Main products: power adapter, medical power, LED power, charger and so on.
Shenzhen Lianyunda Electronics Co., Ltd. is committed to doing a good job in power supply products, and sincerely welcomes customers to contact us by phone or email.
Five steps to repair the power adapter:
1. If there is a problem with the original adapter, it can't be repaired or it can't be repaired, you can use other adapters instead, as long as the output voltage and power are roughly equal. There is also a voltage regulator circuit inside the laptop, don't worry too much about the output voltage mismatch. In the repair, the first step is to prepare the tool. We need a multimeter, a screwdriver, and a welding tool.
2. There are four plastic caps on the power adapter. Do not damage the adapter shell as much as possible. After the shell is damaged, electromagnetic radiation will be strengthened and the machine will be stable. If the shell is damaged, try to fix it. During the disassembly process, if the external power supply is not powered, you can try plugging in the battery. If the machine can start normally, there may be a problem with the power cord or the adapter. Open the appearance, open the shielding layer, it is best to first check the soldering feet, the naked eye can be observed, the circuit is intermittent, generally poor contact. Then use a multimeter to check if there is any problem with the power cord to simplify the maintenance.
3. During the test, if the resistance pin is found to be soldered, and then soldered with a soldering tool, install the power adapter again, 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 purchase a capacitor with a model and capacity (price is about 5 yuan), then solder the defective capacitor and solder the new capacitor. Just fine. If you find that there is a problem with the IC power chip, you can solve it in the same way. Of course, since the IC chip is definitely one of the most important electronic components in the power adapter, the capacitor is too complicated.
4. Optional power adapter During the repair process, since the current power adapter has already used a large number of patch components, once the component has a problem, the maintenance is more difficult. The power of the power adapter is also increasing day by day, so that the test of electronic components is getting bigger and bigger. If the quality of the electronic components used in the power adapter is not good and the PCB is improperly wired, it is likely to increase the probability of failure. Therefore, the purchase of a good quality power adapter is very helpful for the stability of the notebook.
5. Check the capacitor resistance and inductance for any problem. If the capacitor has a bulge, it is best to replace it in time to avoid potential hazards.
The above is the five major steps of power adapter repair. Through these five steps, you can check the power adapter well. Of course, if there are no big problems, it is best not to open the case easily. If you need it, it is better to find a professional and better.