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3#
发表于 2006-9-14 04:19:50
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来自: 湖北荆门 来自 湖北荆门
<b><span lang="EN-US"><font face="Times New Roman"><p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><b><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>7</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">,不开机的检修方法</span><span lang="EN-US">:<p></p></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><b><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>1.</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">排除</span><span lang="EN-US"><span style="mso-spacerun: yes;"> </span></span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">电源插座</span><span lang="EN-US">,</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">各模块松动接触不良</span><span lang="EN-US">,</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">主板上的附着物</span><span lang="EN-US">,cpu</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">松动</span><span lang="EN-US">.</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">虚焊等现象</span><span lang="EN-US">.<p></p></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><b><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>2.</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">检查</span><span lang="EN-US"><span style="mso-spacerun: yes;"> </span></span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">主供电保险丝</span><span lang="EN-US">,</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">是否烧毁</span><span lang="EN-US">,</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">如果烧毁</span><span lang="EN-US">,</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">要打电阻值</span><span lang="EN-US"><span style="mso-spacerun: yes;"> </span></span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">正向不能过小或短路反响可以忽略</span><span lang="EN-US">!(</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">排除隔离电路故障进入下一步</span><span lang="EN-US">)<p></p></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><b><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>3.</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">测量</span><span lang="EN-US">,3.3v/5v</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">产生电路</span><span lang="EN-US">/cpu</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">主供电电路</span><span lang="EN-US">/</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">电池充电电路</span>
</b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">有无供电电压</span><span lang="EN-US">=</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">适配器电压</span><span lang="EN-US"><span style="mso-spacerun: yes;"> </span></span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">无则检修相应电路</span><span lang="EN-US">.3.</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">电源启动按钮</span><span lang="EN-US"><span style="mso-spacerun: yes;"> </span></span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">正端</span><span lang="EN-US">
<p></p></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><b><span lang="EN-US"><span style="mso-spacerun: yes;"> </span></span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">有无</span><span lang="EN-US">3.5-5v</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">电压</span>
</b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">无则检查</span><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>3.3v/5v</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">电路</span><span lang="EN-US">
<p></p></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><b><span lang="EN-US"><span style="mso-spacerun: yes;"> </span></span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">一般都有这个电路产生</span><span lang="EN-US">.(3.3v/5v</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">产生电路判断应为没有图纸我们用反向法来判断主板上哪个电路是产生</span><span lang="EN-US">3.3v/5v</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">电路</span><span lang="EN-US"><span style="mso-spacerun: yes;"> </span></span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">首先</span>
</b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">找到</span><span lang="EN-US"><span style="mso-spacerun: yes;"> </span><p></p></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><b><span lang="EN-US"><span style="mso-spacerun: yes;"> </span></span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">内存插槽附近</span>
</b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">的贴片电容</span>
</b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">很明显</span><span lang="EN-US">(</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">电路板上的电容</span><span lang="EN-US">95%</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">都是用来滤波</span><span lang="EN-US">)</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">一端和地相连</span><span lang="EN-US">
<p></p></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><b><span lang="EN-US"><span style="mso-spacerun: yes;"> </span></span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">另一端就接着</span><span lang="EN-US">3.3v/5v</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">产生电路的输出电感上中间有保险电阻还可以用</span><span lang="EN-US">ps/2</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">鼠标口的供电</span><span lang="EN-US">5v</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">来判断</span><span lang="EN-US">3.3v/5v</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">产生电路</span><span lang="EN-US"><span style="mso-spacerun: yes;"> </span><p></p></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><b><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>(</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">特点笔记本的供电电路都有特点</span><span lang="EN-US">:</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">都是有</span><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>1</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">个电感</span><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>2</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">个</span><span lang="EN-US">mos</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">管</span><span lang="EN-US">(8</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">个脚的场效应</span><span lang="EN-US">3</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">极管</span><span lang="EN-US">) </span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">和电源模块</span><span lang="EN-US">(</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">统称了按作用不同分</span><span lang="EN-US">cpu</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">主电压</span><span lang="EN-US">
<p></p></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><b><span lang="EN-US"><span style="mso-spacerun: yes;"> </span></span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">电池充电</span><span lang="EN-US"> 3.3v/5v</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">产生电路</span>
</b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">这</span><span lang="EN-US">3</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">种电路结构</span>
</b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">很相近</span>
</b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">用反向法就可以区分哪个是什么电路</span><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>cpu</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">主供电</span><span lang="EN-US"><span style="mso-spacerun: yes;"> </span>cpu</span></b><b><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">附近贴片电容</span><span lang="EN-US"><span style="mso-spacerun: yes;"> </span><p></p></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><b><span lang="EN-US"><p></p></span></b></p></p></p></font></span></b> |
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