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故障现象实时图像正常,踩下冻结开关后图像不冻结,画面无变化。故障分析该仪器是一便携式B超诊断仪,由主机和冻结器两部份组成,其原理框图见图1,上部是主机,下部是冻结器。主机将实时信号输入冻结器,由电子开关控制实时或冻结显示。在实时(MELT)状态,实时信号直接通过视频输出端送主机显示;而冻结
Symptom Real-time image is normal, after the freeze switch is pressed, the image does not freeze and the picture does not change. Fault Analysis The instrument is a portable B-ultrasound diagnostic apparatus, the host and the freezer two parts, the block diagram shown in Figure 1, the upper is the host, the lower is the freezer. Host real-time signal input to the freezer, controlled by the electronic switch in real time or frozen display. In real-time (MELT) state, real-time signal directly through the video output to the host display; and freeze