Abstract: The invention relates to a contacting unit for a test apparatus for testing printed circuit boards. The contacting unit comprises a full grid cassette and an adapter. The full grid cassette is provided with a plurality of spring contact pins arranged in the grid of contact points of a basic grid of a test apparatus. The adapter is provided with test needles for electrically connecting each of the spring contact pins of the full grid cassette to a circuit board test point of a printed circuit board to be tested, the spring contact pins being secured in the full grid cassette against falling out on the side remote from the adapter and the test needles being secured in the adapter on the side remote from the full grid cassette. The adapter and the full grid cassette are releasably joined to each other. In this way, both the spring contact pins and the test needles are secured against falling out of the contacting unit in the assembled state of the adapter and the full grid cassette.

Abstract: The invention relates to a full grid cassette for a parallel tester for testing a non-componented printed circuit board, to a spring contact pin for such a full grid cassette and to an adapter for a parallel tester for testing a non-componented printed circuit board.

Abstract: The invention relates to a contacting unit for a test apparatus for testing printed circuit boards. The contacting unit comprises a full grid cassette and an adapter. The full grid cassette is provided with a plurality of spring contact pins arranged in the grid of contact points of a basic grid of a test apparatus. The adapter is provided with test needles for electrically connecting each of the spring contact pins of the full grid cassette to a circuit board test point of a printed circuit board to be tested, the spring contact pins being secured in the full grid cassette against falling out on the side remote from the adapter and the test needles being secured in the adapter on the side remote from the full grid cassette. The adapter and the full grid cassette are releasably joined to each other. In this way, both the spring contact pins and the test needles are secured against falling out of the contacting unit in the assembled state of the adapter and the full grid cassette.

Abstract: The invention relates to a module for a parallel tester for the testing of circuit boards, and to a parallel tester comprising such modules. The modules have circuit boards standing at right-angles to the plane of the basic grid of the parallel tester, and on which contact pins are arranged along one side edge. The contact pins lie with their peripheral surfaces on flat sides of the circuit boards and protrude a short distance beyond the side edge of the circuit board. They are connected electrically and physically to contact fields formed on the circuit board. This arrangement of the contact pins is cost-effective to produce, mechanically stable, and permits the production of modules with a high density of contact pins.

Abstract: The invention relates to a module for a parallel tester for the testing of circuit boards, and to a parallel tester comprising such modules. The modules have circuit boards standing at right-angles to the plane of the basic grid of the parallel tester, and on which contact pins are arranged along one side edge. The contact pins lie with their peripheral surfaces on flat sides of the circuit boards and protrude a short distance beyond the side edge of the circuit board. They are connected electrically and physically to contact fields formed on the circuit board. This arrangement of the contact pins is cost-effective to produce, mechanically stable, and permits the production of modules with a high density of contact pins.

Abstract: The invention relates to a full grid cassette for a parallel tester for testing a non-componented printed circuit board, to a spring contact pin for such a full grid cassette and to an adapter for a parallel tester for testing a non-componented printed circuit board. According to a first aspect of the present invention, spring contact pins are secured in the full grid cassette by means of a film. According to a further aspect of the present invention, the full grid cassette comprises two plates which are movable relative to one another in the axial direction of the spring contact pins and have a play at right angles to the axial direction. According to a third aspect of the present invention, the spring contact pins are designed with a central spring contact point. According to a further aspect of the present invention, an adapter is provided with contact pins fitted with a scanning head, wherein the contact pins have a locking projection securing them against falling out on a guide plate of the adapter.

Abstract: An adapter for a printed circuit board testing device, by means of which the test contacts located on the grid can be connected to test points of a printed circuit board to be tested that are located on and/or off grid means of test pins that are received in guide holes in the adapter and each have a pointed contacting section that is directed towards the respective contact point of the printed circuit board and projects from the adapter and an adjacent guidance section that is guided in the associated guide hole of the adapter, is to be designed so that even test pieces in which the test points are relatively close together and/or with large displacements from the grid can be tested. This is done by reducing the cross-section of the guidance section conically or in steps towards the contacting section, and that the cross-section of the guide bores is correspondingly reduced.

Abstract: A test pin for an adapter for connecting test contacts of a printed circuit board testing device that are located on a grid with test points of a test-piece such as a printed circuit board located on and/or off the grid, wherein in order to connect associated test contacts and test points the test pin can be inserted into guide holes at different inclinations in the adapter and has a pointed contact section that is directed towards the respective contact point of the circuit board and projects from the adapter and an adjacent guidance section that is guided in the associated guide hole of the adapter, is designed so that test-pieces with their test points only a relatively short distance apart can be tested. This is achieved by reducing the cross-section of the guidance section conically or stepwise towards the contact section.