Inspection, Programming & Functional Testing

Built-in Confidence for Every PCB Assembly

Whilst reliable PCB assembly is achieved through carefully controlled manufacturing processes and systems, it also requires disciplined inspection and testing processes that verify performance, ensure compliance and remove risk before assemblies reach your line. As a UK contract electronics manufacturer, we take a structured, methodical approach to inspection and test, giving customers confidence that every unit has been checked, verified and signed off to a consistent standard.

Our inspection capability ensures stable product quality, reduced rework, predictable downstream flow and long-term reliability in the field. It’s about protecting your production environment and delivering electronics made effortless through certainty and clarity.

Automated Optical Inspection (AOI) for Every Surface Mount Technology (SMT) Assembly

All SMT assemblies pass through our Aleader AOI system, providing comprehensive placement and solderability verification at high speed. AOI verifies:

  • Placement accuracy
  • Correct rotation of polarised devices
  • Solder fillet acceptability
  • No bridging or opens

This automated checking ensures consistency of inspection in high-density assemblies and reduces the possibility of human error compared to manual inspection methods.

Electronics Testing

Ball Grid Arrays (BGA) Inspection

For packages that cannot be readily assessed visually from above, we offer additional inspection methods:

  • ErsaScope optical inspection for underneath BGA devices
  • X-ray inspection service, available where required

These tools can verify the integrity of solder joints on complex or hidden-footprint components, supporting long-term field performance.

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Plated Through-Hole (PTH) Inspection

Through-hole inspection is supported by our Yestech comparator system, providing the inspector assistance with rapid verification of:

  • Component orientation
  • Device values
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Manual Inspection to IPC Standards

Alongside automated tools, our experienced inspection team carries out manual checks and visual verification in line with IPC workmanship standards. This combination of automated and human review ensures:

  • High-quality joints
  • Accurate component placement
  • Compliance with specification
  • Consistency across repeat builds

It adds a final layer of assurance across mixed technology assemblies, and offers a more subjective view of an assembly that machines can sometimes struggle with.

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Device Programming

We support a wide range of programming requirements.

  • On-board, with a selection of different Manufacturers’ in-circuit debuggers
  • Off-board volume programming prior to assembly through one of our partners
  • Off-board at lower volumes for devices supported by our Dataman 48LV
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Collaborative Functional Testing Approach

Whilst product-specific test equipment is customer supplied, we encourage a joint approach to testing, providing feedback and ensuring your product’s requirements are fully understood and correctly implemented. Whether you already have a mature test strategy or need support adapting procedures for production, we work with you to strengthen reliability and reduce downstream issues.

This collaboration helps ensure smoother operations, reduced rework, fewer field returns and more predictable product performance.

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Frequently Asked Questions

How do You Inspect a PCB Board?

PCB assemblies are inspected using a combination of visual inspection, Automated Optical Inspection (AOI), functional testing and comparison against manufacturing documentation and specifications to verify correct assembly and performance.

What is meant by Optical Inspection?

Optical inspection uses cameras and imaging systems, or trained inspectors, to examine a PCB assembly and identify defects such as missing components, incorrect orientation, solder bridges or placement errors.

How Does AOI Work?

AOI (Automated Optical Inspection) uses high-resolution cameras and image-processing software to compare an assembled PCB against predefined manufacturing criteria. Any deviations, such as missing components, alignment errors or solder defects, are automatically flagged for review.

What protective coating is applied on a PCB?

PCBs can be protected using conformal coatings, which form a thin protective layer over the assembly to help protect against moisture, dust, chemicals and environmental contamination. Common coating materials include acrylic, silicone, polyurethane (PU) and epoxy.

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Testing that supports predictable production

By combining automated inspection, optical analysis, functional test and collaborative engineering support, we give customers confidence that your assemblies arrive fully verified and ready for integration.

Electronics made effortless — through inspection and testing that remove uncertainty.

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