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故障现象:光栅暗,行不同步,光栅水平方向重叠于中间,左右两侧为“黑屏”。故障分析:故障现象说明行输出级输出的行扫描脉冲幅度小且频率不对。故障原因有两个:一个是行扫描电路工作电压低;另一个是行振荡电路有问题。
Symptoms: dark raster, the line is not synchronized, the raster horizontal overlap in the middle, left and right sides of the “black screen ”. Failure Analysis: Failure phenomenon line output output line scan pulse amplitude is small and the wrong frequency. There are two reasons for the failure: one is the line scan circuit voltage is low; the other is the line oscillation circuit problems.