哈里斯程控交换机用户电路剖析

Analysis of user circuits in Harris program controlled exchange

哈里斯数字程控交换机在电力通信系统中应用广泛。由于技术资料不全,设备的板件维修一般都是返厂进行。但是对于一些外围板件(如用户板),只要仔细观察,认真分析,完全可以自行维修。笔者对用户板的结构、工作原理进行了认真剖析,逐渐摸清了各类故障发生的原因。文章提出的几个故障排除案例对于处理类似的问题有一定的参考价值。

The Harris digital program controlled exchange has been wildly used in electric power communication system, but the repair of equipment boards has to be done by manufactures because of lacking technical handbooks. By careful study and analysis, some peripheral boards, such as user boards, can be repaired by the staff themselves. The paper analyzes the structure and principle of user board, finds out the reasons for each kind of fault. It provides some reference for the similar problems.