Title :
The fault diagnosis of the printed boards of analog repeater in the program-controlled digital switching system
Author :
Cuiwei, Li ; Yannan, Yao ; Liangzu, Zang
Author_Institution :
Xi´´an Jiatong Univ., China
Abstract :
The analog repeated in the JD-1024 program-controlled digital switching system is characterized by the analog circuits mixed with digital circuits and machinery parts mixed with electric parts on the printed circuit boards. In view of this, in digital circuits a pseudo exhaustive method is used to create test codes. For analog circuits, the different parts are diagnosed by different methods which include dictionary diagnosis and node-multifrequency fault diagnosis. A series of tactics are used in practice which include the semi-period search method, carrying out comprehensive judgement on the multi-output function so that the test is hastened and the fault cover ratio is increased
Keywords :
electronic switching systems; fault location; printed circuit testing; repeaters; JD-1024; analog repeater; dictionary diagnosis; digital circuits; digital switching system; fault cover ratio; fault diagnosis; multi-output function; node-multifrequency fault diagnosis; printed boards; program control; pseudo exhaustive method; semi-period search method; test codes; Analog circuits; Circuit testing; Dictionaries; Digital circuits; Fault diagnosis; Machinery; Printed circuits; Repeaters; Search methods; Switching systems;
Conference_Titel :
Industrial Electronics, 1992., Proceedings of the IEEE International Symposium on
Conference_Location :
Xian
Print_ISBN :
0-7803-0042-4
DOI :
10.1109/ISIE.1992.279664
