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(2)检修亮度、色度处理电路故障检修程序亮度、色度处理电路出现故障一般表现为:①缺少亮度信号;②光栅暗;③无彩色。①缺少亮度信号,说明亮度信号处理电路存在故障,检查亮度信号处理电路,可以按照下面的程序进行(见图23)。③彩色解码电路存在故障,一般会引起无彩色现象。检查
(2) maintenance of brightness, chrominance processing circuit troubleshooting procedures brightness, chrominance processing circuit failure generally as follows: ① lack of brightness signal; ② grating dark; ③ no color. ① lack of brightness signal, indicating the brightness of the signal processing circuit failure, check the brightness signal processing circuit, you can follow the procedure (Figure 23). ③ color decoding circuit failure, usually cause no color phenomenon. an examination