航嘉pc电源维修手册

目录

第一部分基础知识了解-------------------------------------------------------------------------6第一章电子元器件-------------------------------------------------------------------------6第一节保险丝（管）-------------------------------------------------------------------6第二节电阻器----------------------------------------------------------------------------7第三节电容器---------------------------------------------------------------------------13第四节磁性元件------------------------------------------------------------------------15

1：电感-------------------------------------------------------------------------------15

2：变压器----------------------------------------------------------------------------17第五节二极管-----------------------------------------------------------------------------19

1: 二极管------------------------------------------------------------------------------19

2: 二极管的分类---------------------------------------------------------------------20第六节开关管----------------------------------------------------------------------------24

1: 三极管------------------------------------------------------------------------------24

2: 三极管做开关管------------------------------------------------------------------26

3: MOS管做开关管-----------------------------------------------------------------27第七节集成电路------------------------------------------------------------------------29

1: 集成电路-----------------------------------------------------------------------------29

2: PC电源常用集成电路功能简述------------------------------------------------29第二章有关直流稳压电源知识了解---------------------------------------------------43第一节: 相关基础电路了解------------------------------------------------------------43

1 交流电与直流电-------------------------------------------------------------------43

2 整流电路----------------------------------------------------------------------------44

3 滤波电路----------------------------------------------------------------------------45

4 电阻分压电路----------------------------------------------------------------------47第二节稳压电源发展过程------------------------------------------------------------49

1 简单的交流变直流电源------------------------------------------------------------49

2 稳压管稳压电路---------------------------------------------------------------------49

3 串联式稳压电路---------------------------------------------------------------------50

4 三端稳压块式稳压电路------------------------------------------------------------51第三章有关开关稳压电源知识了解----------------------------------------------------53第一节电压转换类型-------------------------------------------------------------------53 1: AC---AC转换器-------------------------------------------------------------------53 2: AC---DC转换器-------------------------------------------------------------------54 3: DC---DC转换器-------------------------------------------------------------------54 4: DC---AC转换器-------------------------------------------------------------------55第二节开关电源的拓扑方式-----------------------------------------------------------56 1: 单端反激式-------------------------------------------------------------------------56 2: 单端正激式-------------------------------------------------------------------------56 3: 推挽式-------------------------------------------------------------------------------57 4: 半桥式-------------------------------------------------------------------------------58 5: 全桥式-------------------------------------------------------------------------------58

第三节开关电源的调制方式-----------------------------------------------------------59 1: 脉宽式--------------------------------------------------------------------------------59 2: 脉频式--------------------------------------------------------------------------------61 3: 脉宽脉频调制方式-----------------------------------------------------------------61 4: 脉冲幅度调制方式-----------------------------------------------------------------61 5: 占空比--------------------------------------------------------------------------------61第四节稳压------------------------------------------------------------------------------62第四章PC电源的技术指标了解---------------------------------------------------65第一节PC电源的作用与时序了解-------------------------------------------------65第二节PC电源的一些技术指标-----------------------------------------------------66 1：PC电源的调整率-----------------------------------------------------------------66 2：PC电源输出直流电压的规定范围--------------------------------------------67 3：输出纹波电压---------------------------------------------------------------------67 4：时间常数---------------------------------------------------------------------------68 5：电源效率---------------------------------------------------------------------------71 6：待机功率损耗---------------------------------------------------------------------71 7：温度特性---------------------------------------------------------------------------71 8：认证的了解-------------------------------------------------------------------------71第三节PC 电源的保护功能----------------------------------------------------------72第四节PC电源的输出线材及端子--------------------------------------------------73第五章维修方法与技巧-----------------------------------------------------------------74第一节维修工具与仪器--------------------------------------------------------------74 1: 常用工具和仪器使用------------------------------------------------------------74