Connectors are used to attach other circuit boards or to attach the board to a larger system or outside components. Then try to identify any batteries or transistors. Other easy-to-identify components include oscillators (cylinders or boxes typically marked with X or Y), transformers (T), diodes (D), and relays (marked as K). The symbol for an ohm is the Greek letter Omega, which looks like this: Ω. These will usually have an ohm measurement mark. Then look for resistors and potentiometers. Don’t worry, we’ll have pictures later in this post. Next, identify passive components like capacitors and inductors. AX Control This GE DS200DMCBG1ABB PCB functions as a DOS Main Control Board, or DMCB. Daughterboard: an expansion PCB that attaches to a motherboard to access the CPU and memory. Motherboard: a PCB with principal components and connectors for other PCBs to be mounted. They can help you figure out the board application. For example, the DMCB board pictured below is a DOS Main Control Board for a GE Mark V system. What is it used for? Is it a motherboard, a daughterboard, or does it perform a particular task? Some boards are marked with codes that will help with this process. Identify Board Useįirst, try to identify the entire board. Like most things in life, identifying components becomes easier when you break the task down into smaller parts. Solder mask: /ˈsädər mask/ a protective layer of liquid photo imagable lacquer that has been applied to the top and bottom of PCBs to protect copper from oxidation and dust. The green solder casts a tint on the glass pieces protecting it. Solder protects the copper circuits and prevents short circuits. Why are PCBs green? That’s actually the solder mask showing up through the fibreglass core of the board. These copper circuits, also known as signal traces, electrically connect and mechanically support other mounted components on the board. Substrate: /ˈsəbˌstrāt/ an underlying substance or layer. This non-conductive substrate sandwiches copper circuitry that actually makes up the circuits the boards are named after. Printed circuit boards are typically made from laminated composite material. Here’s our printed circuit board component tutorial, with lots of information and pictures to help you identify those individual parts. And many of the best aren’t even available online anymore unless you know how to use some special tools (Wayback Machine to the rescue!)īut rather than complain about this state of affairs, we decided to create our own tutorial to fix it. Luckily, there are resources that can help. After working with thousands of PCBs, we understand. If you’ve ever tried to work on your own PCBs, or printed circuit boards, you may have experienced the frustration of looking at a part and not knowing exactly what it is. It can be hard to identify all the components on printed circuit boards (PCBs).
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