Principles and uses of PCB test racks and PCBA test racks

1.Working principle of test stand

The principles of PCB test stands and PCBA test stands are very simple. They both connect the pads or test points on the PCB board through metal probes. When the PCB board is powered on, the voltage value, current value and other typical values and phenomena of the test circuit are obtained, and the qualified product is judged based on the obtained data.

2.Composition of PCB test rack

The PCB test frame is customized, which is determined by the size of the designed PCB board and the position of the solder joints. It is mainly composed of epoxy board, metal probe, wire and detection interface.

3.Purpose of PCB test stand

It is mainly used to detect the continuity of the circuits between various points on the PCB board to ensure that the product will not have unnecessary short circuits, broken circuits and open circuits.

4.Composition of PCBA test stand

The PCBA test frame is dedicated to special boards. It is composed of the size of the finished PCB board, the location of the test points, various external instruments, interfaces and accessory circuit boards. Commonly used materials include acrylic and bakelite to make the main frame, equipped with some contact pins and wire connections to form a simple test frame.

5.Purpose of PCBA test stand

The PCBA test stand is almost a must-have testing tool in the PCBA production process. Its main function is to test the finished circuit board and determine whether the entire PCB board is successfully welded through the actual displayed signals, sounds, images, temperatures, etc.

The quality of the PCBA test stand is related to the efficiency and pass rate of the test. Due to its long-term and frequent operation, it has high requirements for its quality.