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HOME >> NEWS >> DCS插卡或模块外部的故障判断方法

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DCS插卡或模块外部的故障判断方法

From: | author:kongjiangauto | Release :2021-11-22 | 302 view: | Share:

插卡或模块外部的故障则要逐步检查分析。常用的故障判断方法有：


　　（1） 直接判断法：根据故障现象，范围、特点以及故障发生的记录直接分析判断产生的原因和故障部位，查出故障。


　　（2） 外部检查法：对一些明显的有外部特征的故障，通过外部检查，判断故障部位，如插头松动、断线、碰线、短路、元件发热烧坏、虚焊、脱焊等。有的故障，特别是暂时性故障，可以通过人为摇动，敲击来发现故障。


　　（3） 替换对比法：对有怀疑的故障部件，用备件或同样的插卡或模块进行替换，或相互比较，但要注意，替换前，要先分析排除一些危害性故障，如电源异常、负载短路等引起元件损坏的故障，若不先排除，则替换上的插件或模块会继续损坏。


　　（4） 分段查找法：当故障范围及原因不明时，可对故障相关的部件、线路进行分段，逐段分析检查、测试和替换。


　　（5） 隔离法：可以分段查找法相配合，将某些部位或线路暂时断开，观察故障现象变化情况，逐步缩小怀疑对象，*终查出故障部位，进行处理或更换。
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