Desoldering Chips, was Re: Can someone, > confirm this chip equivalence?
cclist at sydex.com
Thu Apr 8 11:49:52 CDT 2010
On 8 Apr 2010 at 9:00, Diane Bruce wrote:
> That can cut your via. Safer to use a sewing machine needle or pin.
> Heat the solder until it is molten, clean with needle/pin as the
> solder tends not to stick to the steel. In a pinch, the end of a
> capacitor/resistor lead will do if you are careful.
If you can--often, the problematic pin is in a via between two large
lands and it's simply not possible to apply sufficient heat without
damaging things. I do have a sharpened stainless-steel pick that
will sometimes work (solder won't stick to stainless), but sometimes
you just have to drill. Using a needle or a component lead in this
case merely conducts more heat away from the area.
Another approach is to use Wood's metal (e.g. Chip-Quick) to lower
the melting point of the solder. I use that on SMT boards quite a
bit with excellent results, but it also works for through-hole
boards. Yes, it contains heavy metals which can be toxic, but it's in
metallic form (remember all of the shiny cad-plated hardware of a few
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