The WX-DC12003 is a compact 5V, 700mA AC-DC isolated switching power supply that utilizes Primary Side Regulation (PSR) to provide efficient power, though users often seek improved schematics due to variations in component quality and lack of input protection. "Better" designs typically involve adding external fuses, EMI filtering, and additional output capacitance for improved stability. For detailed technical analysis, see the discussions on All About Circuits .
If you tell me what specific issue you're having with the module, I can provide a or suggest a higher-spec replacement . wxdc12003 schematic better
– replace with a 0-ohm jumper (only if using synchronous IC). Or keep diode but add a 47µF ceramic across its anode to ground for snubbing. The WX-DC12003 is a compact 5V, 700mA AC-DC