Benefit from the knowledge and expertise of qualified test technicians and engineers who are well versed in flying probe and in-circuit testing, in addition to being able to implement customer functional test solutions, complemented by conventional bench test equipment and XTJAG boundary scan.

Flying probe testing

Flying probe testing is a popular solution for manufacturers working with smaller batch sizes. It is also frequently used when fixed test probe access is limited or impractical. A proven method of electronics manufacturing defect detection and prevention, flying probe testing also eliminates the requirement for dedicated fixturing. 

Flying probe testing uses a set of precision moveable test probes that directly access test points, vias, component pads, circuit interconnections and fine pitch parts. This means the technique is able to replace the need for a mechanical test fixture while also achieving test coverage similar that exhibited by in-circuit test (ICT).

  • Initial test program creation is fast & direct from CAD files
  • Removes need for bed-of-nails test fixture
  • Enables easy inspection of any PCB assembly
  • Ideal for low & medium volumes in addition to high board mix prototype applications

In-circuit test

in-circuit-testAlthough relatively uncommon in small to medium volume manufacturing, JJS offers full on-site in-circuit test, both analogue and digital, with vector-less test. Test fixtures and programmes are also produced on-site. For slightly larger volumes ICT is invaluable as a pre-cursor to functional test, reducing debug time and significantly increasing functional test yield.

Boundary scan

Boundary scan test is renowned as an extremely rapid test method, equipping manufacturers to debug and programme complex digital circuits. Our team uses cutting edge technologies from the likes of X-JTAG to deliver powerful Boundary Scan solutions. 

Ideal for testing boards populated with complex ICs, boundary scan processes deliver in-circuit levels of test coverage and diagnostics. Access purely from the board edge, this is an extremely useful and non-intrusive test technology. In addition, most modern devices feature bus technology which effectively creates thousands of test points to test components and interconnections. Boundary scan testing is the perfect way to identify structural fault locations, even beneath BGAs, without requiring mechanical access to the circuit.

JJS boundary scan benefits include:

  • Accelerate new product development
  • Reduce time-to-market
  • Fast & efficient test program generation is ideal for boards undergoing design revisions
  • Highly versatile; can be used across the board production process for design verification, in-system programming, testing & debugging

Functional test

Functional test is a core component of the majority of successful test strategies. While it is often possible to de-skill functional testing, it is also often the case that functional test makes the highest demands on a skills base in terms of diagnostics. 

We have considerable expertise in designing and delivering efficient test and diagnostic solutions. Our experienced and highly qualified test engineers can develop functional test solutions in-house, or work with those provided by our customers.

All functional PCB testing is fully supported by extensive engineering diagnostics so you can be sure that tested boards will be totally compliant with supplied specifications.

By using functional testing, our customers not only verify board functionality, but also, provide confirmation that the PCB will perform in its application environment.


testing stage

The Definitive Guide to Test: Within Electronics Manufacturing

Testing is an integral part of the manufacturing process, which ensures defects are rooted out and resolved before a product reaches its customer.

The first six months - Working in partnership with JJS