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VS Dash Green Circuit Board Repair

Discussion in 'Electrical Wiring / Questions' started by Macca177, Mar 26, 2020.

  1. Macca177

    Macca177 Member

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    Heya,

    Hopefully not a dumb question, but can I repair/improve the contact around the base of the globe holder? Just this one globe keeps going on and off and that circuit doesn't look the best.

    Circuit pen/paint okay? (about $35 from office works etc) or is it okay to take to it with solder? Is there another product that would help the contact best - I've not played with this green boards like this before.

    Cheers
     

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  2. 07GTS

    07GTS Well-Known Member

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    crush the contacts on the globe (lightly) so it holds a little tighter then dont do it up all the way just go to a spot that it work good in
     
  3. ltdslip

    ltdslip Member

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    try cleaning it up first with a pencil eraser,
    if you're handy with a soldering iron, solder the copper to build up the surface
     
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  4. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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  5. krusing

    krusing Well-Known Member

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    I second that,
    maybe clean the contact surface with some fine wet and dry sand paper,
    then apply a thin film of solder [as mentioned above], and that should fix it.
     
    Last edited: Mar 31, 2020
  6. Macca177

    Macca177 Member

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    Perfect thanks for the replies.
     
  7. ltdslip

    ltdslip Member

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    careful with the sandpaper, you dont want to remove any copper, just clean the contact area
     
  8. 07GTS

    07GTS Well-Known Member

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    careful with the soldier heat as u can melt the contact of the c/b easily
     
  9. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    That's why you get the wire glue from jaycar.
     
  10. Macca177

    Macca177 Member

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    exactly this, no heat, cleaned with a eraser and then applied the wire glue. 24 hrs too cure so it will go back in today and check its all working fine.
     
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  11. krusing

    krusing Well-Known Member

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    Correct, careful of the heat, ;)
    Remember to Solder, :D
    not to Smolder. :oops:
     
  12. Macca177

    Macca177 Member

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    Worked perfect, thanks for the wire glue tip - plus Jaycar was 1/3 of the price of everywhere else, Highly recommend keeping this in the tool box anyway!
     

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  13. krusing

    krusing Well-Known Member

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    Keep in mind, it not pure metallic, like solder is.
    And could cause resistance with the voltage supply to the globe, and it could heat up like a resistor and create heat on the CB.

    IMHO, I would not of use that.
     
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  14. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    If it was pulling 50w then I would say that could happen, don't see it happing on a 5w globe, very little draw to cause any resistance.
     
  15. krusing

    krusing Well-Known Member

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    I did say wet and dry sand paper,
    which is normally a very fine abrasive, and should be able to clean the surface up and not damage it.
     
  16. krusing

    krusing Well-Known Member

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    Sorry, I have to agree that I disagree with your comment, and I would not use it on any of my cars.
    It doesn't matter what current it draws, It is still a resistive material, and will cause heat to the back of the board, and that is how some car fires can start,
    It was fairly obvious what damage that 5 watt globe had done to the donut connection on the c/board, seeing the burn marks.

    Its not metallic like solder, which is tin & lead based,
    and is always used on C/Boards.
     
    Last edited: Mar 31, 2020
  17. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    It was flickering on off so yes it will have arc marks / burnt marks, here is some info.


    This Graphite-Filled Conductive Wire Glue is perfect for high-temperature operating conditions metals, conductive heat-resistant adhesive like ceramic and glass materials and also for heat conductive coating.

    • It's a single component, inorganic aluminosilicate material, in black.
    • The conductive material is graphite and the conductive performance quality is choiceness.
    • The temperature resistance is 500Ta C, under the protection of inert gas, it can be used at 1000Ta C.
     
    Last edited: Apr 1, 2020
  18. mechanic

    mechanic Active Member

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    WTF does any of that actually mean?
    Choiceness? Please tell me that is a cut/paste error.

    The temperature resistance is 500 degrees? I’m pretty sure the circuit board would be liquid at that temp.
     
  19. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    That's what the polymers glue temperature resistance range is.

    here you go,

    • Lead-Free and No Heating Involved
    • For both AC and DC low voltage circuits
    • Drying Time: To touch: 2 hours; Through: 12 to 48 hours (Depending upon temperature, relative humidity coating thickness, and substrate)
    • Density: 0.6 grams per cubic centimeter
    • Application Temperature Range: 40°F (4°C) to 110°F (43°C)
    • Service Temperature Range: 0°F (-17.8°C) to 180°F (82.2°C) constant; -20°F (-29°C ) to 200°F (93°C) intermittent
    • Conductivity: 13.16 Ohms per cubic centimeter
     

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