Houses the relay control circuit, which clicks to change transformer taps, minimizing power dissipation across the main transistors. How to Find or Recreate the Wannien 101V0 Schematic
The "101V0" designation often implies the LED output voltage. If the screen is dark but you see a faint menu image with a flashlight, the LED driver is dead.
The PSU is entering "hiccup mode" (over-current protection). Check secondary Schottky diodes for shorts. Degraded Electrolytic Capacitors wannien 101v0 power supply schematic free
If your Wannien 101V0 board is failing, focus on these common points of failure: 12V Power Supply Repair
Have you managed to find a specific schematic for this unit? Drop a link or your repair story in the comments below to help the next hobbyist! Houses the relay control circuit, which clicks to
The high-frequency transformer provides galvanic isolation and steps down the voltage. The secondary side manages regulation:
A blown fuse indicates a catastrophic short circuit on the primary side. The PSU is entering "hiccup mode" (over-current protection)
If you are currently troubleshooting this board, let me know it belongs to, what symptoms it is showing, or which specific components look damaged. I can give you step-by-step diagnostic advice to help get your circuit working again. Share public link
: Look for "domed" or leaking electrolytic capacitors in the secondary output stage. Replacing these is the most frequent fix for "no power" or "power LED flashes" issues.
Converts the high-frequency AC from the secondary winding back into DC. Schottky diodes are chosen for their ultra-fast recovery times and low forward voltage drop.
Converts AC voltage into pulsating DC voltage.