Wannien 101v0 Power Supply Schematic Verified -

Before probing the circuit, verify the board markings to ensure exact schematic alignment. The PCB typically bears the UL file number tracking back to the original board manufacturer:

Locate the relay sub-circuit on the schematic. Test the voltage at the collector of the relay driver transistors while turning the voltage potentiometer up and down. Replace any dead transistors or sticky relays. Calibration Procedures After Repair wannien 101v0 power supply schematic verified

The Wannien 101v0 is popular for converting to a variable bench supply. Based on the verified schematic: Before probing the circuit, verify the board markings

Houses an internal LED and phototransistor. As the TL431 reacts, it changes the brightness of the internal LED. The phototransistor on the primary side senses this change and adjusts the feedback ( FBcap F sub cap B Replace any dead transistors or sticky relays

Wannien 101V0 is a common power supply and inverter board used in older LCD monitors (such as those from Dell, Acer, and ViewSonic). While an official manufacturer PDF is rare, the board is widely documented in repair communities for its simple, single-sided design.

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