How To Check Resistors On A Circuit Board

- September 22, 2018

Always be aware of possible back parallel circuits when performing in circuit resistance measurements. The result should be a pcb consisting of an array of conductive pathways etched on copper sheets which works to mechanically support a larger electronic device.

Current Through Resistor In Parallel Worked Example

How To Use A Digital Multimeter To Test A Resistor It

As a repairer most of the times we want to troubleshoot and solve problems as fast as possible thus removing all resistors from the board and check the resistors one by one will take up a lot of our precious time.

How to check resistors on a circuit board. On printed circuit boards pcbs which serve as platforms for building the mass produced circuits commonly found in computers and other electronic systems you may have trouble recognizing the individual circuit componentsthats because manufacturers use fancy techniques to populate pcbs with components aiming to eke out efficiencies and save space known as real estate on the boards. A bad resistor could ultimately lead to other components of a circuit failing or the complete shut down of a circuit altogether. Use a multimeter on these test points to see if the voltage measured matches the labeled test point voltage.

Using analog meter to check resistor on board often produced an inaccurate reading. Printed circuit boards pcb components are made up of a variety of complex electrical elements including resistors capacitors diodes transistors and fuses. In order for a pcb to function properly each component must play its part.

How to test resistors. The voltages produced by the analog mater are quite high and it can trigger the semiconductor devices around the resistors circuit such as the diode scr. Analogue signature analysis to test the unpowered printed circuit boards pcbs.

Resistors present a resistance or impedance to the electrical circuit and reduce the amount of current that is allowed to flow. This is due to the reasons that the output from the analog meter probe is about 3 volt to 12 volt. Diagnosing of defective printed circuit boards pcb.

More comprehensive testing can be performed on these components when the component is removed. A test of circuit board components such as capacitors resistors transistors and integrated circuits can be done to some extent without removing the components from the circuit board. Resistors regulate the amount of current flowing in an electronic circuit.

Even if you dont have an electrical schematic of the circuit board which would identify components and give you the voltage and resistor values that should be present many circuit boards have test points that are clearly labeled. If you suspect a bad resistor is at the root of your electrical problems you can conduct a simple test with a multimeter without ever removing the resistor from the circuit. Techniques to diagnose a faulty pcb.

Before getting into details of printed circuit board there are some basics you need to know about circuits.