Power transformerIn daily life, all kinds of household appliances use different voltages. It is necessary to use low-voltage DC power supply to work in household electrical appliances. The 220V AC power is converted to low-voltage AC power by power transformer, and then rectified by diode and filter

Intermediate frequency transformerIf the transformer is mainly used in radio frequency selection and interstage coupling. Frequency selection refers to the selection of useful signal frequencies among many signals and the transmission of functional signals. In AM radios, 465kHz useful signals are se

1. Replace new components. 2. The external connection of the capacitor is short-circuitd, check the short-circuit point and disconnect.

1. Unelectrified, breakdown, short circuit inside capacitor. 2. Normal power supply, breakdown after electrification, short circuit of the external connection of the capacitor.

1. The internal circuit of the capacitor is open, the components are changed; the external connection of the capacitor is open, and the welding is done again. 2.Capacitor breakdown, new. 3.Capacitor leakage and replacement. 4.Breakdown after electrification and replace it.

After electrification breakdownCapacitor plus working voltage breakdown, after the power off it is shown as non-breakdown, multimeter detection it does not show the characteristics of breakdown, the DC voltage at the two ends of the measuring capacitor is zero or very low under the condition of elec

Component leakageWhen the capacitor is leaking, the insulation performance between the two poles of the capacitor is decreased, the leakage resistance exists between the two poles, there is a DC current passing through the capacitor, the straightness of the capacitor becomes worse, and the capacity

Component breakdownAfter the capacitor breakdown, the function of the capacitor is lost, the path is between the two pins of the capacitor, the direct action of the capacitor disappears and the DC circuit of the circuit is broken down, thus affecting the AC working state.

Component open circuitAfter the capacitor is open, there is no function of the capacitor. After the capacitor in different circuits has an open circuit fault, the specific fault phenomenon of the circuit is different. For example, the AC sound appears after the filter capacitor is open, the coupling

Shell deformationBecause the dielectric inside the capacitor is dissociated under the action of the high voltage electric field, the medium will decompose and precipitate gas, or because of the breakdown of some components, the discharge of the capacitor pole to the shell will cause the medium to pr