In the circuit board assembly there are a lot of electronic components like transistors,capacitors, integrated circuit (IC) etc are used.When due to any reason components get defective, they need to be replaced with a new one to repair the device.
During troubleshooting it needs to identify the faulty component by doing measurement with the help of tools or visual verification.
Specifically if we talk about the capacitor because they are highly sensitive to spikes and over voltage can burnout and damage the capacitor permanently.
In this article we are going to discuss How to test capacitors to identify defective or working conditions to repair. How to test a capacitor with a multimeter or other tools to troubleshoot.
The capacitor is a component that stores energy in the form of Electric Charge and often used in electronics home appliances like air conditioning fan motors and compressors to perform a variety of functions.
The capacitors are further classified in two types, Electrolytic that is mainly used in vacuum and transistor power supplies and another is used to regulate direct current called Non Electrolytic capacitor.
How to Test a Capacitor by Digital & Analog Multimeter
How to test the capacitor without Desoldering
Now another question is how to test the capacitor without desoldering or without removing the capacitor from the circuit board.
When a capacitor is mounted In circuit board it is not possible to measure the actual rated value through the multimeter or capacitance meter because there are several other components placed in the same circuit board.Due to that capacitor gets equivalent value rather than actual.
Now again the question is again the same: how to test the capacitor without desoldering the component and if yes how it is possible.
Yes it is possible by using an equivalent series resistance (ESR) meter or smart tweezers both work fine but ESR meter more suitable for through hole components and smart tweezers for tiny SMD components. How to test capacitor without Desoldering Below 3 methods are used to identify the faulty capacitor.
2 Smart Tweezers
Smart Tweezers are more handy and Portable to do jobs more fun and comfortably.ESR Meter are not more reliable dealing with the tiny SMD component.
But the drawback of smart tweezers are that they are too costly otherwise they work very smart and effectively.(Smart Tweezer (Amazon link)
3 Visual inspection for Bad Capacitor
Sometimes you can check the capacitor by visual inception rather than using the smart tweezers or ESR meter easily.
A faulty capacitor gets swallowed on top side and gets some damage or burnt remarks on the body.If you find such observations during inspection then replace the suspected capacitor for fresh.
Now you will get the answer of the query for how to test a capacitor in both conditions removing from circuit board or with circuit board.
Faulty capacitors can be identified by digital multimeters, ESR meter and also usage of smart tweezers.how to test a capacitor with a multimeter in a circuit answer is ESR meter and smart tweezers.
tags- how to test a capacitor with a multimeter ,how to test the capacitor,how to test a capacitor with multimeter,how to test a capacitor without a multimeter,how to test the capacitor