迈瑞509／509A监护仪电源、屏暗等故障维修

故障现象１插上电源后 ,ＡＣＰＯＷＥＲ指示灯不亮。按“ＰＯＷＥＲ”键 ,不能开机。用机内后备电池也不能开机。故障分析与检修此种现象一般是由机内电源电路故障引起的。ＡＣＰＯＷＥＲ指示灯不亮 ,说明机内ＤＣ １２Ｖ电源有故障。用后备电池不能开机 ,说明除电源板外 ,其它电路也有故障。打开机箱 ,查后备电池输出电压为１２Ｖ ,工作电流也正常。查变压器两路ＡＣ输出为１８Ｖ。由电路分析可知 ,变压器ＡＣ１８Ｖ输出一路供给电源板 ,另一路供给控制板。电源板上ＤＳ２Ｅ -Ｓ继电器控制ＡＣ电源的输入 ,而继电器的工作电压则由控制板上…     

巧修CT GANTRY位置故障一例

故障现象 :在做人体扫描中经常发生突然中断现象 ,近日来故障趋于频繁。故障时ＣＲＴ上显示错误信息为“ＴＩＭＥＯＵＴＯＮＧＡＮＴＲＹＲＥＳＴＰＯＳＩＴＩＯＮＣＨＥＣＫ”或“ＴＩＭＥＯＵＴＯＮＦＩＬ ＴＥＲ/ＡＰＥＲＴＲＥＰＯＳＩＴＩＯＮＣＨＥＣＫ”。由于本故障有时伴随着不规律的伪影出现 ,故笔者决定先进行“ＣＡＬＩＢＲＡＴＩＯＮ”处理。不料在校正程序进行到“ＦＩＬＴＥＲ/ＡＰＥＲＴＵＲＥＣＨＥＣＫ”时即ＧＡＮＴＲＹ在ＣＣＷ状态下运行到ＨＯＭＥ位置时便不能继续执行 ,同时ＣＲＴ再次报出上述故障信息。故障分析与…     

日本岛津HD150B-10型700mA X线机故障检修

故障现象技术选择设置在普通摄影状态下 ,按摄影ＲＥＡＤＹ（预备摄影）键 ,Ｘ线球管阳极起动 ,瞬间控制台ＯＶＥＲ指示灯亮 ,所有动作停止。故障检修ＯＶＥＲ指示灯与四部分保护电路有关 :①过负荷保护电路 ;②灯丝、ｍＡ控制保护电路 ;③透视过ｍＡ或摄影过ｍＡｓ保护电路 ;④主可控硅保护电路。分析故障现象与①③部分保护电路无关 ,进一步检查发现时间控制电路中Ｋ２ -ＢＵ保护继电器工作造成ＯＶＥＲ指示灯亮。分析电路 :Ｋ２ -ＢＵ保护继电器只有在Ｋ１ -Ｔ１、Ｋ２ -Ｔ２继电器都不工作 ,主电路（即高初级）得电的情况下才工作。Ｋ１…     

西门子PLUS4螺旋CT E500111故障排除

故障现象:不管在扫描模式(ＳＣＡＮＭＯＤＥ)还是在预热模式(ＷＡＲＭＵＰ)方式下,主电源三相熔断器63Ａ都烧断,主机不能正常工作,查看ＬＯＯＫＢＯＯＫ,提示Ｅ500128及Ｅ500111故障代码,同时高压发生器柜上的Ｄ640板之一的ＵＴ>82ｋＶ红灯亮,做高压测试(ＨＶＣＴＥＳＴ)也通不过。故障分析:根据故障现象及故障代码,可能原因有以下几点。1高压发生器及高压变压器油箱(ＨＶ-ＴＡＮＫ)故障。2Ｘ线球管(Ｘ-ＲＡＹＴＵＢＥ)故障。3高压电缆(ＨＶ-ＣＡＢＬＥ)故障。4高压滑环(ＨＶ-ＳＬＩＰＲＩＮＧＳ)故障。5阻尼衰减器(ＤＡＭＰＩＮＧＲＥＳＩ…     

岛津 WHA— 10型移动式 X线机灯丝加热电路的故障检修

故障现象开机 ,机器操作台上ＯＶＥＲ灯即亮。ｍＡ控制板上的Ｄ３—０１灯也亮。机器无法进入工作状态。故障分析与检修根据上述故障现象 ,并结合随机电路原理进行综合分析。ｍＡ控制板上Ｄ３—０１灯是灯丝加热工作异常故障指示灯。初步分析故障可能是该机灯丝加热电流过大或电压过高引起保护电路动作所致。其保护电路原理是 ,当灯丝加热电路初级电流超过１．６Ａ时 ,在灯丝加热变频电路上过流检测电阻Ｒ４—０２两端产生一个大于５．２８Ｖ的电压 ,使稳压管Ｄ２反向击穿 ,光电耦合器ＰＣ２工作 ,Ｄ３—０１灯点亮 ,ＯＨＴ输出一低电平信号…     

3MHQ969激光相机系统故障1例

故障现象开机预热正常,随后ＰＲＯＣＥＳＳＯＲ(洗片机)断电,3ＭＨＱ969激光相机窗口显示Ｐ502ＮＯＣＯＭＭＵＮＩＣＡＴＩＯＮＳＷＩＴＨＰＲＯＣＥＳＳＯＲ。过一段时间后,机器自动恢复工作,随即又断电,重复上述过程。分析检修根据上述情况分析,相机与洗片机之间的通讯接口出现故障的可能性小,控制电路出现故障的可能性大,导致机器超限报警,启动保护电路,机器强制断电。首先,将ＫＥＹＢＯＡＲＤ上输出ＯＵＴＰＵＴＩＭＡＧＥ1ＰＲＯＣＥＳＳＯＲ切换到ＭＡＧＡＺＩＮＥ。试机,收片正常,说明相机部分没问题,故障在洗片机部分。由电路图可知…     

TOSHIBA TCT300S CT机球管更换

东芝ＴＣＴ３００ＳＣＴ机做“ＷＡＲＭＵＰ”时过不去 ,“ＯＶＥＲｍＡ”及“ＥＲＲＯＲ”指示灯均亮 ,对机器复位 (Ｒｅｓｅｔ）后，故障依旧。在“ＬＯＣＡＬ”方式 (１２０ｋＶ)下对机器进行曝光实验。将“ＬＯＣＡＬ”开关拨向“ＯＮ” ,电压／电流设置放在“ＬＫＶ”挡上 ,同时将“ＲＥＡＤＹ”及“Ｘ -ＲＡＹ”开关拨向“ＯＮ”位置上 ,故障仍然存在。此时发现正常工作状态指示“Ｎｏｒｍａｌ”灯不亮 ,且ＩＭＣ板上故障指示灯Ｄ１(ＯＶＥＲＫＶ)亮 ,说明Ｘ线管管电压超过正常值。检查“ＫＶ”及“ＯＶＥＲＫＶ”的设定及其相关电路…     

美国ACUSON ASPEN SN31893彩超特殊故障1例

美国ＡＳＰＥＮＳＮ３１８９３彩超系美国ＡＣＵＳＯＮ公司的最新一代产品 ,为新一代全功能彩超 ,该机型在部队医院拥有量较大 ,据对经销商了解还没有出现过类似的故障。故障现象开机后机器开始自检 ,４ＭＢＤＲＡＭＯＫ。然后是ＡＣＵＳＯＮＡＳＰＥＮ的杉树图象出现 ,机器进入ＰＯＷＥＲＤＩＡＧＮＯＳＴＩＣＳ ,一段时间后出现错误提示 :ＰＯＷＥＲＯＮＤＩＡＧＮＯＳＴＩＣＳＳＵＩＴＥＣＯＭＰＬＥＴＤ ,ＮＵＭＢＥＲＯＦＴＥＳＴＳＦＡＩＬＥＤ :１ＳＣＰＴＥＳＴ０６７７ＦＡＩＬＥＤ屏幕最下方提示按任意键继续 ,按照提示按任一键结…     

西门子M6740直线加速器S_9故障检修1例

故障现象机器在Ｘ线挡工作正常 ,电子线挡时 ,放上限光筒后 ,选好ＡＣＣＥＳＳＯＲＹＣＯＤＥ编码 ,ＡＣ ＣＥＳＳＯＲＹＩＮＴＥＲＬＯＣＫ灯不亮 ,同时ＡＣＣＲＥＡＤＦＡＵＬＴ灯也不亮 ,电子束无法出束。故障检修根据故障现象 ,首先检查小机头上限光筒ＦＵＬＬＩＮＳＥＲＴＩＯＮＬＯＣＫ开关及ＡＣＣＥＳＳＯＲＹ开关Ｓ１-Ｓ１７,经查未发现损坏及异常 ,顺着电路图往下找 ,信号从小机头出来首先来到Ｓ９ＰＣ１１板上 ,这里有两个信号 :一个是ＡＣＣＥＳＣＯＤＥＲＥＡＤＯＫＩＮＴＬＤ（ -） ,另一个是ＡＣＣＥＳＣＯＤＥＲＥＡＤＯＫ…     

MARQUETTE病房监护系统故障检修六例

我院ＩＣＵ病房购置美国ＭＡＲＱＵＥＴＴＥ公司ＥＧＬＮ—２０单色床边监护仪四台，ＣＳＣ２彩色中央台一个，九四年七月使用至今出现以下几例故障。故障一：彩色中央台ＣＳＣ２屏显开机闪一下即灭，再开机照样。拔下电源插头测输入端并没有开、短路故障，观察插头端部有打火痕迹，原因是此插头仅头部为导体，和国产插座接触不良，修理插座或者插头插得稍浅些即好。故障二：中央台显示器不显示无高点。打开显示器机壳通电检查，显象管灯丝亮，测“ＨＩＧＨＴＶＯＬＡＧＥＰＯＷＥＲＳＵＰＰＬＹ”盒输入低电压＋２４Ｖ正常，表明低电压电路…     

"产业化"与"市场化"的错位

医疗改革之弊,也许在于过度的“市场化”而非产业化。如果不对这两个概念加以区别,将棒子打在“产业化”上,其结果有可能贻害相关领域的改革深化     

The use of "impotence" and "frigidity": why has "impotence" survived

The negative connotations and decreased utility of the terms "impotence" and "frigidity" prompted an investigation of their use in the literature. Psychological Abstracts were reviewed from 1940 to 1983 for titles containing these terms. It was found that both impotence and frigidity titles fluctuated at low levels from 1940 to 1969. Frigidity titles then increased slightly, but dropped to zero after 1979. Impotence titles, however, have continued to increase at a significant rate. Classic sexual behavior and therapy works are reviewed to explain this discrepancy since both terms are equally inappropriate.     

The "lessons" of the Australian "heroin shortage"

Heroin use causes considerable harm to individual users including dependence, fatal and nonfatal overdose, mental health problems, and blood borne virus transmission. It also adversely affects the community through drug dealing, property crime and reduced public amenity. During the mid to late 1990s in Australia the prevalence of heroin use increased as reflected in steeply rising overdose deaths. In January 2001, there were reports of an unpredicted and unprecedented reduction in heroin supply with an abrupt onset in all Australian jurisdictions. The shortage was most marked in New South Wales, the State with the largest heroin market, which saw increases in price, dramatic decreases in purity at the street level, and reductions in the ease with which injecting drug users reported being able to obtain the drug. The abrupt onset of the shortage and a subsequent dramatic reduction in overdose deaths prompted national debate about the causes of the shortage and later international debate about the policy significance of what has come to be called the "Australian heroin shortage". In this paper we summarise insights from four years' research into the causes, consequences and policy implications of the "heroin shortage".     

耐多药结核病患者"知""信""行"护理干预模式研究

目的评价耐多药结核病患者“知、信、行”护理干预模式的效果。方法将60例耐多药结核病患者随机分成研究组和对照组各30例,对照组采用规则抗结核治疗和常规护理,研究组实施“知、信、行”护理干预。结果研究组知识、信念、行为明显高于对照组;12个月痰菌阴转率为83．3％、患者病灶吸收率81．3％、空洞闭合率55．6％,明显高于对照组;二者与对照组比较差异有显著意义。结论采用“知、信、行”护理干预模式,能有效地提高耐多药结核病患者的治疗疗效,改善其生活质量。     

Diagnosing "dayans" and "demons"

The new ?Witch Craft Prevention Bill? prohibiting witch hunting was passed in Bihar, India, in reaction to the branding and subsequent killing of more than 500 helpless women as "dayans" (witches) in the past 7 years. Most of them were single, widows, or deserted women victimized by the pathological greed of some of the male members of their families or by some powerful persons in the village community interested in claiming their property. Even with the passage of the bill, though, most of these crimes will remain unpunished because the community is an accomplice in them, and they tend not to be reported. What is needed overall is socioeconomic and political development that will lead to the empowerment of women to ensure that there will be an end to the cruel and inhuman activities (such as witch hunting) instigated by traditional healers or "Ojhas".     

Cultural characteristics of "high" and "low" performing hospitals

PURPOSE: To compare and contrast the cultural characteristics of "high" and "low" performing hospitals in the UK National Health Service (NHS). DESIGN/METHODOLOGY/APPROACH: A multiple case study design incorporating a purposeful sample of "low" and "high" performing acute hospital Trusts, as assessed by the star performance rating system. FINDINGS: These case studies suggest that "high" and "low" performing acute hospital organisations may be very different environments in which to work. Although each case possessed its own unique character, significant patternings were observed within cases grouped by performance to suggest considerable cultural divergence. The key points of divergence can be grouped under four main headings: leadership and management orientation; accountability and information systems; human resources policies; and relationships within the local health economy. PRACTICAL IMPLICATIONS: As with any study, interpretation of findings should be tempered with a degree of caution because of methodological considerations. First, there are the limitations of case study which proceeds on the basis of theoretical rather than quantitative generalisation. Second, organisational culture was assessed by exploring the views of middle and senior managers. While one should in no way suggest that such an approach can capture all important cultural characteristics of organisations, it is believed that it may be at least partially justified, given the agenda-setting powers and influence of the senior management team. Finally "star" performance measures are far from a perfect measure of organisational performance. Despite such reservations, the findings indicate that organisational culture is associated in a variety of non-trivial ways with the measured performance of hospital organisations. ORIGINALITY/VALUE: Highlights considerable cultural divergence within UK NHS hospitals.