Desoldering...

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  • start2011
    Member
    • Dec 2011
    • 30
    #1

    Desoldering...

    Hi, anybody has done this. I have X-Main Board from Toshiba Plasma 42HP66. I tried to take a large IC from the board but it was hard to desolder I used Weller WES51 https://www.badcaps.net/forum/attach...7095611Station. What soldering station you use?. Thanks
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    • cmj21973
      Badcaps Veteran
      • Feb 2010
      • 267
      • USA
      #2
      Re: Desoldering...

      Is it under this heatsink or is it attached to this heatsink?

      From the looks of the solder, I'd it lead-free solder correct?

      I apply some RadioShack rosin soldering flux non-spill paste. Apply some 60/40 solder to each joint, so the two solders mix and will be easier to remove.

      I use either a RadioShack desoldering iron or desoldering braid.

      If the heatsink can't be removed you'll have to heat it up with a hairdryer or heat gun.

      Use care and be careful with the heatgun!
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        • start2011
          Member
          • Dec 2011
          • 30
          #3
          Re: Desoldering...

          [QUOTE=cmj21973;210857]Is it under this heatsink or is it attached to this heatsink?

          From the looks of the solder, I'd it lead-free solder correct?

          I apply some RadioShack rosin soldering flux non-spill paste. Apply some 60/40 solder to each joint, so the two solders mix and will be easier to remove.

          I use either a RadioShack desoldering iron or desoldering braid.

          If the heatsink can't be removed you'll have to heat it up with a hairdryer or heat gun.

          Use care and be careful with the heatgun![/QUO

          Ok, I`ll try to apply some rosin soldering flux non-spill paste. I have not done this yet. I tried to use Chip Quick, it did`nt help. heatsink should be ok to take it off from the IC.

            Comment

            • cmj21973
              Badcaps Veteran
              • Feb 2010
              • 267
              • USA
              #4
              Re: Desoldering...

              Chip Quick is used for SMD removal.

              It should make the solder stay molten for a while. Long enough to sucker up the solder or to pull the part off the PCB.

              The solder joints that are circled, in the second picture, are under the heatsink?

              http://www.bing.com/videos/search?q=...st=0&FORM=LKVR

                Comment

                • start2011
                  Member
                  • Dec 2011
                  • 30
                  #5
                  Re: Desoldering...

                  Yes, the second picture. 32 pins IC.

                    Comment

                    • bbjunkie
                      Badcaps Veteran
                      • Dec 2011
                      • 301
                      #6
                      Re: Desoldering...

                      I am having the exact same problem removing one of these hybrids on an LG board.

                      I have been told that preheating the board to 120c in an oven before beginning the desoldering process is the way forward with this repair, I haven't had time to do this yet and wouldn't like to recommend it without trying it first.

                      Jim

                        Comment

                        • cmj21973
                          Badcaps Veteran
                          • Feb 2010
                          • 267
                          • USA
                          #7
                          Re: Desoldering...

                          You would have to pull all of the electrolytic caps to heating it in an oven, or replace them all when they vent in your oven. Would also have to remove anyhthing else that would melt at 120c.

                          Seeing as the chip is a throughhole component, I'd still recommend soldering iron & desolder braid or a desoldering iron.

                            Comment

                            • ratdude747
                              Black Sheep
                              • Nov 2008
                              • 17136
                              • USA
                              #8
                              Re: Desoldering...

                              or the needle trick... that is, if you can find a SS dentist pick.
                              sigpic

                              (Insert witty quote here)

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