What are the requirements for PCBA test fixture?

PCBA test fixtures are very important equipment in PCBA processing plants and are typically placed at the end of the production process to detect if the product is intact. When making and testing PCBA test fixtures, it is necessary to meet the specified requirements to improve the accuracy of the test and improve the quality of the products.

First, what is the PCBA test fixture?

 
PCBA test fixture is designed for the product's function, power calibration, life and performance of the product, and other tests. Because it is mainly used in the PCBA production line for the testing of various indicators of the product, it is called PCBA test fixture.

Second, the requirements of PCBA test fixture

 
1. According to the test requirements and the boards that will be tested, after selecting the control method, the structure design of the fixture can be designed. The carrier board, the pressure board, the connector module, etc. can be designed. There have to be aware of is the carrier board and pressure board need reasonably avoiding position, then has appropriate protective measures to avoid damage the board when product testing .

2. The positioning of the fixture is accurate, and the docking of the connector should be smooth.
 

3. The layout inside the fixture box is reasonable, and the space for wiring and installation control system is sufficient.

4. Analog card position of Fiber / MIC / SPK / SIM card should be reserved, and the location is accurate.

5. The position of the interface reserved for the fixture should be correct, sufficient, and the layout is reasonable.

6. The fixture body lock should be replaced by a luggage buckle or a pressure buckle to facilitate replacement of parts and maintenance.

7. Accurate zero correction. The zero drift of the test fixture changes with the change of the test conditions or the test fixture, so zero correction of the open circuit and short circuit is necessary. Therefore, the FCT test fixture has settings for open circuit and short circuit correction.

8. When needles of the fixture happening breaks and aging, you can change the needle to continue to use. If the fixture is damaged and cannot be repaired and the customer changes are no longer used, it needs to be re-created.

PCBA test fixtures are typically tailor-made fixtures for a specific product that increase productivity and product’s quality.