East India Technology has an extensive array of PCBA testing equipment and systems. These include Automatic Optical Inspection (AOI), X-Ray Examination (BGA’s), Functional Testing, In-Circuit Testing (ICT) and Framescan. Each of these test methods serves different functions.
AOI testing provides a scan of components for proper placement. X-Ray Examination insures that BGA’s are installed and soldered correctly and will detect any shorts or poor solder joints. Functional Testing provides a partial or 100% test of the finished product. Typically these functional testers are provided by our Customers or designed and manufactured by us with their cooperation. ICT is an electrical probe test on populated PCB’s, checking for shorts, opens, resistance, capacitance, and other basic parameters to demonstrate correct assembly. Framescan is a vector-less test technique used to detect open pins on component packages and connectors. Text fixtures, if required, for any of the testing systems are typically built on-site.
PCBA Testing System
A flow meter manufacturer needed a small, modular test platform for printed circuit board assembly (PCBA) acceptance test. The success of the project would be measured by the ability to accomplish this task accurately, cost-effectively and with minimal cycle time.
PCB Engineers specified a National Instruments PXI system as the basis for the test system because of the wide availability of modules, flexibility in configuration and small size due to the inclusion of a Windows-based controller. The Test-X MT-100 bed-of-nails fixture was specified due to its small size, modularity and ease customization. A separate fixture was developed for each Printed Circuit Board to be tested and a set of standardized connectors were included to facilitate quick change-over.
Test software was written in Lab View and sequenced using Test Stand, which enabled a host of advanced features, including reliability testing and insertion of test data into a database. Ultimately, eight PCBA Testing were implemented using the methodology above and an additional system test fixture designed for the final product configuration.
The modular approach presented herein allowed our customer to leverage their test equipment budget across multiple test fixtures, while at the same time facilitating future capacity increases through the purchase of additional PXI chassis’. This creativity and flexibility demonstrate TCB Engineers’ unique ability to provide complete solutions to complex problems.