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The FCT Test in which the PCBA is powered up is referred to as an FCT. Among the features are voltage, current measurement and control, power factors, frequency and duty ratio, position determination, LED lighting, LED color, sound recognition, temperature, and pressure measurement control, etc.
What's more essential than adhering to PCB manufacturing's highest quality requirements is ensuring that your board functions as intended. This necessitates a series of tests to be carried out at different phases, including development, production, and assembly.
There are a variety of functional tests that may be performed on a PCB to ensure that it is working correctly. To enable PCB functional testing, the manufacturer may also need to alter the design of the PCB. Sending the design files back and forth should be simple as long as the manufacturer is aware of your device's functional specifications and the testing procedures you've established. Of course, a cloud-based solution for data access is the ideal option.
In order to accommodate a variety of control modes
(1）Manually control functional tests
(2）Semi-automatic control function test
(3）Fully automatic control function test
The early function tests are mostly automated or semi-automatic, with a few exceptions. Manual and semi-automatic methods are still used to simplify the design and lower manufacturing costs. In order to reduce money and increase production efficiency, many functional tests have been automated.
For a different kind of controller:
Manufacturers use functional testing (FCT) to ensure their products are of high quality. Predefined standards for the future use of DUTs are scrutinized throughout the testing process to ensure they are up to snuff. In addition to functional testing, a DUT is recommended to be subjected to undesired conditions in order to see how it responds (e. g. switching off on overvoltage). If a functional item is being manufactured, functional tests are often conducted at the end of the manufacturing line.
During functional testing, a DUT's response to various external stimuli relevant to its intended use is evaluated in great detail. If the anticipated behaviour is met, it passes the test. These are some of the most often cited influences:
Other electrical tests that look for manufacturing flaws by evaluating physical characteristics rather than functional responses (e.g. identification of incorrect soldering by assessing electrical resistances) must be differentiated from functional testing.
Using specialized needle bed adapters, many test locations may be contacted at the same time to inspect built PCBs.
A few successive test points are performed when inspecting the constructed PCBs using universal flying probe testers.
The industrial FCT Test requires the following hardware and software:
Functional Circuit Testing (FCT) is an approach to testing that offers a simulated operating environment for the test target board so that it may operate in predefined states and acquire parameters for each condition in order to validate the UUT. Functional testing of PCBAs is often referred to as PCB testing.
Before the thermal aging test, a functional test (FCT) is performed. It is used to test the PCBA's functional performance in a working environment.
Using PCB software, the following steps may be performed:
The PCB assembly is then connected to the PCBA tester by a test technician, who runs the test program and turns on the PCBA. In Visual Basic, our testing system is set up.
The technician then uses the PCBA tester to read the signals from the PCB chips and route them to the test locations on the board.
This is the most efficient method when using an oscilloscope to view the signal levels and voltage values. Using an oscilloscope linked to a computer, our expert may check for signal integrity and see whether voltages are running correctly by seeing if the screen shows okay or NG (not good) and if the PCBA is okay.
There is a complete record of every step of the testing procedure. IC programming or thermal aging are the following steps in the PCB construction if the computer says so. Once our experts have debugged the computer, all PCBA testing is restarted.
In most cases, we recommend functional testing to clients whose PCBs have an area of more than three square meters. It identifies any open connections, damaged components, solder shorts, and other issues with the PCB. PCB manufacturers use it to provide a high level of accuracy in the assembly process.
This is what you'll gain by working with the FCT:
Finally, the FCT Test is performed. Finished PCBs may be passed or failed using this test, and they can then be sent off. It is an FCT's job to ensure that the manufacturing process is free of faults that might harm the product's ability to perform properly in a system.
Now that you've learned about PCBA functional testing, you should have a better grasp of the process. It might be a frustrating experience for the consumer if the whole PCB fails to operate. For example, the FCT mimics the circuit board's operational environment and helps you avoid any future mistakes.