Non-logic printed wiring board test system

H - Electricity – 05 – K

Patent

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356/2

H05K 13/08 (2006.01) G01R 31/00 (2006.01) G01R 31/28 (2006.01)

Patent

CA 1065062

ABSTRACT OF THE DISCLOSURE An automatic printed circuit board tester to test printed circuit boards and diagnose faults in digital and analog elect- rical circuit networks is disclosed. The system is comprised of control, stimuli, and interconnection networks in combina- tion with measuring instrumentation. For automated fault isola- tion, a moving probe assembly driven by stepping motors con- trolled by a minicomputer is utilized. The fault isolation system establishes a fault ?ath from an output pin to a terminal point within the network. The location of the terminal point together with a directed graph is utilized to select branches that could cause the failure. -1-

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