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本机电路共分四个部分:公共通道,解码部分,扫描电路和电源等。图像通道中放用的是TA7607AP;伴音通道用的是TA7176AP;色度处理电路用的是TA7193AP;扫描处理电路用的是TA7609P。采用该机芯的国产彩电主要有:上海Z247—1A、如意SGC5602、北京836、海燕CS37—2、CS—56—2、成都C37—416B、黄河7190HF等。下面介绍其开关电源工作原理。该机开关电源原理图如图1所示,它是采用并联输出频率控制型开关电源,其工作频率不受行频控制
The local circuit is divided into four parts: public channel, decoding part, scanning circuit and power supply. TA7607AP is used in the image channel; TA7176AP is used in the audio channel; TA7193AP is used in the chrominance processing circuit; and TA7609P is used in the scan processing circuit. Domestic use of the movement of color TV are: Shanghai Z247-1A, wishful SGC5602, Beijing 836, Swift CS37-2, CS-56-2, Chengdu C37-416B, the Yellow River 7190HF. The following describes the working principle of its switching power supply. The machine switching power supply schematic diagram shown in Figure 1, it is the use of parallel output frequency control switching power supply, the operating frequency is not subject to line frequency control