Solders can be removed using a vacuum plunger (on the right) and a soldering iron.

In electronics, desoldering is the removal of solder and components from a circuit for troubleshooting, repair purposes and to use the components in their own projects .Electronic components are often mounted on a circuit board and it is usually desirable to avoid damaging the circuit board, surrounding components, and the component being removed. Image File history File links Size of this preview: 800 × 600 pixelsFull resolution (1600 × 1200 pixel, file size: 298 KB, MIME type: image/jpeg) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Desoldering User:Mysid/otherimages ... Image File history File links Size of this preview: 800 × 600 pixelsFull resolution (1600 × 1200 pixel, file size: 298 KB, MIME type: image/jpeg) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Desoldering User:Mysid/otherimages ... Using a soldering iron. ... // Electronics is the study of electron mechanics. ... A solder is a fusible metal alloy, with a melting point or melting range below 450 °C (840 °F), which is melted to join metallic surfaces, especially in the fields of electronics and plumbing, in a process called soldering. ... This article or section does not adequately cite its references or sources. ... Troubleshooting is a form of problem solving. ... Close-up photo of one side of a motherboard PCB, showing conductive traces, vias and solder points for through-hole components on the opposite side. ...

Specialized tools, materials, and techniques have been devised to aid in the desoldering process.

Desoldering tools and materials include:

• Desoldering braids
• Heat guns
• Vacuum plungers (solder suckers)
• Removal alloys
• Removal fluxes
• Vacuum and pressure pumps with specialized heater tips and nozzles

Heat Gun Kit A heat gun is a device used to emit a stream of hot air. ...

Quad Flat Packs (QFP)

QFP chips have thin leads closely packed together protruding from the four corners of the integrated circuit (IC); usually a square IC. Removal of these chips can be problematic. It is impossible to heat all of the leads at once with a standard soldering iron. It is possible to remove them with the use of a razor blade or a high-rpm craft tool,simply by cutting off the leads. This technique however, can lead to the destruction of the IC. The stubs are then easy to melt off and clean with a soldering iron. Another method is to use a heat gun or pencil butane torch and heat up a corner, and gently pry it off, working the torch down the leads. This method often leads to traces getting lifted off the PCB where a lead did not get heated enough to cause the solder to flow. The easiest way to remove one of these devices is to use Field's metal. Take some of the Field's metal wire, and solder it into all the leads of the chip. Fields metal melts at around 140ºF (62ºC) — less than water's boiling point. Once it's applied to all the leads, it stays molten, and you can simply lift the chip off the board and finish your clean up work. This has the advantage of not damaging the PCB or the IC. Integrated circuit showing memory blocks, logic and input/output pads around the periphery Microchips with a transparent window showing the integrated circuit inside. ... Fields metal, or Fields alloy, is a fusible alloy that becomes liquid at approximately 62 °C (144 °F). ...