Step-down processor altering 12-15V input down to a smooth 5V logic rail. Power Transistors
: Most "no power" or "flickering" issues on these boards are caused by leaky electrolytic capacitors blown ceramic fuse near the AC input. Safety Warning : Because this board contains an inverter, it generates extremely high voltages wannien 101v0 power supply schematic
In short, . The marking is a generic PCB label found on a variety of power supply boards from different manufacturers, used in diverse equipment like laptop chargers and UPS systems. Step-down processor altering 12-15V input down to a
: Reapply high-quality non-conductive thermal paste behind the primary switcher MOSFET and the secondary rectifiers where they clamp onto their respective aluminum heatsinks. The marking is a generic PCB label found
Bypass high-frequency noise near the regulator and switching ICs. R1, R2, etc.
Treat the Wannien 101V0 as a useful, low‑cost building block—but interrogate it. Careful inspection, conservative testing, basic component upgrades, and thoughtful thermal and EMI mitigation convert a cheap module into a dependable part of a safe system.
The schematic typically centers around a (often an OB2263, OB2273, or LD7535 equivalent).