About Us
One - stop Printed circuit board assembly Solution provider Keep Best PCB Assembly Co., Ltd serves many well-known brand customers in industrial control, security, medical, Internet of Things, automotive, artificial intelligence, smart home, power and communications industries at home and abroad. The company continues to be customer-centric, improves the level of digital intelligence, and is committed to meeting continued high-quality customer needs.
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Finished Product Test
[KEEP BEST] Product Testing Services: Ensuring Uncompromised Quality
Agree the inspection criteria, test coverage, traceability records and acceptance authority for the released project.
Advanced Testing Technologies
AOI Automatic Optical Inspection
Leveraging optical principles combined with image analysis, computer technology, and automatic control systems, our AOI inspection efficiently identifies production-related defects on PCBs. This technology accurately screens out defective products, preventing faulty PCBs from reaching clients or proceeding to subsequent processes. It effectively detects issues such as soldering defects, component misplacement, and surface anomalies, ensuring only quality-assured boards move forward.
FAI First Article Inspection System
Our FAI system features high-precision 10-level sorting with PASS/FAIL indication and voice broadcast functionality. Equipped with serial and parallel equivalent mode selection, automatic function range adjustment, and simultaneous L-RDC testing, it streamlines the first article confirmation process. The one-key screen capture and data recording functions generate detailed first article reports, significantly enhancing verification efficiency and preventing errors at the initial production stage.
ICT (In-Circuit Test)
Based on the customer-provided PCB test plan, our ICT testing includes test points, programs, custom test fixtures, and predefined steps. This method simulates circuit input and output to measure whether electrical values meet specified standards, ensuring the functionality and connectivity of components and traces on the PCB.
X-Ray Inspection
Utilizing X-Ray technology, our inspection equipment penetrates materials of varying densities to generate contrast images, enabling non-destructive evaluation of ultra-fine pitch and high-density PCB internal structures. This allows us to detect hidden issues such as solder bridges, missing components, misalignments, and open circuits without compromising the PCB, ensuring thorough quality control.
3D Solder Paste Inspection (SPI)
Our SPI system effectively evaluates the volume, area, height, XY offset, and shape of solder paste printed on PCBA. It promptly identifies defects like missing paste, insufficient/t excessive solder, solder bridging, misalignment, shape irregularities, and board surface contamination, eliminating potential issues before assembly.
Plug-in Online Visual Inspection
Employing AOI technology, this inspection method targets the DIP (Through-Hole) process, accurately screening out defects such as wrong components, missing parts, reverse placement, extra components, and misalignments. It prevents defective PCBA from being delivered to clients or entering subsequent production stages, maintaining process integrity.
X-Ray Coating Thickness Gauge
This multifunctional instrument conducts comprehensive and precise detection and analysis of coatings, enabling us to verify surface finish thickness and quality. It plays a critical role in enhancing product reliability and optimizing production efficiency.
High and Low Temperature Tester
Agree the inspection criteria, test coverage, traceability records and acceptance authority for the released project.
PCBA Function Test
Our full-function coverage test ensures every PCBA product delivers reliable and stable performance. It verifies all specified functions, from signal transmission to component operation, to meet customer requirements and application standards.
Oscilloscope Testing
Equipped with a 4-channel, 200Mhz/1G sampling rate high-precision digital oscilloscope, we conduct detailed signal analysis for product R&D, equipment debugging, and maintenance. This tool helps identify and resolve signal integrity issues, ensuring optimal circuit performance.
Programming and Burn-In Testing
On-line and Off-line Program Programming
Agree the inspection criteria, test coverage, traceability records and acceptance authority for the released project.
FCT (Functional Circuit Test)
Aligned with the customer’s test plan, our FCT testing utilizes custom fixtures, programs, and test steps to simulate real-world circuit operation. It measures input and output parameters to verify that all functional specifications are met, providing comprehensive validation for PCB and PCBA functionality.
Commitment to Quality Assurance
At [KEEP BEST], our testing processes are designed to minimize risks and maximize product reliability. By combining advanced equipment, industry-standard methodologies, and a team of skilled professionals, we ensure that every product undergoes thorough evaluation before delivery. Our goal is to provide clients with confidence in the quality, performance, and longevity of their PCB and PCBA solutions, supporting their success in competitive markets.
For more information on our testing services or to discuss specific requirements, contact us today. Let [KEEP BEST] be your partner in delivering excellence through rigorous quality testing.
Specify inspection and functional test coverage
Inspection and product testing answer different questions. Define methods, coverage and acceptance for your board rather than assuming one check proves every requirement.
| Method to evaluate | What it can assess | Input and limit to agree |
|---|---|---|
| Optical / solder inspection | Visible placement and solder-related conditions. | Inspection criteria, accessible features and reporting; hidden joints require an appropriate method. |
| X-ray where applicable | Selected hidden-joint or internal structural conditions. | Devices / joints to inspect, criteria and records; it does not establish full electrical function. |
| Electrical / functional test | Connections or behaviour covered by the specified procedure. | Fixture, limits, firmware, interfaces and pass / fail record; untested functions remain outside coverage. |
| Programming | The agreed firmware release and programming verification. | Controlled binary, checksum / version, equipment and licensing or key-handling requirements. |
Handover and acceptance
Provide the test specification, acceptance limits, fixture responsibility and record format. Confirm where each test is executed, whether external qualification is needed and how failures, retest and rework are dispositioned.
Is there a minimum order quantity (MOQ) for product orders?
Minimum quantity and batch economics depend on the BOM, setup, testing and sourcing scope. Discuss your planned quantities with sales.
What is your testing policy and how you control the quality?
Agree the inspection and test plan for your product. Depending on the design and executing site, this may include PCB electrical checks, AOI, BGA X-ray inspection, first-article review and customer-defined functional testing. Confirm coverage and acceptance limits in the quotation.
What service do you have?
We can offer OEM service including PCBA making, PCB assembly, components sourcing. Additionally, we can also provide programming, testing, cables, enclosure assembly service.
Do you support quick proofing?
Confirm prototype timing after design review, material availability and the test plan have been checked.
Are my files safe?
Agree confidentiality terms, access permissions and the file-transfer channel with sales before sharing design files. Identify any approved partner access in the project agreement.
If we have order production needs, how can we contact you?
Request a PCBA Quote with your project stage, quantities, delivery country and test requirements. Sales will coordinate the next steps and file transfer.
