Apparatus for physically locating faulty electrical components

Details Apparatus for physically locating faulty electrical components Apparatus for physically locating faulty electrical components

1988-01-28

1990-04-17

Smith, Jerry

Excavating

3642653, 3642655, 3642674, 3642676, 371 165, 371 511, G06F 1122

Patent

active

049186930

ABSTRACT:
In a computer system in which addressable components are physically organized on separately-replaceable printed circuit boards each containing an array of separately addressable components, diagnostic apparatus operates in the event of a component failure to assist a technician in physically locating the circuit board which contains the failed component. Each array includes a selection circuit which responds to component addresses located in the component array on that board. In the case of a component failure, diagnostic circuitry detects the address of the faulty component and places the address on the system address bus. The diagnostic circuitry controls each array to forward the output signal from the selection circuit on the associated printed circuit board to a register which has a position associated with each printed circuit board. Since only the selection circuit in the array which contains the faulty component responds to the address of the faulty component, the diagnostic register can be examined by the diagnostic circuitry to detect the position of the faulty board.

REFERENCES:
patent: 3814922 (1974-06-01), Nibby et al.
patent: 3982111 (1976-09-01), Lerner et al.
patent: 3999051 (1976-12-01), Petschauer
patent: 4468731 (1984-08-01), Johnson et al.
patent: 4621364 (1986-11-01), Tschoepe
patent: 4637019 (1987-01-01), Rahimzad
patent: 4809276 (1989-02-01), Lemay et al.

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