PCBA Testing Service

Various testing methods such as ICT, FCT, AOI, and flying probe testing ensure the quality of your products.

ICT (In-Circuit Test)
Definition:
ICT is a specialized electrical testing method for printed circuit boards (PCBA), which allows for the electrical and soldering conditions of all components on the circuit board to be tested through pin-point detection without disassembling electronic components.

Features:

Test Content: Mainly includes issues such as short circuits, wrong components, missing components, tombstone components, bridging, and the performance of components like resistors, capacitors, inductors, relays, ICs, and connectors.
Test Advantages: Fast testing speed and short duration; excellent retestability, reducing the risk of misjudgment and missed tests; can lower product maintenance costs and improve product quality.
Working Principle:
The principle of ICT testing is to achieve testing objectives by connecting the test points arranged on the circuit board through a pin bed. In order to accurately measure parameters such as resistance values, capacitance values, and voltage, all component contact legs need to be extended to the test points.

FCT (Functional Circuit Test)
Definition:
FCT is a testing method that provides a simulated operating environment (stimuli and load) for the target test board (UUT: Unit Under Test), allowing it to operate in various design states, thereby acquiring parameters of each state to verify the functionality of the UUT.

Testing Method:
Apply appropriate stimuli to the UUT and measure whether the output response meets requirements. Generally refers specifically to the functional testing of PCBA.

Function:
FCT verifies the functional status of PCBA to ensure it can operate normally in practical applications.

AOI (Automated Optical Inspection)
Definition:
AOI is an automated inspection method that uses optical imaging technology to detect components and solder joints on PCB boards.

Working Principle:
AOI systems use high-resolution cameras to capture images of PCB boards and then compare them with preset standard templates through image processing software to detect any defects.

Application:
AOI technology is widely used in PCBA processing for pre-weld and post-weld inspections, which can detect various common manufacturing defects such as welding defects, missing components, misalignment, and polarity errors.

Flying Probe Test
Definition:
The flying probe test is an electrical testing method that uses probes to replace pin beds for electrical testing of PCBAs.

Working Principle:
Flying probe testing machines utilize multiple electrically conductive probes driven by motors that can quickly move to make contact with device pins and perform electrical measurements. This method does not require the creation of specialized test fixtures and is suitable for testing small batches and prototypes.

Advantages:
The flying probe test saves on testing costs, eliminates the need for fabricating test fixtures, and improves shipment efficiency.