Abstract: A board alignment system is provided for a printed circuit board test system wherein at least two spring biased alignment pins have body portions and first and second ends and the second end is tapered to a diameter smaller than the diameter of the body portion. A printed circuit board to be aligned has alignment holes having a diameter larger than the smaller diameter and smaller than the diameter of the body portion.

Abstract: A board fixturing system is described for interfacing a printed circuit board having electronic devices at predetermined locations thereon to a probe plate having electrical contacts at predetermined locations. The fixturing system is mechanical and avoids the problems and limitations of the conventional vacuum fixturing systems. The fixturing system includes a unique conveyor system which is capable of staging one board while testing another, i.e. one board can be tested while another board is advanced toward the test fixture. A cassette system for the probe plates is also provided.