What is a chip tantalum capacitor, including its basic structure, working principle, advantages and disadvantages, applications, causes of failure, repair methods, and current development status 4

5、 Reason for malfunction and repair method:

1. Capacitor aging: After long-term use, the electrolyte inside the surface mount tantalum capacitor will gradually evaporate, causing the capacitance value of the capacitor to decrease. At this point, it is necessary to replace the faulty capacitor.diode

Repair method: Firstly, measure the capacitance value of the capacitor through a testing instrument. If the capacitance value is detected to be below the specified range, it can be determined that the capacitor is aging. Then, remove the faulty capacitor, burn the solder with a solder extractor, use a soldering iron to extract the solder extractor, and finally solder the new capacitor onto the circuit board with a soldering iron.diode

2. Capacitor short circuit: Leakage of electrolyte inside the capacitor can cause a capacitor short circuit, thereby affecting the normal operation of the circuit.diode

Repair method: Firstly, use a testing instrument to check for a short circuit between the positive and negative terminals of the capacitor. If a short circuit is detected, the faulty capacitor needs to be removed, and then the solder should be melted using a soldering iron. The soldering iron should then be used to suck up the solder, and finally, the new capacitor should be soldered onto the circuit board using a soldering iron.diode

3. Capacitor open circuit: Poor contact between the electrodes inside the capacitor and the electrolyte, or oxidation of the electrode material, can cause the capacitor to open circuit.diode