01soldering pot
The first desoldering technique is quite brutal and can be used when you no longer keep the circuit board. The soldering pot is originally used for pre-tinning the pins of through-hole components, but it's also extremely efficient for removing components from a circuit board. Compared with other methods, using a soldering pot to remove components is really enjoyable.
Before placing the disassembled PCB in the soldering pot, applying some flux on the pad side can accelerate the melting of the pads (though it's not necessary). Hold the circuit board with tweezers in one hand and use pliers in the other hand to pull out the components one by one. In fact, sometimes after the circuit board is fully heated, flip it over and give it a gentle knock, the components on the circuit board will fall off one after another. Please note that in the picture above, it's safer to wear gloves to prevent your hands from getting burned. If necessary, please wear goggles to protect your eyes from the splashing solder.
If you don't have a soldering pot, you can also use a propane or butane blowtorch to heat the PCB. It would be great if you can use a wire mesh tripod for even heating, which can prevent the PCB from being smoked and charred by the intense flame.
What to do if the circuit board to be disassembled is too large? Don't hesitate,just use a hacksaw or cutting pliers to cut it before disassembling.
Since some smoke will be generated during the desoldering process, good ventilation can prevent you from inhaling too many harmful gases.
02 Soldering Sucker
The soldering sucker allows you to desolder components selectively. After heating the pins of the component with a soldering iron, use the soldering sucker to remove the solder from the solder holes, and then you can take out the component.
The larger the soldering sucker, the cleaner it can remove the solder from the pads of the component pins.
03 Desoldering Copper Mesh
What if the component pins are densely packed or if it's a surface-mounted device? You can use a special desoldering copper mesh. The copper mesh is woven from fine brass. Place it on the pad, apply a little flux, and then use a soldering iron to heat it. Belive me ,you can suck out the solder inside and outside the pad.
Sometimes, applying some solder on the pad in advance before using the copper mesh can speed up the process of the copper mesh absorbing the solder.
04 Special Desoldering Tools
This kind of desoldering tool actually combines a soldering sucker and a soldering iron into one. While heating the pad, the hollow heating head can suck out the solder from the solder holes through a vacuum pump. When there are tons of desoldering work, this tool is very efficient and helpful .
05 Hot Air Gun
The hot air gun is usually used to remove surface-mounted components from the circuit board. (Actually, it can also be used for soldering.) Aim it at the component to be disassembled and heat it. When the temperature of the circuit board pads exceeds the melting point of the solder, you can easily pick up the component with tweezers.
Using different nozzles of the hot air gun can avoid damaging the adjacent components when removing the components.
06 Desoldering Tweezers
To be honest, I haven't used this tool, but just by looking at its structure, you should know how to use it. For surface-mounted resistors, capacitors, and other components on the circuit board, it can heat and desolder at the same time. It should be very convenient for removing a large number of surface-mounted components.
Of course, for a small number of components, it's also very easy to remove them with a chisel-tip soldering iron.
07 Desoldering Heating Plate
Compared with the soldering pot, the following heating plate can also heat the circuit board evenly to a high temperature. At this time, with the help of tweezers, a hot air gun, or a soldering iron, you can desolder or solder components on the circuit board.
08 Compressed Air Bottle
Before trying this method in an experiment, you need to make sure you wear goggles. First, use a soldering iron to heat the connection between the component and the circuit board until the solder melts, and then use a bottled compressed air to blow the component off. This method is rather rough. Unless you really don't want the circuit board anymore, it will blow the solder on the PCB anywhere.
In fact, you can easily desolder components on the circuit board with a soldering iron.Many vedios shows the process of desoldering circuit components using appropriate chisel tips, horse hoof-shaped tips, and special desoldering iron tips.
As the old saying goes, things that have been divided for a long time will surely come together, and those that have been together for a long time will surely be divided. Soldering and desoldering are essential skills in the process of circuit board debugging and production.Every expert has their own unique skills,do you have any other ways to remove components from the circuit board?
