Incorrect Wiring Explosion Repair

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  • March 31, 2015 at 11:42 am #7578
    jerometwell
    Member

    Early one morning while not paying attention, I wired my TinyG v8g the wrong way, and one of the components exploded (D13). I Looked through the schematics to find that it is GSOT24C, an ESD protection diode array.
    I have already ordered & received my new board – is this old board recoverable? the diode burned up, but obviously I’ve no idea about other component damage as everything else looks the same.

    Could I get a new GSOT24C and get it working again? Or is the whole board toast ? Looking for advice here!

    March 31, 2015 at 4:55 pm #7579
    cmcgrath5035
    Moderator

    Hmmm, here is the schematic page

    Should we assume you connected input power with reverse polarity?

    I would worry about C2, and the power converters U7 and U8.
    Do you have an ohmmeter?.
    Still have continuity between the power jack + and the U7 and U8 pins?
    There could be hidden trace burnout.

    If you have a small (self current limiting) 12V wall wart around, you could try powering the board from that and see with a voltmeter if there is any life in U7 and U8.

    Unless you are really good at SMT board repair, I wouldn’t waste a lot of time on it.

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