Firstly, the bare printed circuit board is transported from the PCB manufacturer to the PCbA manufacturer and enters the SMT workshop. The next step in the printed circuit board assembly industry is to break through bottlenecks and move towards excellence!

The first step is to take a circuit board and mainly observe the circuit layout of the board, distinguishing various layers and positions. Usually, we use yin and yang boards, four layer boards, double layer boards, and multi-layer boards.
The second step is to remove all modules and place the test points inside. A corresponding industrial control motherboard is used for debugging work. Before wiring, a bit of pressure should be applied to the motherboard. The motherboard does not have any interfaces, which looks a bit like "no words". However, removing so many modules makes it a bit sticky.
Step 4: Use a specialized testing tool - "multimeter testing". Place the test wire (especially the wire assembly and crimping tools) properly, such as. Weld the wire pins from the soldering wire onto the board,
Finally, you can connect the communication line. The debugging method is as follows: (1) The multimeter tests the output of the circuit. If the output of a certain component and the output of the IC are connected together, they will return to the original state. (2) If each component output and IC output are in the same group of states, it should also be powered on as a whole. (3) Detect connections to other interfaces. If the voltage of the pin is not zero, an incorrect connection will also be immediately determined. Only when the residual voltage of the capacitor is broken down or there is leakage must measurements be made to identify whether an incorrect connection has occurred.
What should be considered for the layout of the functional modules of the main control circuit and other functional modules on different ports?
Complete different control strategies based on different system topologies, such as single and dual power supply, constant current source, optoelectronic coupling, constant power, and drive circuits.
: Refers to the output voltage obtained by inputting the power supply from here and passing through a transformer to increase and decrease the voltage.
It refers to the ability to compare and achieve a certain power factor based on its load current and working mode in order to obtain the corresponding power supply from the system.
There are two reasons that can cause internal short circuits in the power supply, namely U1, U2, and U3 discharge. Normally, U1 and U2 discharge will be switched to the load through a switch to provide power.
The control part of a switching power supply usually adopts switching power supply technology, which is mainly divided into AC/DC, DC/DC, AC/DC, and DC/DC.
The AC/DC power supply should have intrinsically safe, stable control and linear voltage stabilizing circuits, as well as good ripple and low output resistance.
DC/DC power converters are mainly controlled (PWM) by DC voltage (or AC power) at the AC voltage terminal, but power semiconductor devices either use AC grid voltage and DC voltage. On the contrary, the converter either uses power semiconductor devices.
PWM can provide rich advantages such as voltage control, monitoring, and feedback. It can control LLC based switches and allow monitoring of products such as capacitors and inductors used for power conversion.