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How to repair the power adapter?

How to repair the power adapter?
Update Time:2019-05-14

The power adapter is broken. The first thing we check is to see where the problem occurs. If it is a line fault, we must focus on checking whether the input line and the output line are energized. If the line is damaged, it can be solved by replacing the power line.


Do you know how to repair the power adapter? The power adapter can also be called an external power supply, but most people do not know how to repair the power adapter. Today, Shenzhen Intermodal Electronics has popularized relevant knowledge for everyone:


The first thing we check is to see where the problem occurs. If it is a line fault, we must focus on checking whether the input line and output line are energized. If the line is damaged, it can be solved by replacing the power line.


If the fuse is burned out or blown up, check the rectifier bridge, each diode, the switch tube, and the large filter capacitor on 300 volts. This may cause the insurance to burn and blacken, or it may be caused by a problem with the anti-interference circuit.


In particular, it is important to note that the fuse is burnt due to the breakdown of the switch tube, and the power control chip and the current sense resistor are usually burned out. The thermistor is also easily burned out together with the insurance.


If it is a component problem, 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.


Observe the indicator light of the computer. If you plug in the power adapter, you can see that the charging indicator light is off and there is no time to go. The problem is that there is a problem with the power adapter interface in the notebook. Generally, the inner cable is broken, the circuit board is aging, and the welding is performed. Drop and other reasons. This is called a virtual welding phenomenon, which is only called a professional to repair.


Through the explanation of the above article, perhaps everyone is broken about the power adapter, how to fix this problem has a certain understanding, and then encounter such problems will not be caught off guard. Shenzhen Lianyunda Electronics Co., Ltd. produces high-quality power adapters, adopting imported new components, energy saving, environmental protection, stable and reliable, high work efficiency, and can be customized according to customer needs.

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