奥林巴斯高清晰度液晶监视器OEV262H

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                    <section><section powered-by="gulangu"><section><section powered-by="gulangu"><section><section><svg viewbox="0 0 1 1"></svg></section></section><section><section powered-by="gulangu"><p><strong>明日复明日，明日何其多。</strong></p></section><section powered-by="gulangu"><p>○</p></section><section powered-by="gulangu"><p><strong>无畏的太阳</strong></p></section><section powered-by="gulangu"><p>○</p></section><section powered-by="gulangu"><p><span>医疗|学习|钻研|电子电路|原理</span><br  /></p></section></section><section><section><svg viewbox="0 0 1 1"></svg></section></section></section><section powered-by="gulangu"><section><section powered-by="gulangu"><section><p><img src="image/20201019/c55ca87b896c29f63feb554dcc5ac3f3_1.jpg" /></p></section></section><section powered-by="gulangu"><p><strong>欢迎关注</strong></p></section></section><section><section powered-by="gulangu"><section><p><img src="image/20201019/1ee80f2d1a0a243f02cd76a0c70170d5_2.png" /></p></section></section><section powered-by="gulangu"><p><strong>好学医电在线</strong></p></section></section></section><section powered-by="gulangu"><p><strong>请留下你指尖的温度</strong></p><p><strong>让太阳拥抱你</strong></p><p><strong>记得这是一个有温度的公众号</strong></p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><br  /></section></section></section><section><section powered-by="gulangu"><section><section><br  /></section></section></section></section><section><section powered-by="gulangu"><p><strong>奥林巴斯高清晰度液晶监视器OEV262H</strong></p></section></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><br  /></section></section></section></section></section></section><section><section powered-by="gulangu"><section><br  /></section></section></section></section></section><section powered-by="gulangu"><section><section powered-by="gulangu"><section><br  /></section></section></section><section><section powered-by="gulangu"><section><p><strong>故障现象</strong></p></section></section></section></section><section powered-by="gulangu"><p><strong>接通电源，按下显示器开关按钮，显示器电源指示灯不亮，屏幕显示黑屏，无任何显示。</strong></p><p><strong>开启奥林巴斯主机，接上摄像头，开启冷光源主机，接上光纤，故障依旧。</strong></p></section><section powered-by="gulangu"><section><section powered-by="gulangu"><section><br  /></section></section></section><section><section powered-by="gulangu"><section><p><strong><span>分析过程</span></strong><br  /></p></section></section></section></section><section powered-by="gulangu"><p><strong>&nbsp; &nbsp; &nbsp; &nbsp;一、原理</strong></p><p><strong><span>腹腔镜系统影像传输大致原理：</span></strong></p><p><strong><span>摄像头接收到的信号（光信号），经奥林巴斯主机内部分析、处理，转换为电信号（光电转换）后，通过视频数据线传送到显示器内部。</span></strong></p><p><strong><span>再经显示器内部分析、处理、AD模数转换（数模转换）后，显示到屏幕上。</span></strong></p></section><section powered-by="gulangu"><section><section><p><img src="image/20201019/9d19d164f5416f35f2e96810dc518bc3_3.jpg" /></p></section></section></section><section powered-by="gulangu"><p><strong>二、分析</strong><strong></strong></p><p><span><strong>显示器空载上电，电源指示灯不亮且黑屏，开启主机和冷光源故障依旧。可以将故障锁定在以下两点：①显示器没坏，电源线未接好。</strong></span></p><p><strong>②电源线接好了，显示器坏。显示器背光灯坏，也会出现以上故障，所以背光也要先排除。</strong></p><p><span><strong>假如电源线和背光灯均排除，可以确认是显示器故障，由于故障现象提到电源指示灯都没亮，说明显示器未供电，故将问题锁定在电源模块。</strong></span><br  /></p></section><section powered-by="gulangu"><section><section powered-by="gulangu"><section><br  /></section></section></section><section><section powered-by="gulangu"><section><p><strong>解决方法</strong></p></section></section></section></section><section powered-by="gulangu"><p><strong>首先检查电源线是否存在松动，确认电压数值均正常，将周围的光源关掉，开启显示器，未发现背光灯点亮，暂时排除背光灯，</strong><strong>以上可以确认是显示器内部电源板坏。</strong></p></section><section powered-by="gulangu"><section><p><img src="image/20201019/ebff07580931cbb78711b8fd392a6621_4.jpg" /></p></section></section><section powered-by="gulangu"><p><strong>检查电源板上的所有保险丝均完好，上电检测电源板的输出口，均无输出。检测前级整流桥输出310VDC正常，测到其后级一个6脚开关芯片，发现芯片已经破裂，更换后修复。</strong></p></section><section powered-by="gulangu"><section><p><img src="image/20201019/f0fadc14068a2a04bd3085e9faa148b5_5.jpg" /></p></section></section><section powered-by="gulangu"><section><section powered-by="gulangu"><section><p>欢</p></section></section></section><section><section powered-by="gulangu"><section><p>迎</p></section></section></section><section><section powered-by="gulangu"><section><p>关</p></section></section></section><section><section powered-by="gulangu"><section><p>注</p></section></section></section></section><section powered-by="gulangu"><p><br  /></p></section><section powered-by="gulangu"><section><section powered-by="gulangu"><section><p><img src="image/20201019/c55ca87b896c29f63feb554dcc5ac3f3_1.jpg" /></p></section></section></section><section><section powered-by="gulangu"><section><section><br  /></section></section></section></section><section><section powered-by="gulangu"><p>好学医电在线</p><p>和他的朋友们</p></section></section></section></section>