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Tech Helproom


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desoldering problem


john12

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Hi and thanks for reading this post.

I have a bad capacitor on a motherboard and in order to change it i purchased a reel of desoldering wick from ebay, just a generic brand from china.

After applying onto the joint and plenty of heat the wick would not draw up any of the solder, then i used a large blob of solder paste which helps the solder to melt more easily, but nothing.

I was advised that "Goot" is a good brand of desoldering wick so back i went on ebay, when the stuff arrived it was useless.

Has anyone actually purchased desoldering wick which works first time without any of all this hassle i am experiencing, where is a reliable source which will deliver what they advertise and not rip me off.

Many thanks in advance. John.

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Ian in Northampton

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Could there be an issue with leaded and non-leaded (RoHS) solder here? I'm no expert with a soldering iron...

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woodchip

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you need flux on the braid if its not sticking to it, or it may be old tarnished braid that needs throwing way

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john12

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Hi. Thanks for the replies.

Can the wick get the solder completely out of the hole or does it just remove the surface solder.

Many Thanks. John.

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wee eddie

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I don't think that you can easily clear a small (wire sized) hole on a printed Circuit Board; the Surface Tension, of the liquid Solder, is too great but you should be able to see the hole clearly.

You may succeed after repeated attempts.

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woodchip

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that's why you buy small drill bits from maplins to clear the holes, you can use them with your fingers to clear holes that still have solder in them, but a cocktail stick wood one should do the same job if solder is hot when you probe the hole

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