CINRAD/CD接收机疑难故障案例诊断分析

Diagnosis and Analysis of Difficult Fault Cases for CINRAD/CD Receiver

针对CINRAD/CD无机内测试信号的疑难故障案例,介绍如何借助大型电子设备规范化维修的理念和方法,结合雷达系统原理和信号流程,综合运用原理分析法、越级法、测量法、代替法等故障诊断方法进行分析与判断,逐步缩小故障排查范围,从而达到快速定位及排除故障的目的。最终确定该故障是由于接收与监控分机间的信号线断开,造成控制码没有送至微波组件内单刀双掷微波开关所导致的。文中提供了该类型故障的规范化维修流程,其诊断方法和思路可广泛应用于CINRAD技术保障工作中。

For the difficult fault cases of the test signal abnormality of CINRAD/CD, concepts and methods for standardized maintenance of large electronic equipment are introduced. In combination with the principles and signal processing of the radar system, The fault diagnosis methods such as principle analysis, leapfrog, measurement, substitution, and so on, are used to analyze and judge faults, gradually narrowing the scope of troubleshooting. The root cause of the fault is a broken signal line between receiver and monitor unit, resulting in that the control codes cannot be send to SPDT switch in the microwave module. The standardized maintenance procedures about the type of faults are proposed, and the methods and ideas of the fault diagnosis can be used as a reference in CINRAD technical support work.