| 测加速极G2电压为OV，挑开该极对地电容C508，故障依旧，怀疑CRT坏。挑开管座G2脚，G2电压马上回升至290V，说明CRT已坏。彩管为永新管，怀疑是管内掉进渣后短路，用表笔按压管座G2脚与线路板铜箔，其接触时断时连。反复几次，G2电压恢复正常，再焊好G2脚，图像明亮鲜艳。 |
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