100V – 240V AC (Universal Wide-Input) Input Frequency: 50Hz / 60Hz

For the Wannien 101v0, most technicians report failures originating in the primary side of the board. This is the section that handles the incoming high-voltage AC power. The symptoms are unmistakable: a completely dead unit with no output voltage. If you face this issue, here is the primary-side repair strategy, compiled from real-world fixes:

Suppresses high-voltage spikes and transient surges from the AC line.

The 101V0 board often employs a linear voltage regulator or a switching regulator IC to convert the 12V-15V input down to 5V. If the output on your device is dead, this IC or its immediate filtering capacitors are the primary culprits. C. Transistor Switch Circuits (out1-out4)