Wannien 101v0 Power Supply Schematic Verified ~upd~

Measure the output pins. If you have 0V, check the startup resistor (usually a high-value resistor near the PWM IC) which provides the initial "kick" to start the switching process.

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Regardless of the specific device it powers, the core of these switch-mode power supplies (SMPS) follows a standard design. Here are the key components to look for: Measure the output pins

A heavy-duty bridge rectifier (often rated for 15A to 25A) converts AC to pulsating DC. This link or copies made by others cannot be deleted

When a MOSFET fails, it almost always shorts Gate-Drain-Source. This creates a direct short across the 310V DC bus, instantly vaporizing the main fuse (F1).

Wannien 101v0 Power Supply Schematic Verified: A Comprehensive Guide to Troubleshooting and Repair