Manufacturers like Wannien often buy OEM PCBs (Printed Circuit Boards) and put them in a silver perforated metal case. The "101V0" is likely a batch code or internal revision number, not a unique design. Forget searching for Wannien 101v0 schematic.pdf . Instead, open the unit and look for the PWM Controller IC .
If you’ve landed here, you are likely staring at a dead power supply. Maybe it’s from a LED sign, a CCTV camera bank, or a 3D printer. The bad news? Official schematics for the "Wannien" brand are almost impossible to find. The good news? The 101V0 is almost certainly a clone of a very common topology. wannien 101v0 power supply schematic
If it just has bulging caps or a blown fuse: Use the TL494 reference design from the Texas Instruments datasheet as your schematic. Every pin on that IC will match your Wannien board. Manufacturers like Wannien often buy OEM PCBs (Printed