液晶显示器高压板电路典型故障的判断与调测

更新时间：2020-07-21 05:34:55 大小：1M 上传用户：守着阳光1985 查看TA发布的资源 标签：液晶显示器 下载积分：5分评价赚积分（如何评价?）收藏评论(0) 举报

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液晶显示器高压板电路主要由驱动控制电路（振荡器、调制器）、直流变换电路、Royer结构驱动电路、液晶显示器高压板电压和电流检测电路、CCFL等组成。在实际的高压板中,常将振荡器、调制器、保护电路集成在一起,组成一块小型集成电路,一般称为PWM控制芯片。高压电源板负责给LCD的灯管供电,它将直流低压电源变换为高频高压电源以点亮灯管,属于功率变换器件,易发热,所以比较容易坏。本文主要介绍了液晶显示器内部的高压板电路的作用,分析了高压板电路典型故障的判断与调测的方法。

Liquid crystal displays high-voltage plate circuit is mainly composed of the drive control circuit （oscillator, modulator）. DC converter circuit. Royer drive circuit, the structure of liquid crystal displays high-voltage plate vohage and current detection circuit, CCFL etc.. In the pressure plate,the oscillator, modulator, protection circuit are integrated together, formed a small integrated circuit,commonly known as the PWM control chip. High vohage power supply board is responsible for supplying power to lamps LCD, It will transform the DC low voltage power supply for high frequency and high voltage power supply to light the lamp tube, It belongs to the power device, easy to heat, so it is easy to bad. Th...