【摘要】 彩电基板的色度通道测试与调试是该基板测试与调试系统的一部分．用于流水线上的调试设备，是自动调试的前期准备．该系统也可用于彩电基板的综合测试．本文主要介绍色度通道测试的要求．基本原理和方法．色度通道白色度放大与分离，解调副载波的形成，色度信号的同步解调，消色与ＰＡＬ开关信号组成．本文对每个电路的工作特点都作了简要介绍，为后面的内容介绍时有一个整体了解．该系统由单片机测量与控制、微机处理、机电控制、测试信号及模拟信号处理、夹具等六大部分组成，文中对它们在系统中的作用作了简要说明．更多还原

【Abstract】 The chroma channal measurement and adjustment of Golden star C4717 color television baseboara is one pare of the base boara measurement and adjustment system. It will be used an assemblyline for an adjustmnt equipment. It is a earlier prepare of automatic adjustment. It will be used mul tiple measurement also.This papen introduced the desire, priciple and methode of chroma channal measarement. Thereare four parts in the chroma chnnal, such as chrominance amplification and separation, generetionof demodulation sub-carrier wave, synchro-demodulation of color diffenence signal, generetionof colour killer and PAL on-off signal. We simply introduced openating charactens of everycircuit, as a whole understand for following coments. There are micro controller measuring and con trolling, microcomputer processing, machine electric controlling, test signal and analogue signalprocessing and fixtures in this system. we simply illastrated their actions in this system.更多还原