The Wannien 101V0 power supply schematic can be divided into several sections:
This stage turns the steady DC voltage into a high-frequency square wave so it can pass through a relatively small transformer. wannien 101v0 power supply schematic
| Component | Value | Role | |-----------|-------|------| | F1 | T3.15A 250V (slow-blow) | Input protection | | BD1 | GBU806 (8A 600V) | Bridge rectifier | | C5, C6 | 220µF 200V (x2) | Bulk storage | | Q1, Q2 | MJE13007 (or 13009) | Switching transistors | | C14, C15 | 330nF 250V (x2) | Half-bridge capacitors | | T1 | EI33 or EE35 core | Main transformer | | D9, D10 | MBR20100CT (20A 100V) | Output Schottky | | U1 | TL494CN | PWM controller | | U2 | PC817C | Optocoupler | | U3 | TL431 | Voltage reference | | L1 | 3.3µH (yellow-white toroid) | Output filter inductor | The Wannien 101V0 power supply schematic can be
If you are tracing your board, here are the critical test points and what they connect to. wannien 101v0 power supply schematic
If you are reading this, you have likely typed into a search engine because your unit is dead, behaving erratically, or you simply need to understand its topology before reversing engineering it.
Power supplies contain high-voltage capacitors that can retain a dangerous charge even after the device is unplugged. Only attempt repairs if you are a qualified technician. Always use an isolation transformer and discharge capacitors before working.