source:Industry News Popular:adapter release time:2022-02-17 09:59:34 Article author:sznbone
First of all, we have to check where the problem is, if it is a line failure: including the power cord is damaged and not energized, the contact port is oxidized and the contact is poor. Focus on checking whether the input line and output line are energized. If the line is faulty, it can be solved by replacing the power cord.
If the insurance is burned out or blown up, mainly check the rectifier bridge, the diodes, the switch tube, and the large filter capacitor on 300 volts. It may cause the insurance to burn and turn black, or it may be caused by a problem with the anti-interference circuit. Special attention should be paid to the fact that the fuse is burnt due to the breakdown of the switch tube, which usually burns the power control chip and the current detection resistor. The thermistor is also easy to burn out along with the insurance.
If it is a component problem, since the current power adapter has adopted a large number of SMD components, once the component has a problem, the maintenance is even more difficult. The power of the power adapter is also increasing day by day, so that the test of electronic components is getting greater and greater. 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.
Observe the change of the computer’s indicator light: if you plug in the power adapter, you can see that the charging indicator light turns on and off for a while, and it stays on for a while, there is a problem with the power adapter interface in the notebook. Generally, the line inside may be broken. , The circuit board is aging, soldering drops and other reasons. This is called a virtual welding phenomenon. This situation can only be called professional personnel repair.
These are the working principle and maintenance steps of the power adapter. Friends in need can still learn more about the power adapter. If you encounter a malfunction or problem in the future, you can quickly troubleshoot and solve it yourself.
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