When the circuit board is damaged and needs to be repaired, we have to dismantle the damaged components, including when we detect the components, we also need to dismantle them. So, how to maintain and dismantle the components on the PCB board? Today, I'd like to share with you the method of dismantling components of PCB board
Components soldered on PCB board
& nbsp;& nbsp;& nbsp;& nbsp; When you don't know which component is damaged or which component causes the abnormality, you can solder the components without affecting the normal operation of the circuit board, and then observe whether the abnormality of the circuit board is eliminated. This method is not suitable for the disassembly of the necessary components, such as circuit protection components, which may burn the motherboard accidentally< br data-filtered="filtered" />
& nbsp;& nbsp;& nbsp;& nbsp; The components welded on the PCB board are mainly divided into single leg, double leg, three leg and multi leg, and the disassembly methods are also different.
Desoldering of three pins: desoldering the two adjacent pins at the same time
& nbsp;& nbsp;& nbsp;& nbsp; It's easy to disassemble the single leg components, which can be disassembled by direct desoldering or heating. For the convenience of disassembly, the pin can be removed by shaking. The premise of using this method is that the component can not be used.
Use the hollow cup to slowly solder off the multi pin components < br data filtered = "filtered" / >
Using copper plate to heat and desolder pins at the same time
& nbsp;& nbsp;& nbsp;& nbsp; For components with three pins, it is necessary to solder two pins first, and then remove the components by shaking left and right in the same way as operating double pins< br data-filtered="filtered" />
& nbsp;& nbsp;& nbsp;& nbsp; It's troublesome to disassemble the components of pin IC chip. The components can be soldered off one by one through the hollow cup and then removed.
Pin image after BGA scanning
A component whose pins are soldered to the front of the circuit board
For the components whose pins do not pass through PCB holes, the tin pump can be used directly.
