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一、黑白电视机概述通过对“超外差收音机检修讲座”的学习,我们已经掌握了一些晶体管放大电路的基础知识。这就为我们学习黑白电视机的检修技术奠定了基础。与超外差收音机电路相比,黑白电视机电路是复杂了一些。但通过对各单元电路的分解,我们看到的仍是一条条(从高频信号到中频信号,再到视频、音频信号)“信号通道”,只是比收音机电路中的“信号通道”多了几条岔道而已。
A black and white TV overview Through the “superheterodyne radio overhaul lecture,” the study, we have mastered some of the basics of transistor amplifier. This laid the foundation for us to learn black and white TV repair technology. Compared with superheterodyne radio circuits, black and white TV circuit is a bit more complicated. However, through the decomposition of each unit circuit, we still see a “signal path” from high frequency signal to intermediate frequency signal to video and audio signal, only more than the “signal path” in the radio circuit A few switches it.