Perhaps there was damage by a shipping clerk who ignored an ESD protocol? It showed neither what drove the failed part nor what the part needed to drive. Without that data, QA is forced to guess about the "scene of the crime.". The list of possible factors seemed endless. For ion analysis, nothing compares to a Thermo Scientific Dionex ion chromatography (IC) system. My Company Name Troubleshooting analog input modules: Instead of monitoring the on/off status of an input, analog inputs measure the actual value of a voltage or current and communicate it to the processor. Was it reasonable to expect QA to exhaustibly test every parameter over all conditions, especially when we knew nothing specific about the failure? Injector and Injection Solvents The injector rapidly introduces the sample into the system with minimal disruption of the solvent flow. This project is blacklisted. Otherwise, proceed to Step 3. Were the grounds separated correctly? Was it an infant failure or was it damaged by external handling? It showed neither what drove the failed part nor what the part needed to drive. The FA is not the first task. About two months later we learned almost by accident that the customer experienced this failure only when the part was heated above +60°C. In the application environment? There are two lessons from this. Troubleshooting Tips . A simple thing like a solder splash may be the key to the answer. The part was perfect. What caused the problems? “Perception is reality,” we have heard this often. We were back to guessing, not fact checking—hardly a prescription for a meaningful FA. Noisy supplies need to be paired with a noisy ground and clean or quiet supply must be paired with clean power. They wanted an FA, but where was the failure data? Solution 2: If it is plugged into an outlet, make sure it is a working outlet. I've heard that "an FA is always the first thing to be done. We ran it on the automatic test equipment (ATE), and bench tested, X-rayed, and decapped the part. Timely and effective IC troubleshooting is only possible when precise technical information about an IC failure is available from the customer. Review the list below and select an icon to take you to that tip. We ran it on the automatic test equipment (ATE), bench tested, x-rayed, and decapped the part. The local FAE became more closely involved with the customer on this failure issue. A part was returned as a failure and we knew nothing else. For an effective FA, we need to check a customer's schematic diagram and gather all the circumstances, the reasons, for the failure. This is also a situation where FAEs serve as the factory's eyes and ears on the ground all over the world. These best practices are providing color coded channels, labeling the channels on the schematic, providing a visual voltage scale and timescale, also zooming into the point of interest along with zooming out of the point of interest. Just select your preferences below, and start your free email subscriptions today. Without more specific performance data you are guessing. I hope the following tips help you solve the problems you will encounter in the electronic field: NEVER WORK ALONE Burn Smell This smell is unique. There may be times when you experience issues with Canvas due to a problem with a device or program. Many times a failed IC is so damaged that the origin of the damage cannot be determined. In this case the customer had concentrated on three pins of a multi-output device. Use DC ammeter, light bulb and Flickering method to isolate power supply problems thus speeding up the repair process. 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