在实际运用中 ,微电子自动闭塞设备经常出现区间通过信号机绿、黄、红灯跳闪现象 ,引发列车停车和机车信号掉码。经过对常发故障点的检测、处理、发现多是电源盒损坏或工作不稳定造成的 ,主要原因如下。1 电源盒内有 2只笨重的工频电源变压器和6个集成稳压器 ,均为发热元件 ,正 In actual application, the micro-electronic automatic blocking devices often appear in the interval through the signal of green, yellow, red light flashing phenomenon, causing train parking and locomotive signals fall. After the detection of frequent points of failure, processing and found that the power box damage or unstable work caused by, mainly for the following reasons. 1 power box has 2 bulky power frequency power transformer and 6 integrated voltage regulator, are heating elements, are