Browse Prior Art Database

Input/Output Connector Fixture for Testing Cards

IP.com Disclosure Number: IPCOM000041963D
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Nelson, DQ: AUTHOR

Abstract

In card testing several needs exist. Positive contact is required during incircuit and functional testing. A need exists to test the edge connector on standard cards. There is also a need for two-stage fixturing for functional testing to eliminate capacitive test points. Finally, it would be advantageous to reduce the number of nail test points for vacuum fixturing. A fixture is illustrated in the figure that will meet the above needs. The card-under-test (CUT) sits under a transparent plastic cover which is attached to two actuator levers. This cover serves as a protection to the test operator from destructive components (i.e., electrolytic capacitors). The phenolic probe block provides the isolation necessary for the probe pins. Phenolic is easily worked by a tool maker. All other parts are aluminum.

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Input/Output Connector Fixture for Testing Cards

In card testing several needs exist. Positive contact is required during incircuit and functional testing. A need exists to test the edge connector on standard cards. There is also a need for two-stage fixturing for functional testing to eliminate capacitive test points. Finally, it would be advantageous to reduce the number of nail test points for vacuum fixturing. A fixture is illustrated in the figure that will meet the above needs. The card-under-test (CUT) sits under a transparent plastic cover which is attached to two actuator levers. This cover serves as a protection to the test operator from destructive components (i.e., electrolytic capacitors). The phenolic probe block provides the isolation necessary for the probe pins. Phenolic is easily worked by a tool maker. All other parts are aluminum. The total travel by the probe block is about one-half inch, which is ample for most CUT connectors. This also allows the CUT probe block to be moved out of the way to load another card to be tested. The entire mechanism is attached to the top plate of the fixture with eight screws. The individual pieces are held together with shoulder screws for ease of motion. The height of the phenolic block can be adjusted with shims between the aluminum slider and the phenolic block.

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