Limitations
While in-circuit test is a very powerful tool for testing PCBs, it has these limitations:
- Parallel components can only be tested as one component if the component is same, but different component in parallel connection sometimes can be tested for each component in different testing method
- Electrolytic components can be tested for polarity only on specific configuration (e.g. if not parallel connected to power rails) or with specific sensor
- The quality of electrical contacts can not be tested
- It is only as good as the design of the PCB. If no test access has been provided by the PCB designer then some tests will not be possible. See Design For Test guidelines.
Read more about this topic: In-circuit Test
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