Fixing issues is vital for the utilization of electronic devices, that is why one must know how to troubleshoot a circuit board with a multimeter. While using electronic devices, the issue of repair might come up, to properly fix the issue, the root cause has to be identified.
To identify the root cause and how to solve it, the circuit board that controls the functionality of any electronic device has to be examined through troubleshooting using a multimeter.
The Best Ways on How to Troubleshoot a circuit board with a Multimeter
A multimeter aids the measurement of electrical voltage, current, and resistance, that is why it is useful for troubleshooting. Since troubleshooting detects issues and finds ways to solve them, the multimeter used for a circuit board is apt.
Basic tools we should have to test and fix a circuit board:
Follow the below processes and see that troubleshooting on a circuit board with the use of a multimeter is easy.
1. Ensure you have a Working Multimeter
Since you will be troubleshooting with the aid of a Multimeter, ensure that your testing instrument is in the right shape, and can perform the function you want from it. Correctly Plug in the Probes of the multimeter into the multimeter.
Endure that the probes match the hole. That is the red probe for the red hole and the black probe for the black hole. Since electricity is sometimes called the city of danger, it is best to follow instructions.
After ensuring the right state, you can proceed into connecting to your circuit board.
2. Dismantle Electronic Device to lead you to the Circuit Board.
The circuit board only becomes visible after you have dismantled the electronic device. While trying to reach the circuit apply care to disallow ruining the wires in the electrical device.
After dismantling, first, connect the circuit board’s device to power before turning it on. This is just a precautionary method.
3. Run a Voltage Check
While troubleshooting, quickly checks to see if there is the flow of voltage in the circuit board, check the amount, and see if it tallies with the maker’s requirement of flow. You can check either the Alternative or direct circuit using the probes.
Proceed to check the resistance whether it is existent or not in the circuit board, this will lead you into finding the faults of the circuit board. While running these checks, the red probe and black probe will be the part of the multimeter to be used; turn the knob to the function you want it to perform.
Avoid holding the metal area; hold the plastic area, to avoid electric shock.
The red probe signifies the testing points. It is the red probe that will connect your circuit board and give a report of the state of the circuit board.
Take, for instance, the red probe is connected, and used appropriately on the switch of a circuit board, and the result on the meter comes out as zero, it will be analyzed that the switch is in good working condition.
This will lead us to the next process
4. Record and Analyze Values
The digital multimeter was meant for giving value with ease. It is your analysis that will determine you detecting or solving issues on the circuit board.
After getting results, make sure they are accurate, then record the value. Use the testing point which is the red probe to keep measuring the different parts of the circuit board to ascertain an issue; measure for the resistance, for batteries, switch, cable, etc.
After measuring and recording, turn off your electrical multimeter, and cease power from the device housing the circuit board.
5. Analyse the Problem, and Find a Fix
This is when troubleshooting happens. The result you acquired will assist you in detecting a problem, and how to fix them.
Using the test for a fuse on the circuit board for instance, when the multimeter probe is connected to the fuse, and the knob on the multimeter is turned to the resistance, and the meter indicates zero, it means the fuse is still in good condition, but the meter reads both zero and infinite, It means the circuit board needs a new fuse.
Another instance is that of checking the functionality of a cable, you will use the probe to connect the multimeter to the circuit board, while you direct the knob on the multimeter to the signal of the resistor, of the result shows zero, it means the cable is in a good condition, but if it shows zero and infinite simultaneously, it means the continuity cable needs a fix.
DIY Steps to Troubleshooting a Transistor
Most times, the transistors are always in good condition and don’t need constant repair like other components on the circuit board, this is sometimes not easy and quick to repair. The transistor is an active component on the circuit board that improves the electrical supply of current.
If it stops performing its function, it becomes hazardous as there can be either excess or shortage of current.
Although, some transistors have an inbuilt testing function. The DIY instructions will be for the Junction Field Effect Transistor and the Bipolar Junction Transistor Testing.
DIY processes for a Bipolar Junction Transistor Testing
This transistor test requires the use of solely the multimeter. The processes involve:
1. Disengage transistor from the Circuit:
The transistor, if it isn’t inbuilt, will have to be disengaged from the circuit board to allow access to it. To disengage, use a needle nose plier and carefully remove it in a way that the other components on the circuit board wouldn’t get damaged. As earlier stated, first connect the electronic
2. Connect Transistor to the Multimeter:
The type of transistor determines the placement of the multimeter red or black probe. If you are using an NPN transistor, the base terminal will be the carrier of the red multimeter probe, while the collector terminal will be the carrier of the black probe.
Remember to turn the knob on the multimeter to the diode test point.
On the other hand, if you are using the PNP transistor type, it is vice versa. The red probe will be placed on the collector terminal and the black probe on the base terminal.
3 Record Value and Analyze:
After placing correctly the red and black probes on the terminals, when the multimeter is set to the diode point, if the multimeter reads fail, detach the probes from the terminals, and immediately replace the transistor before continuing your connectivity while troubleshooting.
Meanwhile, when the meter shows pass, it implies that the transistor is still in good working condition, and you can continue with your testing.
DIY processes for troubleshooting the Junction Field Effect Transistor
The Junction Field Effect Transistor requires the attachment of a resistor of about 1,000 Ohms to the multimeter to make the troubleshooting of the transistor possible. The processes are similar with the Bipolar Junction Transistor Testing, the difference is the use of the resistor to the multimeter.
However, the following are the processes to troubleshoot a Joint Effect Field Effect Transistor:
1. Detach Transistor from circuit board:
As earlier stated, disengage the transistor from the Circuit board using a needle nose flier to give access to the transistor, and allow for the correctness of value. When you, connect the device of the circuit board, before turning on the electricity.
2. Connect Resistor:
The resistor has to be connected with the terminal, twist the lead from the resistor to the drain terminal on the transistor and twist another lead from the second resistor to the source of the terminal, then connect the free leads from both resistors to the gate terminal of the transistor.
3. Turn on Multimeter Set, Connect to the Resistor:
Turn on the multimeter and ensure it is on the Diode test point, then place the black multimeter probe on the drain terminal, and the red probe on the gate terminal; this will connect the transistor I the multimeter.
4. Record and Analyze Value:
The next process is to take down your value and analyze it immediately. If the Junction Field Effect Transistor brings a Pass result on the meter, it means it is in a good condition, and if it shows otherwise, that is, if the meter shows fail, it simply means there has to be a replacement.
What it all entails; my Verdict
These processes make it easy to troubleshoot any component on the circuit board and allows for easy engineering of electronic devices.
Although, the usage of the multimeter for troubleshooting isn’t possible without having basic knowledge of electronics, and how it works. This implies that one has to possess the general knowledge of the parts and functionality of a circuit board, and how to analyze results derived from the multimeter to finalize the process of troubleshooting.
Here is a link to a YouTube video to elaborate:
Just so you know, others have questions that rovers in their mind about troubleshooting a circuit board using a multimeter.
Frequently Asked Questions (FAQs) about how to troubleshoot a circuit board with a multimeter
Is a multimeter very effective for troubleshooting a circuit board?
Answers: a multimeter is a reliable instrument that aids in troubleshooting a circuit board, all you need is proper knowledge of electronics and its engineering to process the information acquired.
My circuit board needs troubleshooting, how do I use a multimeter to do that?
Answer: Know the components on the circuit board, simply follow instructions on how to use the multimeter, that is, know the appropriate place to fix the red or black probes, understand the meaning of the result from the multimeter. and detect problems.
Does Multimeter enhance troubleshooting a circuit board?
Answer: With the apex of technology, a multimeter is superb with the accuracy of results while troubleshooting. The instrument enhances troubleshooting your circuit board as it is accurate and can easily be used.
How to check if my circuit board needs repair
Answer: If you have noticed a malfunction in your electronic device, simply dismantle to have access to your circuit board and use your multimeter to troubleshoot the components of the circuit board, thereafter, fix the problem.
Is it risky to use a digital multimeter to troubleshoot my circuit board?
Answer: There is no risk attached to using a digital multimeter to troubleshoot. It is only important that while handling electricity, you take precautionary measures to avoid bad incidence. For example, connect the electronic device before working on your circuit board.
Can a Multimeter troubleshoot my circuit board?
Answer: A multimeter was made for this purpose. When using an electronic device or trying to engineer, a multimeter is a core instrument for troubleshooting, it clarifies and tells you the exact condition of the components in a circuit board.
This will ascertain the workability of the device by giving the accurate condition of components in the circuit board. So you can be certain that with a multimeter, troubleshooting is possible on the circuit board and a great instrument for engineering electronic devices.
How do I detect the familiar problems in a circuit board?
Answer: To effectively detect problems on the circuit board, you need to connect your red and black multimeter probes to the components of the circuit board you intend to check, you test through the red probe, following instructions on the multimeter usage and other electricity precautionary measures to avoid work accidents.
Also, record your value, so that you can define the problem and find an accurate fix to it. You need the know-how of the multimeter results analysis.
What is the best way to Troubleshooting your multimeter?
Answer: The multimeter is better used by following the instructions of using the instrument, and the connection with the circuit board. Inclusive is the immediate record of value that the multimeter gives you while testing on your circuit board so that your analysis can be exact as well.
How do you maintain a faulty electronic device?
Answer: Since the circuit board of an electronic device affects its functionality, the first thing to do is to troubleshoot using a millimeter to detect the exact problem and enable fixing it.
I just engineered an electronic device, how do I check if it is in a good condition or not?
Answer: This is very easy, simply use the multimeter instrument to troubleshoot the circuit board of the device, this will tell you exactly which component is faulty, the degree of wellness, and which is in good condition. This gives assurance to you that your device is in the right working condition.