A verified schematic ensures that component values, semiconductor pinouts, and trace connections accurately reflect the physical hardware. This guide breaks down the core sections of the Wannien 101V0 power supply topology based on verified circuit layouts. Core Circuit Stages of the Wannien 101V0
Verification means: at least one other person (or you, after a week) can rebuild the circuit from your drawing and it works.
| Reference | Component | Function | |-----------|------------------------|----------------------------------------| | F1 | Fuse (slow‑blow) | Overcurrent protection | | RV1 | Varistor (7D471) | Surge / overvoltage protection | | CX1 | X‑capacitor (0.1–0.33µF) | EMI filtering across L/N | | L1, L2 | Common‑mode choke | Suppresses conducted EMI | | D1–D4 | 1N4007 or similar | Bridge rectifier | | C1 | 47–100µF, 400V | Bulk DC link capacitor | | IC1 | PWM controller | UC3842/3843, OB2263, etc. | | Q1 | MOSFET (600V, e.g., 2N60) | Switching transistor | | T1 | Flyback transformer | Galvanic isolation & voltage conversion| | D5 | Fast recovery diode (e.g., UF4007) | Secondary rectification | | C2, C3 | Low‑ESR electrolytic (e.g., 1000µF, 25V) | Output filtering | | IC2 | Optocoupler (PC817) | Feedback isolation | | IC3 | Voltage reference (TL431) | Sets output voltage via divider | wannien 101v0 power supply schematic verified
Power-up with limits
Works in tandem with the capacitors to eliminate residual switching ripple. Stage 5: The Feedback and Isolation Circuit You should see a forward voltage drop of roughly 0
Check the four internal diodes. You should see a forward voltage drop of roughly 0.5V to 0.7V in one direction and an open circuit (OL) in reverse.
Bulging or leaking electrolytic capacitors (especially secondary output capacitors). cracked solder joints around high-thermal areas
Begin with unpowered safety checks. Use your multimeter to verify the main fuse. Visually inspect the board topology for any bulged capacitor tops, cracked solder joints around high-thermal areas, or scorch marks around the . Step 2: Main Rail Validation