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一、现象：1．用诊断软件CIDS／MG中的34进行曝光以检测KV／MA值时，文字屏上的4组MA值和扫描架上的第五组MA值大都为零，偶尔有1组为正常值。2．在M级扫描正常，无故障码。二、分析与检测：根据故障现象，分析有关电路，初步确定故障部位如下：1．MA检测电路；2．MA／KV表电路
I. Phenomenon: 1. When exposure was performed with the diagnostic software CIDS/MG 34 to detect KV/MA values, the four groups of MA values on the text screen and the fifth group of MA values on the gantry were mostly zero, and occasionally one group was normal. 2. The M-level scan is normal and there is no fault code. Second, analysis and detection: According to the phenomenon of failure, analysis of the relevant circuit, preliminary determine the location of the fault is as follows: 1. MA detection circuit; 2. MA/KV meter circuit