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HV arc question

Discussion in 'Electronic Repair' started by -ex-, Sep 12, 2005.

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  1. -ex-

    -ex- Guest

    Set in question is a late model Sharp 25". I'm electronic savvy but not
    a TV guy.

    It has been really humid here lately and the set has experienced arcing
    around the HV connector on the picture tube. Usually it would stop
    after a few seconds according to wife and kids.

    It has only gotten worse so I checked it out today. There are burnt
    traces in the rubber seal and even some etching in the glass immediately
    around the connector. I cleaned it up the best I could.

    The LONG arcs have stopped now but I still hear some sizzling inside the
    connector. What is the proper remedy for this? Is there a HV
    insulating coating that should be applied? Replace the rubber cap?

    I'll have to mail-order whatever I need so suggestions as to
    brands/vendor would also be helpful.

    Thanks in advance,
    Bill in Puerto Rico
  2. James Sweet

    James Sweet Guest

    You have to clean it up real well since the carbon is conductive, scrub
    every bit of it off that you can. Then get a tube of HV dielectric grease,
    normally automotive parts stores sell it in the ignition section, just smear
    the suction cup underside with it and put it back together.
  3. And make to discharge the CRT before you touch it! :)

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  4. -ex-

    -ex- Guest

    Sam Goldwasser wrote:

    Thanks guys. I scrubbed it a bit more with acetone and toothbrush and
    all arcing has now stopped. I should be able to get the HT grease
    locally so I think I'm good to go.

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