First, if there is a problem with the original adapter and it cannot be repaired or it is too late to repair, you can replace it with another adapter first, as long as the output voltage and power are roughly the same. There is also a voltage stabilizing circuit inside the notebook computer, so don't worry too much about the mismatch of the output voltage. When it comes to maintenance, the first step you need to do is to prepare the tools. We need multimeters, screwdrivers, welding tools.
Second, there are four plastic caps on the power adapter. Try not to damage the adapter shell. After the shell is damaged, there will be problems such as strengthening of electromagnetic radiation, which will affect the stability of the machine. If the casing is damaged, try to repair it. If the external power supply does not supply power during the disassembly process, you can try plugging in the battery at this time. If the machine can start normally, there may be a problem with the power cord or the adapter. After opening the appearance and opening the shielding layer, it is best to check the solder feet first, and observe with the naked eye. The circuit is intermittent, generally poor contact. Then test with a multimeter to find out if there is a problem with the power cord to simplify maintenance.
Third, during the test, if the resistance pin is found to be soldered, then use a welding tool to repair it, re-install the power adapter, start the test, and the problem is solved. It should be noted that if there is a problem with a certain capacitor during the detection process, you can buy a capacitor with the same model and capacity (the price is about 5 yuan), then solder the problematic capacitor down and solder the new capacitor on. That's it. If you find a problem with the IC power chip, you can solve it in the same way. Of course, because the IC chip is definitely one of the most important electronic components in the power adapter, the capacitor is too complicated.
Fourth, during the maintenance process of the optional power adapter, since the current power adapter has adopted a large number of SMD components, once the component fails, the maintenance is even more difficult. The power of the power adapter is also increasing day by day, which puts more and more challenges on the electronic components. If the quality of the electronic components used in the power adapter is not good enough and the PCB wiring is improper, it is likely to increase the probability of failure. Therefore, buying a good quality power adapter is very helpful for the stability of the notebook.
Fifth, check whether there is any problem with the capacitor, resistance and inductance. If the capacitor is bulging, it is best to replace it in time to avoid hidden dangers.
The above are the five steps of power adapter maintenance. Through these five steps, we can check the power adapter well. Of course, if there is no major problem, it is best not to open the shell easily. If necessary, it is recommended to find a professional for better security.
