LCR Meter

Electrical Repair is No Longer Solved by a Multimeter Alone

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Electrical Repair is No Longer Solved by a Multimeter Alone

Today, I repaired a batch of servo drivers. When powered on, I measured various voltages and found no output, with some issues appearing intermittently. The chip used is the UC2842, and the supply voltage was alarmingly low. I measured the startup resistor, supply capacitor, and supply diode, all of which were normal, leading me to … Read more

Coupling Capacitor and Resistor at Oscilloscope Probe Front End

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Coupling Capacitor and Resistor at Oscilloscope Probe Front End

1. Introduction   Originally, I needed to use the front end of the oscilloscope probe to create a shielded connection, but unexpectedly, when disassembling the front end, I discovered a strange part inside. It seems there is a small capacitor within this structure. 2. Internal Structure   To minimize the impact on the circuit being measured, the … Read more