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DM385SDI输入HDMI环出能正常显示,但是LCD屏幕没有图象输出



DM385SDI输入HDMI环出能正常显示,但是LCD屏幕没有图象输出,量了屏幕的时钟,是51.5MHZ,正常的是27MHZ,请问应该该什么地方调整时钟频率?