What are the methods for disassembling integrated circuits?

When repairing electronic circuits, it is often necessary to remove integrated circuits from PCB printed circuit boards. Since integrated circuits have many and densely packed pins, it is difficult to remove them, and sometimes the integrated circuits and circuit boards may be damaged. Here are several effective integrated circuit removal methods for your reference.

　　● Desoldering method using a desoldering device . Using a desoldering device to dismantle the integrated block is a common professional method. The tool used is an ordinary dual-purpose electric soldering iron with a power of more than 35W. When dismantling the integrated block, just place the heated dual-purpose electric soldering iron tip on the pin of the integrated block to be dismantled. After the solder at the soldering point melts and is sucked into the fine tin, the integrated block can be removed after all the solder on the pins has been sucked.

　　● Medical hollow needle disassembly method. Take a few medical hollow needles of size 8 to 12. When using, the inner diameter of the needle should just cover the pin of the integrated block. When disassembling, use a soldering iron to melt the solder of the pin, cover the pin with the needle in time, then remove the soldering iron and rotate the needle, and pull out the needle after the solder solidifies. In this way, the pin is completely separated from the printed circuit board. After all the pins are done in this way, the integrated block can be easily removed.

 　　● Electric soldering iron and brush disassembly method. This method is simple and easy to do, as long as you have an electric soldering iron and a small brush. When disassembling the integrated block, first heat the electric soldering iron, wait until the solder on the pin reaches the tin melting temperature to melt, and then use the brush to sweep away the melted solder. In this way, the pin of the integrated block can be separated from the printed circuit board. This method can be performed by foot or by column. Finally, use pointed tweezers or a small "one" screwdriver to pry off the integrated block.

　　●Add solder melting disassembly method. This method is a hassle-free method. Just add some solder to the pins of the integrated block to be disassembled (information source: http://www.dqjsw.com.cn) to connect the solder joints of each column of pins, which is conducive to heat transfer and easy to disassemble. When disassembling, use a soldering iron to heat each column of pins and pry them with pointed tweezers or a small "S" screwdriver. Heat the two columns of pins alternately until they are removed. Generally, each column of pins can be removed after heating twice.

　　●Multi-strand copper wire detinning disassembly method. It is to use multi-strand copper core plastic wire, remove the plastic outer skin, and use multi-strand copper core wire (short wire ends can be used). Before use, apply rosin alcohol solution to the multi-strand copper core wire, and after the electric soldering iron is heated, put the multi-strand copper core wire on the manifold pin to heat it, so that the tin solder on the pin will be absorbed by the copper wire, and the part that absorbs the solder can be cut off. Repeat several times to absorb all the solder on the pin. If conditions permit, you can also use the braided wire in the shielded wire. As long as the solder is absorbed, use tweezers or a small "one" screwdriver to gently pry it, and the manifold can be removed.

　　●Tinning method: Add solder to the pins of the integrated circuit. The solder wire should be of good quality. Heat it with an electric soldering iron and remove it directly with a sharp cone. This method is generally used by electronic factories for repairs. This method is the fastest to remove the integrated circuit.