The power adapter is broken how to repair the 2020-191
27 16:56:01 power adapter is a small portable electronic devices and electronic power supply power transformation equipment, generally composed of shell, power supply transformer and rectifier circuit, according to the input type can be divided into the ac power adapter and the dc power adapter.
According to the connection mode can be divided into the plug wall power adapter and desktop type power adapter.
Used in telephone composite aircraft, game consoles, the language repeater, walkman, notebook computers, cellular phones and other devices.
The following people learn about the power supply device to how to service!
The power adapter is broken how to repair 1.
If there is something wrong with the original adapter, unable to repair or too late, we can use other adapter to replace, as long as the same output voltage and power can be.
Notebook power adapter and internal voltage regulator circuit with a, don't worry too much about the output voltage does not match.
And in the maintenance, the first step to do is prepare tool.
We need to use multimeter, screwdriver, welding tool.
There is four plastic caps on the power adapter, as far as possible not to destroy the adapter shell, shell after destruction, can appear the problems such as electromagnetic radiation, strengthen and influenced the stability of the machine.
If the casing damage, as far as possible.
Disassembly process if the external power supply is not power supply, then try to plug in the battery, if the machine can normal boot, is likely to be the power cord or the adapter.
Open appearance, after open the shield, it is best to first check welding feet, macroscopic observation.
The circuit starts, are generally poor contact.
Then use a multimeter test, try to find out if the power cord is asked.
In the process of test, if it is found that the resistance welding the pin is virtual, repair welding with welding tools, will power adapter installed, boot testing, problem solving.
It is important to note that if in the process of detection, met one capacitor has a problem, you can buy a the same capacitance type and capacity, take welding, there is a problem of capacitance will be the new capacitor welding on them.
If found problems of IC power cord, can also according to the same method to solve.
Of course because of the IC chip is definitely one of the most important electronic components of the power adapter, capacitance is too complex.
Due to the power adapter is now a large number of used SMT components, once the components out of the question, the difficulty of maintenance is more big.
The power increases day by day, the power adapter on the test of electronic components is also more and more big, if the power adapter using electronic components quality closes nevertheless, PCB wiring is undeserved, it is likely to increase the probability of failure.
So the choose and buy a good quality power adapter is important!
Check whether there is any problem on capacitance resistance inductance, such as the capacitance in bulge, best change in time to avoid.