开立S8便携式彩超图像重影故障维修

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                    <p><img data-type="gif" class="__bg_gif " data-ratio="0.10555555555555556" data-w="720" src="http://mmbiz.qpic.cn/mmbiz/M2H0aGBjWUTRia7nqkArYeKZUqEfdmpNibMPiaZk4gvlWk5v5lUKyXhjJP4CENKQeQt5HI8zwcTCWJOkicfWJiatdJQ/640?wx_fmt=gif" style="white-space: normal;font-family: -apple-system-font, BlinkMacSystemFont, &quot;Helvetica Neue&quot;, &quotingFang SC&quot;, &quot;Hiragino Sans GB&quot;, &quot;Microsoft YaHei UI&quot;, &quot;Microsoft YaHei&quot;, Arial, sans-serif;letter-spacing: 0.544px;background-color: rgb(255, 255, 255);font-size: 15px;box-sizing: border-box !important;word-wrap: break-word !important;visibility: visible !important;width: auto !important;"  /></p><p style="text-align: center;"><img class="rich_pages" data-ratio="0.75" data-s="300,640" src="http://mmbiz.qpic.cn/mmbiz_jpg/dx3KibwtDhvfZ4omnibbOpuQPkf3j9JGTS4SiaDnmCpDoUaMwaLK9Jd2hAJCOLD6BJgNnibyowP7rtnPiakvTibjWjLQ/640?wx_fmt=jpeg" data-type="jpeg" data-w="960" style=""  /></p><p><strong style="font-size: 15px;"><span style="color: rgb(0, 0, 0);font-family: 宋体;"></span></strong><br  /></p><p><strong style="font-size: 15px;"><span style="color: rgb(0, 0, 0);font-family: 宋体;">故障现象：</span></strong></p><p style="line-height:130%;"><span style="font-family: 宋体;color: rgb(0, 0, 0);font-size: 15px;">&nbsp;&nbsp;&nbsp;&nbsp;</span></p><p style="line-height:130%;"><span style="font-family: 宋体;color: rgb(0, 0, 0);font-size: 15px;">开立S8便携式彩超正常开机后，扇形区图像会出现三道重影。（如上图）</span></p><p style="line-height:130%;"><span style="font-family: 宋体;color: rgb(0, 0, 0);font-size: 15px;">&nbsp;</span></p><p style="line-height:130%;"><span style="font-size: 15px;"><strong><span style="color: rgb(0, 0, 0);font-family: 宋体;">故障分析与处理：</span></strong><span style="color: rgb(0, 0, 0);font-family: 宋体;"></span></span></p><p style="line-height:130%;"><span style="font-family: 宋体;color: rgb(0, 0, 0);font-size: 15px;">&nbsp;&nbsp;&nbsp;&nbsp;</span></p><p style="line-height:130%;"><span style="font-family: 宋体;color: rgb(0, 0, 0);font-size: 15px;">开立S8便携式彩超系统主要由后端PC模块，前端探头板MPC-2、发射接收板DBTR、数字波束合成和信号处理及控制板DBF、高压处理板DBHV，输入输出模块等组成，其系统功能概述如下：</span></p><p style="line-height:130%;"><span style="font-family: 宋体;color: rgb(0, 0, 0);font-size: 15px;">&nbsp;&nbsp;&nbsp;&nbsp;</span></p><p style="line-height:130%;"><span style="font-size: 15px;"><span style="font-family: 宋体;color: rgb(0, 0, 0);"><span style="font-family: 宋体;">在发射任一矢量前，位于</span>DBF板上的RAM输出发射脉冲送至DBTR板，在DBTR板上，打开</span><span style="color: rgb(0, 0, 0);font-family: 宋体;">FET产生高压脉冲激励探头。发射脉冲经人体传播后，从人体返回的回波信号被探头获取，并且通过位于DBTR板上的前置放大器和TGC形成信号输出。同时DBF板将模拟信号转变为数字信号，并且进行进一步动态接收聚焦，动态孔径和动态变迹等处理，同时还做进一步的检波、扫描和图像处理。此时带有包含特定画面结构的原始图像信息经USB2.0以480Mbps的速度传到计算机。主机将处理原始的图像数据并且在显示器上显示出组织、彩色血流和频谱多普勒。同时，主机接收来自于用户键盘的命令，通过USB2.0接口送到DBF板。开关电源模块为高压板提供12V和5V的直流电，以及计算机主板需要的各组电源，高压板产生供给脉冲发生器的+90V电压和供给逻辑和模拟电路的低压。</span></span></p><p style="line-height:130%;"><span style="font-family: 宋体;color: rgb(0, 0, 0);font-size: 15px;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></p><p style="line-height:130%;"><span style="font-family: 宋体;color: rgb(0, 0, 0);font-size: 15px;">由系统功能原理可知，对于此类图像故障，可以认为是探头、DBTR板或者DBF板的故障引起。找同型号完好探头测试，发现故障依旧，可以排除探头的可能性。现在可以确定是</span><span style="color: rgb(0, 0, 0);font-family: 宋体;font-size: 15px;">DBTR板或者DBF板引起的故障，关机后把机器后盖打开观察，发现有烧焦味，然后把DBTR板和DBF板拿出来仔细观察，发现DBTR板上的Q60和Q187PN管已炸裂，DBF板上并无烧焦痕迹。</span></p><p style="line-height:130%;"><br  /></p><p style="line-height:130%;"><span style="font-family: 宋体;color: rgb(0, 0, 0);font-size: 15px;">到此基本可以确定是DBTR板引起的故障，更换同型号元器件后，装好机器，开机发现故障排除，机器可以组成使用，机器老化8小时无再出现故障</span></p><p style="line-height:130%;"><span style="font-family: 宋体;color: rgb(0, 0, 0);font-size: 15px;">&nbsp;</span></p><p style="line-height:130%;"><span style="font-size: 15px;"><strong><span style="color: rgb(0, 0, 0);font-family: 宋体;">维修总结：</span></strong><span style="color: rgb(0, 0, 0);font-family: 宋体;"></span></span></p><p style="line-height:130%;"><span style="font-family: 宋体;color: rgb(0, 0, 0);font-size: 15px;">&nbsp;&nbsp;&nbsp;&nbsp;</span></p><p style="line-height:130%;"><span style="color: rgb(0, 0, 0);font-size: 15px;font-family: 宋体;">在此故障的维修过程中，要熟悉机器的系统结构与系统功能原理，更要善于观察，仔细做到望、闻、听、测，保持冷静清醒的头脑，这样可以快速准确地找到故障点，排除故障。</span></p><p><br  /></p><p><br  /></p><p style="white-space: normal;max-width: 100%;min-height: 1em;letter-spacing: 0.544px;font-family: 微软雅黑;font-size: 16px;color: rgb(62, 62, 62);line-height: 25.6px;text-align: center;box-sizing: border-box !important;word-wrap: break-word !important;"><span style="max-width: 100%;color: rgb(0, 0, 0);font-size: 14px;box-sizing: border-box !important;word-wrap: break-word !important;">赞<span style="max-width: 100%;line-height: 25px;">是一种友谊 |&nbsp;<strong style="max-width: 100%;box-sizing: border-box !important;word-wrap: break-word !important;">分享</strong>传递智慧</span></span><br style="max-width: 100%;box-sizing: border-box !important;word-wrap: break-word !important;"  /></p><p style="white-space: 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border-box !important;word-wrap: break-word !important;"><img class="rich_pages " data-ratio="1" data-s="300,640" data-type="png" data-w="344" src="http://mmbiz.qpic.cn/mmbiz_png/dx3KibwtDhvcvQ5W66skZY3mYSqpoRYIMn3LOS0l9GkWVqSdiaw2RiclU8MiatfDmia3YvXxPRgDFiaZFibgUOEEfaYhA/640?wx_fmt=png" style="box-sizing: border-box !important;word-wrap: break-word !important;visibility: visible !important;width: 344px !important;"  /></p><p style="text-indent: 0em;white-space: normal;max-width: 100%;min-height: 1em;letter-spacing: 0.544px;color: rgb(62, 62, 62);font-size: 12px;font-family: Arial, Verdana, sans-serif;line-height: 1.75em;box-sizing: border-box !important;word-wrap: break-word !important;"><span style="max-width: 100%;color: rgb(0, 0, 0);font-size: 14px;box-sizing: border-box !important;word-wrap: break-word !important;">维修咨询：QQ: &nbsp;712638 404</span><br style="max-width: 100%;box-sizing: border-box !important;word-wrap: break-word !important;"  /></p><p style="text-indent: 0em;white-space: normal;max-width: 100%;min-height: 1em;letter-spacing: 0.544px;color: rgb(62, 62, 62);font-size: 12px;font-family: Arial, Verdana, sans-serif;line-height: 1.75em;box-sizing: border-box !important;word-wrap: break-word !important;"><span style="max-width: 100%;color: rgb(0, 0, 0);font-size: 14px;box-sizing: border-box !important;word-wrap: break-word !important;">设备咨询: &nbsp; QQ: &nbsp;712638 405</span></p><p style="white-space: normal;max-width: 100%;min-height: 1em;letter-spacing: 0.544px;font-family: 微软雅黑;font-size: 16px;color: rgb(62, 62, 62);line-height: 24.381px;box-sizing: border-box !important;word-wrap: break-word !important;"><span style="max-width: 100%;font-family: Arial, Verdana, sans-serif;line-height: 1.75em;text-indent: 0em;color: rgb(0, 0, 0);font-size: 14px;box-sizing: border-box !important;word-wrap: break-word !important;">软件咨询：QQ: 712638 406</span><br style="max-width: 100%;box-sizing: border-box !important;word-wrap: break-word 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