If you are tracing the circuit without a full schematic, focus on these critical components usually found on the 101V0 board: PWM Controller: Often an IC like the or similar, which drives the switching MOSFET. Filter Capacitors:
Some old electronics repair websites from the 2000s have closed down, but their schematic PDFs live on at archive.org. Try searching: "Wannien 101V0" filetype:pdf .
