Wannien 101v0 Power Supply - Schematic

The board features resistors, capacitors, transistors, and a central IC 1.2.1. 2. Troubleshooting the Wannien 101V0 Power Supply

By reviewing documented repair cases, we can identify typical failure points and effective fixes.

High-capacity electrolytic filter capacitors suppress input noise and voltage ripples. An integrated circuit (IC) voltage regulator smoothly steps down and maintains a highly stable 5V DC output .

Input and protection

The Wannien 101V0 is built to a budget, meaning component degradation is inevitable over years of continuous thermal cycles. The most frequent issues include:

The secondary outputs process low-voltage AC back into stable DC rails (typically +12V, +5V, and +3.3V).

The transformer is connected to the AC mains voltage and steps it down to 12VAC. The rectifier circuit uses a bridge rectifier configuration to convert the AC voltage to DC voltage. The rectifier diodes are 1N5408 types, which provide a high surge current rating and low forward voltage drop. wannien 101v0 power supply schematic

PC817 Transistor side ---(Pulls Pin 1 of TL494 low if voltage rises)

The real challenge was not just to create a power supply that met these specifications but to do so with a focus on high efficiency, low cost, and reliability. The team pored over various power supply topologies, such as Buck, Boost, and Buck-Boost converters, weighing the pros and cons of each.

Check the Primary MOSFET (center pin to outer pins). A reading close to 0 ohms means the MOSFET is shorted and must be replaced along with the fuse. Step 3: Testing Output Voltages If the fuse is fine but the power supply won't boot: Plug the board into mains power safely. Set your DMM to . The board features resistors, capacitors, transistors, and a

Act as electronic gates to toggle outputs out1 through out4 . C1, C2, C3 Filter low-frequency ripples and stabilize inputs/outputs. Ceramic Capacitors

: Look for "bulging" or leaked caps. These are the most frequent causes of unstable voltage or failure to start. Voltage Testing : Use a multimeter to verify the DC output terminals

This usually takes 30–60 minutes and yields a reliable schematic. The most frequent issues include: The secondary outputs

This troubleshooting process is a systematic approach to diagnosing and repairing a common issue with the Wannien 101V0. The steps below detail how a technician identified and resolved the fault: