: While a specific "A20112" schematic is often sought by repair enthusiasts looking for "PCB0100B-V07" board layouts , its design follows the standard SMPS anatomy :
The circuit begins with the AC input (usually 230V or 110V). Components like , fuses , and interference capacitors are placed here to protect the circuit from surges and filter out electromagnetic interference (EMI). PFC (Power Factor Correction) Stage a20112 power supply schematic
This is the heart of the unit.