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	<title>专注福禄克测试仪销售与技术 &#187; fluke万用表维修</title>
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		<title>福禄克F15B+和F17B+电路故障维修经验系列- 电表开机无任何显示</title>
		<link>http://www.faxytech.com/archives/f15-f17-wx.html</link>
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		<pubDate>Tue, 17 May 2016 07:13:00 +0000</pubDate>
		<dc:creator>深圳连讯</dc:creator>
				<category><![CDATA[技术专栏]]></category>
		<category><![CDATA[F15B+维修]]></category>
		<category><![CDATA[F17B+维修]]></category>
		<category><![CDATA[fluke万用表维修]]></category>
		<category><![CDATA[fluke维修]]></category>

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		<description><![CDATA[导读：福禄克F15B+和F17B+电路故障维修经验系列，下面的图上我们可以看出F15B和F17B的区别在于15B没有温度测量功能，而F17B有温度测量功能，F15B比F17B少了两个按钮，分别足相对值REL和频率，其... ]]></description>
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<td><span style="font-size: 13px; line-height: 19px;">导读：福禄克F15B+和F17B+电路故障维修经验系列，下面</span><span style="font-size: 13px; line-height: 19px;">的图上我们可以看出F</span><span style="font-family: 'Times New Roman';">15</span><span style="font-size: 13px; line-height: 19px;">B和F</span><span style="font-family: 'Times New Roman';">17</span><span style="font-size: 13px; line-height: 19px;">B的区别在于</span><span style="font-family: 'Times New Roman';">15</span><span style="font-size: 13px; line-height: 19px;">B没有<span class='wp_keywordlink'><a href="http://www.faxytech.com/products/testers/temp" title="温度测试">温度</a></span>测量功能，而F</span><span style="font-family: 'Times New Roman';">17</span><span style="font-size: 13px; line-height: 19px;">B有温度测量功能，F</span><span style="font-family: 'Times New Roman';">15</span><span style="font-size: 13px; line-height: 19px;">B比F</span><span style="font-family: 'Times New Roman';">17</span><span style="font-size: 13px; line-height: 19px;">B少了两个按钮，分别足相对值REL和频率，其实F</span><span style="font-family: 'Times New Roman';">15B</span><span style="font-family: 宋体;">改造F</span><span style="font-family: 'Times New Roman';">17B</span><span style="font-family: 宋体;">非常简单，F</span><span style="font-family: 'Times New Roman';">15B</span><span style="font-family: 宋体;">就是用的F</span><span style="font-family: 'Times New Roman';">17B</span><span style="font-family: 宋体;">的板，导电开关己经印刷在板子上了，只要加上两个按钮，在加上三个运放和两个电位器就可以改造成</span><span style="font-family: 'Times New Roman';">17B</span><span style="font-family: 宋体;">并且有温度测量功能。</span>&nbsp;</p>
<p>&nbsp;</p>
<p>下面为福禄克<span style="font-family: 'Times New Roman';">15B/17B</span><span style="font-family: 宋体;">的拆机图，他们的区别就是在于少了三个运放和两个电位器，从图上我们可以着出该<span class='wp_keywordlink'><a href="http://www.faxytech.com/products/testers/fluke-multimeter" title="Fluke福禄克万用表">万用表</a></span>采用台湾富晶公司生产的</span>FS9721_LP3带微处理器的3/4<span style="font-family: 宋体;">位</span>AD转换器，该A/D转换器集成电压，电流，电阻，蜂鸣，频率，AC/DC转换（内置运算放人器）等功能，外接4M石英晶体振荡器做时钟振荡器，16脚的IC为HC148是一个异或门是用在小数点驱动电路作用是驱动小数点进行动态显示，左面有一个八脚IC<span style="font-family: 宋体;">，</span><span style="font-family: 'Times New Roman';">LT</span>1097<span style="font-family: 宋体;">， </span><span style="font-family: 'Times New Roman';">1097 </span><span style="font-family: 宋体;">下面有个五脚的</span>IC LMC7111， mA插孔附近也有一个五角的IC<span style="font-family: 宋体;">，</span><span style="font-family: 'Times New Roman';">TMP35</span> ，这三个IC分别做温度挡测量电路，做温度/<span style="font-family: 宋体;">电压转换。</span></p>
<p><span style="font-family: 宋体;"><a href="http://www.faxytech.com/wp-content/uploads/2016/05/fluke-15b-xl.png" class="highslide-image" onclick="return hs.expand(this);"><img class="alignnone size-full wp-image-7597" title="福禄克15B+与F17B+万用表电路板" src="http://www.faxytech.com/wp-content/uploads/2016/05/fluke-15b-xl.png" alt="福禄克15B+与F17B+万用表电路板" width="608" height="639" /></a></span></p>
<h4>Fluke 15B+与Fluke 17B+电表开机无任何显示：</h4>
<p>首先要检<span style="font-family: 'Times New Roman';">3V</span><span style="font-family: 宋体;">电源电池是否有电，如果</span><span style="font-family: 'Times New Roman';">3V</span><span style="font-family: 宋体;">电源正常，则第二步要检测电池触片是否氧化，接触不良，电池触片折断，与电路板开焊等，如果都没问题，第三部分检查波段开关，下图中的</span><span style="font-family: 'Times New Roman';">S1</span><span style="font-family: 宋体;">，是否出现波段开关</span><span style="font-family: 'Times New Roman';">V</span><span style="font-family: 宋体;">子片变形接触不良，导致电表无显示，如果都都没有问题，则要重点检测液晶屏和导电胶，是否导电橡胶氧化或液晶显示屏损坏导致无法显示，如果导电橡胶和液晶屏均正常，则要检查主芯片部分。首先检查主芯片工作条件</span><span style="font-family: 'Times New Roman';">3V</span><span style="font-family: 宋体;">电源加到</span><span style="font-family: 'Times New Roman';">48</span><span style="font-family: 宋体;">脚和</span><span style="font-family: 'Times New Roman';">44</span><span style="font-family: 宋体;">脚，两只表笔分别测量</span><span style="font-family: 'Times New Roman';">48</span><span style="font-family: 宋体;">脚和</span><span style="font-family: 'Times New Roman';">44</span><span style="font-family: 宋体;">脚必须要有</span><span style="font-family: 'Times New Roman';">2.8V</span><span style="font-family: 宋体;">以上电源，如果没有就是</span><span style="font-family: 'Times New Roman';">S1</span><span style="font-family: 宋体;">开关到</span><span style="font-family: 'Times New Roman';">9721</span><span style="font-family: 宋体;">的</span><span style="font-family: 'Times New Roman';">48</span><span style="font-family: 宋体;">脚有开路，如果有</span><span style="font-family: 'Times New Roman';">2.8V</span><span style="font-family: 宋体;">电源电表无显示则要检查外接</span><span style="font-family: 'Times New Roman';">4M</span><span style="font-family: 宋体;">晶振是否起振，如果晶振没问题，电表还无显示，那边则说明</span><span style="font-family: 'Times New Roman';">FS9721_LP3</span><span style="font-family: 宋体;">性能不良，虚焊或击穿导致电表无法开机，如果</span><span style="font-family: 'Times New Roman';">FS9721_LP3</span><span style="font-family: 宋体;">击穿的话，整机电流会很大的直接更换主芯片即可修复。</span></p>
<p><a href="http://www.faxytech.com/wp-content/uploads/2016/05/FS9721_LP3.png" class="highslide-image" onclick="return hs.expand(this);"><img class="alignnone size-full wp-image-7598" title="FS9721_LP3" src="http://www.faxytech.com/wp-content/uploads/2016/05/FS9721_LP3.png" alt="FS9721_LP3" width="592" height="399" /></a></p>
<p><span style="font-family: 宋体;"><br />
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<p><strong>其他Fluke 15B 与F17B维修参考：</strong></p>
<p><strong>点击</strong>：<a href="http://www.faxytech.com/archives/f15-f17-wx.html">FLUKE 15B+与17B+维修故障1</a><strong><a href="http://www.faxytech.com/archives/f15-f17-wx.html">：</a></strong><a title="福禄克F15B+和F17B+电路故障维修经验系列- 电表开机无任何显示" href="http://www.faxytech.com/archives/f15-f17-wx.html">电表开机无任何显示</a></p>
<p><strong>点击：</strong><a title="FLUKE 15B+与17B+维修故障2：直流电压挡无法测量故障维修" href="http://www.faxytech.com/archives/f15b-f17b-wx2.html">FLUKE 15B+与17B+维修故障2：直流电压挡无法测量故障维修</a></p>
<p><strong>点击：</strong><a title="FLUKE 15B+与17B+维修故障3：交流档不能测量故障维修" href="http://www.faxytech.com/archives/f15b-f17b-wx3.html">FLUKE 15B+与17B+维修故障3：交流档不能测量故障维修</a></p>
<p><strong>点击：</strong><a title="FLUKE 15B+与17B+维修故障4：AC/DC 电流挡不能测量故障" href="http://www.faxytech.com/archives/f15b-f17b-wx4.html">FLUKE 15B+与17B+维修故障4：AC/DC 电流挡不能测量故障</a></p>
<p><strong>点击：</strong><a title="FLUKE 15B+与17B+维修故障5：17B 温度挡不能测量故障维修" href="http://www.faxytech.com/archives/f15b-f17b-5.html">FLUKE 15B+与17B+维修故障5：17B 温度挡不能测量故障维修</a></p>
<p><strong>点击：</strong><a title="FLUKE 15B+与17B+维修故障6： 万用表开机不显示小数点任何挡位也均不显示小数点" href="http://www.faxytech.com/archives/f15-f17-wx6.html">FLUKE 15B+与17B+维修故障6： 万用表开机不显示小数点任何挡位也均不显示小数点</a></p>
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