Mistubishi HDTV tweaking question

Discussion in 'Displays' started by Joe Szott, Aug 20, 2003.

  1. Joe Szott

    Joe Szott Screenwriter

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    I have a Mitsubishi WS-46809 (uhh, I think that's the right # always forget) that we use for our main TV and home theater. I've been pretty happy with it on the whole and attached a few red push filters and adjusted VSM to preference.

    The problem I've been having is that I'm almost 100% sure that some of the input image for 480i/480p is getting cut off. That is to say that the tubes are trying to display the image larger than what is available on the screen. So in movie when the subtitles or credits stretch to the edge, they are cut off. So some of the image is lost as well, I'm assuming?

    Is there any way to correct this easily without the help of an ISF or other expert? I could call the people through the TV warranty, but they are typically clueless and mess my set up worse than they fix it. I have done some poking around in the Mitsu service menus, but I don't change anything unless I absolutely know what it does. Is there an easy way to correct this problem, or is it just too complex to try and tackle on one's own?

    Any help or advice is appreciated...

    EDIT : I also have the Avia calibration DVD, if there is anything on there that can help me tune this setting...
     
  2. Paul Bryan

    Paul Bryan Agent

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    There is a test pattern on Avia, I think it's called overscan, that will help you identify if this is indeed the case, and how much, and where the overscan is occuring...

    Also, if you become a paid member to another forum, the home theater spot, there is a weatlh of Mistubishi tweak info that will guide you through the sevice menus to fix things like overscan, and geometery issues...

    --Paul
     
  3. Joe Szott

    Joe Szott Screenwriter

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    Paul,

    So overscan is something you can correct yourself, it's safe to mess around with (having the info beforehand, obviously)?
     
  4. Gregg Loewen

    Gregg Loewen Video Standards Instructor, THX Ltd.
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    Hi guys....anything offered elsewhere can also be found here :)

    Hi Joe, the AVIA overscan pattern will allow you to measure your overscan...to be safe you want 5% all the way around the image.

    You can adjust this with Hsizing and vsizing controls but this will mess up your geometry and convergence also...so if you want to change the overscan be prepared to get in up to your elbows. FWIW,,,this is part of the standard service when I do a calibration.

    Best wishes and always feel free to email me or post here with further questions.

    Gregg
     

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