How do you identify PCB parts?
For electronic technicians who are just getting started, master the basic circuit principles, the function characteristics and detection of Electronic Components, and how to analyze the schematic diagrams. These are all basic skills and need to be mastered. Here to talk about how to identify the Electronic Components on the circuit board?
The layout of Electronic Components on the circuit board and the schematic diagram are quite different, which will make beginners feel "intricate". In fact, there is a magic way to know the Electronic Components on the PCB.
1. In the actual analysis of the circuit board, first, according to its appearance, see what electronic components the Electronic Components have seen before, but the accuracy of this point is not high.
2. Secondly, it is identified by the printing of Electronic Components itself. Generally speaking, the printing expresses certain parameters or models. Of course, there are also attributes such as the manufacturer's batch number and version number. Some internationally certified symbols are also available. This method also depends on the usual electronic The level of understanding of component models, parameters, etc.
For example, a triode-like device, marked C1815 is a low-power low-frequency NPN transistor; marked TL431 is an integrated voltage regulator IC; if marked 13001, it is a low-power switch tube, which can be used in a small low-power charger.
You can disassemble the Electronic Components again to see the internal structure. A certain type and series of components have the same or similar structural features. There are many more disassembled, and I am more familiar with the internal structure and working principles of Electronic Components. You can disassemble as many Electronic Components as possible to further improve your basic Electronic Components knowledge.
3. If the Electronic Components are on the circuit board, then judge according to the Electronic Components symbol and silk screen on the board. If it is marked R12, it is a resistance, which is numbered 12 in the circuit. X, Y, and Z can all represent crystal oscillators, and at the same time, you can judge the function of the components according to the circuit where they are located, and then analyze which type of Electronic Components it belongs to, which requires you to be familiar with the basic circuit.
Due to technology, production and manufacturer reasons, the same electronic components will have different shapes, structures, and materials. It is necessary to understand as much as possible, which will greatly help the accumulation of knowledge.
