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彩电光栅正常,接收PAL制信号时,图像闪烁:图像在正常与无光之间交替闪烁,闪烁间隔约为0.5s,即彩电以每秒一个节拍的速度闪动地出现图像。而当接收NTSC制或SECAM制信号时正常。但当进入I2C总线把Y/C(亮度/色度)由“1”设置为“0”(即关闭梳状滤波器)时,则图像正常,不再闪烁。这种故障称之为“图像闪烁”。这种故障应当与“图像与蓝屏交替出现”故障以及“跳台”故障区别开来。检修时应当仔细鉴别,
When the PAL signal is normal, the image flickers: the image flashes alternately between normal and non-light, and the interval between flashes is about 0.5s, that is, the color TV images flash at one beat per second. And when receiving NTSC system or SECAM signal normal. However, when entering the I2C bus to set Y / C (luminance / chrominance) from “1 ” to “0 ” (ie, the comb filter is turned off), the picture is normal and no longer blinks. This kind of fault is called “blinking image”. This kind of fault should be distinguished from the “Alternating Image and Blue Screen ” fault and “Breakout ” fault. Overhaul should be carefully identified,