In the process of PCB copy, it is necessary to disassemble the circuit board, remove the integrated circuits and other components to make the BOM list, and scan and copy the PCB bare board, therefore, in this process, the correct disassembly of the integrated circuits on the PCB board is also an important issue.
Not only in the PCB copy process, is in the circuit repair, often need to remove the integrated circuit from the printed circuit board, and because of the integrated circuit pins are many and dense, disassembly is very difficult, and sometimes damage to the integrated circuit and the circuit board. Here, we provide several accurate disassembly of the integrated circuit proven methods, I hope it will help you.
Solder suction tin demolition method: the use of solder suction demolition integrated block, which is a common professional method, the use of tools for ordinary suction, soldering soldering iron, power in 35W or more. When disassembling the integrated block, as long as the heated dual-use soldering iron head on the pins of the integrated block to be disassembled, to be melted solder joint tin is sucked into the fine tin ware, all the pins of the solder sucked after the integrated block can be taken off.
Soldering iron brush with disassembly method: the method is simple and easy, as long as there is a soldering iron and a small brush can be. When disassembling the integrated block, the soldering iron is heated and the solder on the pins is melted after reaching the melting temperature, and the brush is used to sweep off the melted solder. In this way, the pins of the integrated block can be separated from the printed board. This method can be carried out in separate pins or separately. Finally, use pointed tweezers or a small “a” screwdriver to pry off the integrated block.
Medical hollow needle removal method: take a few medical 8 to 12 hollow needles. When using the needle’s inner warp just cover the integration block pins is appropriate. When disassembled with a soldering iron to dissolve the pin solder, in time to cover the pin with a needle, and then remove the iron and rotate the needle, wait for the solder to solidify and then pull out the needle. This way the pin is completely separated from the printed board. After all the pins are done once, the integrated block can be easily removed.
Increase the solder melting disassembly method: This method is a hassle-free method, just add some more solder to the pins of the integrated block to be disassembled, so that the solder joints of each column of pins are connected, so as to facilitate heat transfer and easy disassembly. Disassembly with a soldering iron each heated column of pins with pointed tweezers or small “a” screwdriver to pry a pry, two columns of pins are heated in turn, until removed. In general, each column of pins heated twice can be removed.
Multi-strand copper wire suction tin demolition method: is the use of multi-strand copper core plastic wire, remove the plastic skin, the use of multi-strand copper core wire (can use short wire head). Before using the multi-stranded copper core wire on the rosin alcohol solution, to be hot soldering iron will be multi-stranded copper core wire into the integrated block pins heated, so that the tin solder on the pins will be adsorbed by the copper wire, suck on the part of the solder can be cut off, repeated several times on the pins of the solder can all be sucked away. Conditions can also use the braided wire inside the shield. As long as the solder sucked, with tweezers or a small “a” screwdriver gently pry, the integrated block can be removed
