Wannien 101v0 Power Supply Schematic 🎁 Ultra HD

While a complete, official schematic for the Wannien 101V0 (E88653)

The Wannien 101V0 is an internal power supply board famously used in the TI-99/4A home computer. It is responsible for converting incoming AC voltages into the regulated DC rails needed for the system's logic and video components. Core Function & Output wannien 101v0 power supply schematic

• Primary winding (pins 1-2)
• Auxiliary winding (pins 3-4) to power the PWM IC after startup.
• Secondary winding (pins 5-6) for the main output.

5. Alternative: trace the PCB yourself

Draw connections from the IC pins using datasheets: While a complete, official schematic for the Wannien

1. Identify PWM controller IC (most likely 8-pin DIP/SOP)
2. Datasheet gives pinout: VCC, GND, OUT, FB, CS (current sense), RT/CT
3. Follow the feedback path from secondary (TL431 cathode to optocoupler LED)