LG CF—29C89彩电,采用MC—74A机芯,具有NICAM(丽音)音频处理和图文电视功能。微处理器采用LG8738—05C(CXP86324),小信号处理电路采用TDA8375、MSP3410或TDA8425、SAA5281等。LG CF—29C89彩电是MC—74A机芯的多功能机型,保护电路更为复杂。该机芯采用I2C总线控制技术,微处理器设有专用保护检测引脚,对开关电源和行输出电路输出的各种电压进行检测,当被检测电压丢失或降低时,微处理器执行 LG CF-29C89 color TV, using MC-74A movement, with NICAM (NICAM) audio processing and teletext capabilities. Microprocessor using LG8738-05C (CXP86324), small signal processing circuit using TDA8375, MSP3410 or TDA8425, SAA5281 and so on. LG CF-29C89 color TV is a multi-function MC-74A movement models, the protection circuit is more complicated. The movement uses I2C bus control technology, the microprocessor has a dedicated protection detection pin, the switching power supply and line output circuit to detect the various voltages, when the detected voltage is lost or reduced, the microprocessor executes