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How to repair the laptop power adapter failure?

source:power adapter     Popular:adapter     release time:2021-07-16 11:16:52     Article author:sznbone    

  Nowadays, notebooks are a very common office equipment for everyone, but no matter what brand of notebooks, they need to be battery-powered when in use, so the power adapter is an indispensable component, so the power adapter is The notebook plays a key role in the use of the notebook. What if the device suddenly fails? Today, let Xinjukang Technology give you a detailed analysis:

  Power Adapter

  Check the indicator light of the power adapter. If the indicator light is on, it is generally considered that there is no problem from the power supply to the adapter, and it must be ensured that the indicator light itself is not broken.

How to repair the laptop power adapter failure?(图1)

  If there is a problem with the original adapter that cannot be repaired or is too late to repair, you can use another adapter to replace it first, as long as the output voltage and power are roughly equivalent. There is a voltage regulator circuit inside the notebook, so don't worry too much about the output voltage mismatch. When repairing, the first step is to prepare tools. We need a multimeter, a screwdriver, and welding tools.

  Check whether there is electricity between the power adapter and the computer. This can be displayed by the indicator light of the notebook. When the notebook is charged with power, the charging indicator light will be on. Otherwise, it will not light up. Or find a power adapter of the same brand to try. Use your power adapter to hold the other party’s laptop. If the other party’s computer is working properly, your power adapter is fine. Otherwise, there may be a problem with your power adapter. If the other party’s power adapter is plugged into your computer and your computer works normally, but your own power adapter does not work, then your power adapter has a problem.

  There are four plastic caps on the power adapter. Do not damage the adapter shell as much as possible. After the shell is damaged, problems such as enhanced electromagnetic radiation will occur, which will affect the stability of the machine. If the shell is damaged, try to repair it. If the external power supply does not supply power during the disassembly process, you can plug in the battery and try. If the machine can start normally, there may be a problem with the power cord or adapter. After opening the appearance and opening the shielding layer, it is best to check the solder feet first, which can be observed with the naked eye. Then check with a multimeter to find out whether there is a problem with the power cord to simplify maintenance.

  Observe the change of the indicator light of the computer. If you plug in the power adapter, you can see that the charging indicator turns on and off, and it stays on for a while, then there is a problem with the power adapter interface in the notebook. Generally, the internal cable may be broken, the circuit board is aging, and soldering. Causes such as falling. This is called a virtual welding phenomenon. This situation can only be repaired by an expert.

  Power Adapter

  During the test, if it is found that the resistance pin is soldered, then use a welding tool to repair it, install the power adapter again, start the test, and the problem is solved. It should be noted that if you encounter a problem with a certain capacitor during the inspection process, you can purchase a capacitor with the same model and capacity, then solder the problematic capacitor and solder the new capacitor on. 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 capacitance is too complicated.

  The above is a detailed analysis of the relevant knowledge of power adapter failure maintenance, if you want to know


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