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AV and Multimedia Related Thread, Is this projector mendable? in Technical; We have a NEC VT49 which has started to show a large yellow rectangle on the screen. It isn't overall ...
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    witch's Avatar
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    Is this projector mendable?

    We have a NEC VT49 which has started to show a large yellow rectangle on the screen. It isn't overall yellowing, it is a patch that actually looks like it has been drawn!
    I presume this is dust?
    The projector has been up for 3 years and the date on it is Jan 2007.
    I have never had to get one mended/cleaned (no, no time to even attempt it myself). Is is worth doing and can anyone point me in the direction of a good company to do it down here? Thanks

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    Hightower's Avatar
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    It should be fine after a good optical cleaning - we used to send ours away all the time. Do your LEA support team not offer this service?

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    HaleStorm's Avatar
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    its either that of the coating on one of the internal lenses/light gates peeling, or as you say its a buildup of gack inside the light channels, it might be worth asking if your local university have a clean lab that do projector repairs, we have Sheffield and Hallam University's about20mins away from us and they both offer local schools cleaning services for projectors for 15quid per unit

  4. Thanks to HaleStorm from:

    bladedanny (17th June 2011)

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    Butuz's Avatar
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    Its quite likely to be the bulb. Have you got a spare bulb you can try in it?

    Butuz

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    Hightower's Avatar
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    Quote Originally Posted by Butuz View Post
    Its quite likely to be the bulb. Have you got a spare bulb you can try in it?

    Butuz
    Will a 15w energy saving screw bulb fit

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    witch's Avatar
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    Do you really think it might be the bulb? I have never seen a bulb produce a yellow patch on the screen?

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    HaleStorm's Avatar
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    it could be ive seen a buld where the silver reflective stuff behind the filament has peeled off and it made the picture go all kinds of crazy

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    witch's Avatar
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    LEA don't offer a cleaning service and I don't think Bournemouth Uni does either. I will have a look and see whether I have a spare bulb to try...

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    Hightower's Avatar
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    <pedantic>lamp</pedantic>

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    witch's Avatar
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    oh go boil yer 'ed

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    Hightower's Avatar
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    Don't like it when the shoe is on the other foot eh?

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    @witch:

    It will be part of the prism and if it is like certain Hitachi ones then you would be better off purchasing a new one as we do our own deep cleaning and this is what we have found to be the case.

    If on the other hand it has the different coloured glass slides like the Sanyo's then you can use propanol and special lens cleaning clothes to effectively bring up as good as new, we have deep cleaned around 10 lately which only took us 20 mins each.

    Have a look on the internet to see if someone has opened one of those models up and have a go yourself, it will cost you nothing but time

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    Never really seen the need for a clean lab etc... I just take them home and strip and clean them on my kitchen counter... if it gets to the point where the displays need detaching from the prism then that's the only time it gets tricky but patience and blutak sort that (blutak screens in place on prism, lightly tighten screws, fire it up, and tap edge of each screen til the pixels all lineup properly, then tighten screws). Done it to Hitachi, NEC and Epson brands without any major fuss.

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    Quote Originally Posted by HaleStorm View Post
    ...we have Sheffield and Hallam University's about20mins away from us and they both offer local schools cleaning services for projectors for 15quid per unit
    Do we? Useful to know, thanks .

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    Quote Originally Posted by witch View Post
    Do you really think it might be the bulb? I have never seen a bulb produce a yellow patch on the screen?
    It could be my dear!! Take out the bulb and then see if the yellow patch dissapears??

    Butuz

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