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Desoldering a capacitor without frying the motherboard.

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ThePixel Posted messages 236 Status Member -  
Jojolaguitare Posted messages 12012 Registration date   Status Member Last intervention   -
Hello, is there a technique to unsolder a capacitor without frying the motherboard? Because I've already tried to replace a capacitor but it's impossible; every time I do, I fry the motherboard...

Thanks in advance for your answers.

1 answer

  1.
    kardegil Posted messages 2070 Registration date   Status Member Last intervention   307
     
    Hello,

    Impossible, you don’t damage the motherboard by desoldering a capacitor. I've done it time and time again, and I've never had a problem.
    You desolder a capacitor because it's bulging or possibly to check it.
    With a proper soldering iron, a solder sucker or braid, and some attention, it can be done.

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    Please make sure to describe your problem well.
    5
    1. epango Posted messages 36739 Registration date   Status Member Last intervention   4 271
       
      You are too categorical. It is possible as long as you have the necessary know-how and the essential equipment.
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      1. kardegil Posted messages 2070 Registration date   Status Member Last intervention   307 > epango Posted messages 36739 Registration date   Status Member Last intervention  
         
        Hi epango,
        It's true, I’ll give you that.
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    2. ThePixel Posted messages 236 Status Member 12
       
      In fact, each time I desolder a capacitor, the solder burns the motherboard due to the heat.
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      1. Jojolaguitare Posted messages 12012 Registration date   Status Member Last intervention   2 783 > ThePixel Posted messages 236 Status Member
         
        Hello.

        You shouldn't spend a quarter of an hour on soldering either! When the soldering iron reaches its temperature (280°C for a 30-watt iron), the solder joint is made in 2-3 seconds. But before desoldering anything, you need to completely discharge the current flowing on the motherboard because capacitors are more or less like batteries.
        Now I strongly agree with epango >>> It's possible provided you have the necessary know-how <<< Changing a capacitor is fine, but isn't the fault upstream? Moreover, without an oscilloscope to help you, you will really struggle to find a fault.

        This is just my opinion... Bye
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