用户程控交换机故障诊断系统的研制

The Fault Diagnosing System Develepment for user SPC Switching System

本文在介绍用户程控交换机故障诊断基本原理的基础上,采用功能测试的方法,对不同的印刷电路板使用不同的等效黑盒进行测试。在完全不改变整机结构的情况下,仅增加一块诊断板,便可通过软件对各种印刷电路板及其单元电路进行测试和故障诊断。故障定位的准确度对单块印刷电路板,单元电路以及单个 IC 芯片分别为100%,80%以及和70%左右。

This paper adopts a method of functional testing and uses different equivalent black box- es for distinet printed circuit boards,basing on introducing the basic principles for fault diag- nosing user SPC switching system.Under these circumstances of unchanging total hard- wares,to test and diagnose these PCBs and unit circuits with software by adding a diagnosing board.The accuracy for singlePCB,a unit circuit and single IC chip,respectively,are one hun- dred per cent,above eighty per cent and about seventy per cent.