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1.故障现象:用测试卡检查实验时,测试卡分辨率良好,用人体透视时分辨率差,象穿透力不够一样。电路分析与检修:用人体透视时,观察影像增强器输出屏影像分辨率良好,则可以确定故障在电视中心控制器,以及摄像机和监视器部分,由于测试卡是用金属材料制成,成份少,层次简单,容易分辨,而人体是由许多密度,硬度不同的成份构成的,层次复杂,特别是当信号通道增益不够时,分辨率就差,形同透视高压不足。首先我们用示波器检查输入给监视器的视频信号,平时与透视时视频信号正常。在逐级检查监视器电路发现1550G菅子输出信号变小,更换同型号菅子后故障消除,机器工作正常。
1. Symptom: When the test card is used to check the experiment, the test card has a good resolution, and when the human perspective is used, the resolution is poor, as is the penetration force. Circuit analysis and overhaul: When using the human perspective, observe the image resolution of the image intensifier output screen is good, you can determine the fault in the TV center controller, as well as the camera and the monitor part, because the test card is made of metal materials, less ingredients The level is simple, easy to distinguish, and the human body is composed of many components with different density and hardness, and the level is complex. Especially when the gain of the signal channel is not enough, the resolution is poor and the high pressure is not enough. First of all, we use the oscilloscope to check the video signal input to the monitor. The video signal in normal and perspective is normal. In the step-by-step inspection of the monitor circuit, it was found that the output signal of the 1550G tweezers became smaller, and after the replacement of the same type tweezers, the failure was eliminated and the machine was operating normally.