The Wannien 101v0 is not a unique design. It is a clone of a very famous topology. 90% of these Chinese linear supplies are derivatives of the Kepco or HP (Hewlett Packard) designs from the 1970s, filtered through the LM723 application note.
However, I can guide you on how to approach finding a power supply schematic and offer some general insights into power supply design and safety.
: The board generally includes a transformer, rectifiers, filters, and voltage regulators.
: Switching Mode Power Supply (SMPS) combined with an Inverter circuit. Standard Inputs : typically 100–240V AC. Common Outputs : Often includes a