Wannien 101v0 Power Supply Schematic Verified Jun 2026

OUTPUT STAGE: +V_Raw → Collector of Q1 (2N3055) Base of Q1 → Series Resistor (100Ω) → Driver from Control Board Emitter of Q1 → Output Positive Terminal

If a factory capacitor fails, always swap it out for a replacement rated with an equal farad value but a higher temperature threshold (105°C) and a slightly elevated voltage rating to prolong service life.

Example: A 120V AC input yields roughly 170V DC across the bulk capacitor, while a 230V AC input yields roughly 325V DC. PWM Control and Power Switching wannien 101v0 power supply schematic verified

Usually located near the AC input; a blown fuse often points to a larger short-circuit issue. Faulty Capacitors:

The driver transistor or the op-amp control loop has failed, meaning no bias voltage is reaching the bases of the pass transistors. Alternatively, the output protection diode is shorted. OUTPUT STAGE: +V_Raw → Collector of Q1 (2N3055)

If you have power but no backlight, check the inverter section for failed transistors or transformers. Step-by-Step Troubleshooting Safety First:

By combining a systematic troubleshooting approach with these community-sourced insights, you have a solid foundation for successfully repairing the Wannien 101V0. If you have performed a successful repair on this board or have discovered other verified component values, please continue to share your knowledge. It is the only way to build a reliable repair guide for this elusive but essential piece of hardware. Faulty Capacitors: The driver transistor or the op-amp

Measure the voltage across the low-voltage side of the optocoupler to ensure the regulation circuit is responding. 5. Pro-Tips for Successful Component Replacement

In the domain of electronics repair and refurbishment, the "Wannien 101V0" power supply board represents a specific class of LCD switching power supply modules often found in older monitors and display equipment. While often unbranded or re-branded by various OEMs, the "Wannien" identifier (often printed on the PCB or transformer) is a key marker for technicians. Obtaining a "verified" schematic for this unit is critical for effective troubleshooting, as these boards are known for specific failure modes related to their capacitor selection and SMD component quality. This text provides a comprehensive overview of the 101V0 architecture, its circuit stages, and the verification process for its schematic diagram.

The relay driver transistors (often small-signal NPNs like the 2N2222 or BC547) or their flyback protection diodes have failed.

: Manages four independent transistor switch paths (labeled OUT1 through OUT4 ).