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RCA TV 32F530T pix tearing horizontal lines

Discussion in 'Electronic Repair' started by Cailloux, Dec 16, 2007.

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  1. Cailloux

    Cailloux Guest

    Starting problem Dead TV. RCA 32F530T, chassis ATC113CD4, year 2004. I
    Replace flyback # 257807 along with the H-O/P XSTR (2SC5148 original
    Toshiba).
    See pictures
    I do a lot of research on the web and nobody has experienced this
    problem.
    Any suggestion? Bulletin note? Jungle ic? Damper diode failure?
    Flyback incompatible???
    Someone saw that before?
    Thanks
    Pierre
     
  2. AJ

    AJ Guest

    Seems many of the after market LOPT being supplied for the RCA sets exhibit
    all kinds of similar symptoms whne used. Have seen the same issues many
    times when attempting repairs on these RCA sets. No support from Thomson
    Corp at all!! Remember when RCA was a major developer in consumer
    electronics, now that 3 letters stands for 'Real Crappy Appratus'. IMHO.
    Seen way too many of their sets, only 2-4 years old, that specific parts are
    not available.
     
  3. Cailloux

    Cailloux Guest

  4. Meat Plow

    Meat Plow Guest

    That's a bad case of Moire. You might Google your model number
    and add Moire and see what shows up.
     
  5. PeterD

    PeterD Guest

    It is bad,but I don't think the OP is asking about that, but instead
    the jagged tear that most of the images show.

    It looks like he has two problems, not one. Wonder what the horizontal
    sweep and sync looks like on the scope?
     
  6. Cailloux

    Cailloux Guest

    The picture is clear, the moire effect is due to the camera. The
    tearing lines seems to be a sync or timing problem.
     
  7. Cailloux

    Cailloux Guest

    Some people have reported problems with strange behaviour when
    replacing flyback. The horizontal circuit its a feedback loop, it is
    not easy to synchronise on the specific tearing lines. Service data
    and data sheet are not in details. I replaced some discret parts, and
    change some value (resistors, caps) just to see the behaviour. May be
    its the jungle chip, gemstar module, software correction...
    I already spend 90$ on that %|#&=....
     
  8. Meat Plow

    Meat Plow Guest

    Ahh ok, just didn't look at it well. Now, at what stage in the horizontal
    would cause that without knocking the sync out altogether?
     
  9. Meat Plow

    Meat Plow Guest

    Yeh I'd sure like to get a look at that.
     
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