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彩色电视机是一个比较复杂的电子仪器,因此为了更好的完成性能指标在各部分采用了各种保护措施。其中有电源的过压保护和过流保护、有行扫描电路的X射线保护、有场输出级和伴音功放级的温度保护及其他的保护电路。这些保护电路对不同的电视机都有各自的特点。过压保护过程又经常和X射线防护电路联系在一起。因开关稳压电源电压过高,会使行逆程电压过高,使荧光屏幅射出的X射线过强。在显像管高压为
Color TV is a relatively complex electronic equipment, so in order to better complete the performance indicators in various parts of the use of a variety of protective measures. Among them are over-voltage protection and over-current protection of power supply, X-ray protection of line scan circuit, temperature protection of field output stage and sound power amplifier stage, and other protection circuits. These protective circuits have their own characteristics for different TV sets. Overvoltage protection is often linked to X-ray protection circuits. Due to the switching regulator supply voltage is too high, will make the line reverse voltage is too high, so that the fluorescence screen X-ray radiation is too strong. High pressure in the CRT is