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彩色显示器是微机系统的一个外部设备,它本身没有视频信号的产生和记忆功能,所有字符及图象信息均由主机提供。彩色显示器与彩电很类似,但又有其自身的特点:彩色显示器的扫描频率不是固定的,它是由显示方式所决定的。在彩色显示器的各种故障现象中,无光栅故障的发生率高达80％以上。而造成无光栅故障的原因很多,其主要的故障电路有:电源电路故障,行扫描电路故障,显象管电路故障等。下面结合故障现象作具体的分析。
Color display is an external device of the computer system. There is no video signal generation and memory function in itself. All character and image information are provided by the host computer. Color monitors and color TV is very similar, but has its own characteristics: color monitor scanning frequency is not fixed, it is determined by the display mode. In the various symptoms of color displays, the incidence of non-grating failure as high as 80%. There are many reasons for the failure of the optical barrier. The main fault circuits are: power supply circuit fault, line scan circuit fault, kinescope circuit fault, and the like. The following combination of symptoms for a specific analysis.