If the schematic shows Vcc connected differently, it’s suspicious.
Always perform a ring test on the transformer and measure the current sense resistor when reverse-engineering any Wannien 101v0 board, as these two components vary most between production batches. wannien 101v0 power supply schematic verified
The workbench light flickered once, then held steady. Leo rubbed his eyes, the ghost of a soldering iron’s smoke still clinging to his glasses. On the mat in front of him lay the corpse of a Wannien 101v0—a cheap, cheerful, and notoriously undocumented switching power supply. Its capacitors were bloated like tiny beer bellies, and a scorched MOSFET told the tale of its violent death. If the schematic shows Vcc connected differently, it’s