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class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁(yè)?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_yyby/">醫(yī)藥健康</a>?<a href="http://www.cdcfah.com/cp/second-yyby_ylsb/">醫(yī)療設(shè)備</a>?<a href="http://www.cdcfah.com/cp/third-ylsb_qtflpd/">其它未分類</a>?廣東蛇牌PV440攝像機(jī)主機(jī)芯片級(jí)維修服務(wù)為先成都鐳伙醫(yī)修平臺(tái)供應(yīng)</p><div id="3jg8wxz" class="leftbox clearfix"><h1>廣東蛇牌PV440攝像機(jī)主機(jī)芯片級(jí)維修服務(wù)為先成都鐳伙醫(yī)修平臺(tái)供應(yīng)</h1><div id="md8dvc8" class="proBig"><div id="a8zl7la" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/leihuo/637397534848922799/7031693.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="3wyp3mt" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/leihuo/637397534848922799/7031693.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="vwikheb" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>四川省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>廣東蛇牌PV440攝像機(jī)主機(jī)芯片級(jí)維修,PV440</p><p><span>***更新：</span>2021-01-28 02:07:58</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="xwdaryf" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">成都鐳伙科技有限公司</a></p><p><span>聯(lián)系人：</span>邱鋒</p><p><span>郵箱: </span>cdleihuokeji@163.com</p><p><span>電話: </span>13982269628</p><p><span>傳真: </span>028_</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>028-8444323</p><p><span>地址: </span>新都區(qū)踏水路創(chuàng)想大廈2單元2606</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="3q2gd8i" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="dr3cjn8" class="box"><p><p> B型超聲診斷儀電源電路的原理及故障現(xiàn)象1.電源電路的類型和原理便攜式B型超聲診斷儀的電源電路通常有三種類型：一是變壓器隔離降壓整流濾波型。這種電源電路一般采用交流220V(50Hz)作為隔離變壓器初級(jí)電壓輸入端，經(jīng)變壓器降壓后從次級(jí)輸出幾組不同的交流電壓，分別通過(guò)整流濾波電路得到直流電壓，后面通過(guò)電壓調(diào)整三極管(有的用場(chǎng)效應(yīng)管)或用三端穩(wěn)壓集成塊78系列和79系列得到所需要的電壓值。該類型電源電路結(jié)構(gòu)簡(jiǎn)單，電壓容易生成，廣東蛇牌PV440攝像機(jī)主機(jī)芯片級(jí)維修，但輸入電壓使用范圍較窄，在輸入電壓值波動(dòng)較大時(shí)，容易損壞。二是開(kāi)關(guān)電路型。它采用交流220V(50Hz)直接整流濾波得到308V左右的直流電，再通過(guò)PWM脈沖寬度調(diào)制電路和開(kāi)關(guān)管、開(kāi)關(guān)變壓器等元件組成的逆變器在開(kāi)關(guān)變壓器的次端產(chǎn)生頻率為幾十千赫至幾百千赫的多組交流低電壓，后面分別整流濾波得到相應(yīng)的直流工作電壓，一般在電路中還有電壓反饋電路，過(guò)壓、過(guò)流保護(hù)電路，廣東蛇牌PV440攝像機(jī)主機(jī)芯片級(jí)維修，使輸出電壓穩(wěn)定。這種開(kāi)關(guān)電路型電源比較大的優(yōu)點(diǎn)是輸入電壓范圍寬，直流工作電壓波形平坦，但修理較復(fù)雜。三是交，廣東蛇牌PV440攝像機(jī)主機(jī)芯片級(jí)維修、直流兩用型。該類供電方式有交流供電和蓄電池供電兩種方式，在市電供電時(shí)，一方面為主機(jī)提供工作電壓，另一方面為蓄電池充電。企業(yè)規(guī)定產(chǎn)品護(hù)帽等零部件使用注射用水精洗，但現(xiàn)場(chǎng)查見(jiàn)注射用水采用常溫。廣東蛇牌PV440攝像機(jī)主機(jī)芯片級(jí)維修</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東蛇牌PV440攝像機(jī)主機(jī)芯片級(jí)維修,PV440" src="https://tyunfile.71360.com/UploadFile/leihuo/637397534848922799/7031693.png"></div><p> 有的甚至廠家已不再負(fù)責(zé)維修，但這類設(shè)備一般再用3-5年尚不成問(wèn)題，仍有維修價(jià)值，值得在維修方面下功夫。(2)采用陰極射線管的監(jiān)護(hù)儀和采用液晶屏的監(jiān)護(hù)儀，二者在電路結(jié)構(gòu)、工作原理等方面有較大區(qū)別。采用液晶屏的監(jiān)護(hù)儀，體積小，結(jié)構(gòu)緊湊，顯示主要與主板、液晶屏本身、背光燈管有關(guān)，而主板和液晶屏一般條件下無(wú)法維修，只能整體更換。背光燈管為**備件，市場(chǎng)上不易買到，但部分液晶屏本身有一只備用燈管(在液晶屏組合內(nèi))，維修人員應(yīng)以注意。(3)在無(wú)線路圖及其他維修資料的情況下，分析排除此類故障，分析思路需清晰，處理方法需得當(dāng)，防止盲目動(dòng)手，擴(kuò)大故障。可采用分割法逐步縮小故障范圍，在有同型號(hào)設(shè)備的情況下，也可采用替代法，以盡快確定故障所在。對(duì)可疑元器件，同樣可以采用替代法進(jìn)行更換。另外，還可以采用空載和帶載法來(lái)判斷故障部位。采取正確靈活的方法手段，既可縮短故障排除時(shí)間，又可減少錯(cuò)判。(4)對(duì)于使用較老的設(shè)備，某一故障可能由多種或不同原因引起，本例故障就屬雙重故障，故應(yīng)循序漸進(jìn)，一步一步來(lái)解決。有的故障需根據(jù)電路結(jié)構(gòu)從前往后查，有的則應(yīng)從后往前查，有的需先靜態(tài)再動(dòng)態(tài)檢測(cè)和試驗(yàn)，需根據(jù)不同故障現(xiàn)象決定處理方式和步驟。。廣東蛇牌PV440攝像機(jī)主機(jī)芯片級(jí)維修發(fā)現(xiàn)設(shè)備正常啟動(dòng)，則確定HDD2硬盤內(nèi)容損壞，將備份還原，故障排除。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東蛇牌PV440攝像機(jī)主機(jī)芯片級(jí)維修,PV440" src="https://tyunfile.71360.com/UploadFile/leihuo/637397534841940319/9946968.png"></div><p> 對(duì)腎功能差、IVU不顯影的病人尤為適用。5、盆腔MRI可顯示子宮、卵巢、膀胱、前列腺、精囊等部位的病變?？芍苯涌吹阶訉m內(nèi)膜、肌層，對(duì)早期診斷子宮瘤病變有很大的幫助。對(duì)卵巢、膀胱、前列腺等處病變的定位定性診斷也有很大價(jià)值。6、后腹膜MRI對(duì)顯示后腹膜的瘤以及與周圍臟器的關(guān)系有很大價(jià)值。還可顯示腹主動(dòng)脈或其他大血管的病變，如腹主動(dòng)脈瘤、布—查綜合征、腎動(dòng)脈狹窄等。7、肌肉骨骼系統(tǒng)MRI對(duì)關(guān)節(jié)內(nèi)的軟骨盤、肌腱、韌帶的損傷，顯示率比CT高。由于對(duì)骨髓的變化較敏感，能早期發(fā)現(xiàn)骨轉(zhuǎn)移、骨髓炎、無(wú)菌性壞死、白血病骨髓浸潤(rùn)等。對(duì)骨瘤的軟組織塊顯示清楚。對(duì)軟組織損傷也有一定的診斷價(jià)值。1、其優(yōu)點(diǎn)為：1.沒(méi)有電離輻射；2.多方位成像（橫斷面、冠狀面、矢狀面和斜面）；3.解剖結(jié)構(gòu)細(xì)節(jié)顯示較好；4.對(duì)組織結(jié)構(gòu)的細(xì)微病理變化更敏感（如骨髓的浸潤(rùn)，腦水腫）；5.由信號(hào)強(qiáng)度可以確定組織的類型（如脂肪，血液和水）；6.組織對(duì)比優(yōu)于CT。2、同CT相比其不足之處：CT在顯示鈣化和骨胳肌肉系統(tǒng)的骨質(zhì)異常方面優(yōu)于MRI，這是由于MRI上鈣是無(wú)信號(hào)的，而CT則可以較好地顯示鈣化、骨皮質(zhì)和骨小梁結(jié)構(gòu)。盡管CT在顯示Paget’s病的典型骨改變和骨化性肌炎等方面優(yōu)于MRI。</p><p> 隨著醫(yī)學(xué)影像技術(shù)的發(fā)展，自動(dòng)洗片機(jī)已成為影像放射科必不可少的設(shè)備。它簡(jiǎn)化了膠片的沖洗程序，提高了暗室的工作效率，穩(wěn)定了照片質(zhì)量。由于工作人員操作上不規(guī)范，致使洗片機(jī)常出現(xiàn)故障。為了更好的發(fā)揮自動(dòng)洗片機(jī)的性能，延長(zhǎng)其壽命，對(duì)洗片機(jī)故障原因作了以下分析:1.膠片干燥不良的原因分析(1)電路部分故障，可導(dǎo)致烘干溫度失控，達(dá)不到膠片干燥溫度。(2)機(jī)械部分質(zhì)量問(wèn)題和故障。如輥軸與照片間隙不理想，水洗后的照片擠壓不均可導(dǎo)致照片烘干不良。熱風(fēng)機(jī)風(fēng)力不足或風(fēng)道受阻也可引起干燥不良。(3)洗槽內(nèi)無(wú)水或水量不足。使照片內(nèi)的硫代硫酸鈉殘留增加，引起干燥不良。(4)顯、定影液的陳舊，致使顯、定影不充分引起干燥不良。(5)沖洗時(shí)間太短，照片干燥不充分。2.卡片原因分析(1)人為故障主要指送片操作規(guī)范，正確的送片是膠片沿托盤邊緣直向前進(jìn)，當(dāng)膠片被斜行送入時(shí)，片角易被軸齒輪卡住。(2)機(jī)械故障。由于洗片機(jī)長(zhǎng)期使用，固定輥軸的螺絲松動(dòng)、彈簧圈掉落，齒輪磨損等，可使齒輪運(yùn)動(dòng)過(guò)程中咬合不良，輥軸壓力不均，膠片在運(yùn)行時(shí)易偏離而卡在齒輪中。3.膠片出現(xiàn)污跡及偽影(1)膠片傳送系統(tǒng)被污染。當(dāng)洗片機(jī)入口處污染水滴。將原HDD0硬盤換回，再替換HDD2，此時(shí)設(shè)備可正常啟動(dòng)，由此確定HDD2損壞導(dǎo)致故障。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東蛇牌PV440攝像機(jī)主機(jī)芯片級(jí)維修,PV440" src="https://tyunfile.71360.com/WaterMark/UploadFile/leihuo/637397534848922799/7031693.png"></div><p> 1故障現(xiàn)象儀器使用檢驗(yàn)帶和尿樣帶均出現(xiàn)TROUBLE-4錯(cuò)碼號(hào)。2故障分析當(dāng)儀器出現(xiàn)TROUBLE-4錯(cuò)碼時(shí)，即提示有光線太暗故障。造成這種故障的原因很多，若光源燈老化，光源供電電壓降低，試劑帶放反了，積分球損壞或臟了，放大板I有故障時(shí)，都會(huì)出現(xiàn)這種故障提示，維修時(shí)要逐一排查。3故障排查在排查故障時(shí)應(yīng)遵守由簡(jiǎn)到繁的原則。首先檢查試劑帶是否放反，然后檢查積分球是否損壞，用無(wú)水酒精清洗積分球，故障依舊。測(cè)試放大板I的供電電壓5V正常，在放大板I輸入端注人體感應(yīng)信號(hào)時(shí)，輸出端有變化，說(shuō)明放大板I正常，后面懷疑光源燈老化或光源燈供電電路有故障。在強(qiáng)光檔測(cè)試光源燈端電壓為，正常時(shí)應(yīng)為12V。在暗光檔測(cè)試光源燈端電壓為，正常時(shí)應(yīng)為2V。這說(shuō)明光源燈供電電路有故障，該光源燈亮度受接口電路8255的17腳控制，先查光源燈電源供給電路，測(cè)試接線柱CNl的1、4端，交流輸入電壓20V正常，測(cè)電源濾波電容C2兩端電壓25V正常。檢查三端集成穩(wěn)壓器LM317**元件無(wú)異常，斷開(kāi)LM317輸出端，12V電壓恢復(fù)正常，接上負(fù)載12V電壓立即降為，判斷12V負(fù)載電路有短路故障，查遍所有負(fù)載部分元件均未發(fā)現(xiàn)異常，用外接12V電源給儀器供電，儀器工作正常，說(shuō)明負(fù)載電路無(wú)短路故障。10、更換導(dǎo)光束;11、密封內(nèi)鏡;廣東蛇牌PV440攝像機(jī)主機(jī)芯片級(jí)維修</p><p style="text-indent:25px">再進(jìn)一步確定是HDD2的硬盤損壞還是內(nèi)容損壞。廣東蛇牌PV440攝像機(jī)主機(jī)芯片級(jí)維修</p><p> 好的方法是將旁邊lmV中的圓鋼片取出與其二者互換，保證能長(zhǎng)期使用。在更換工作室后出現(xiàn)間斷性干擾可能是由于和其它科室共用地線，若該地線上使用的設(shè)備存在漏電現(xiàn)象，加上人地電阻偏大，反饋到心電圖機(jī)中，出現(xiàn)干擾。通過(guò)拆除原地線，重新放置**地線，排除干擾。出現(xiàn)LEADOFF的顯示并不一定是由于電極脫落引起當(dāng)顯示器顯示LEADOFF時(shí)，首先檢查電極和導(dǎo)聯(lián)線情況，如若均正常，則可能為輸入放大器部分的故障，因?yàn)樵摍C(jī)電極檢測(cè)電路不是直接檢測(cè)導(dǎo)聯(lián)線輸入部分，而是檢測(cè)經(jīng)放大后的心電信號(hào)為基準(zhǔn)的，若某一個(gè)放大器或緩沖放大器不能正常工作，無(wú)放大的電信號(hào)輸出，電極檢測(cè)電路則測(cè)定為未接導(dǎo)聯(lián)線即導(dǎo)聯(lián)線脫落，顯示LEADOFF。如強(qiáng)制工作，能打印出心電圖，只有某些導(dǎo)聯(lián)心電波形正常，其余為變異的心電波形成一直線，多數(shù)為前置放大器或緩沖放大器有故障；若打印出全部為正常的心電圖波形方能說(shuō)明是電極檢測(cè)電路存在故障，出現(xiàn)誤報(bào)警。廣東蛇牌PV440攝像機(jī)主機(jī)芯片級(jí)維修</p><p style="text-indent:25px">成都鐳伙科技有限公司位于新都區(qū)踏水路創(chuàng)想大廈2單元2606。公司業(yè)務(wù)涵蓋內(nèi)窺鏡以及維修周邊，動(dòng)力系統(tǒng)及手柄附件維修，攝像系統(tǒng)主機(jī)及攝像頭維修，手術(shù)器械類維修等，價(jià)格合理，品質(zhì)有保證。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠(chéng)信為本的理念，打造儀器儀表良好品牌。成都鐳伙科技立足于全國(guó)市場(chǎng)，依托強(qiáng)大的研發(fā)實(shí)力，融合前沿的技術(shù)理念，飛快響應(yīng)客戶的變化需求。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3040692.html</p></div></div></div></div></div><div id="d3hu87t" class="page-right twoColRt"><div id="87vszbi" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="n7cu2ct" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="8vjahya" class="recomPic likePro"><a 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