扬扫描电路是电视机故障的高发区,且故障现象多样、涉及面多、检修难度大,给维修人员尤其是初学者带来很大的麻烦。在此,笔者将自己在维修工作的亲身经历奉上,与同行共同研究,算是抛砖引玉。例1 机型:长城JTC471型现象:图像上部出现回扫亮线,且随频道转换回扫亮线有所变化(见图1)。 Jan scan circuit is a high incidence of television failure, and the phenomenon of various failures, involving more than surface, maintenance difficult, to maintenance personnel, especially for beginners a great deal of trouble. Here, I will offer their own personal experience in the maintenance work, and their peers to study together, be paramount. Example 1 Model: Great Wall JTC471-type phenomenon: the back of the image appears bright line, and with the channel switching back to the bright line has changed (see Figure 1).