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<p style="text-indent: 2em; line-height: 2em;">B<span style="font-family:宋体">超机维修时要按照一定的步骤和方法进行，才能做到解决问题而又少走弯路。其</span>B<span style="font-family:宋体">超维修过程一般分为五步：</span>1<span style="font-family:宋体">、了解故障</span>;2<span style="font-family:宋体">、分析故障</span>;3<span style="font-family:宋体">、故障检查</span>;4<span style="font-family:宋体">、故障排除</span>;5<span style="font-family:宋体">、指标调校。</span></p><p style="text-indent: 2em; line-height: 2em;"><span style="font-family:宋体"><br /></span></p><p style="text-align:center"><span style="font-family:宋体"><img data-s="300,640" data-type="jpeg" src="http://mmbiz.qpic.cn/mmbiz_jpg/dx3KibwtDhvfq5A6wXXiarlmCg9o324ia7QH62CibjexL1jCwJlu0NS8NJtF1AxSbUSMfSAkfxd4oMbVWULJEJeakQ/0?wx_fmt=jpeg" data-ratio="0.75" data-w="240" /><br /></span></p><p style="text-align:center"><span style="font-family:宋体"><br /></span></p><p style="text-indent: 2em; line-height: 2em;">1<span style="font-family:宋体">、了解故障</span></p><p style="text-indent: 2em; line-height: 2em;"><span style="font-family:宋体">了解故障是通过询问仪器操作人员</span>(<span style="font-family:宋体">或其他维修人员</span>)<span style="font-family:宋体">了解故障发生前和发生时的情况，如电压是否正常，是否有异常气味或异常声音，故障是突然发生还是逐步形成的，故障是否时有时无，设备的使用年限和故障发生时的使用环境，代换过哪些元件或调动过哪些地方等。另外通过自己的开机操作，观察故障的表现形式，可为分析故障提供依据，提高维修速度。</span></p><p style="text-indent: 2em; line-height: 2em;"><span style="font-family:宋体"><br /></span></p><p style="text-indent: 2em; line-height: 2em;">2<span style="font-family:宋体">、分析故障</span></p><p style="text-indent: 2em; line-height: 2em;"><span style="font-family:宋体">分析故障就是根据故障现象，分析判断故障产生的原因和大致所在的电路。这必须有一个先决条件，就是要熟悉该仪器的系统组成和电路工作原理，这样才能从实质上去分析故障产生的可能电路部分，并根据自己平时积累</span>(<span style="font-family:宋体">或别人</span>)<span style="font-family:宋体">的维修经验，快速地得出较准确的结论。</span></p><p style="text-indent: 2em; line-height: 2em;">B<span style="font-family:宋体">超一般由发射脉冲控制与产生电路、超声信号接收与处理电路、数字扫描变换电路、数字图像处理电路、超声探头部分以及监视器电路等组成。如果不知该机电路图，也应知道</span>B<span style="font-family:宋体">超的这样一些典型电路，再根据其方框图加以分析，但这种情况维修起来就比有图纸花费的时间和精力要多。</span></p><p style="text-indent: 2em; line-height: 2em;"><span style="font-family:宋体"><br /></span></p><p style="text-indent: 2em; line-height: 2em;">3<span style="font-family:宋体">、故障检查</span></p><p style="text-indent: 2em; line-height: 2em;"><span style="font-family:宋体">故障检查故障检查就是通过分析问题后，经过一定的测试，缩小故障范围，最后确定故障的具体位置。故障检查的基本方法可借鉴中医的</span>“<span style="font-family:宋体">望、闻、问、切</span>”<span style="font-family:宋体">四法。望</span>:<span style="font-family:宋体">就是用眼检查元器件</span>(<span style="font-family:宋体">电路板</span>)<span style="font-family:宋体">有无烧焦、变色、破裂、流液、虚焊、短路、脱落。通电后是否有打火、冒烟现象。闻</span>:<span style="font-family:宋体">就是用鼻子闻是否有异常气味。问</span>:<span style="font-family:宋体">就是前面所讲的向有关人员了解故障前和故障发生时的情况。切</span>:<span style="font-family:宋体">就是检查测量故障所在。检测故障应遵循的基本方法是先机外后机内</span>;<span style="font-family:宋体">先电源后主电路</span>;<span style="font-family:宋体">先电路板后电路单元。</span></p><p style="text-indent: 2em; line-height: 2em;"><span style="font-family:宋体"><br /></span></p><p style="text-indent: 2em; line-height: 2em;">4<span style="font-family:宋体">、故障排除</span></p><p style="text-indent: 2em; line-height: 2em;"><span style="font-family:宋体">检查出故障点后，就要排除故障，把失效的元器件换掉，把失调的元件调好，这时要十分注意不要弄坏印刷电路板和造成元器件之间短路。</span></p><p style="text-indent: 2em; line-height: 2em;"><span style="font-family:宋体"><br /></span></p><p style="text-align:center"><span style="font-family:宋体"><img data-s="300,640" data-type="jpeg" src="http://mmbiz.qpic.cn/mmbiz_jpg/dx3KibwtDhvfq5A6wXXiarlmCg9o324ia7Qtwr4ibvibnqRBxv8gibL9ibtYia7o88mfWAqtf4sdib4ApNROJMZX5AZrNyg/0?wx_fmt=jpeg" data-ratio="1.6659574468085105" data-w="940" /><br /></span></p><p style="text-align:center"><span style="font-family:宋体"><br /></span></p><p style="text-indent: 2em; line-height: 2em;">5<span style="font-family:宋体">、指标调校</span></p><p style="text-indent: 2em; line-height: 2em;"><span style="font-family:宋体">仪器修复后，维修工作还没有结束，首先应对故障可能影响的电路进行检查，看是否还存在故障或故障隐患。其次检修过的</span>B<span style="font-family:宋体">超还必须进行指标调试和校验，尽可能把仪器调整在最佳工作状态，这时整个维修工作才算全部结束。</span></p><p style="text-indent: 2em; line-height: 2em;"><span style="font-family:宋体"><br /></span></p><p style="text-indent: 2em; line-height: 2em;"><span style="font-family:宋体">总结：以上的各维修步骤之间、检修方法之间、步骤和方法之间都不是相互孤立的，而是统一的，在维修中要把它们有机地结合起来，交错合理运用，找出解决问题的最佳方案。维修是一个理论和实践相结合的过程，因此要注意积累平时的一些维修经验并加以总结，为日后解决问题创造条件。</span></p><p><br /></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-family: Arial, Verdana, sans-serif; font-size: 14px; line-height: 24px; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(249, 249, 249);">广州市设备维修有限公司</span></p><p style="max-width: 100%; min-height: 1em; 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; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">地址：广州市天河区银利街银利茶叶博览中心E栋4楼E4030室 邮编：510507</span></p><p style="max-width: 100%; min-height: 1em; 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; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">电话：(+86)020-8722 8723 8764 5360 8764 2943 传真：020-8722 8623</span></p><p style="max-width: 100%; min-height: 1em; 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; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">全国统一免费服务热线：400-020-6788</span></p><p style="max-width: 100%; min-height: 1em; 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; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">微信公众帐号：</span></p><p style="max-width: 100%; min-height: 1em; 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; background-color: rgb(255, 255, 255);"><img data-ratio="1" data-type="jpeg" data-w="120" width="auto" src="http://mmbiz.qpic.cn/mmbiz/dx3KibwtDhvfCZvZq5PcthnDKlnnq3AalhbichW77J3B70osicTickklZybNKUZqc44DZ0oaWaHm2p0TaA9478icwPg/640?wx_fmt=jpeg" style="box-sizing: border-box !important; word-wrap: break-word !important; width: auto !important; visibility: visible !important;" /></p><p style="max-width: 100%; min-height: 1em; 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; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">维修咨询：QQ: 712638 404</span></p><p style="max-width: 100%; min-height: 1em; 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; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">设备咨询: QQ: 712638 405</span></p><p style="max-width: 100%; min-height: 1em; 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; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; 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发表于 2020-10-19 23:42:59