现在,社会上还有不少大屏幕NTSC-M制式彩电,大多是80年代的产品,还未到设计寿命便被淘汰下来。这类N制彩电,都采用了新技术、新电路、新元件。在伴音方面,多是大功率双声道高保真输出,具有环绕立体声,卡拉OK功能,并设有多路AV、S信号输入、输出,技术水平较高,功能齐全。收看N制节目和播放LD,音像效果甚佳,是家庭影院价廉的终端视听设备。 从附表可看出,由于制式不同,欲正常收看我国P制节目需先进行改制。N制彩电工作原理及信号流程与P制式基本相同,有彩电修理经验者改制也并非困难。原则是尽可能少改或不改,充分发挥和剩用原有电路功 Now, there are many large-screen NTSC-M color TV in the community, most of which were made in the 1980s and have not been designed yet. Such N-color TV, have adopted a new technology, new circuits, new components. In the sound, mostly high-power dual-channel high-fidelity output, with surround sound, Kara OK function, and with multiple AV, S signal input and output, a higher level of technology, full-featured. Watch N programs and play LD, audio and video effects are very good, is the home theater cheap terminal audio-visual equipment. As can be seen from the schedule, due to different formats, to watch the normal program of our P-system need to be restructured. N-color TV working principle and signal flow is basically the same with the P format, a color TV repair experience restructuring is not difficult. The principle is to change as little as possible or not, give full play to and left with the original circuit work