Wannien 101v0 Power Supply Schematic Verified Verified -

Compact PCB spare part, often labeled with MPN 101V0. 2. Common Circuit Topology

A shorted Schottky diode on the output or dried-out, bulging output filtering capacitors will trigger the PWM chip's over-current protection (hiccup mode). Optocoupler or TL431

If you are using the schematic to fix a broken Wannien 101V0, look out for these highly common failure patterns: wannien 101v0 power supply schematic verified

| 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 |

This comprehensive guide breaks down the architecture, circuit stages, common failure points, and repair strategies for the Wannien 101V0 bench power supply. Whether you are troubleshooting a dead unit or analyzing the circuit for educational purposes, this verified breakdown provides the technical clarity you need. Technical Specifications Overview Compact PCB spare part, often labeled with MPN 101V0

A telling failure reported in a Lyonn Desire-500 UPS was a persistent alarm for excessive power consumption. This led the technician to a specific area of the board:

As of 2026, no single “official” schematic exists because Wannien is an OEM brand. The most trusted community sources are: Optocoupler or TL431 If you are using the

the exact feedback loop parameters to ensure rock-solid voltage stability.

These boards are frequently seen in the secondary market as spare parts for marine or industrial systems, such as those sold by Rajani Marine . Typical Architecture of a 101V0 Power Supply

If a full board swap is required, look for exact physical dimensions and matching output rails. Industrial surplus vendors like Paragon Technologies regularly stock and evaluate refurbished E88653-S boards, offering a direct, plug-and-play solution.