Wannien 101v0 Power Supply Schematic -

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

Auxiliary winding and VCC regulation

Expert Databases: Brief diagnostic advice is occasionally found on professional Q&A sites like JustAnswer.  Wan Nien 101V0 Power Supply Schematic - Expert Q&A wannien 101v0 power supply schematic

| Original Component (Guess) | Common Substitute | Notes | | :--- | :--- | :--- | | PWM Controller (8-pin) | UC3843AN | Do not use UC3842 (different UVLO thresholds). | | MOSFET (TO-220) | IRF740, 11N60, 10N60 | Ensure Vdss > 600V. | | Secondary Rectifier | MBR3045CT (30A, 45V for 12V out) | For 24V output, use MBR20200CT (200V rating). | | Optocoupler | PC817C, LTV817 | Almost any 4-pin DIP opto works. | | Voltage Reference | TL431CLP | Standard. Check pinout (K, R, A). | | Main Filter Cap | 100uF, 400V (105°C) | Do not undersize the temperature rating. | The Wannien 101V0 is an internal power supply

, common for standard switching power supplies of this type. Common Troubleshooting Points Wan Nien 101V0 Power Supply Schematic - Expert