Non-logic printed wiring board test system

Registers – Transfer mechanism – Traveling pawl

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324 73R, G01R 3100

Patent

active

040126250

ABSTRACT:
An automatic printed circuit board tester to test printed circuit boards and diagnose faults in digital and analog electrical circuit networks is disclosed. The system is comprised of control, stimuli, and interconnection networks in combination with measuring instrumentation. For automated fault isolation, a moving probe assembly driven by stepping motors controlled by a minicomputer is utilized. The fault isolation system establishes a fault path 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.

REFERENCES:
patent: 3631229 (1971-12-01), Bens et al.
patent: 3739160 (1973-06-01), El-Hasan et al.
patent: 3764995 (1973-10-01), Helf, Jr. et al.
patent: 3777129 (1973-12-01), Mehta
patent: 3851249 (1974-11-01), Roch
patent: 3931506 (1976-01-01), Borrelli et al .
B394,712 Jan. 1, 1975, Patti, 324/73 R.
Gerhard & Perdick, Computerized Testing of Thin-Film Circuit Conductors, Solid State Technology/Sept. 1971, pp. 41-46.

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