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故障现象:有伴音、无光栅,屏显正常。分析与检修:此机为转修机,送来时,开机屏幕上是带有回扫线的暗绿色光栅,这可能是前维修人员调高加速极电压所致。测量三个阴极电压都在170V 以上,查看线路板,N101、N801等很多地方都焊过,看来原修理人员也没少下功夫。因用户预存台与本地不一样,要想知道有无伴音,必需得重新搜台。但此机是手动搜台,看不到图像又无法搜台,于是从 AV 端口输入
Symptoms: a sound, no grating, the screen was normal. Analysis and Overhaul: This machine is a turnaround machine, when sent, the boot screen is a dark green grating with a flyback line, which may be caused by the former maintenance personnel to increase the acceleration pole voltage. Measurement of the three cathode voltages are above 170V, view circuit boards, N101, N801 and many other places are welded, it seems the original repair staff did not work hard. Due to the user pre-stored station is not the same as the local, in order to know whether there is sound, you must have to search again. But this machine is manual search Taiwan, can not see the image and can not search Taiwan, so from the AV port input