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Blaupunkt Television HT Help

Discussion in 'Hobby Electronics' started by Ren, Oct 23, 2003.

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  1. Ren

    Ren Guest

    Hi there

    I have picked up a Blaupunkt MS 70-109VT-M Television Set.
    When powering up all that was heard was a Tick Tick noise.
    I traced the fault to a Trasistor that was switching the the Line output
    transformer.
    This Transformer then feeds a separate High Tension Transformer.

    I found that Transistor (BU508AG) was in shorted condition.
    I found a suitable replacement (BU508A) which has a higher wattage/current
    rating.

    As soon as i had installed the BU 508A and made a few other checks of
    surrounding components i energised the set.
    Instantly the Screen lit up, and displayed a good picture of snow.
    Shortly after (Only seconds) there was a Crack. Which only sounded like a
    high voltage Crack..

    Upon a close look at the HT transformer, I can see a Crack in the Caseing.
    This is shorting or flashing over to the Line output transformer.

    I havent lost the BU508A yet, probably due to the higher Current.Wattage
    rating..

    I was wondering, Whats my chances or options of getting a replacement
    Transformer.
    Is there a known equivilent ?.
    I have no Circuit diagram or parts listing for this Tv, as will most things
    i have a go at repairing.

    Does anyone have an idea of what i could do..
    The Set itself looks quite a styley set..


    Thanks.

    Ren (Nz)
     
  2. Ren

    Ren Guest

    Thanks John..

    I managed to source one from a local Electronics spares warehouse here in
    Nz.
    Cost: $55 NzD..
    www.tradetech.co.nz

    Cheers

    Ren
     
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