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故障现象:冷开机时电视机需5～10min光栅幅度才能达到最大程度,同时还需将亮度、对比度调至最大值,电视图像才达到可视状态。但并不清晰且不
Symptoms: cold boot TV to 5 ~ 10min raster amplitude in order to achieve the maximum degree, but also need to brightness, contrast adjusted to the maximum, the television image to reach the visual state. But not clear and not