How to solder in CPU VRM area?

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  • Stefan Payne
    Badcaps Legend
    • Dec 2009
    • 1267
    • Germany
    #1

    How to solder in CPU VRM area?

    Well, yeah, how do you solder in that area?!

    I have the LF-8800 (de)soldering station but I'm somehow unable to desolder an unused cap space (get rid of the solder in those holes).

    Desoldering caps works somehow, not great but I can live with that result...

    Is there anything I can do to get rid of that solder in that hole?

    I also tried some (rather cheap I think) solderwick - not much luck with that either...
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30901
      • Albion
      #2
      Re: How to solder in CPU VRM area?

      heat the other side with hot air or an iron.

        Comment

        • clearchris
          Badcaps Veteran
          • Dec 2013
          • 686
          • United States
          #3
          Re: How to solder in CPU VRM area?

          Add some 63/37 pb solder to lower the melting point of the lead free solder.

            Comment

            • Stefan Payne
              Badcaps Legend
              • Dec 2009
              • 1267
              • Germany
              #4
              Re: How to solder in CPU VRM area?

              Thanks stj, will try that next time...

              @clearchris
              I only have PbSn40 here
              And SN60PbCu2/zh

              But that board was pre RoHS anyway

                Comment

                • Behemot
                  Badcaps Legend
                  • Dec 2009
                  • 4845
                  • CZ
                  #5
                  Re: How to solder in CPU VRM area?

                  I use ordinary transformer solder iron and dental explorer. This or similar
                  Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

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                    Comment

                    • clearchris
                      Badcaps Veteran
                      • Dec 2013
                      • 686
                      • United States
                      #6
                      Re: How to solder in CPU VRM area?

                      Originally posted by Stefan Payne
                      Thanks stj, will try that next time...

                      @clearchris
                      I only have PbSn40 here
                      And SN60PbCu2/zh

                      But that board was pre RoHS anyway
                      Yeah, any Pb solder will lower the melting point of lead free solder. 63/47 just has the lowest melting point of the pb/sn solders.

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