电视机原理和电视机检修实训.doc

《通信产品设计与制作综合实训》 项目技术报告 姓 名： +++ 学 号： +++++++ 班 级：++++++ 课程名称：电视机原理及电视机检修实训 提交日期： ++++++++ 概 要 本文介绍了进行黑白电视机组装机调试过程中所用到的部分知识，其中包括光学极人眼视觉特性知识、黑白电视机工作原理及原理框图，对黑白电视机各部分组成及主要作用的叙述，另外还介绍了电视机常见故障的检测和维修知识。通过实训，旨在让同学们掌握黑白电视机的组成方框图，各部分的作用、工作原理、学会对电路进行正确的分析。同时学会基本电子元器件的识别、熟悉一些常用电子器件的功能与作用。最后学会电视机的组件的组装、调试和简单的维修方法。 目录 前言·································································3 第一章 黑白电视机实训基础知识····································4 1.1电视机专用、常用元器件的测试·································4 1.2光学、视觉特性知识·············································8 1.3电子成像原理···················································11 1.4黑白全电视信号················································14 1.5黑白电视机原理框图···········································17 第二章 黑白电视机各部分组成与作用······························17 2.1 公共通道组成与作用···········································17 2.2 中频通道组成与作用···········································18 2.3 伴音通道组成与作用···········································19 2.4扫描电路组成与作用···········································19 2.5稳压电路·······················································22 第三章 电视机常见故障及检修方法································22 3.1常见故障现象及分析···········································22 3.2 常用检修方法················································· 22 3.3黑白电视机调试················································25 结论······························································· 27 致谢································································28 参考文献···························································29 前 言 本实训项目通本报告正是以实训项目为载体，对实训项目中用到的各类元器件进行综合了解。在前面两个学期进行了“电工电子基本技能实训1”、“电工电子基本技能实训2”等实训项目训练后，同学们已具备电子基本理论知识与初级产品的线路设计、原理图绘制、产品的组装、调试等能力。在此基础上，通信产品设计与制作综合实训的训练目的是：进一步将本学期已经学过的相关课程及在课程中已初步掌握通信原理、高频知识及线路设计融合在一起，通过一个典型无线通信产品的方案设计、元器件选型、原理图与安装图绘图、产品生产制造、工艺文件编制、产品调试，产品质量检测分析与项目完成后的评估总结报告的撰写等完整工作过程的训练，培养同学们的完成一个实际工业电气产品项目的综合职业能力。 第一章 黑白电视机实训基础知识 1．1电视机专用、常用元器件的测试 1.电阻器的测量 电视机常用的电阻器有碳膜电阻、金属膜电阻、水泥电阻、热敏电阻、保险电阻、电位器等