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彩电常因元件接触不良而产生故障。其特点是:时而正常,时而不正常(如:开机后有时工作,有时不工作);图像、声音或彩色时有时无;光栅忽明忽暗,忽大忽小等。故障出现时,有时拍拍机壳或摇动电路板可以暂时排除;有时刚开机工作正常,要工作一段时间后故障才出现。此类故障往往重复发生,似乎没有规律。但检修仍有规可循。以下是此类故障检修的经验点滴。
Color TV often due to poor contact failure. Its features are: sometimes normal, sometimes not normal (such as: boot sometimes work, sometimes do not work); image, sound or color sometimes without; raster flickering, suddenly big and small. Occurrence of faults, sometimes patting the case or shaking the circuit board can be temporarily ruled out; sometimes just started working properly, to work for some time after the fault appeared. Such failures are often repeated, it seems there is no law. However, maintenance is still rules to follow. The following is the experience of such troubleshooting.