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该机属长虹CN-5机心,音频处理集成电路N661以东芝公司的TA8776N为核心,构成了整机的左右声道音频信号处理或音量控制、左右声道音量平衡控制、重低音信号处理或音量控制电路。上述各种控制信号均在本机CPU的控制下以数据形式和时钟信号、一起沿I2C总线(SDA线和SCL线)进入N661“#!或%&$脚内部接口电路译码产生。因此,I2C总线传输线正常与否是关键,用数字表测()’或*+,脚电压在3.8V范围,
The machine is Changhong CN-5 movement, audio processing integrated circuit N661 to Toshiba’s TA8776N as the core, forming the machine’s left and right channel audio signal processing or volume control, left and right channel volume balance control, bass signal processing or Volume control circuit. The above various control signals are generated along the I2C bus lines (SDA line and SCL line) into the N661 ”#! Or% & $ pin internal interface circuit decoding under the control of the local CPU in data form and the clock signal. , I2C bus transmission line is the key to normal or not, measured with a digital meter () ’or * +, the foot voltage in the 3.8V range,