PCB Testing FAQs
5. Frequently Asked Questions (Because We Know You Have Them)
Still scratching your head about PCB testing? Here are some common questions to help clear things up.
Q: How often should I test my PCB?
A: Ideally, you should test your PCB at multiple stages of the development process, including after design, after assembly, and during operation. This allows you to catch problems early on and prevent them from escalating.
Q: What is “bed-of-nails” testing?
A: Bed-of-nails testing, or In-Circuit Testing (ICT), uses a fixture with an array of spring-loaded pins to make contact with specific test points on the PCB. This allows for automated testing of individual components and circuits without needing to physically probe each point manually. It’s very efficient for high-volume manufacturing.
Q: Can I test a PCB without any specialized equipment?
A: Yes, you can perform basic testing with just a multimeter and a keen eye. Visual inspection and continuity testing can help identify many common problems. However, more advanced testing often requires specialized equipment like an oscilloscope or logic analyzer.
Q: What’s the most common mistake people make when testing PCBs?
A: One of the most common mistakes is rushing the process. Thorough testing takes time and patience. Another common mistake is neglecting to consult the datasheet or schematic. Understanding the circuit’s intended behavior is crucial for effective troubleshooting.