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Lifted too much solder - none left!

Discussion in 'Electronic Repair' started by [email protected], May 3, 2007.

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  1. Guest


    I hope somebody can help me with this. I was soldering a few wires on
    an electronic board which has very fine contacts (Apologies for the
    terms but I am a real sunday solderer!). It was going fairly well
    until I used soldering braid to clean up one and ended up with no
    solder at all on the contact on the board. Now I seem to have a black
    dot instead of any solder on the point and therefore I cannot complete
    my work. Can anything be done to salvage this board??

  2. GregS

    GregS Guest

    I try to stay at about 625 degrees. Too much heat will lift traces.
    You need to rebuild the trace or pad, usually with a piece of wire.

  3. Sofie

    Sofie Guest

    You didn't "lift too much solder"..... you pulled up the solder pad, by
    probably using too much heat for too long. As another reply suggested you
    can run the wire through the hole and use a short jumper wire to connect to
    the circuit... unless, of course this is a multi-layer board and you pulled
    the plated through hole out, then you may be screwed.
    You may want to scrape the black dot with an exacto knife... if there is
    metal under there you can tin it and re-solder... in that case, you dodged
    a bullet and you are very lucky... go buy a lotto ticket.
    Best Regards,
    Daniel Sofie
    Electronics Supply & Repair
    - - - - - - -
  4. Guest

    Thanks a lot for all your help... Now I know why I should have got a
    proper soldering iron in the first place. I have one of those all ON
    or OFF and the heat was probably too high for this. I think my only
    option left is to solder some hookup wire directly on the pin of the
    chip. With a good iron this time, do you think this is feasible?
  5. Sure, depending on how careful you are. You should pratice on some junk
    electronics that you don't need so that you don't screw up your good board
    more. I migt also suggest finding some wire wrap wire to do this because
    small wire is eaiser to deal with than large wire.

    - Mike

    - Mike
  6. Tim

    Tim Guest

    Yup, and you should also heat-sink the pin, so you do not damage the
    chip soldering close to the body. You would not want to cause an
    intermittent after fixing the pulled pad issue.

    - Tim -
  7. Another handy tip is to tin your wire first so you don't need nearly as much
    time putting heat on the chip pin.

  8. Chris Jones

    Chris Jones Guest

    Get some old boards out of some electronic equipment at the dump (ideally
    with similar component styles, pin spacing etc.), and practice on those
    until you are confident.

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