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所有彩电中均有自动消磁电路,也称ADC电路。它是彩电电路的一个组成部分。消磁电路主要由热敏电阻、压敏电阻、消磁线圈等组成。消磁线圈一般为400匝,装在显像管锥体部分。一半在磁屏蔽罩的里面,另一半在磁屏蔽罩的外面。接通电源后,流过线圈的电流为1.25 A左右,磁场强度为500安匝左右。线圈的直流电阻约为40 Ω。自动消磁电路一般有四种基本形式:(1)正温度系数热敏电阻消磁电路;(2)正或负温度系数热敏电阻与压敏电阻混合组成的消磁电路;(3)大电容充放电衰减振荡消磁电路;(4)热动继电器消磁电路等。目前,彩
All color TV have automatic degaussing circuit, also known as ADC circuit. It is an integral part of the color TV circuit. Demagnetization circuit mainly by the thermistor, varistor, degaussing coil and other components. Degaussing coil is generally 400 turns, mounted in the pyramid part of the picture tube. Half of the inside of the magnetic shield and the other half outside the magnetic shield. After turning on the power, the current flowing through the coil is about 1.25 A, and the magnetic field strength is about 500 Amps. The DC resistance of the coil is about 40 Ω. Automatic degaussing circuit generally has four basic forms: (1) positive temperature coefficient thermistor degaussing circuit; (2) positive or negative temperature coefficient thermistor and varistor mixed composition of the degaussing circuit; (3) large capacitor charge and discharge Decay oscillation degaussing circuit; (4) thermal relay degaussing circuit. Currently, color