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Horizontal bar on Sears TV

Discussion in 'Electronic Repair' started by Jim Adney, Dec 1, 2003.

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  1. Jim Adney

    Jim Adney Guest

    I've just been to my mother-in-law's apartment to look at her TV.

    It's a Sears-Roebuck model564-42110900, built 9/79.

    I know it's old by most people's standards, but it's fine for her, or
    for me, for that matter. I need some advice from some of the older TV
    techs here. Here's the problem:

    It's got a white horizontal bar across the screen. The bar is narrow,
    only about 5-6 sweep lines, and it always stays in exactly the same
    place, about 3/4 of the way down the screen. The picture is still
    visible thru the bar, but it's distorted (bent?) above and below about
    an inch each way.

    Since this happened the vertical sync is not too good and the vert
    sync bar usually rolls downward, sometimes seeming to "catch" at the
    white bar.

    I haven't been inside the set yet, but I'm perfectly willing to look
    to see what I can do. Don't worry, I'm familiar with, and know what to
    be cautious of, inside the set.

    I'd just like to get some more experienced advice before I try.

    I'm hoping this could just be a simple dried out capacitor somewhere.
    Is this likely?

    thanks,

    -
     
  2. David

    David Guest

    Capacitor problem, possibly and likely, simply ESR the ones in the vertical
    circuit.
    For more specific responses post the chassis number and OEM manufacture as
    SEARS used many OEMs.

    If it is the old Sanyo chassis with the JU.... ceramic vertical output
    module, you may not be able to find a replacement. Check Ohio's Nesda page
    for information on the specifics for that one.

    Honestly, how big is the tv set and how much use has it seen. While it
    certainly is possible the picture tube is still good, there is also a good
    chance if it has been used a lot the tube is getting a bit long in the tooth
    and will not produce a good crisp image. Plus there is the added problems
    with capacitor aging all over the set in one that old. In other words, do
    not try and spend a lot of time or money on it, get in, ESR the vertical
    capacitors, give a shot at fixing it, pull out if there are multiple issues.

    David
     
  3. Jim Adney

    Jim Adney Guest

    This is all I found on the back of the set. If I open it up am I
    likely to find more info inside? I really have no idea how I would go
    about recognizing the OEM. (But I'd appreciate an explanation.)

    -
     
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