Wannien 101v0 Power Supply Schematic Verified 【REAL — 2025】

If you have a verified schematic, consider sharing it on a repair forum to help the community.

. It is a DIN-rail mountable or internal switching mode power supply (SMPS) commonly found in older monitor models. Visual Reference : High-resolution photos and unit descriptions available on

Because these boards generate significant heat during transformer scaling and regulation, inspect the underside of the PCB for fractured or dull solder joints around high-heat components like the transformer pins and power transistors. wannien 101v0 power supply schematic verified

Power-up with limits

If your board has 101V0 printed, it likely uses a discrete flyback with TL431 + optocoupler feedback. If you have a verified schematic, consider sharing

If you cannot find the exact component, compare the schematic with standard 12V-to-5V regulator circuits to identify compatible replacements.

To minimize power dissipation across the main series pass transistors, the Wannien 101V0 features an automated relay switching network. An operational amplifier monitors the target output voltage set by the user. If you turn the voltage knob past specific thresholds (e.g., 8V or 16V), a corresponding relay clicks, switching the rectifier bridge to a higher transformer tap. 2. Rectification and Bulk Filtering To minimize power dissipation across the main series

A PWM (Pulse Width Modulation) controller chip drives a MOSFET to "switch" the DC voltage across a transformer at high frequencies.

With the in hand, you are no longer flying blind. You can diagnose, repair, and even upgrade this versatile bench supply to last another decade.