Without schematic diagram, it is difficult for many people to understand PCB diagram! (Unless it is a simple PCB! )

It makes no sense to understand! ~

Look at PCB, only when checking and repairing.

Looking at PCB, we just look at where the pins of the component graphics of the screen printing layer are connected with wires.

The rest depends on the process: whether the process is suitable, whether the electrical characteristics are satisfied, such as whether the line width and current are reasonable, whether the heat dissipation layout is reasonable, whether the electromagnetic compatibility is reasonable, whether the distributed capacitance and inductance are reasonable, whether the signal integrity is reasonable, whether the interface position is correct, and so on. These, it is impossible to learn quickly, these are the skills of drawing PCB for N years.

Exquisite PCB is for appreciation! ~

Rough PCB is used to despise! ~