In the process of PCB copy board, it is also an important subject to remove the integrated circuit on the PCB copy board because the circuit board needs to be split, the integrated circuit and other components need to be removed to make BOM list, and the bare PCB board from which the split is to be scanned and copied.
Not only in the PCB board copy process, is in the circuit maintenance, often need to remove the integrated circuit from the printed circuit board, and because the IC pins are more and more dense, it is difficult to disassemble, sometimes will damage the integrated circuit and circuit board. Here, we provide several accurate disassembly integrated circuit effective methods, hope to help you.
Tin suction disassembly method: The use of tin suction device disassembly integrated block, this is a common professional method, the use of tools for ordinary suction and welding dual-purpose electric iron, the power is more than 35W. When removing the integrated block, just place the heated dual-purpose electric soldering iron head on the pin of the integrated block to be removed. After the solder joint is melted and sucked into the fine tin, the integrated block can be removed after the solder of all the pins are sucked.
Medical hollow needle disassembly method: take medical 8 to 12 hollow needle several. When used, it is appropriate that the inner meridian of the needle just covers the pin of the integrated block. When disassembling, melt the pin solder with the soldering iron, 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. This allows the pin to be completely separated from the printed board. Once all the pins have been done this way, the block can be easily removed.
Electric iron brush with disassembly method: This method is simple and easy, as long as there is a electric iron and a small brush. When disassembling the integrated block, heat the electric iron first. After melting the solder on the pin at the temperature of dissolving tin, sweep away the melted solder with a brush while using the machine. This separates the pin of the block from the printed board. The method can be carried out separately or separately. Finally, pry off the block with pointed tweezers or a small "one" flathead screwdriver.
Add solder melting disassembly method: This method is a convenient method, as long as to add some solder to the pin of the integrated block to be disassembled, so as to connect the solder joints of each column of pins, so as to facilitate heat transfer and easy disassembly. When disassembling, each row of pins heated by electric iron should be pry with pointed tweezers or small "one" flat-head screwdriver. The two rows of pins should be heated alternately until removed. In general, each column of pins can be removed by heating twice.
Multi-strand copper wire tin removal method: is the use of multi-strand copper core plastic wire, removal of PCB circuit board plastic skin, the use of multi-strand copper core wire (can use short wire). Before use, put the rosin alcohol solution on the multiple strands of copper core wire. After the electric soldering iron is heated, put the multiple strands of copper core wire on the integrated block pin for heating, so that the tin welding on the pin will be absorbed by the copper wire, and the part that absorbs the solder can be cut off. Repeat several times and all the solder on the pin can be sucked away. Braided wire in shielded wire can also be used if possible. As long as the solder is sucked up, gently pry with tweezers or a small "one" screwdriver, the integrated block can be removed.