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Projection TV shorted yoke

Discussion in 'Electronic Repair' started by [email protected], Jun 2, 2006.

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  1. Guest

    I have a JVC 56" rear projection TV (model AV-56WP30). I have been
    troubleshooting a
    problem with the red projecting a wavy line near top of screen (see
    http://www.signaturefactory.com/dlip/tv2.jpg). I have discovered that
    the input into the yoke from the convergence board is shorted (I didn't
    check whether it was horozontal or vertical). I found this by
    disconnecting the output from the convergence board and measuring
    resistance accross each of the two outputs +/-. My question is, is
    this usally a simple fix and what should I look for?
     
  2. Guest

    What is the inductive impedance of the yoke at 60Hz and 1KHz?

    Are you sure it is shorted? What resistance did you read? Normal is
    usually around 2 to 8 ohms depending on the specific yoke design.
     
  3. Guest

    I don't have a meter here to measure that but if necessary I can get
    one from work.
    I took the yoke out and found that it is not shorted. Resistance of
    both circuits is around .5 ohm. I guess I did not find my problem.
     
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