On the PCB board, there are many silk-screened letters, such as R109, C113, Q105, D206, etc. What do these letters/numbers mean?
At present, there is no strict standard for the meaning of the letters/numbers on the PCB board, and they are not always consistent with the above table. They can be defined manually. As long as the component labels in the design schematic diagram are consistent with those on the PCB, it is convenient for communication among all parties and production and manufacturing.
