There are a myriad of components that you could find inside a printed circuit board. For your PCB to do what they’re meant to, you have to be very attentive with the proper function of each of the components. Even if it’s just a single component that is not working properly, you could easily find your electronic device misbehaving. So before you work on your printed circuit board assembly, you need to know how you’d be testing its components.
The most significant parts of every PCB include the resistor. This is the component that has a pair of terminals for delivering electric current for producing voltage. If you want to test this component, you will need an ohmmeter. The first thing you need to do is isolate the resistor. This will allow you to get the results of the test accurately, without any signal intervention from the other PCB components. Most people would use digital multimeters for testing instead of analog meters, which provide rather less accurate results. It’s advisable that you only use any multimeter having 0.6 volts of output value or less. This will keep the other resistors surrounding it away from accidental conduct. In the case of parallel resistors, you may want to expect less accurate test results.
It’s best that you establish what the resistor’s accurate reading should be before you test your resistor. After you’re done with this step, you could then connect your multimeter test leads to your resistor to start running the test. Should the results you attain become too high, there is a possibility of a resistor either being open or acquiring higher value. In some cases, other components may be responsible for making the reading lower. This only means that higher values are indicative of a potential issue.
The capacitor is a device that serves as storage for the electrostatic field. Capacitors primarily consist of insulating materials positioned between a pair of conductive plates. In a printed circuit board, the capacitor is responsible for creating blockages to a direct current flow while enabling an indirect current flow. Whenever the capacitor receives DV voltage, electric charges are kept by every conductive plate. As the current flows, the capacitor stores energy. As soon as there is enough energy stored by the capacitor, the current will stop from flowing.
The type of the capacitor is typically indicated by the material used for insulation, which may be in the form of silver mica, ceramic, or polycarbonate. The board usually creates the capacitor, which, in order to be stable, should have metal conductive regions of alternating layers.
Testing the capacitor of a printed circuit board requires an end of this component being removed from its circuit. The capacitor’s range should be equivalent to the DC voltage power supply. This prevents the device from overloading. There are several outcomes you can attain upon the application of voltage. The meter would reflect the power supply’s output voltage should the capacitor become shorted. The reading will become high and eventually drop if leaking occurs in your capacitor, though the value should not reach zero. In the case that there is no significant change registered on the meter, there are two possibilities: capacitance is extremely low to have a result, or your capacitor is open.
There will be a lot of instances where a circuit board is made with a mistake or two. In certain cases, you may see one or more components being soldered in an incorrect position or backwards. You should, however, be able to troubleshoot the resistors and capacitors of your printed circuit board with the help of the tips mentioned above.