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上门维修一台创维CTV-2550WF型彩电,故障表现为:在TV/AV状态下均有正常伴音,但均无图像,屏幕为蓝屏显示。由于故障现象在TV和AV两个状态下均有表现,因此分析认为:故障范围应在这两个状态共同工作的电路部分;TV/AV切换电路和小信号处理集成电路OM8361的视频信号处理部分等。首先
Home maintenance of a Skyworth CTV-2550WF-type TV, fault performance: in the TV / AV state have normal sound, but no images, the screen is blue screen. As the fault phenomenon in both TV and AV performance, so the analysis that: the scope of the fault should work together in these two states of the circuit part; TV / AV switching circuit and small signal processing integrated circuit OM8361 video signal processing section Wait. First of all