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Sony KV27V22 will not power up

Discussion in 'Electronic Repair' started by al, May 28, 2004.

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  1. al

    al Guest

    Hi,

    I have a Sony model KV27V22, will not power up upon inspection I
    noticed cap C613 on the Power Supply Module was burnt out, I found out
    it was a 1000pf cap and replaced it, it still will not power up,
    nothing else is visually wrong, Any pointers what else I could check..

    Thanks in advance for the help,
     
  2. Jerry G.

    Jerry G. Guest

    Check that the proper outputs are leaving the power supply to start with. If
    not, then verify the power supply for improper operation. It is possible
    that something in the set failed, and may have also damaged the power
    supply.

    The power supply and the horizontal output stage closely interact with each
    other. Usually both the power supply and horizontal output stage may have
    failures at the same time.

    If you are not experienced in servicing these TV sets, and not properly
    trained and equipped for this type of work, it would be an intelligent
    decision to have an experienced Sony service centre do the repairs for you.
    These sets can be a challenge for even the most experienced service tech.
    There are also some very serious safety issues in servicing these TV sets.

    --

    Jerry G.
    =====


    Hi,

    I have a Sony model KV27V22, will not power up upon inspection I
    noticed cap C613 on the Power Supply Module was burnt out, I found out
    it was a 1000pf cap and replaced it, it still will not power up,
    nothing else is visually wrong, Any pointers what else I could check..

    Thanks in advance for the help,
     
  3. RonKZ650

    RonKZ650 Guest

    I'd assume when the capacitor burned up Q601 and Q602 2SC4834 transistors both
    are shorted and resistor R607 .1 ohm is open on the board you are working on.
    Ron
     
  4. Art

    Art Guest

    Also probable the horiz output may be blow, indicative of the lousy
    soldering in that particular deflection circuitry.
     
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