Wannien 101v0 Power Supply Schematic Verified Fix -

Troubleshooting the Wannien 101V0 Power Supply: A Quick Guide Finding a verified schematic for the Wannien 101V0 (often labeled as or associated with the

Section 3: The Constant Current / Constant Voltage (CC/CV) Control (LM324)

The Wannien 101V0 uses an LM324 quad op-amp to manage the two operating modes: Constant Voltage (CV) and Constant Current (CC). wannien 101v0 power supply schematic verified

Section 1: The Auxiliary Power Supply (The Heartbeat)

Before the main output works, the control circuitry needs power. Look for a yellow or blue small transformer on the board—this is the auxiliary supply. Troubleshooting the Wannien 101V0 Power Supply: A Quick

Electrolytic Capacitors: "Capacitor plague" or heat-induced drying often causes ripple voltage issues. Over-Voltage Protection (OVP): Implemented via a Zener diode

• Over-Voltage Protection (OVP): Implemented via a Zener diode and an optocoupler (e.g., PC817) feedback loop. If the output voltage rises above the designated threshold, the optocoupler activates, forcing the primary IC to shut down the gate drive.
• Short Circuit Protection: The controller monitors the auxiliary winding voltage. If a short is detected on the output, the VCC to the IC drops below the Under-Voltage Lockout (UVLO) threshold, causing the system to enter auto-restart mode.
• Thermal Considerations: The board layout, confirmed by the schematic's thermal vias and copper pours, is designed to dissipate heat from the MOSFET and secondary diode without requiring an external heatsink.

A verified schematic reveals a classic SMPS topology consisting of three primary sections:

Model Identification: Often labeled as WAN NIEN E88653-S or 94V-0 (which refers to its flame-retardant rating).