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故障现象１机器在正常运行中 ,图像处理机（ＳＭＩ）经常断电。重新开机后能恢复正常。分析与检修从ＳＭＩ设计原理可知 ,ＳＭＩ断电可由两种原因引起 ,其一是柜内温度过高（超过７０℃） ,其二是输入电源电压偏差大于±１０ %。这两种原因引起的断电都可在柜中的Ｄ３ 板检测出
Symptom 1 In the normal operation of the machine, the Image Processor (SMI) often loses power. It will return to normal after rebooting. Analysis and Maintenance From the SMI design principles, it can be seen that SMI power failure can be caused by two reasons. One is that the temperature inside the cabinet is too high (more than 70°C), and the other is that the input power supply voltage deviation is more than ±10 %. The power failure caused by these two causes can be detected on the D3 board in the cabinet