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故障现象:一台海信TC2111型彩电,开机、声、光、图正常,且遥控器及面板操作均正常,就是出现画面、文字边缘有细齿状扭曲(图像边缘有细毛刺),整个屏幕看似有一层小溪流过。当亮度调到刚能看见图像时,故障不明显,且TV、AV状态下都是如此。分析检修:根据以往经验,将电源、行推动、行输出部分的电容、视放电源电容、尖峰吸收电容、负反馈电容、电源开关管、行输出管逐一代换,仍不能排除故障,
Symptoms: a Hisense TC2111-type TV, boot, sound, light, map normal, and the remote control and panel operation are normal, there is a picture, the text has a serrated edge distortion (edge of the image with fine burr), the entire screen to see It looks like a stream flows through it. When the brightness is adjusted to just see the image, the fault is not obvious, and TV, AV state are the case. Analysis and maintenance: According to past experience, the power supply, the line to promote the output part of the capacitor, depending on the power capacitor, peak absorption capacitor, negative feedback capacitor, power switch, the output line by line substitution, still can not rule out the fault,