Wannien 101v0 Power Supply Schematic ((free)) Free File

Wannien 101V0 Power Supply — Schematic & Guide

Note: I could not verify an exact product named “Wannien 101V0”; I’ll assume you mean a small PCB/system using a 5–12 V DC input (common for hobby boards). Below is a general, safe, and practical power‑supply schematic and explanation you can adapt for a small electronics board labeled “101V0.” Treat this as a template — verify component ratings and pinouts against your actual board.

Conclusion

Without a more detailed description of "Wannien 101V0," providing a precise schematic or circuit diagram is challenging. Always ensure you're consulting reputable sources for technical information, especially when it comes to electrical and electronics. wannien 101v0 power supply schematic free

1. The "Bad Cap" Syndrome

Budget power supplies are notorious for using electrolytic capacitors that dry out or bulge over time. Wannien 101V0 Power Supply — Schematic & Guide

The Symptom: The output voltage is unstable, won't go to zero, or the display flickers.
The Fix: Open the unit and look at the large capacitors near the transformer. Are the tops bulging? Is there leakage? Replace them with high-quality Low-ESR capacitors (like Nichicon or Rubycon).

Testing & Verification

Visually inspect for solder bridges and correct polarity.
With no load, apply input and verify voltages with a multimeter at each output.
Attach a current-limited bench supply if available; verify current draw under load.
Check regulator temperature under expected load; ensure it remains within safe limits.
Oscilloscope: verify switching node and outputs for acceptable ripple and stability.

2. Dead Set (No Standby Light)

Check the Fuse: If the black fuse is open (infinite resistance), do not replace it yet.
Check the Switching MOSFET: The large transistor attached to a heatsink near the transformer. If the legs read 0 ohms to ground, it is shorted.
Check the PWM IC: Often, when the MOSFET shorts, it takes out the PWM driver IC and a current-sensing resistor (a low-ohm resistor, e.g., 0.33 ohms or 1.5 ohms, usually marked R15 or R22).

1. No Backlight (Dark Screen with Flashlight Test)

The "101V0" designation often implies the LED output voltage. If the screen is dark but you see a faint menu image with a flashlight, the LED driver is dead. The Symptom: The output voltage is unstable, won't

Suspect Components:
- The LED Driver IC: Look for an 8-pin chip (commonly marked OB3350, OB3353, or BD9261). If pin VCC has voltage but the OUT pin is dead, the IC is faulty.
- The MOSFET: A transistor near the LED connector. If shorted, it will blow the fuse.
- LED Strips: It is very common for the actual LED strips inside the panel to fail, causing the protection circuit to shut down the power supply. Disconnect the LED connector and test the voltage at the connector (WARNING: High Voltage Spike). If the voltage jumps to max (e.g., 150V+) and holds, the board is likely good, and your LED strips are broken.