IC200UEX064输入模块IC200UEX064输入模块IC200UEX064输入模块SIEMENS6SE3114维修实例故障现象：接通电源无反应，测560V直流电源正常，开关电源无输出。检查思路：该机采用UC3844作PWM调制，驱动大功率开关场效应管输出，查其退耦电容C56有轻微漏电，更换后试机一切正常。由于C56的漏电把UC3844的工作电源其中一部份旁路掉，并且供电限流电阻值较大（1M）UC3844无法达到启动阀值而误检测作欠压而不开机。普传5.5KW故障现象：接通电源无任何已通电迹象。故障检修：此故障可能为CPU本身的电源故障。打开机盖发现整流与输出的一体化大功率模块有裂开现象，细查此为人为造成，并无烧焦痕迹，但内部多处连线均已撬断损坏，无法再用。重新换上一块MUBW15-12A7后通电，显示出现EPERR，看来这才是真正的故障，应属于内存问题，更换AT89C56后正常西门子变频器电源维修一例故障现象：西门子变频器电源冷机时要等几钟才启动，热机时可即启动。检查分析：此电源用UC3842控制，能启动说明元器件没坏，但很可能性能下降，经测量UC3842电源端电解电容容量变少，换上新的电解电容反复试机正常。欧陆590直流调速器维修一例故障现象：欧陆590直流调速器不能调速。检查分析：经检查+10V电压基准电源为2V左右，-10V电压基准电源为-7V左右，查看有一IC发热很大，更换后-10V电源正常，但+10V电源为+13V，再测量此IC附近有2个贴片电阻烧断，更换后±10电源正常，接上马达试机调速运行正常。东元伺服控制器维修两例故障现象：东元伺服控制器主控板冷机正常，工作一段时间后元显示，但指示灯亮全亮。检查分析：通常冷机正常而热机不正常说明元器件基本正常，但不些器件性能下降所至，可能是电解电容漏电，令5V电源不稳，经查看此机器的出厂日期超过十年，超过十年的电解电容很易失效，换上所有全新的电解电容后反复试机正常。故障：东元伺服控制器显示“AL-15”报警，起动无输出。分析：查资料“AL-15”为过电流（软件）报警，经检查两个电流互感器均正常，试着屏闭智能模块报警输出端亦无效，触发模块能正常导通截止，后找来另一块主板换上，通电显示不正常，起动输出一个方向不稳，另一方向抖动，再检查模块其中一路输入端对电源正端阻值比其它输入端少很多，对应光耦不正常，经检查，确认光耦有问题，更换光耦后正常。伦茨伺服控制器显示过流故障现象：伦茨伺服控制器显示过流.检查分析：通常引起过流有真过流和假过流，真过流的原因有IG坏而形成三相输出与直流母线短路造成过流。第二种情况是三相输出间相间短路而造成过流。第三种情况是触发电路不正常而造成输出不平衡而造成过电流。假过电流的原因有电流互感器坏造成检测错误，有些电路光电耦合器坏引起检测信号不能传递也会显示过流。经测量IG坏，驱动电路的稳压保护二极管已烧坏，换好的元件带负载试机运行正常。TexasInstrumentsPM550-210PowerSupplyPM550210(UGC)NEWPANASONICServoDriveMQDA023A1ACNC/ROUTERASEABROWNBOVERIYB560103-CB/10USPPYB560103CB10CUTLERHAMMERHMCP400J5CNSFPHMCP400J5CASEABROWNBOVERIACS601-0006-4-​000B1500801USPPACS60100064000​B3ASEABROWNBOVERIDSDP-150USPPDSDP150QTY1PanasonicACServoDriverMSDA015A1AFreeShipTEXASINSTRUMENTS505-CP5434-FMSUSPP505CP5434FMSPanasonicMinasACServoMotorMQMA012A5F0190-26189ASEABROWNBOVERI3HAA3573-ACANSPP3HAA3573ACATEXASINSTRUMENTSPLC500-5022NSFP5005022PanasonicACServoMotor***102A1GFreeShipASEABROWNBOVERIACH401B04122USPPACH401B04122ASEABROWNBOVERIYB560103-CHNSFPYB560103CHNewinBox505-7028TexasInstruments/Si​emens5057028N741PANASONICACSERVODRIVERMDD203A1W200V50/60HZ2.0KW2500P/RHASEMILLTRONICS82211001NSFP82211001SQUARED9070-T3000D3USPP9070T3000D3TexasInstruments500-5031SIEMENS6SN1-145-1AA00​-0AA0NSFP6SN11451AA000A​A0TEXASINSTRUMENTSPLC305-8ADCNSFP3058ADCASEABROWNBOVERIRVS-6-100/120VNSFPRVS6100120VCONTROLTECHNIQUESDXM-316CUSPPDXM316CMEMOTEC30033107-000USPP30033107000SIEMENS6SN1-145-1AA00​-0AA0NSFP6SN11451AA000A​A0TEXASINSTRUMENTSPLC505-4616ANSPP5054616ATexasInstruments7MT900SQUARED9998-SL11NSFP9998SL11TEXASINSTRUMENTS500-5056MODULEDIGITALOUTPUT500SERIES5005056PanasonicACServoMotorM***082D1AASEABROWNBOVERIMFPMUSPPMFPMSIEMENSTI6ES5453-4UA12PLCNEWSIEMENS8GT2-005-0CA00USPP8GT20050CA00TexasInstrumentsTI500-2114RemoteBaseControllerALLENBRADLEY1361-R065-2-7USPP1361R06527PanasonicACServoDriver/MotorMSDA043A1AM***A042A1FASEABROWNBOVERI1SDA054335R1NSPP1SDA054335R1panasonicacservomotorMDM202A1CWithTsubakiNEWTexasInstruments500-505632PT24/110VOutput5005056TEXASINSTRUMENTSPLC505-6108AUSPP5056108ATEXASINSTRUMENTSPLC500-4010USPP5004010ASEABROWNBOVERI57360001-EF/1USPP57360001EF1TITEXASINSTRUMENTS530-1104CONTROLLERPLCMODULETexasInstruments5TI-1031-1PanasonicMFA020LE2NSCACServoMotorwith60daywarrantySIEMENS6SE6440-2AD27-​5CA1NSFP6SE64402AD275C​A1FOXBORO760CSA-2A-1NSFP760CSA2A1TEXASINSTRUMENTSPLC505-7340USPP5057340TEXASINSTRUMENTSPLC560-2820NSFP5602820PERCEPTRONCAMERADigitalCONTOURSENSOR916-4128FujiHensokukiCOGeardMotorMT-9-5.4-002LAPanasonicACServoMotorMQMA022P2BACCURAY18383-004USPP18383004TEXASINSTRUMENTSPLC505-5417NSPP5055417ASEABROWNBOVERIOESA-630D6PLUSPPOESA630D6PLASEABROWNBOVERI5735202-AUSPP5735202ATEXASINSTRUMENTSPLC7MT-400NSPP7MT400TEXASINSTRUMENTSPLC560-2120WUSPP5602120WPanasonicNachiACServoMotorMFMA552D5V35.5kWNEWTEXASINSTRUMENTSPLC505-ATM-0440NSPP505ATM0440ELECTROCRAFT9101-1133USPP91011133TexasInstruments500-5052SIEMENS6SE6-400-4BD24​-0FA0NSFP6SE64004BD240F​A0EDISONCONTROLS1010617-B400-A​3.0NSFP1010617B400A30)