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故障现象GW－500型彩色显示器有光栅，但满屏白光栅，显示时出现行扭。分析检修先检查KI电源，测各组输出电压均正常。接着检查KZ电源，当显示字符时，输出电压正常，约为90V；当显示屏亮白图形时，出现行扭，此时电源电压上下波动。说明脉冲变压器供给负载的功率不够，也就是?
Fault phenomenon GW-500-type color display with raster, but the full screen white raster display twisted line appears. Analysis and Inspection First check KI power supply, measured the output voltage of each group are normal. Then check the KZ power supply, when the display characters, the output voltage is normal, about 90V; when the screen bright white graphics, there twisting line, then the power supply voltage fluctuations. Description pulse transformer power supply load is not enough, that is?