SIEMENS ACUSON X150维修案例

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                    <p><span><span><p><img src="image/20201019/9ffe06835b8c52c232c81e5f435d4c74_1.jpg" /></p><br  /></span></span></p><p><span><span><br  /></span></span></p><p><span><span>彩色多普勒超声诊断系统是</span><span>SIEMENS</span><span>公司最新推出的新一代彩色超声诊断系统。</span><span>ACUSON X150</span><span>超声系统以</span><span>ACUSON</span><span>系列超声技术为基础，移植了西门子高档机</span><span> Sequoia</span><span>和</span><span>Antares </span><span>的先进成像技术，具有无比优异的图像质量和全面的临床应用领域。如果设备发生故障有及时解决是临床使用的重要保障。通过讲述几例常见的故障的解决方法，提高临床的使用性。</span></span></p><p><span><span> &nbsp; &nbsp; &nbsp; &nbsp;1</span><span>、无法进入系统的故障</span></span></p><p><span><span> &nbsp; &nbsp;故障：开机后，显示屏显示以下对话框，如图</span><span>1</span><span>所示，内容为“</span><span>the system is shutting down automatically to prevent permanent damage, please contact Siemens Service”</span><span>，接着就重启。有时，开机正常，机器用了</span><span>2-5</span><span>小时后，突然弹出图</span><span>1</span><span>对话框。</span></span></p><p><p><img src="image/20201019/fedde50a5d47a792ce1d3ab36eddc1af_2.jpg" /></p><br  /><span>故障分析</span></p><p><span><span> &nbsp; &nbsp; &nbsp; &nbsp;X150</span><span>整机主要是由</span><span>Ac POWER</span><span>、</span><span> DC power</span><span>、</span><span>Ti</span><span>板、</span><span>TR</span><span>板、</span><span>RC</span><span>板、</span><span>BE</span><span>板、</span><span>IO</span><span>板、操作面板、显示器、探头组成的。</span></span></p><p><span><span> &nbsp; &nbsp; &nbsp; &nbsp;AC power </span><span>主要是将</span><span>220</span><span>的交流电压转变为</span><span>48V</span><span>、</span><span>5V</span><span>的</span><span>DC</span><span>电压。</span></span></p><p><span><span> &nbsp; &nbsp; &nbsp; &nbsp;DC power</span><span>是将</span><span>Ac power</span><span>输出的</span><span>48V</span><span>电压经过</span><span>DC power </span><span>的</span><span>DC-DC</span><span>电路转变为</span><span>+/-3.3</span><span>、</span><span>+/-5</span><span>、</span><span>+/-12</span><span>、</span><span>+/-100</span><span>等电压，主要是给</span><span>Ti</span><span>板、</span><span>Ti</span><span>板、</span><span>TR</span><span>板、</span><span>RC</span><span>板、</span><span>BE</span><span>板、</span><span>IO</span><span>板、操作面板供电。</span></span></p><p><span><span> &nbsp; &nbsp; &nbsp; Ti</span><span>板是负责控制探头的工作情况，例如：负责探头的选定，控制那一个探头在工作状态，接收</span><span>TR</span><span>板的接发收信号等。</span></span></p><p><span><span>RC</span><span>板主要负责处理、控制超声回波信号；</span><span>BE</span><span>板是相当是一个中央处理板，负责掌控整个机器的运行与处理。</span><span>IO</span><span>板上有一个硬盘，硬盘里主要是装载着系统软件与超声应用软件，还要负责视频输出与音频处理。</span></span></p><p><span><span> &nbsp; &nbsp; &nbsp; 2</span><span>、解决方法</span></span></p><p><span><span> &nbsp; &nbsp; &nbsp; </span><span>首先应该要排除是否是因为设备电源故障引起的故障，第一步：检测</span><span>Ac POWER</span><span>，有两个方法，一、可以通过</span><span>Ac POWER</span><span>后面的指示灯“</span><span>PWR ON</span><span>”判断，接上交流电后，打开</span><span>Ac POWER</span><span>的开关，如果观察到该指示灯闪亮，那证明</span><span>Ac POWER</span><span>是正常的。如果是</span><span>Ac POWER </span><span>不亮，那就是有故障的。二、开机后，用万用表检测</span><span>CN1</span><span>接口的电压，如果检测到有</span><span>+48V</span><span>的电压输出，那</span><span>Ac POWER</span><span>是正常的，否则则反。用以上方法检测到</span><span>Ac POWER</span><span>输出是正常的。</span></span></p><p><span><span> &nbsp; &nbsp; &nbsp; </span><span>第二步：检测</span><span>DC POWER</span><span>，方法为</span><span>:</span><span>开机后，用万用表检测</span><span>+/-3.3</span><span>、</span><span>+/-5</span><span>、</span><span>+/-12</span><span>、</span><span>+/-100</span><span>等</span><span>DC POWER</span><span>输出电压。检测点如图</span><span>2</span><span>所示，</span></span></p><p><p><img src="image/20201019/54e6caa106e3f2b7746d2d212cc7d994_3.jpg" /></p><br  /><span><span>其中检测到</span><span>+/-100</span><span>电压不正常，根据这台设备的原理，可知，要用到</span><span>+/-100V</span><span>的电压的板块，只要</span><span>Tr</span><span>板与</span><span>Ti</span><span>板，其他的板块只是用到低压电压。现在主要是找出是</span><span>Tr</span><span>板还是</span><span>Ti</span><span>板引起的故障？方法为：排除法，首先把</span><span>Tr</span><span>板拆出来放好，接着重新开机，检测</span><span>+/-100V</span><span>的电压是否正常，检测到</span><span>+/-100V</span><span>的输出情况依旧，因此可以判断不是由</span><span>TR</span><span>板引起的故障，应该是</span><span>Ti</span><span>板引起的故障。为了更准确的确定故障点，再多做一道工序，关机，把</span><span>Tr</span><span>板装回原位，把</span><span>Ti</span><span>板拆下来，开机，检测</span><span>+/-100V</span><span>的输出情况，结果发现，</span><span>+/-100V</span><span>的输出正常。经过这次的检测，可以完全确定是由</span><span>Ti</span><span>板引起的故障。</span></span></p><p><span><span> &nbsp; &nbsp; &nbsp; &nbsp;</span><span>第三步：确定了故障原因，找出故障点。</span></span></p><p><span><span>首先要分析一下这块</span><span>Ti</span><span>板的检测维修我们该如何入手故障原因是因</span><span>+/-100V</span><span>的输出不正常，是</span><span>+/-100V</span><span>的负载</span><span>Ti</span><span>板故障引起的，因此先从</span><span>Ti</span><span>板的</span><span>+/-100V</span><span>负载电路查起，了解</span><span>+/-100V</span><span>工作电路。查到</span><span>DC POWER+/-100V</span><span>输出的电压到了</span><span>Ti</span><span>板，是由</span><span>XC2S50E</span><span>微处理器与两个小贴片三极管与两个小电阻等组成的高压控制电路，由他掌控着</span><span>+/-100V</span><span>是否输给</span><span>Ti</span><span>板上的</span><span>HV</span><span>开关芯片</span><span>HV209</span><span>芯片工作。</span></span></p><p><span><span> &nbsp; &nbsp; &nbsp; &nbsp;</span><span>接着进行一次模拟检测，找来一个有两组输出的稳压电源，选择一组双电源</span><span>+/-30V</span><span>，接到</span><span>Ti</span><span>板上的</span><span>+/-100V</span><span>输入点上。测试</span><span>+/-30V</span><span>有没有到</span><span>Ti</span><span>板上的</span><span>HV</span><span>开关芯片</span><span>HV209</span><span>芯片上，检测到电压没有到该芯片，上机测试也一样。因此把重点放在高压控制电路上。</span></span></p><p><span><span> &nbsp; &nbsp; &nbsp; </span><span>最后检测高压控制电路上的小三极管开路，更换三极管。故障解决。</span></span></p><p><br  /></p><p><p><img src="image/20201019/df1c2eb09b3189e573942cb954365e1d_4.png" /></p><br  /></p>