Question about Hitachi 57F500 57" Rear Projection HDTV-Ready Television

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Spots on screen

As I was cleaning the screen I noticed 3 very small spots that at frist looked as if they dropplets from the cleaner. The largest is about 1.5mm in diameter the smallest .5 mm dia. Right side of screen from center to the upper right corner. My guess is that there is something on the mirror? Any suggestions, Thanks in advance

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  • djerryc Dec 09, 2007

    The spots do appear to be within the sandwich. Is removing the outer fresnal something I can do as a low tech guy? I don't understand the PS, eg fluids? cans? I use screen cleaner for laptops, not windex.....Thanks Bill



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If it looks fluid it's more likely something like windex or whatever you were using to clean the outer fresnal screen with got between the fresnal and lenticular screens. There are actually two screens there sandwiched together...

Posted on Dec 09, 2007

  • William Rayburn
    William Rayburn Dec 09, 2007

    PS:: Couls also be contaminated EG fluids in one of the cans..

  • William Rayburn
    William Rayburn Dec 10, 2007

    Yes, the face of the unit can be removed - just pay close attention to how the unit comes apart.. I believe on most Hitachi Tvs the lower panel pops off and then you remove some screws just below the screen... The screen frame then slides up but be careful there are a grouping of wires that will still be attahed to the button area... Then, from the back of the screen you should be able to see how the panels come out and then just unsandwich them... reverse the process for re-assembly...

    Hope this helps!


    PS. When you're in that area you can take a flashlight and shine right down into each of the cans to check to see how clear they are... Use windex and paper towel on the mirror and lens of each can...



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