This section handles the high-voltage mains electricity coming from your wall outlet. It is called the "Hot" side because touching any component here while the board is plugged in poses a severe shock hazard.
Always replace failed capacitors with high-quality, high-temperature (rated for 105°C), Low-ESR variants from reputable manufacturers (such as Panasonic, Nichicon, or Rubycon). Match the capacitance ( wannien 101v0 power supply schematic free
An inductor coil (choke) and X/Y capacitors filter out electromagnetic interference. high-temperature (rated for 105°C)
This is the heart of the SMPS, where the DC voltage is chopped into high-frequency pulses to drive the transformer: wannien 101v0 power supply schematic free