Introduction: After capacitor open a way, without the action of capacitor. The capacitor in different circuit appears after open circuit breakdown, the specific breakdown phenomenon of circuit is different. If hum appears after open a way of filter wave capacitance, wait soundlessly after coupling capacitance open a way. One, phenomenon of general capacitance breakdown: Reason of breakdown of the capacitance open a way, puncture, puncture after leakage of electricity, electrify 1, yuan after open a way of capacitor of open a way of parts of an apparatus, without the action of capacitor. The capacitor in different circuit appears after open circuit breakdown, the specific breakdown phenomenon of circuit is different. If hum appears after open a way of filter wave capacitance, wait soundlessly after coupling capacitance open a way. 2, yuan after puncture of capacitor of puncture of parts of an apparatus, lose the action of capacitor, capacitor is brought twice access is between the foot, of capacitor lie between straight action to disappear, the dc circuit of circuit appears breakdown, affect communication job position thereby. 3, yuan when leakage of electricity of capacitor of leakage of electricity of parts of an apparatus, bring about capacitor insulation property drops between two plate, block of leakage of electricity exists between two plate, dc electric current passes capacitor, of capacitor lie between straight function to become poor, the capacity of capacitor drops. When coupling capacitor leakage of electricity, will cause circuit noise big. This is the breakdown with higher occurence rate of the breakdown in small capacitor, and it is difficult that breakdown detects. 4, the puncture after capacitor of the puncture after electrify adds go to work to make voltage, after cutting off the power, it is behaved again for not puncture, when avometer detects, it does not behave the feature of puncture, electric capacity is gauged below electrify circumstance the volts d.c. of two end is 0 very low perhaps, capacitance function addle. Repair a method 1, capacitance interior open a way, change capacitance of yuan of; of parts of an apparatus the exterior open a way that connect a line, new solder is good. 2, capacitor puncture, change new. 3, capacitor leakage of electricity, change new. 4, the puncture after electrify, change new. 2, electroanalysis the overhaul of capacitor electroanalysises capacitor is one of fixed capacitor, its breakdown feature and feature of fixed capacitance breakdown have a lot of similar place, because electroanalysis the characteristic of capacitor, electroanalysis the place that the breakdown feature of capacitor has a lot of differring again. In circuit, electroanalysis the fault rate of capacitor is higher. Breakdown phenomenon: Capacitor is polar reason of short circuit breakdown 1, not electrify, puncture, capacitor interior short circuit. 2, not electrify is normal, the puncture after electrify, capacitor is exterior the short circuit that connect a line. Repair a method 1, change new yuan of parts of an apparatus. 2, capacitor is exterior the short circuit that connect a line, examine short circuit site, disconnect. CNC MillingCNC Machining