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故障现象监视器显示亮暗闪烁,透视图象抖动,模糊不清。故障分析与检修根据系统的工作流程确定故障范围。第一步切断影象增强器电源,故障不变,说明问题出自摄象机或监视器。第二步取下摄像机与监视器的接插线,荧光屏上闪烁停止,则初步判断为摄像机电路故障。用示波器观察带宽通道的视频输出,发现其信号上下抖动且与荧光屏上闪烁的频率一致,将通道集成块 IC_1(μA733HC)的同相和反相输入端短接,闪烁
Symptom Monitor display bright dark flashing, perspective image jitter, blurred. Fault Analysis and Maintenance According to the system workflow to determine the fault range. The first step to cut off the image intensifier power, the same failure, indicating that the problem came from the camera or monitor. The second step to remove the camera and monitor the patch cord, flashing stop on the screen, the initial judge for the camera circuit failure. Observe the video output of the bandwidth channel with an oscilloscope and find that its signal jitter up and down and match the frequency of blinking on the screen, shorting the non-inverting and inverting inputs of channel manifold IC_1 (μA733HC), flashing