How to Troubleshoot a Circuit Board With a Multimeter

Multimeters can be beneficial in fixing devices when collaborating with motherboards. Even if you do not have an electric schematic of the circuit card, which would certainly determine elements and also offer you the voltage, as well as resistor worths that must exist, lots of motherboards, have examination factors that are plainly classified.

Make use of a multimeter on this examination indicate see if the voltage determined matches the labeled examination factor voltage. If they coincide, it will certainly offer you self-confidence that the circuit card is running typically.

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Guidelines of Use Multimeter on Board for Engineers

There are six steps for engineers to use multimeters on circuit boards as following.

1. 1. Plugin your multimeter probes into your multimeter, ensuring you observe the right polarity. The red multimeter probe is the favorable probe and also has a banana jack at the end of the probe cord. Connect the banana jack right into the red multimeter plug. Put the black probe banana jack right into the black multimeter plug.
2. 2. Select your multimeter feature to determine voltage or resistance by transforming the feature handle or picking a feature switch. If you're the most likely to determine voltage, such as gauging the power that is provided to the motherboard, pick either a rotating present (A/C) or straight present (DC) voltage. The electric schematic of the circuit card will certainly inform you which sort of voltage exists.
3. 3. Disconnect the electric gadget that the circuit card belongs to. Get rid of any type of real estate on the tool in order to get to the circuit card. Making use of care not to touch any one of the electric parts or circuitry, connect the electric gadget in and also transform it on.
4. 4. Touch the multimeter probes to the motherboard examination factors if you're determining voltage. Maintain your hands on the plastic remedy of the probes so you do not obtain surprised. The red probe most likely to the examination factor as well as the black probe most likely to ground or typical. If you're gauging the resistance of resistors, link one probe per end of the resistor.
5. 5. Review the multimeter screen for the voltage or resistance dimension.
6. 6. After figuring out the voltage or resistance, eliminate the probes and also jot down the worth. Carry on to the following examination factor or resistor as well as repeat the dimension. After you have actually made all your dimensions switch off the electric tool as well as the multimeter. Eliminate the power from the electric gadget and also placed the real estate back on.