Some transistors have the leads labelled for easy identification. Look out for the base, Collector, and emitter leads of the transistor you are testing. Ensure you use a screwdriver insulated at the end where you are holding to avoid cutting off the stored power. Ensure there is no power on the board and then touch both terminals on a capacitor simultaneously with a metal. After that, unplug the AVC power cord and remove the battery. Here is a step-by-step guide on testing a transistor on a circuit board.Įnsure there is no power flowing in the circuit when testing the transistor by switching it off. Before you begin the process, make sure you know what you are supposed to do. That is why it is essential to test them to ensure they are functioning as expected. If they are faulty, they cause the failure of the circuit. Transistors perform an essential role in circuits, and it is vital to be sure they are working. How to Test a Transistor on a Circuit Board It would be best if you positioned the transistor making sure the line coming out is facing the left side.Įnsure you identify the triangle's position and point it out because the NPN collector will be pointing up while the PNP collector will be pointing down. In case the line is missing, then the metal housing is the one that acts as the base. Use the line coming out of the left as the base unless the transistor does not have that line. Look for, and a line and an arrow pointing from the end of a triangle or the sides and a line underneath that seem to connect them. Begin by finding the marking near the transistor or below it. Testing the transistors is important because you can tell whether it will help you or not. Here is a step-by-step guide on reading the transistor on a circuit board. After you know how to read them, the next thing you need to learn is how to test them. The first step is to learn about the transistors and to know how to read a transistor circuit board. Transistors are created in different styles, and they are all different, with PNP and NPN being the most common types. How to Read Transistors on a Circuit Board It will be easy for you to learn the entire transistor and the different types if you understand the NPN. ![]() ![]() ![]() It is always essential for any beginner to start by learning about the NPN because they are the easiest to understand. The most common transistors are NPN made from silicon, being the easiest to make. The transistors are made from semiconductor materials, and each of the two has different kinds of layers. Transistors are in two different types that are NPN and PNP, each with different circuit symbols. Their primary purpose is to either amplify or switch the specific amount of electronic signals moving through a circuit board. That means they are the ones that start and stop the flow of electric current. Transistors are pieces of equipment that manage the movement of electrons and, as a result, also control electricity. Knowing how to test a transistor circuit board is essential before you buy one. Before you understand how a circuit board transistor works, you need to know the transistor itself and what you need to look for when making your choice.
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