Do You Know These Kinds Of Faults Of The Power Adapter?

Today let's take a look at the common faults of the power adapter.
The first is a blown fuse. In general, if the internal circuit of the power supply is not designed properly, the fluctuation and surge of the external grid voltage may cause the current in the power supply to increase instantaneously and cause the fuse to blow. If the fuse is replaced again, the adapter still cannot work normally, and various components on the circuit board are likely to be broken down by the instantaneous high current. The user can disassemble the power adapter to check whether the components inside are burnt or the electrolyte overflows. If there are none, use a multimeter to measure whether the switch tube has a breakdown or short circuit.
Another failure is that the fuse is intact, the power adapter has no DC voltage or the voltage output is unstable. Then it is very likely that there is an open circuit or short circuit inside the adapter. The input current is too high, and the rectifier diode in the high-frequency rectification filter circuit is broken down. Or the control circuit of the power supply is faulty. Specifically, you can use a multimeter to test it to find out the faulty part.
The last common failure is the poor load capacity of the power supply. If the power supply works for too long, the components in each part are prone to aging, so the stability of the voltage is poor during operation, and the heat cannot be dissipated in time. This is also the reason why the old power supply is prone to leakage or fire.