How to learn how to turn on the power source, which is the most common power source, has a switch power source in basic appliances, some of which are linearly stable and are now less used, less efficient, more costly and more heavy. The electrical circuit is simple, and a full stream of four diodes and one condensation provides stable direct current voltage. There are also many advantages, such as low output voltage, high overload capacity。
It's basically a switch power, small size, low cost, and almost linear power. The disadvantage is that electronic components are numerous, faulty and vulnerable. There are also high-quality switch power supplies, which protect many circuits and are not easily damaged, owing to market competition and the emergence of many poor-quality switch power sources。
In electronic maintenance, since the power supply is always working, it is working at high voltage and is running high, and the internal electronic components of the heat are ageing, the power supply is the most easily damaged, but it is also the most easily maintained, and it is the best resource for primary learning and maintenance, and it is possible to measure the output voltage, to determine whether the power is being repaired, to constantly and repeatedly measured and tested, to understand the principle of the power source and to basically repair most electrical equipment。
So how do you learn how to switch power
The first is to find a good switch power, to know the state of the good switch power, preferably to re-exercise the power, to open the shell in dozens of watts, to recognize every electronic element, to test the dot voltage, and to compare the power of the failure switch to the range by recording the normal voltage at these points。
The most important thing is to draw circuit charts based on the pcb circuit board. To learn to turn off the power, you have to learn to draw circuit charts
It's a very important step for you to better understand the circuits, the role of the various electronic components, and there's a lot of similar circuit maps on the internet, but they don't affect you very much。
Drawing sketches from the pcb circuit boards, starting at the end of the 220v feeder line, drawing emi circuits, pfc circuits, current circuits, transformer primary circuits, power chip circuits, transformer secondary circuits, drawing out the entire picture of a switch power source, will make it easy to repair the switch power, and will test the voltage at each node and wave shape at each node, so that the state of a good switch power can be remembered and the problem can be judged by testing the voltage at each node when the switch power is maintained。
For most of the repairs, the pcb line is being run, the direction of the signal is being used to map the electrical circuit, analyse the electrical circuits and perform maintenance tests. If you can draw the switchable circuit drawings, you can do well for the circuit boards, and you can run a lot of circuits, and you can do it very well。
I have many years of experience in the development of software and hardware for single machines, in the maintenance of circuits, in the study of circuits, and in the interest of keeping you from getting lost. Your praise is the most important motivation for me to share my experience。
