Wannien 101v0 Power Supply Schematic Repack May 2026

The original PCB had no markings for IC pinouts or component values in many areas. The schematic was reconstructed by:

⚠️ Warning: This power supply has a non-isolated primary side with hazardous voltages. Do not probe unless you are experienced with live SMPS troubleshooting. wannien 101v0 power supply schematic repack

Add your findings back to the community. This is the spirit of the “repack” – shared knowledge. The original PCB had no markings for IC

🔗 [GitHub Repository Link]
🔗 [PDF Direct Download] ⚠️ Warning : This power supply has a

The MOSFET’s gate is driven through a 22Ω resistor and a 1N4148 diode for turn-off speed. The drain is connected to the primary winding of the transformer and clamped by an RCD snubber (resistor 47kΩ, capacitor 102/1kV, diode UF4007).

Schematic insight from repack: The snubber capacitor is often underrated. Upgrade from 1kV to 2kV ceramic in your repack build.

Before diving into the schematic, let’s establish the baseline specifications of a typical Wannien 101V0 unit. While variations exist, the most common model outputs: