Wannien 101v0 Power Supply Schematic Better 🆓 💫

If you are tracing your board, here are the critical test points and what they connect to.

It became a rite of passage for amateur fixers. If you could troubleshoot a 101V0—identifying the "death capacitor" or the blown Schottky diode—you could fix half the electronics in your house. Where is it now?

: Check continuity across the main input fuse. If blown, check for a short-circuit in the primary bridge rectifier or the main switching MOSFET before replacing it. Wannien 101v0 Power Supply Schematic | PDF - Scribd wannien 101v0 power supply schematic

Use the diode testing mode on your multimeter to ensure the switching transistor has not failed open or shorted out entirely. 4. Address Bulging Capacitors

Since Wannien rebrands multiple OEM boards: If you are tracing your board, here are

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Do not attempt to probe the primary side without an isolation transformer. The DC bus is lethal. Where is it now

Flip your board over and look for these key ICs. Once you identify the controller, you’re 80% of the way to a schematic.

Whether dealing with a complete lack of power or voltage drops under a load, the electronic layout of this unit remains highly consistent. Core Circuit Blocks of the Wannien 101v0

The voltage regulation circuit uses a combination of transistors (Q1 and Q2) and voltage regulators (VR1 and VR2) to regulate the output voltage. The transistors are 2SC5200 types, which provide a high current gain and low saturation voltage. The voltage regulators are 5V and 10V types, respectively, which provide a precise output voltage.

Power supply boards like the Wannien 101V0 contain high-voltage circuits that can be lethal. The large capacitor on the primary side can store a dangerous charge (up to 340V DC) for a long time, even after the device is unplugged.