SMD fuse soldering advice please

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  • Ady2017
    Senior Member
    • Dec 2017
    • 55
    • UK

    #1

    SMD fuse soldering advice please

    Hi all. I need to replace an SMD fuse on my camcorder and this is the first time I have had to do any SMD soldering so your advice would be appreciated. Below is a picture of the board that I am working on and I have highlighted the fuse that needs to be replaced. I managed to zoom in to take this picture but the fuse is really tiny and is sandwiched between other components so this is going to be a new milestone for me. I appreciate that I am going to have to buy a new soldering iron if you could advice on what I need please. I was thinking about putting a big soldering iron across the whole thing so I could heat up both sides in one go but don't know if this is the correct way of going about it? Thank you.

  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 31267
    • Albion

    #2
    F1,2 and 3 look like they are in parallel so if F3 meters open F2 will be the same.
    to remove it put some solder on both ends and heat it from the center so both ends melt - then slide it off the pads

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    • Ady2017
      Senior Member
      • Dec 2017
      • 55
      • UK

      #3
      Thanks for the reply. The photo I posted doesn't accurately show the problem as it is zoomed in. Please see the photo below which shows the board compared to a conventional soldering iron and a 1p coin. I can barely see the fuse without a magnifying glass. Are there soldering irons that have tips the size of a needle to be able to get to this thing or do I need a soldering station or hot air gun instead? Probably basic questions but I am just getting started with SMD stuff.

      Also, the old fuse was 1.4A 32V but the closest replacement that I can find is 1.5A 32V. I assume it will be ok to make this 0.1A jump in fuse size?



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      • harp
        Badcaps Veteran
        • Jun 2022
        • 645
        • Planet Earth

        #4
        You have a soldering iron with screw on side... it is nice oportunity to try a make some precision tip from thick copper wire. Desoldering smd like your see on https://m.youtube.com/watch?v=s1MY5d...cJCQMKAYcqIYzv at 17:40, followed by making fine tip... https://www.perforum.info/forum/vjes...d46d9fd01434e7 ... fuse will be ok, but check if something else in path is not fail.

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        • Ady2017
          Senior Member
          • Dec 2017
          • 55
          • UK

          #5
          Thanks for your reply. This afternoon I have just got my hands on a used smaller soldering iron that can accept interchangeable bits that go all the way down to about 0.1mm so now it is time to learn and practice on an old router PCB. I am a great believer in learning the skills before spending lots of money and this is perfect for me but I do need to get a freestanding magnifier soon.

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          • stj
            Great Sage 齊天大聖
            • Dec 2009
            • 31267
            • Albion

            #6
            i need a drink after seeing that "soldering" iron!!

            Comment

            • Ady2017
              Senior Member
              • Dec 2017
              • 55
              • UK

              #7
              That is the actual soldering iron that Noah used when he built the arc. It is a piece of our heritage my friend.

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