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In electronics, desoldering is the removal of solder and components from a circuit board for troubleshooting, repair, replacement, and salvage.
A desoldering pump, colloquially known as a solder sucker, is a manually-operated device which is used to remove solder from a printed circuit board. There are two types: the plunger style and bulb style. (An electrically-operated pump for this purpose would usually be called a vacuum pump.)
The plunger type has a cylinder with a spring-loaded piston
which is pushed down and locks into place. When triggered by pressing a
button, the piston springs up, creating suction that sucks the solder
off the soldered connection. The bulb type creates suction by squeezing
and releasing a rubber bulb.
The pump is applied to a heated solder connection, then operated to suck the solder away.
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