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Sony Trinatron 27 "TV Lost Filament

Discussion in 'Electronic Design' started by Phil, Apr 20, 2007.

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  1. Phil

    Phil Guest

    I have a Sony 27" Trinitron TV , sound and remote work , lost filament in
    CRT , have worked on PS and HOT on this model before and had success ,
    wonder if anybody has had this problem , used to have access to schematics
    in local library , they did away with them.
    Phil L.

  2. Try Give them the Brand and Model numbers,
    as well as the symptoms and they may be able to help you.

    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
  3. Phil

    Phil Guest

    Thanks , yes I did post there , most of the time I have a little time to
    wait , looking for quick answer I guess , Phil
  4. SioL

    SioL Guest

    Top posting is not very popular around here.

    If you don't take the time to read the answers, why
    should anyone take the time to solve your problems?

    Don't you think its rude to ask for help and than not
    even make an effort to read it?

  5. Alex

    Alex Guest

    hi Phil
    without schematic things is often more
    simple. locate the fillament
    connection on the picure tube base, remove the pcb and measure with an
    ohmmeter wheter the fillament is broken or not.. eventually apply 4
    volt to the heater- the current scould be around ½ ampere,and
    fillament glows .
    If this is so,then it is normaly not complicated to follow the wires
    for fillament. one goes to gnd (normaly).. and you will find an O/C.
  6. Phil

    Phil Guest

    Thanks to all for your help and please excuse my flawed etiquette , the term
    top posting had not crossed my path before , as an old retired 737 pilot , I
    will try to get myself up to speed again , Thank You .
  7. Don't know if it applies to your model but just yesterday was working
    on a small (13") Sony monitor that has a resistor in series with the
    filament. Bad solder joints on the resistor prevented filament power.
    As another said, ohm out the actual filament on the CRT with the board
    off the tube. Filament failures are actually pretty rare while bad
    solder is much more common.

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