: The board features four independent transistor switch circuits labeled out1 through out4 .
: Used for filtering electrical noise and stabilizing the output voltage.
You don’t need the original. Grab a multimeter and a notebook. Follow this order:
If the power supply experiences an overload, the switching MOSFET can short-circuit internally. This usually causes an immediate cascade failure that destroys the main fuse (F1) and sometimes the PWM controller IC. wannien 101v0 power supply schematic
| Component | Value | Role | |-----------|-------|------| | F1 | T3.15A 250V (slow-blow) | Input protection | | BD1 | GBU806 (8A 600V) | Bridge rectifier | | C5, C6 | 220µF 200V (x2) | Bulk storage | | Q1, Q2 | MJE13007 (or 13009) | Switching transistors | | C14, C15 | 330nF 250V (x2) | Half-bridge capacitors | | T1 | EI33 or EE35 core | Main transformer | | D9, D10 | MBR20100CT (20A 100V) | Output Schottky | | U1 | TL494CN | PWM controller | | U2 | PC817C | Optocoupler | | U3 | TL431 | Voltage reference | | L1 | 3.3µH (yellow-white toroid) | Output filter inductor |
This is a detailed technical post regarding the power supply. This unit is commonly found in LED drivers , CCTV cameras , 3D printers (as a drop-in replacement for smaller Mean Well units), and industrial control boxes .
Industrial and display environments can trap moisture. Look at the main wire harness connectors. Clean away any green or white buildup with isopropyl alcohol to ensure clean contact. Wannien 101v0 Power Supply Schematic | PDF - Scribd : The board features four independent transistor switch
The quest for the "Wannien 101v0 power supply schematic" is ultimately a journey of discovery. There is no single schematic to download because "Wannien 101v0" is a generic marking, not a model number. However, armed with the knowledge of what this marking really means and a systematic troubleshooting approach, you can conquer these repairs.
The power supply was completely dead, with no output voltage. When connected to a 220V mains supply, the primary side of the board was receiving the correct high voltage after initial repairs, but the secondary side remained at 0V, indicating a fault in the primary-side switching circuit or the secondary-side regulation components .
The schematic is famous among hobbyists and repair technicians for its : Grab a multimeter and a notebook
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
It uses an optocoupler (usually a PC817) to "talk" across the high-voltage gap. This allows the low-voltage side to tell the high-voltage side to "slow down" or "speed up" to keep the voltage steady. The Cult of Repair