You won’t be able to see the manufacturer, but you can start looking at distributors to start searching for replacements if needed. If you have any through-hole resistors, look up a color code to read off the value of the resistor. You can put this number into a parts search engine or distributor website to find more information about this component The MPN for this Broadcom chip is BCM6358KFBG. You can then put this information into a search engine and locate more information about the component. Integrated circuits and larger radial/axial capacitors will have some markings on them that will state an MPN, component value, manufacturer, or other information. When looking at the PCBA you need to debug or reverse engineer, you can usually see component information printed directly on some components. In other cases, you won’t see any MPN on the component and you might not have documentation for the design, so you’ll be forced to try and find a replacement component. In some cases, such as with SMD passives in small packages (0201, 0402, etc.), there won’t be any way to identify the specific MPN, but you can at least take some steps to identify the value of the component. At minimum, you’ll have the information needed to identify the specific manufacturer and part number. Most electronic components will come with some information you can use to identify each component. If you find yourself in this situation, there are some online resources you can use to help you identify electronic components and find suitable replacements. Tasks like reverse engineering a design, rebuilding documentation for an old design with new components, and debugging an old product that has no documentation all require the same set of strategies for identifying components. Learning how to identify electronic components involves more than just specifying part numbers for a component you find in the lab. Sometimes, you’ll have access to some of the design documents, but other times you might just have a collection of components that need to be identified. Existing products and old designs often have a slew of components that are tough to identify just by looking at them, especially when you don’t have design documentation available for an old project. If you’re a designer who has started a new job and is just starting to dig into existing designs, then you’re probably familiar with the time required to come up to speed.
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