away, turn it to lower the lens.

Nov 25, 2015 | 3M 9200 Overhead Projector

1 Answer

I have a older overhead projector that I need a bulb for but can't find the right bulb where can I find the bulb at......


You can provide the model # for the projector or possibly look at the actual old bulb to obtain any identification data from the bulb - such as a part #.

Here is a link for 3m replacement lamps:
3M Canada Office 3M Overhead Projector Lamps

Jan 06, 2015 | 3M Office Equipment & Supplies

2 Answers

Elmo overhead projector


Move the projector away from the wall, the picture gets bigger. Then use the focus knob at the top to get a clear picture on the wall. Then use a camera to take a picture of the wall. Then upload the picture to the place you want to transfer it to.

Dec 20, 2013 | Elmo Projectors Elmo HP-L3550S Overhead...

1 Answer

When I turn on the overhead projector it displays picture on the ceiling. Need to adjust to show on the wall. Do not have a manual.


Hi! This is a pretty common problem with overhead projectors. At the top of the arm that's over the unit, there should be a lens unit. The unit needs to be rotated so that one lens points down, and one lens points towards the screen. Once the lens is rotated properly, the lens unit is moved up or down in order to focus. There's usually a knob to turn to move the lens up or down.

Oct 28, 2013 | Apollo Horizon 2 OpenHead Overhead...

1 Answer

Assembling 3m 9100 projector


<a href="http://www.projectorsuperstore.com/">Projector SuperStore</a> is your one stop shop for all things presentaiton. Projector SuperStore is your number one resource for Presentation Equipment including Projectors and Projector Accessories from Panasonic, EPSON, Sanyo, Sony, Mitsubishi, InFocus, NEC and more. Visit: <a href="http://www.projectorsuperstore.com/">http://www.projectorsuperstore.com/</a>

Aug 29, 2012 | 3 m 3m 9100 Overhead Projector

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Bought new bulb for projector buhl 2900 but still not working.Fan comes one but no light


Like many overhead projectors, the Buhl 2900 can accept TWO projector bulbs (the operating one plus a spare). Make sure you inserted your replacement bulb in the slot for the operating lamp. There is a slide lever on the front of the unit that allows you to quickly switch to the spare lamp. Turn off the projector and move the slider to switch to the other bulb slot. See if that does the trick. Good luck!

Nov 22, 2010 | Buhl 90 Series Open Head Overhead...

1 Answer

How does overhead projector works??


Overhead projector consist a large box with a very bright lamp and a fan to cool it. On top of the box is a large fresnel lens that collimates the light. Above the box is a mirror and lens that focusses and redirects the light forward instead of up.

Aug 15, 2010 | Califone International Office Equipment &...

1 Answer

What is an Overhead Projector?


An overhead projector is a very basic but reliable form of projector. The overhead projector displays images onto a screen or wall. It consists of a large box containing cooling fan and an extremely bright light, with a long arm extended above it. At the end of the arm is a mirror that catches and redirects the light towards the screen.
An overhead projector can be used to enlarge images onto the screen or wall for audiences to view.

Aug 12, 2010 | Buhl Office Equipment & Supplies

1 Answer

My overhead projector...it does not light up....the fan goes on but no light.


projector goes on then goes out. orange light on solid and flashing blue.
have had optoma look at it they said it was bulb.

Oct 23, 2009 | 3M EVW Overhead Projector Replacement Lamp...

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