美的MC-PSDtitle> <meta name="viewport" content="width=device-width, initial-scale=1" /> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <meta name="keywords" content="电磁炉蜂鸣器不响" /> <meta name="description" content="美的MC-PSD> <link href="/img/gdstw.css" rel="stylesheet" media="screen" type="text/css" /> <base target="_blank">  <script async src=></script> </head> <body> <script type="text/javascript" src="/js/newad.js"></script> <div> <div id="divHead"><table border="0" width="auto" cellspacing="0" cellpadding="0" bordercolor="#C0C0C0" style="border-collapse: collapse"><tr><td><script type="text/javascript" src="/js/head01.js"></script></td></tr></table></div> <div class="w960 center clear mt1"> <div class="pleft"> <div class="place"> <strong> ●</strong> <a href='/'>首页</a> > <a href='../'>玩转家电</a> > <a href='index.html'>电器维修</a> > </div> <div class="viewbox"> <div class="title"> <h1>美的MC-PSDh1> </div> <br><div align="left"><script type="text/javascript" src="/js/left.js"></script></div> <div class="content"> <p><strong>美的MC-PSDstrong></p> <p><strong>1、故障分析</strong>：</p> <p>主控 IC 或者蜂鸣器本身出现问题，故障范围定位在蜂鸣器本身及主控 IC 上。</p> <p><strong>2、检查步骤</strong>：<br /> <br /> 上电用万能表测量主控 IC 的第 21 脚，会有 5V 的电压，此时按一下显示板上的轻触开关，观察其电压变化。</p> <p>1、如果有 0.8V 的变化范围，就表示主控 IC有信号驱动蜂鸣器，是蜂鸣器本身已损坏。将蜂鸣器拆下来，换上一个好的蜂鸣器开机，蜂鸣声正常，故障排除。</p> <p>2、如果主 IC 的第 21 脚的电压没有变化，表示主控 IC 已损坏。更换主控 IC，故障排除。</p> </div> <p><div align="left"><table border="0" width="auto" cellspacing="0" cellpadding="0"><tr><td colspan="2"><script type="text/javascript" src="/js/left-01.js"></script></td></tr><tr><td><script type="text/javascript" src="/js/left-02.js"></script></td><td><script type="text/javascript" src="/js/left-03.js"></script></td></tr></table></div></p> <div class="handle"> <div class="context"> <ul> <li>上一篇：<a href='15432.html'>美的电磁炉的低压电源故障问题</a> </li> <li>下一篇：<a href='15434.html'>美的MC-PSDa> </li> </ul> </div> </div> </div> </div> <div class="pright"> <div align="center"><table border="0" width="auto" cellspacing="0" cellpadding="0" bordercolor="#C0C0C0" style="border-collapse: collapse"><tr><td><script type="text/javascript" src="/js/right-01.js"></script></td></tr><tr><td><script type="text/javascript" src="/js/right-02.js"></script></td></tr><tr><td><script type="text/javascript" src="/js/right-03.js"></script></td></tr></table></div> <div id="box"> <div id="float" class="div1"> <div class="hot mt1"> <dl class="tbox light"> <dt class='light'><strong>热点内容</strong></dt> <dd class='light'> <ul class="c1 ico2"> <div id='tag0b0d2159ea469164278d18ab8587b990'> ·<a href='1598.html'>泵-马达常用元件图形符号大全</a><br/> ·<a href='2688.html'>软线线头与平压式接线桩的连接方式</a><br/> ·<a href='15385.html'>热水器洗澡时要不要拔掉插头，为了安全建议</a><br/> ·<a href='2115.html'>安全帽没有什么颜色</a><br/> ·<a href='11003.html'>汽车冷却液红绿色能不能混加</a><br/> ·<a href='1226.html'>气动电磁阀选型时的几点注意事项</a><br/> ·<a href='11019.html'>电动车电池充电技巧：随用随充好还是用完充</a><br/> ·<a href='3423.html'>浴霸开关5开6头怎么接线，附浴霸开关5开接</a><br/> ·<a href='1864.html'>单相电机正反转实物接线图(启动电路)</a><br/> ·<a href='1769.html'>四个日光灯的原理接线图</a><br/> </div> </ul> </dd> </dl> </div> <div align="center"><script type="text/javascript" src="/js/right-05.js"></script></div> </div> </div> </div> </div> <br><script type="text/javascript" src="/js/gdjyw-3.js"></script> <br><script type="text/javascript" src="/js/news-2.js"></script> </body> </html>