在维修BG-74型包裹细分机过程中,我们遇到了一个故障,其“症状”暴露得很不明显,一时难以查清故障所在。通过分析、研究和试验,我们摸到了一些规律性的东西,提出来供同行们参考。为了说明问题,先把分拣机控制电路简单介绍一下。右图是一个经过简化了的电路原理示意图。当按下一个十位键和一个个位键(即 In the process of repairing BG-74 parcel feeder, we encountered a problem whose “symptom” exposure was not obvious, so it was hard to find out the fault momentarily. Through analysis, research and experimentation, we have touched some regularities and proposed them for reference. To illustrate the problem, first sorter control circuit briefly introduced. The picture on the right is a simplified circuit schematic. When you press a ten-digit key and one-digit keys (ie