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Panasonic CT-36HL43G shuts down.

Discussion in 'Electronic Repair' started by David Farber, Feb 13, 2007.

  1. David Farber

    David Farber Guest

    This Panasonic CT-36HL43G shuts down about two seconds after the 144V supply
    relay kicks into the horizontal output circuits. I have the chassis removed
    from the set (it was too big to carry into the shop). The base drive to the
    HOT looks good until the 144V energizes. Then a small (extra) oscillation
    occurs at the base of the HOT on the low side of the input square wave. On
    the collector side, it is full of extra oscillations. I don't have the
    deflection yoke plugged and I don't know how much of a difference this would
    make in terms of fidelity of these waveforms. The last thing that happens
    before it shuts down is that the AC line current jumps to almost 3 amps.
    That seems a bit high for this test situation. I've checked all the power
    supply lines for shorts but have found none. I'm suspecting a faulty flyback
    but I'd like a second or third opinion.

    Thanks for your reply.
     
  2. David Farber

    David Farber Guest

    I replaced the flyback and that fixed it.
     
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