Question about Dell 2300MP Multimedia Projector

5 Answers

Can't get to Dell 2300MP projector's dusty lens and/or mirror

When I display a dark image, dust specks show up as dim white blobs in the picture. When I set the zoom and focus to their extremes, the dust particles come into sharp focus. All I need to do is remove the cover to clean off what I suspect is a dusty mirror inside the projector. I've tried to take off the cover, but it doesn't move easily even with all the screws seemingly holding it on removed. I don't want to break the cover, so I need step-by-step instructions on how to get the cover off safely, assuming doing that will expose the dirty mirror and/or lenses. I'd also like to know what the best way is to clean the mirror. My can of compressed air warns users to "NEVER" spray it on a camera mirror, but that it's OK for use on camera lenses. I've searched, but the Internet yeilds no results for service manuals for the Dell 2300MP.

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  • 2 more comments 
  • Travis18 Dec 27, 2008

    There is a "Kensington lock hole" in the back of the projector. Is there something about this feature that is holding the top on, even though all the screws seemingly holding the top on are removed?

  • Travis18 Dec 31, 2008

    Update: I was finally able to get the top off the projector, but I still have a dusty mirror and/or lens. It turns out that one has to remove every screw on the exterior -- top, bottom and sides. After getting the cover off, I was confronted with a lot of delicate-looking electronics surrounding the lens assembly. I wasn't going to touch this without further guidance. Although I sprayed around the lens assembly with my compressed air, hoping that somehow I could dislodge the dust, I was unsuccessful. After reassembly, there was no change in the projected picture. So now my request is subtly changed to this: How do I get to the enclosed lens and mirror areas, step by step, without damaging anything? Perhaps there's a way to unscrew the lenses from the body of the projector.

  • Travis18 Jan 03, 2009

    emissionwiz said:

    "U say dust spots, then blobs what do u mean exactly on how they look, have you cleaned the lens?"

    When I'm projecting a movie (11 feet away from the screen), I focus and zoom to make the movie's picture sharp and fill the screen. When there's a darkly lit scene in the movie, you see dim white blobs. The blobs become sharply defined dust particles when you adjust the zoom and focus. You can make the dust particles come into focus by making the movie's picture go out of focus and adjusting the zoom so that the picure is as small as possible. What you see then is a very blurred picture of the projected movie with sharply in-focus dust specks superimposed on top of the blurred movie picture. The very first thing I tried was to clean the exterior of the lens. This made no difference.

  • Travis18 Apr 12, 2009

    I've bought a new projector, and will sell this one for parts.

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5 Answers

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Clean the mirror with a large, soft artist's brush. You can clean the lenses with any camera lens cleaning stuff as long as you don't use any paper products. Paper towels, napkins & tissues of all kinds will scratch the coatings. I use long cotton swabs. You will also find a small, dark grid like piece aimed directly at the mirror. It is like a tiny picture tube. Carefully clean the dirt film off this. Many digital cameras also fail when things get filmed up over the years.
When cleaning ANY type of lenses or mirrors, in or on anything, always use only cotton or silk to wipe them. Anything else will cause damage.

Posted on Jan 03, 2009

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Use the following safety guidelines to help protect your projector from potential damage and to ensure your own personal safety:

  • To reduce the risk of fire from the intense light emitted by the lens, do not put any object in front of or near the lens during operation.
  • Can't get to Dell 2300MP projector's dusty lens an - hg_caution.gif Lamp(s) inside this product contain mercury and must be recycled or disposed of according to local, state or Federal Laws. Or contact the electronic industries alliance: www.eiae.org for more information.
  • The surface beneath the projector might be hot with use. Be careful in handling the unit.
  • The lamp becomes very hot with use. Do not attempt to replace the lamp after use until the projector has been allowed to cool down for at least 30 minutes, and follow all instructions in "Changing the Lamp."
  • Do not touch the bulb or the lamp glass at any time. The bulb may explode due to improper handling, including the touching of the bulb or the lamp glass.
  • Remove lens cap before turning on projector. Failure to do so may cause the lens cap to reach high temperatures.
  • To avoid damaging the projector and lamp, allow the cooling fan to run for 2 minutes before turning off the projector.
  • Do not block the ventilation slots and openings on the projector.
  • Disconnect the power cord from the electrical outlet if the projector is not used for a long period of time.
  • Do not use the projector in an extremely hot, cold, or humid environment.
  • Do not use the projector in areas susceptible to excessive dust and dirt.
  • Do not use the projector near any appliance that generates a strong magnetic field.
  • Do not place the projector in direct sunlight.
  • Do not look into the lens while the projector is on; the bright light may hurt your eyes.
  • To reduce the risk of fire or electric shock, do not expose the projector to rain or moisture.
  • To prevent electric shock, do not open or disassemble the projector further than what is needed for lamp replacement.
  • To avoid damaging the projector, ensure that the zoom lens and elevator foot are fully retracted before moving the projector or placing the projector in its carrying case.
  • Turn off the projector and disconnect it from the electrical outlet before cleaning it. Use a soft cloth moistened with mild detergent to clean the display housing. Do not use abrasive cleaners, waxes, or solvents.

Posted on Jan 03, 2009

  • 1 more comment 
  • blueextc3221
    blueextc3221 Jan 03, 2009

    ***This should probably only be done if your warranty is expired, i'm not sure if taking apart your projector will void it or not, so do at your own risk. (Personally I had nothing to lose, the projector wouldn't work and Dell wouldn't help me so I had a $1500 pile of plastic with no good use)

    OKAY, if your projector is flickering, the picture is jumping up down left and right, then it shuts down and the lamp light comes on it is NOT THE LAMP!!! Don't let anyone tell you otherwise! Well,,, at least try this first. For some reason dust on the main board causes this, sounds ridiculous but it's true.

    I have a 3200mp and just did this 2 hours ago and the projector is as good as new.

    For a 3200mp:

    There are four very small phillips screws on the bottom of the projector... remove those.

    There is one very small phillips screw on the right hand side of the unit if you are looking at the projector from the front.... remove that.

    Now flip the unit so it is right side up and remove the top piece of plastic (The bottom doesn't come off at all. BE CAREFUL, THERE IS A RIBBON ATTACHED TO THE TOP PIECE SO LEAN IT AGAINST SOMETHING.

    Now grab a vacuum and your air compressor (or can of duster) and go to town. There will be huge plumes of dust come from under the lamp so keep your vacuum close.

    Next take the lamp out and clean off the glass lens (there is probably some dust on it)

    Put it all back together and it should work like a charm!

  • blueextc3221
    blueextc3221 Jan 03, 2009

    While you have it apart....

    DUST THE COLOUR WHEEL SENSOR. If you open up your projector as described originally and have the lens facing you, the colour wheel is just to the left where the lamp goes. To clean the sensor, 1st remove the screw holding the small green circuit board. With it detached, you will easily see the sensor, and probably some dust/dirt. remove the offending dust, and wipe it clean. Also, if you spin the colour wheel carefully, you will see a black tape section. Wipe round where this tape is - the sensor picks up the black tape to sync which is used to sync the colours projected by the dlp chip.

  • blueextc3221
    blueextc3221 Apr 12, 2009

    Thanks for the update :D

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There are four very small phillips screws on the bottom of the projector... remove those. There is one very small phillips screw on the right hand side of the unit if you are looking at the projector from the front.... remove that. Now flip the unit so it is right side up and remove the top piece of plastic (The bottom doesn't come off at all. BE CAREFUL, THERE IS A RIBBON ATTACHED TO THE TOP PIECE SO LEAN IT AGAINST SOMETHING. Now grab a vacuum and your air compressor (or can of duster) and go to town. There will be huge plumes of dust come from under the lamp so keep your vacuum close. Next take the lamp out and clean off the glass lens (there is probably some dust on it) Put it all back together and it should work like a charm for manuals of ur device the link is given below: http://support.dell.com/support/edocs/acc/2300MP/en/index.htm

Posted on Dec 27, 2008

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Here is the support information for your product

http://support.dell.com/support/edocs/acc/2300MP/en/index.htm

though I don't think there is anything about maintenance in it but it may give you an idea of the problem

Hope it helps

Posted on Dec 25, 2008

  • machadojr_fe Dec 27, 2008

    Kensington lock, is a lock that
    is inserted to the hole with a cable that can be attached
    around a table leg or other secure location so no one can
    walk away with the laptop while you're away. it seems that the lens is glued in place by the manufacturer.

  • machadojr_fe Jan 03, 2009

    First, though, most dust blobs are only
    noticeable on very dark scenes, as the blob itself is single colored.
    It occurs with dust gets in the light path between, say the beam
    splitter and one of the LCD panels, let’s say blue, or between the blue
    panel (actually they are all gray, but have different colored filters),
    and the dichroic prism that recombines the three color beams (R,G,B).

    If you get some dust in there - say in the blue light path, it will
    block some blue light from getting to the screen, where that dust sits
    in the path. The lack of blue will mean too much of its opposite color
    - a shift to yellow. In most cases, you just won’t see this, but, in a
    very dark scene, with some blue component, you will notice the shift
    from where the dust blob is.

    The good news - dust blobs are considered a warranty problem for most projectors.

    How to prevent dust blobs? Follow the manufacturer’s directions
    relating to cleaning filters. Some folks suggest, that when a filter
    starts getting really clogged, the air pressure on some parts of the
    filter become much higher, and cause some dust to get sucked into the
    projector - creating the potential for a dust blob. Also be careful and
    smart while cleaning/changing the filter.

    I found this information here along with some other information that may or may not be useful to you.


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U say dust spots, then blobs what do u mean exactly on how they look, have you cleaned the lens?

Posted on Dec 31, 2008

  • yadayada
    yadayada Apr 12, 2009

    problem solved then?

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