How to Desolder Circuitry
Solder is a metal alloy used to connect electrical components to circuit boards. Its role is to help keep the components permanently connected. It also prevents them from moving as they are carried from one location to another. It is sometimes necessary to desolder circuits instead. This may be due to bad connections or component replacement. Or a user may wish to reuse the components from an old circuit board.
To desolder circuitry, use a low wattage soldering iron of 40 watts or less. Remove the solder with a braid, pump or small tool.
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Things You'll Need
- Low wattage soldering iron
- Soldering braid (optional)
- Soldering pump (optional)
- Desoldering bulb (optional)
- Desoldering brush, scraper or probe
Instructions
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1
Locate the solder joints you wish to remove. Make sure the area is clean and dry. The soldering iron must also be clean and dry.
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2
Turn the soldering iron on and hold it against the joint until the solder begins melting. Hold the clean portions of the copper braid against the joint. The solder will move onto the braid. Remove the soldering iron. You may need to repeat the procedure, or you can try the methods in Step 3 or 4.
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3
Use a soldering pump or bulb to help desolder. Press the plunger against one side of the joint. If you are using a bulb, place it against the joint and squeeze it. Hold the soldering iron briefly against the other side. Release the plunger or depress the bulb and suck the melted solder up. Repeat the heating and removal procedure as often as needed.
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4
Heat the solder joint carefully with the soldering iron. When the solder is melted, use a brush or probe to gently scrape it away. Repeat the process as needed.
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5
Use your fingers to gently remove the component from the circuit when it is loose enough. Do not force it; use a probe or small screwdriver to pry the leads if necessary.
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1
Tips & Warnings
Use a heat sink for delicate components. If you do not have one, use an alligator clip.
The soldering iron, solder and components get very hot. Handle carefully or you could burn yourself or start a fire.
Do not hold the soldering iron for too long against the joint. The component may become too hot and be destroyed.
Solder is made from chemicals that should not be ingested. Always wash your hands after working with it.
References
Resources
- Photo Credit soldering woodburning kit image by Steve Johnson from Fotolia.com
