Now with the LCR meter in use, you can check any components.
Before, I didn’t check such capacitors, I couldn’t even think that they can change their capacitance. Such a loss of capacitance is typical for electrolytic capacitors.
But when repairing a small power supply unit I discovered that the capacitance of the 470nF film capacitor decreased to 280nF.
Given the tolerance of 20%, this is much more.
Can this capacitor still be considered able to work, or should it be replaced?
What are the reasons for reducing the capacitance in such capacitors?
Before, I didn’t check such capacitors, I couldn’t even think that they can change their capacitance. Such a loss of capacitance is typical for electrolytic capacitors.
But when repairing a small power supply unit I discovered that the capacitance of the 470nF film capacitor decreased to 280nF.
Given the tolerance of 20%, this is much more.
Can this capacitor still be considered able to work, or should it be replaced?
What are the reasons for reducing the capacitance in such capacitors?