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VCD影碟机的信号处理电路是处理音频和视频信号的电路。这部分电路发生故障往往会引起伴音或图像不良。下面我们以国内流行的VCD机为例介绍其故障的检修方法。 一、无图像无伴音的故障检查 故障现象 新科320型VCD机,装入光盘后面板上的显示正常,显示屏上的时间正常变化,但无图像无伴音。 检查方法 图1是VCD-320机的信号处理电路方框图,与图像和伴音有关的电路是A/V解码器和音频、视频信号处理
VCD player signal processing circuit is the audio and video signal processing circuit. This part of the circuit failure often cause sound or poor image. Here we take the domestic popular VCD machine as an example to introduce the troubleshooting method. First, the no image without sound fault troubleshooting Symptom New Division 320 VCD player, into the disc on the back of the display is normal, the time on the screen changes normally, but no picture without sound. Inspection method Figure 1 is a VCD-320 machine signal processing circuit block diagram, and the image and sound-related circuits are A / V decoder and audio and video signal processing