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故障现象:屏幕上部光栅拉长,下部光栅压缩。故障分析:这是场直流工作点上移使场输出管饱和导通,导致扫描正程前期压缩造成的。检修:该机场扫描电路
Symptoms: the upper grating elongated screen, the lower grating compression. Failure Analysis: This is the field DC work point up to make the field output tube saturated conduction, leading to scan the beginning of the compression caused. Overhaul: The Airport Scanning Circuit