Capacitor damage in the power supply

Generally, capacitors are damaged in the power supply. Common capacitors include ceramic capacitors, multilayer ceramic capacitors, high-voltage capacitors, and safety capacitors. The editor has exemplified several common phenomena, and everyone can check with the editor.

1) The short and open circuit inside the capacitor is damaged. The fault phenomenon is to burn out the switch tube and other current limiting components, such as the current limiting resistor in the safety and switching power supply. The varistor may be broken down by breakdown.

2) Short capacitors and open circuit damage Safety capacitors working in high voltage and high current. When the voltage rises for some reason and exceeds the withstand voltage value, it will break through the short circuit. The safety capacitor is broken due to the large current flowing through the capacitor during a short circuit.

3) The failure caused by the disappearance of the capacitor capacity and the complete leakage are the most difficult to identify and repair after the failure of the capacitor in the power supply. Because the capacitor is measured, everything is normal with a multimeter, but after the capacitor is mounted on the circuit, the capacity of the capacitor It disappears completely. This is one of the most difficult soft faults in the circuit. That is, the components cannot withstand the voltage. When there is voltage, the capacity disappears completely.

Capacitors are inseparable from our 100% professional test before damage, in order to prevent damage to the capacitors involved in other electronic components. It is very important to see the inspection work, don't forget it.