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Hello ,and Help - PCB Track Repair

Discussion in 'Troubleshooting and Repair' started by Kural Electric, Jul 7, 2013.

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  1. Kural Electric

    Kural Electric

    5
    0
    Jul 7, 2013
    Hello how are you? This is my PCB watch board, and circled their is a pad that has halve lift of and what would be a good solution to repair it?
    Also it must be Flat on this side ,specially were I circled it.


    [​IMG]
     
  2. eKretz

    eKretz

    251
    27
    Apr 8, 2013
    I have successfully repaired a few traces using flattened copper wire. For something like that you could use copper foil or shim of the proper thickness. First cut it out to the desired shape and tin it. Then use some Kapton (polyamide) tape to hold it in place and solder it to the old trace. Use some high temp epoxy to fasten it to the PCB and solder in your component.

    Another approach would be to drill through the board in a couple of inconspicuous places (that are free of traces) and use an insulated wire to connect the origin of your signal and the component on the opposite side of the board. It almost looks like you could use the via at the source to solder the wire.
     
  3. Kural Electric

    Kural Electric

    5
    0
    Jul 7, 2013
    thank you very much ,that was all good of you, yes i see what you mean. ill have to think about what to do now next.
     
  4. Tesla

    Tesla

    165
    2
    May 10, 2010
    I would fix it like it appears you already tried ... with a piece if wire-wrap wire. Make sure you made proper contact with that lower pad (with ohm-meter).

    Also remember, that sometimes hole-thru pads often conduct through to the pad on the other side. Sometimes running the wire through the hole helps.
     
  5. Kural Electric

    Kural Electric

    5
    0
    Jul 7, 2013
    thanks
     
  6. Kural Electric

    Kural Electric

    5
    0
    Jul 7, 2013
    PCB Trace Repair



    [​IMG]
    Broken Trace

    [​IMG]
    Tape

    [​IMG]


    [​IMG]
    Exacto Knife slice tape to fit


    [​IMG]
    [​IMG]
    Put slice tape around the broken trace


    [​IMG]
    Silver Conductive Wire Glue Paste + tiny brush size #00


    [​IMG]
    Handy hands hold PCB and prepare to repair trace


    [​IMG]
    Brush Conductive Wire Glue between broken trace


    [​IMG]
    Allow the Paste to dry approx 1 minute


    [​IMG]
    Remove the tape and you have a perfect trace


    [​IMG]
    Examine the trace to be sure


    [​IMG]
    [​IMG]
    Multimeter to test Continuity
     

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  7. Tesla

    Tesla

    165
    2
    May 10, 2010
    Cool pics and tutorial. Seen that stuff but never used it. We always just used the wire-wrap wires (stripped) or thicker wires depending on amps.

    So, does the device work now?
     
  8. Kural Electric

    Kural Electric

    5
    0
    Jul 7, 2013
    [​IMG]


    Working OK - The paste drys a silver almost white hard enough bond together the trace. You get the exact same power like any other wire/trace. This PCB board is from a 1984 calculator watch ;here is another trace beneath this PCB ,Tidying up everything
     
  9. elebish

    elebish

    177
    12
    Aug 16, 2013
    Drilling a hole in a PCB

    Be careful when drilling through PCB's! Check to see if the board is a multi-layer board before drilling. If the board has 'vias', it proabably is. A via is a small plated through hole in the board that connects the different lands internal to the board. Ed.
     
  10. elebish

    elebish

    177
    12
    Aug 16, 2013
    You might want to scrape off the carbon deposits created by the burn. Carbon traces will conduct because they act like resistors. Your board is obviously only a 2 layer board. Ed.
     
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