飞利浦两片机芯彩电无彩色故障检修的教学与实践

The Teaching and Practice in Overhauling Philips Double-Chipset Color TVs with No-Color Breakdown

色解码器是彩电的核心电路,色解码器损坏会出现彩电无彩色的故障现象 因此,色解码器故障的检修是《彩色电视机原理与检修》教学的重点和难点 在教学过程中以实验机型凯歌4C4705—2A型彩色电视接收机为例,详细分析了TDA3561解码器处理色度信号的过程及此类彩电无彩色故障原因和检修方法,并给出维修实例,以提高学生的维修水平.

Color decoder is the core circuit in a color TV,and the damage of the color decoder will bring about no-color breakdown.Therefore,the overhaul of broken-down color decoders in the focal and difficult part in teaching the course of Principles and overhauling of color TVs.This paper describes briefly the process of TDA3561 decoder's chrominance signals and analyses in detail the reasons and overhauling methods for no-color breakdowns of this type of color TVs with maintenance examples.