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AV and Multimedia Related Thread, Sanyo PLC-XE40 Yellow image in Technical; The image given by our Sanyo PLC-XE40 is very yellow. I've stripped it down and cleaned out the insides, including ...
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    Sanyo PLC-XE40 Yellow image

    The image given by our Sanyo PLC-XE40 is very yellow. I've stripped it down and cleaned out the insides, including mirrors etc (it wasnt too dusty inside, dispite surviving building works all summer), which made the image slightly brighter but still very yellow. Anyone any ideas to what may be causing it? Lamp isnt too old, replaced approx 8 months ago - although we dont have a new one to try, but I suspect its not the lamp. Thanks

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    Oaktech's Avatar
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    panel degradation... we have some ed-x12s and nec vt575s doing it. i reckon it's time for a new projector as the repair cost is very close to replacement.

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    Its glazing and scorching of the polerising filter due to late changing of the lamp, the UV output of the lamp goes up exponentially as it ages above around 2500Hrs it will start to burn the polerising filters the ultimatly the LCD panels, changing the lamps is the most important way to lengthen the life of your projector, Many people think its the heat that causes it, its not its the UV output of the lamp (like sunburn).

    Often you can change the filters but they then need setting up or you will no longer be able to get true black, not a job for anyone but a trained engineer as it has to be done while on.
    I hope you didnt touch the front silvered mirrors?

    Marc
    Projector Engineer

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    Quote Originally Posted by Marc-Engineer View Post
    I hope you didnt touch the front silvered mirrors?
    Mark, I followed the instructions on a previous edugeek thread re cleaning the sanyo projector - I did clean 3 mirrors in the light chamber - are these the ones that you say I shouldnt have? Be good to know as planning to clean another 2 tomorrow?

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    Its what we call screen burn. Cost of repair is expensive when compared to a replacement unit. Im afraid it will be a new unit as the problem will only get worse.

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    Never allow teachers to use no show, its the fastest way to kill the projector!

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    what's no show?

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    it allows the teacher to hide whats on their pc/laptop and stop it being displayed by the projector. ideal in tests

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    Yes the front mirrors on the optical engine are best left untouched use a dry air blower if you have one but this should also be done in a "clean" area and i mean dust free not an ordanary room or workshop, this colouration is NOT on the screens (LCD) it is the polerising filters that scorch from not changing the lamp at correct times or not having projectors serviced.

    Marc
    Projector Engineer

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    Great thread. I've got a couple of projectors like this. One has gone really yellow the other pink!

    Nice to know for sure that it can't be solved by cleaning or a bulb change!

    Butuz

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    Ahh pink is another thing that is normally dust on the Elements inside and can usually be deep cleaned and sorted easily.

    But not a job for a school a deep clean is a complete strip and rebuild (cost around 70).

    Marc
    Projector Engineer

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    Like others who have mentioned, get rid of it.

    We had those models of projectors in my last place and had the same issues.

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