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...
  • 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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          • 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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