MICROLAB A6331 – MICROLAB A6612 – HTS Circuit Diagram 4558 – TDA7377 – TC4053 – TDA2030A April 12, 2017 Schematic: Microlab A6612 and Microlab A6331 Home Theater system . Used ICs: 4558 – TDA7377 – TC4053 – TDA2030A A6331 - Circuit Diagram A6612 Circuit Diagram Click on the schematics to magnify Read more