飞利浦BV-25移动式C型臂故障现象检修3例

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                    <p style=""><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 112, 192); box-sizing: border-box !important; word-wrap: break-word !important;">故障一： ?</span></strong> ? ?</p><p style="">表现：机器插上电源时，F1或F2（15A保险）熔断，一般随机烧毁一个，使得机器无法上电</p><p style=""><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /></p><p style="">检修经过：取掉电源插座，检测外电源220V正常，检测电源线对地电阻，没有短路现象两电源线相互电阻为18欧，在线检测可控硅T1、T2、T3没有异常。参考电源控制框图：T1、T2是主控制开关，T3在T1、T2导通0。2秒后导通，抑制主变压器励磁电流对供电电源的影响。T1、T2、T3受控于电源控制板上的光电藕合器，去掉可控硅T1、T2控制信号线，机器插电，电源电流仅0。1A，逐一检测T1、T2导通信号，发现有0。8V&quot;4V不等的直流电压，光电藕合器是工作在开关状态，其发出的控制信号应只有两种状态：0V或15V，出现这种状态说明光藕有损坏，更换相应光藕，机器恢复正常</p><p style=""><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /></p><p style=""><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 112, 192); box-sizing: border-box !important; word-wrap: break-word !important;">故障二： ?</span></strong> ?</p><p style="">表现：机器无法开机，POWER-ON指示灯闪烁，电源控制板绿色指示灯ON，红色指示灯OFF，电源控制是正常状态</p><p style="">检修经过：由于电源控制板红色指示灯OFF，可排除电源自身保护。该机采用整机连锁保护，许多控制板上有检测回路，当检测有误时，可及时掉电保护。</p><p style=""><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /></p><p style="">试短接电源控制板检修开关，给机器强行加电，开机后，自藕变压器中可听到间断的轰轰声，有时可烧毁F1或F2。电流较大，重点检查大功率器件，断电检察高压驱动，灯丝驱动相关大功率管，没有异常。加电测试高压充电电容电压，发现电压不能稳定，用机械表检测，指针来回摆动，摆动频率与变压器轰轰声同步。参考高压控制框图，在高压逆变回路中有过流保护：当逆变用大功率管有损坏或其他原因，导致回路过流时将自动切断充电，高压逆变回路没有短路性故障，检查过流保护电路，逐一检测高压保护板各电子器件，发现有一三极管集电极—发射极PN击穿，用个参数相近的国产管替代，将检修开关短接线取掉，机器恢复正常。</p><p style=""><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /></p><p style=""><strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; max-width: 100%; color: rgb(0, 112, 192); box-sizing: border-box !important; word-wrap: break-word !important;">故障三： ? </span></strong> ?</p><p style="">表现：压合透视脚闸，监视器无图像。X-RAY指示灯不亮</p><p style="">检修经过：转换到照相模式，机器曝光正常，X-RAY指示灯照样不亮，检察X-RAY指示灯，发现其已损坏，转换到透视模式，用胶片较长时间置于球管窗口前测试，发现无论是自动模式，还是手动模式，均无X线，排除影像回路故障，由于普通照相是正常的，基本可排除高压回路故障，重点考虑透视信号控制回路。</p><p style=""><br style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /></p><p style="">低压部分元气件损坏可能相对较小，考虑接触不良，将相关控制板逐一拔插，在束光器控制板上发现有线路板人为损坏迹象，调整束光期，开度没有变化，询问操作人员是装机是改装的，以前也出现个类似故障，考虑透视是否束光器相关，手动调整其开度，故障排除。</p><p style=""><img src="http://mmbiz.qpic.cn/mmbiz/rz7R73cuHRrv6jdOCoJeZmYwvEAIoHpY0a7yJL2egiaEokLTpwkIsIRTzTFUic09aEThKHS4hrEcSqU0lAS3tu5g/0" data-ratio="0.14784394250513347" data-w="487" width="auto" src="http://mmbiz.qpic.cn/mmbiz/rz7R73cuHRrv6jdOCoJeZmYwvEAIoHpY0a7yJL2egiaEokLTpwkIsIRTzTFUic09aEThKHS4hrEcSqU0lAS3tu5g/0?tp=webp" style="margin: 0px; padding: 0px; box-sizing: border-box !important; word-wrap: break-word !important; visibility: visible !important;"  /></p><p style=""><legend style="margin: 0px; padding: 0px; max-width: 100%; white-space: normal; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 24px; orphans: 2; widows: 2; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; max-width: 100%; font-family: arial, helvetica, sans-serif; box-sizing: border-box !important; word-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; max-width: 100%; color: rgb(102, 102, 102); box-sizing: border-box !important; word-wrap: break-word !important;"><span class="bkcolor" style="margin: 0px 8px 0px 0px; padding: 4px 10px; max-width: 100%; color: rgb(255, 255, 255); background-color: rgb(191, 0, 0); box-sizing: border-box !important; word-wrap: break-word !important; border-top-left-radius: 5px !important; border-top-right-radius: 5px !important; border-bottom-right-radius: 5px !important; border-bottom-left-radius: 5px !important;"></span></strong><strong style="margin: 0px; padding: 0px; max-width: 100%; color: rgb(60, 117, 45); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; max-width: 100%; color: rgb(192, 0, 0); box-sizing: border-box !important; word-wrap: break-word !important;">ID: </span></strong></span></legend></p><p style=""><legend style="margin: 0px; padding: 0px; max-width: 100%; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 24px; orphans: 2; widows: 2; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; max-width: 100%; font-family: arial, helvetica, sans-serif; box-sizing: border-box !important; word-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; max-width: 100%; color: rgb(60, 117, 45); box-sizing: border-box !important; word-wrap: break-word !important;"><span style="margin: 0px; padding: 0px; max-width: 100%; color: rgb(192, 0, 0); box-sizing: border-box !important; word-wrap: break-word !important;"></span></strong></span></legend></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; word-wrap: normal; clear: both; min-height: 1em; white-space: pre-wrap; overflow: hidden; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 24px; orphans: 2; widows: 2; background-color: rgb(255, 255, 255); box-sizing: border-box !important;"><span style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">平台的理念：分享维修经验，为工程师提供技术配件支持，为临床使用者提供医疗器械使用保养维护信息，关注我们传递正能量。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; word-wrap: normal; clear: both; min-height: 1em; white-space: pre-wrap; overflow: hidden; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 24px; orphans: 2; widows: 2; background-color: rgb(255, 255, 255); box-sizing: border-box !important;"><span style="margin: 0px; padding: 0px; max-width: 100%; font-family: 仿宋; font-size: 19px; box-sizing: border-box !important; word-wrap: break-word !important;">微信公众号:</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; max-width: 100%; word-wrap: normal; clear: both; min-height: 1em; white-space: pre-wrap; overflow: hidden; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 24px; orphans: 2; widows: 2; background-color: rgb(255, 255, 255); box-sizing: border-box !important;"><span style="margin: 0px; padding: 0px; max-width: 100%; font-family: 仿宋; font-size: 19px; box-sizing: border-box !important; word-wrap: break-word !important;"> ? 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