Wannien 101v0 Power Supply Schematic Verified [upd] Here

The circuit originates at the AC mains input terminal. It relies heavily on a standard safety configuration:

A verified schematic of the Wannien 101V0 reveals five distinct functional blocks: Input Protection and EMI Filtering wannien 101v0 power supply schematic verified

If you are using the schematic to fix a broken Wannien 101V0, look out for these highly common failure patterns: The circuit originates at the AC mains input terminal

A fast-blow safety fuse protects the upstream circuit from catastrophic shorts. wannien 101v0 power supply schematic verified

Measure between the Drain and Source pins. If you read a dead short (0 ohms), the MOSFET is destroyed and likely destroyed the PWM IC alongside it. Step 3: Hot Checks (Live Voltage Testing)

The primary side uses a Pulse Width Modulation control IC alongside a high-voltage switching MOSFET.