ICT application scope and characteristics

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ICT application scope and characteristics

Check the electrical performance of the online components on the finished board and the connection of the circuit network. It can quantitatively measure devices such as resistors, capacitors, inductors, crystal oscillators, etc., and perform functional tests on diodes, transistors, optocouplers, transformers, relays, operational amplifiers, power modules, etc., and perform functional tests on small and medium-sized integrated circuits, such as all 74 series, Memory class, common driver class, switching class and other ICs.

It discovers manufacturing process defects and component defects by directly testing the electrical performance of the online device. The component class can check for out-of-tolerance, failure or damage of component values, program errors in Memory class, and so on. For the process class, it can be found that such as solder short circuit, component insertion error, plugging reverse, missing loading, pin lifting, virtual soldering, PCB short circuit, disconnection and other faults.

The faults of the test are directly located on specific components, device pins, and network points, and the fault location is accurate. No more professional knowledge is required for the repair of the fault. The program-controlled automated test is simple and quick to test. The test time of the board is usually from a few seconds to several tens of seconds.

significance

On-line testing is usually the first test procedure in production, which can respond to manufacturing conditions in a timely manner, facilitating process improvement and improvement. The fault board tested by ICT is easy to maintain due to fault location and can greatly improve production efficiency and reduce maintenance costs. Because of its specific test items, it is one of the important testing methods for modern large-scale production quality assurance.