论文部分内容阅读
松下“三超画王”彩电采用M17机芯,其机型有TC—25GF10R/12G、TC—29GFIOR/12G、TC—33GF10、TC—43GF10(R表示未设丽音接收功能),这一系列机型的扫描速度调制VM电路和末级视频放大电路完全相同,且设计在一片视频处理板上。TC—29GF10R视频处理板序号为L—BOARD TNP107992,本文在解析视频处理板上速调、视放电路原理的基础上,介绍常见故障的检修方法。一、扫描速度调制电路 1.工作原理经微分和限幅处理的VM信号由IC 3006(AN5342K)(21)脚输出,通过接插件L4端子①加至Q
Panasonic’s “three super-king” color TV with M17 movement, the models are TC-25GF10R / 12G, TC-29GFIOR / 12G, TC-33GF10, TC-43GF10 (R said no Laiyin receiver) Model scan speed modulation VM circuit and the final video amplifier circuit identical, and designed in a video processing board. TC-29GF10R video processing board serial number is L-BOARD TNP107992, this article parses video processing board on the speed, depending on the principle of the release circuit, describes the common troubleshooting methods. First, the scanning speed modulation circuit 1. Working principle Differential signal processing and VM signal output by the IC 3006 (AN5342K) (21) feet, through the connector L4 terminal ① added to the Q