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Repair/replace Advice Needed

Discussion in 'Electronic Repair' started by Mitchell Freeman, May 31, 2005.

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  1. Hello all,

    I have recently acquired (for free) an older Mitsubishi VS-5071 Projection
    TV (1993 model) that has been in storage for a few years, and barely used
    before that. The color seems fine, however there is a noticeable amount of
    distortion in parts of the picture. Whole rows of the image "jiggle"--much
    in the way a VCR image played when the tracking was off (too fast or too
    slow). Not the "snow" kind of noise, mind you, just the fluttering left and
    right of image in portions/rows of the screen (partial pincushioning?). The
    image distortion seems to be worst near high light/dark contrast areas, but
    it does happen even in lower-contrast areas. The distortion happens mostly
    near the bottom 1/3 of the display, but is not limited entirely to that area
    either.

    I have tried a number of the obvious steps: different inputs (EXT-1, 2, and
    3), different devices (VCR, Satellite Box, Video Camera), turning down/up
    the contrast and brightness settings on the set. I've crawled over the web a
    good amount and cannot locate the user guide (the set didn't come with one
    from my source).

    I have two basic questions:

    1) Is there a simple self-service adjustment I can perform to reduce or
    eliminate this distortion? I am not afraid to open the unit and service it
    myself (I have already done so just to clean out the inside chassis), and am
    pretty confident that I could perform a simple adjustment if that is all
    that is required.

    2) Is it worth it to have this set serviced/adjusted professionally, or
    would the cost of that kind of home-service-call be so expensive (above
    $300) that I should get rid of the set and get something else?

    Any advice here would be most appreciated.
     
  2. Art

    Art Guest

    Inspect the set to see if this model has the infamous PIP module, if it
    does, either rebuild it regarding the caps or jump it out. ESR the caps in
    the set, you will find many marginal and some outright defective devices due
    to age of the set. may want to have a tech who has experience with quite a
    few MGA sets have a go at the thing, may cost a few quid but if the crts are
    in good shape you may end up with a nice set.
     
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