Wannien 101v0 Power Supply Schematic ((link)) Jun 2026

Feedback and regulation

The two 200V caps are in series for 220V operation. For 110V operation, a voltage doubler is engaged by moving the jumper.

The schematic is famous among hobbyists and repair technicians for its :

Do not just replace the fuse. If it blew, a short circuit caused it. Switch your DMM to Diode Test mode and check the four legs of the bridge rectifier. If any diode reads 0.00V in both directions, it is shorted. wannien 101v0 power supply schematic

: Each individual switch block relies on a dedicated trigger circuit. When a signal hits the base of the transistor, it saturates the component to activate its corresponding output line.

If the power supply experiences an overload, the switching MOSFET can short-circuit internally. This usually causes an immediate cascade failure that destroys the main fuse (F1) and sometimes the PWM controller IC.

Wannien Model E88653 *101V0 94v-o Power Supply Board #105X25 Feedback and regulation The two 200V caps are

: This is a standard UL flammability rating for the PCB material itself.

A generic schematic search for “UC3842 flyback power supply schematic” or “12V 5A switching power supply TL431 PC817” will match 80–90% of its circuit.

The platform features an advanced output matrix containing designated natively as OUT1, OUT2, OUT3, and OUT4 : If it blew, a short circuit caused it

This is the weakest point of the schematic.

Look for additional text on the PCB or casing:

An integrated circuit containing an internal LED and a phototransistor. It sends brightness signals across the isolation barrier back to the PWM IC. This tells the PWM IC to widen or narrow its pulses, regulating the output without making a direct electrical connection between the hot and cold sides. 2. Common Failures on the Wannien 101V0