Schematic — Wannien 101v0 Power Supply

Drop it in the comments. If you show me the top and bottom of the PCB, I can point you to the exact resistor values.

Disclaimer: Power supplies contain lethal voltages in the primary capacitors (320V DC). Discharge them with a resistor before touching. Safety first. wannien 101v0 power supply schematic

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. Drop it in the comments

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. Discharge them with a resistor before touching

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 .

Let’s crack this open (figuratively and literally). Based on user reports and common grey-label manufacturing, the 101V0 is typically a 12V or 24V DC switching power supply , usually rated between 100W and 150W. It is a close relative of the famous Mean Well S-100-12 or S-150-12 series.