Commonly used audio circuits for color TVs: TA8218AH

TA8218AH pin function and reference voltage:

Pin 1: 1.9V - reverse input terminal

Pin 2: 2.1V——R audio signal input terminal

Pin 3: 0V——Ground

Pin 4: 1.9V - reverse input terminal

Pin 5: 2.1V - subwoofer audio signal input terminal

Pin 6: 2.1V——L audio signal input

Pin 7: 1.9V - reverse input terminal

Pin 8: 8.9V - filter

Pin 9: 26V - power supply

Pin 10: 13V——L audio signal output

Pin 11: 4.7V - silent

Pin 12: 4.5V - empty

Pin 13: 0V——Ground

Pin 14: 13V - subwoofer signal output

Pin 15: 5.0V - empty

Pin 16: 4.6V - silent

Pin 17: 13V——R audio signal output