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TX100 - strange circles

Discussion in 'Projectors, Screens & Video Processors' started by moco, Nov 13, 2004.

  1. moco

    moco
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    I see a strange artifact with my Hitachi TX100.
    It is hardly noticable and seen only when the image is completely black, so it does not bother me as such, but may be it is related to something that might get worse.
    When the image is black, I see 3 small circular areas (at what seems as random spots) which are a bit lighter than the rest of the image. These circles grow or reduce in size, when the iris is opened or closed.
    Does anyone have an idea what this is?
     
  2. MichaelWRX

    MichaelWRX
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    Dust on LCD panels
     
  3. moco

    moco
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    I thought dust blobs was something more easily seen and disturbing.
    All 3 circles are exactly the same size. Does that make sense?
     
  4. UrbanT

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    Yep, thats exactly how mine look. Its quite possible they are dust specks, as opposed to big blobs. Get a can of compressed air, take the air filter off the side (and clean it), and then blow air all around the inside of the projector through the hole where the air filter was. This should remove the specks. Remember to keep the can of air held upright at all times. :)
     
  5. wandgrudd

    wandgrudd
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    That sounds right mine has got the same thing. How many hours have you two got on yours i have just over a 100 and have about 6 dust blobs. hope I can get rid of them when my air can comes.
     
  6. UrbanT

    UrbanT
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    Over 2 hundred now. I think you will find the air removal does the trick :)
     
  7. moco

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    I have a bit under a 100 hours on it, and 3 of these specks. As I said this are very minute and do not disturb viewing at all (yet).
     
  8. moco

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    Did it, but no change.
    The strange thing is that after removing the filter, what I see in the opening does not look as if it will allow the blown air to go inside and remove the dust from wherever it settles.
    Is there some specific opening I should point to?
     
  9. wandgrudd

    wandgrudd
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    you have removed the cover(black/dark blue) and the filter(black) ? (dont mean to make you sound daft.)

    should be loads of room for the air
     
  10. moco

    moco
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    Well, it does make me sound daft but luckily I am not :laugh:

    I did this at the opportunity of cleaning the filter at 100 hours. The filter was removed. Still, it is not clear where to point the air flow. You cannot see the optics or panels.
     
  11. UrbanT

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    Thats the point with this method, you cannot actually see what you are doing. Once you have the air filter removed, you have this large hole open. The panels are towards the front, in the middle. Stick the straw from your air can into the machine, and give the whole area a good blow.

    This method works for me fine :)
     
  12. wandgrudd

    wandgrudd
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    UrbanT you must be lucky because my air can came yesterday and I tried for about 1/2 hour last night to get rid of them but no luck. So looks like mines going in for a service. Funny I tried so hard to keep room clean and it still happens.


    :mad:
     
  13. moco

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  14. UrbanT

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    Ooo-er missus :eek:

    As you have it mounted upside down, its all along the bottom. The LCD panels will be above the straw tip, so try and bend the straw upwards when you stick it in, and give it a good spray :)
     

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