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Philips tv shuts down after one hour

Discussion in 'Electronic Repair' started by Martin, Feb 25, 2004.

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  1. Martin

    Martin Guest

    I have a Philips 25ST1704/02B. everything works fine for one hour,
    then the TV shut down. The standby LED blinks. There are no problems
    with the picture or the sound before the shut down. After 10 minutes
    when i cooling grills are cold I can not turn it back on. After 20
    minutes I can and the tv will work for 30 minutes.

    Hope someone can help.
     
  2. eddumweer

    eddumweer Guest

    Check the pcb for bad solder contacts.

    Greetings Peter
     
  3. Jerry G.

    Jerry G. Guest

    Most of the time, this is caused by capacitors in the power supply and scan
    circuits becoming temperature sensitive. You can use a heat gun and an ESR
    meter to locate these. Heat the suspect caps, and while warm take the ESR
    measurement. This way you can weed out all the bad caps. Don't be
    surprised to find about a dozen or so of them in your set, that do not meet
    specs anymore.

    --

    Greetings,

    Jerry Greenberg GLG Technologies GLG
    =========================================
    WebPage http://www.zoom-one.com
    Electronics http://www.zoom-one.com/electron.htm
    =========================================


    I have a Philips 25ST1704/02B. everything works fine for one hour,
    then the TV shut down. The standby LED blinks. There are no problems
    with the picture or the sound before the shut down. After 10 minutes
    when i cooling grills are cold I can not turn it back on. After 20
    minutes I can and the tv will work for 30 minutes.

    Hope someone can help.
     
  4. James Sweet

    James Sweet Guest

    I would suspect soldering over caps, caps usually get better as they warm
    up.
     
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