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Zenith shut down

Discussion in 'Electronic Repair' started by Golf, Apr 8, 2006.

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  1. Golf

    Golf Guest

    Model #B25AO2Z - Set attempts power up as seen by horizontal flash on
    picture tube but never comes up. Hitting the power button repeats the
    symptom. I was guessing this may be in the horizontal section so Iv'e
    checked several caps in the area, but haven't replaced the HOT since it
    checks good and I don't have a spare. Nothing found bad yet. I do not
    have the schematic but was hoping someone here may be familiar with
    this set and symptom, and path forward. Thanks group, still a beginner
  2. Guest

    If you see any light or flash on the screen then possibly the HOT and
    the circuitry around the flyback is OK. It is possible that the
    television is shutting down as a result of x-ray or HV protection being
    triggered because of B+ regulation problems. Check the raw
    unregulated B+ rectifiers and filter then check the regulated output
    for ripple and regulation.
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