What should I do if the multimeter can't handle troubleshooting?

When troubleshooting, a multimeter is often the first choice for electrical engineers. Many experienced engineers have developed various 'advanced techniques' for multimeters to help solve various problems encountered in their work.

However, some elusive intermittent faults are very difficult to capture, and using a multimeter usually shows normal readings. In such cases, Xiao Fu recommends using the Fluke 120B series oscilloscope with recording capabilities for quick troubleshooting.

Today, we will take "DC power troubleshooting" as an example to introduce how to use an oscilloscope for quick troubleshooting:

When a DC power supply fails, we first need to quickly determine whether the problem comes from the power supply side, the input side, or the load side.

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