Schematic — Wannien 101v0 Power Supply

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

This report provides a detailed technical analysis of the Wannien 101V0 power supply schematic. The 101V0 is a single-output, isolated AC-DC Switch-Mode Power Supply (SMPS) typically utilized in low-to-mid power consumer electronics, LED lighting, or embedded industrial systems. The schematic reveals a standard flyback converter topology utilizing a proprietary Wannien PWM controller, reinforced with standard protection circuitry for over-voltage (OVP), over-current (OCP), and short-circuit protection (SCP).

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These heavy-duty diodes handle high-frequency switching to rectify the low-voltage AC back into DC. wannien 101v0 power supply schematic

Are you planning to or are you looking to replace it with a modern switching power supply? Brad Steiger - A Roadmap of Time - How The Maxwell - Scribd

: 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

: The board is designed around standard switching power principles, featuring a primary side for high-voltage rectification and a secondary side for regulated low-voltage output (typically 5V and 12V DC). Flip your board over and look for these key ICs

In industrial environments, inspect all board connectors for oxidative buildup or corrosion, which can mimic a component failure by creating open circuits.

Ensure all connectors are secure and free from corrosion 1.2.2. 3. Accessing the Schematic Diagram

Detailed PDF diagrams are sometimes available on technical document repositories like Scribd or specialist repair platforms like JustAnswer . The 101V0 is a single-output, isolated AC-DC Switch-Mode

Measure across the main fuse (F1). If it reads open circuit (OL), the fuse is blown.

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When repairing the Wannien 101V0, use this general component reference table for selecting replacements. Always verify the physical markings on your specific revision of the board before ordering parts. Circuit Identifier Component Type Typical Value / Spec Ceramic Fuse 2A to 3.15A / 250V (Slow-Blow) Overcurrent protection C1 Bulk Capacitor 68µF to 120µF / 400V–450V Primary DC smoothing Q1 Power MOSFET N-Channel (e.g., 7N60, 4N60) High-speed switching IC1 PWM Controller 8-pin DIP or SOP (e.g., UC3842, OB2263) Switch timing control PC1 Optocoupler PC817 / EL817 Feedback loop isolation IC2 Shunt Regulator TL431 / AZ431 (TO-92 package) Output voltage reference C_out Secondary Caps 470µF to 1000µF / 16V–25V Low-ESR output smoothing