Often an 8-pin IC (like the LD75xx series). If this fails, the board will appear completely dead.
The Wannien 101V0 typically operates as a . It takes a high-voltage AC input and converts it into stable DC output voltages (commonly 12V and 5V) to power the logic board and backlight of a display.
A PWM (Pulse Width Modulation) controller chip drives a MOSFET to "switch" the DC voltage across a transformer at high frequencies. wannien 101v0 power supply schematic verified
If the output voltage is "pumping" (fluctuating rapidly), the issue is often a faulty optocoupler or a dried-out capacitor on the PWM controller's VCC pin. 4. Safety Warning
Measure the output pins. If you have 0V, check the startup resistor (usually a high-value resistor near the PWM IC) which provides the initial "kick" to start the switching process. Often an 8-pin IC (like the LD75xx series)
For those seeking the full technical layout, you can view the Wannien 101V0 Documentation to confirm component values and trace paths.
The primary bulk capacitor can hold a lethal charge of over 300V DC even after the unit is unplugged. Always discharge the main capacitor using a high-wattage resistor before touching the underside of the PCB. It takes a high-voltage AC input and converts
This component provides feedback from the output side to the input side, ensuring the voltage stays constant.
Usually mounted on a heatsink. Check for shorts between the Drain and Source pins.