Converts AC input to high-voltage DC. Common failures here cause the main fuse to blow instantly.
What are the printed on the 8-pin or 16-pin chips on the board? Are you seeing a specific error code or physical damage? Wan Nien 101V0 Power Supply Schematic - Expert Q&A wannien 101v0 power supply schematic exclusive
The PSU is trying to start but shutting down due to a short circuit. Check secondary Schottky diodes (D10) or output tantalum/electrolytic capacitors for shorts. Degraded Feedback Loop Converts AC input to high-voltage DC
When probing the primary side of the Wannien 101V0 with an oscilloscope, always power the unit through an isolation transformer to avoid destroying your test equipment or tripping the mains breaker. wannien 101v0 power supply schematic exclusive