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How to salvage SMD component from old electronics board Answered

I want to know how to perfectly desolder a smd Component. I  want to reuse them but cant get them i would love suggestion or advice

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Downunder35m
Downunder35m

5 years ago

I worked in the SMD field for a few years building sensors and prototypes.
If you glued on there are various methods to get clean parts back for later use.
First of all you need the right tools, either a SMD vacuum part holder or at least some needle point tweezers.
Next you will need a SMD soldering iron (basically a pair of pliers with soldering tips at the end) and a hot air solder station with various nozzles.
That was to get the parts off, the get the remaining solder of them you need some cleaning tool.
We used fine copper braided bands, similar to what is used to desolder on a hotplate.
The part was dunked into resin flux and pushed onto the heated copper braid, a short burst of hot air and the solder goes from the part into the braid.
You can do it with a clean soldering iron and flux as well but for more than a handful of parts it is far too time consuming.
Do yourself a favour and cover your workarea with some fine cloth in a nice color - it helps immense to find parts that popped out of your tweetzers.

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caitlinsdad
caitlinsdad

5 years ago

That is usually done with a rework soldering tool which uses a fine stream of hot air to heat up the part. Those tiny parts are usually soldered by having a tiny bit of solder paste printed on the circuit board and the whole thing is placed in an oven to heat the solder. And hobbyists have adapted the process by using everything from hot air heat guns to toaster ovens to frying pans and warming plates. Look up "reflow" soldering. Good luck.