Wx-dc12003: Schematic

The WX-DC12003 is not sold through traditional electronics distributors such as Mouser or DigiKey and lacks an official datasheet or component specification from the original manufacturer. The part number appears to be a seller-specific identifier rather than a standard industry reference. This has led numerous hobbyists and engineers to rely on reverse engineering to understand the module. The general consensus within the community is that the best strategy is to trace the PCB layout to generate a personal schematic and bill of materials (BOM).

If you look at the photo, you will see markings that point out the input (blue circle) and output (green circle) I assume the "L & All About Circuits Looking for data on WX-DC12003 | All About Circuits wx-dc12003 schematic

The most common failure is the switching IC or the Schottky diode on the output side due to overload or thermal stress. The WX-DC12003 is not sold through traditional electronics