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Discussion in 'Electronic Repair' started by Dani, May 9, 2007.

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  1. Dani

    Dani Guest

    Model # 27F501TDV A Chassis # M5Q18, no vertical, the IC was blown
    apart. Replaced the IC LA78041, 2-100 uf 50 volt, 1-4.7 uf 50 volt,
    1-3.3 uf 250 volt caps, & 30 volt zener, then @ turn on, the IC blew
    apart in an instant. Is this common failure for this unit? Dani.
  2. Sofie

    Sofie Guest

    No.... it is not a "common" problem with this chassis.... did the zener
    diode blow too! (could be a clue)
    ...... you may have done so already but I would look for shorted diodes
    around the chip circuitry... also look for proper B+ going to the chip,
    make certain that it is not too high, unregulated or worst case un-rectified
    because of a shorted rectifier diode. Lastly, "ring test" the yoke
    Best Regards,
    Daniel Sofie
    Electronics Supply & Repair
    - - - - -- - - --
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