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Sony TV

Discussion in 'Electronic Repair' started by Vincent Schmitt, Aug 28, 2012.

  1. Hi!
    Sony KDF=E42A10, Thd set has a line across the picture, no distortion, I
    think it is the light engine.
    AmI right?
    Thank you
    Vince
     
  2. J.B. Wood

    J.B. Wood Guest

    Hello, and I don't recall seeing any component labeled "light engine" on
    the schematic diagram of a television receiver ;-). I assume from your
    posting that you've got a set that uses a CRT (picture tube) as a
    display. A thin white horizontal line indicates a malfunction in the
    vertical sweep circuits. It could be a vertical output transistor(s), a
    short/open in the coil of the vertical deflection yoke or something in
    the circuits comprising the vertical sweep oscillator. Also, a
    component may not be defective - a broken/cold solder joint(s) can also
    be the culprit. Sincerely,
     

  3. The KDF-E42A10 is an LCD rear-projector. No deflection circuit as such.

    I don't think the OP said a thin white line - just "a line".

    Could be almost anything. This model has a tendency to develop a red-blue
    shading at the top and bottom 1" or so because of (probably) a bad
    polarizing filter. Generally the whole light engine must be replaced because
    individual parts for the optical engine are not sold.

    Mark Z.
     
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