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故障 1 图像显示基本正常 ,只在近场区域有雨状干扰 ,操作功能正常。分析 由于外部原因可以引起此种现象 ,所以应先排除外部因素。关掉机器电源 ,将探头插头拔下后重新开机观察 ,发现故障依旧 ,可以判断是机器本身的原因 ,而这种干扰不分近场和远场 ,一般是在接收电路中产生
Fault 1 The image display is almost normal, and there is only rain-like interference in the near-field area. The operation function is normal. Analysis External phenomena can cause this phenomenon, so external factors should be excluded first. Turn off the power of the machine, unplug the probe and turn it back on. Observe that the fault persists. This can be judged as the cause of the machine itself. This kind of interference is not divided into near field and far field, but is generally generated in the receiving circuit.