明基G781显示器维修手册

G781V1.02003/04CharlesZHouLeonLIuCharlesZYan1.------------------------------------------------------------12.--------------------------------------------------------33.------------------------------------------------------------44.-----------------------------------------------------------------65.---------------------------------------------------------------76.------------------------------------------------------87.-------------------------------------------------------------98.---------------------------------------------------------------99.----------------------------------------------------1310.IC--------------------------------------------------------------1911.----------------------------------------------------------2212.G781ECN---------------------------------------------------231.1.1.OKN.A90~264VAC/47~63Hz90~264VAC2.0ArmsOn75WmaxLED:230VACDPMS//5WLED:110VAC/50Hz40Amppeakcold-start264VAC/50Hz3.5mA:1800mmColor:FlintGrayKC-0031.2.OKN.A/700mV/75OhmTTL-Positive/Negative0.7sH-syncwidth25%ofHperiod2sV-syncwidth400sD-Sub1.5M+/-20mm1.3.31~86KHz50~120Hz1.4.OKN.A135MHz1280x1024/5.5nsDDCDDC1/2B1.5.No.:6No.:10Fh(KHz)/Fv(Hz)OKN.AVGA400640x40031.47KHz/70HzVGA480640x48031.47KHz/59.94HzSVGA5800x60053.67KHz/85HzUVGA71024x76860.023KHz/75.029HzUVGA81024x76868.68KHz/85HzWS71280x102479.98KHz/75Hz2.2.1.X2.2.2.3.***2.4.2.5.XXX28KVX3.Exit//Enter3.1Exit:3.2/:3.3/:3.4Enter:3.5:/3.6()()EnterRecallOSDOSD4.5.6.160.90003.00x1256.05900.02xCRT171347.90003.00x*4455.90002.00xVideo*1586.PA526.160*4686.00010.161*1786.00046.280CRT*4845.71502.00**1919.00062.****11040.90501.00*LABELSPEC*11131.90202.00xVideo*11239.90702.****11360.90801.02x*11455.90001.00**11550.90703.00*CRT*11633.90701.00**11786.ED424.8R0*31860.90231.00x*11945.61003.00**12042.90245.001*22142.90243.00x*32242.75213.0011*42342.72801.0012*12431.90001.00x*12542.72704.001*12648.90103.s0xTCO*12740.71608.01x*12829303171.2.3.4./VideoCRT5.6.CRTVideo7.8.9.CRTCRT10.11.VideoVideo12.13.88.1.18.1.2AVINPUTRFIFILTERDEGAUSSCIRCUITRECTIFIERFILTERSWITCHINGFLEMENTISOLATIONTRANSFORMEROUTPUTRECTIFIERANDFLEMENTFEEDBACKCONTROLCIRCUITPOWERSAVINGCONTROL8.2.18.2.2H-SYNC/V-SYNCDIGITALCONTROLLERTILTCIRCUITROTATIONI2CBUSTDA4856VERTICALDEFLECTIONOUTPUTICTDA4866TDA4866DYNAMICREGULATIONFEEDBACKH-SIZECOMPENSATIONH-SIZEG1&SPOTKILLERCIRCUITDYNAMICFOCUSHORIZONTALDEFLECTIONFEEDBACKSHUTDOWNCIRCUITSTEPUPFORB+B+8.3.18.3.2PREAMPCKTDCRESTORECRTDRIVERBRIGHTNESS/CHANGEMODEBLANK/VBLANK/SPOTKILLER///H-PULESCONTRASTDEANCURRENTBEANABL8.4.1CPU8.4.2CPURESTCIRCUITCONTROLPANELEEPROMDEGAUSSINGBLANKINGSC0-SC2OSDICICTODEFLECTIONCIRCUITRS23212MHz9.9.1CPUOSD9.2OSD9.39.49.59.6IC2019.79.89.910.IC10.1UC384210.2TDA485610.2.110.2.211.12.G781BenQModelUpgradeSummaryMinor:ConditionalEngineeringChanging2001/01/03Model:G781Major:Mustbechangedby100%RMAreturnbaseUpdateDateProductsTypeCustomerECN/EARNo.ReasonActionConditionUpgradeMarkPhaseinDateStatusMonitorAllSMO7378C-9-009QREbugsolutionpahsein1.ChangeR222from1.2k/0.25wto4.7k/0.25w(13.47232.012)2.MoveC611(3300p250v)toC610Period:ManufactureDatebeforeSep-20002000-8-24MinorMonitorAllSMO7378C-17-0151.G781HVshutdownissue2.Foldissue(Lightbaronrightside)1.ChangeC204from4.7uto10u(09.70614.01W)2.ChangeR322from5.6ohmto47ohm(13.47035.07E)atthesametimechangeC309from5600Pto5100P(11.5123R.T5K)Period:ManufactureDatebeforeNov-20002000-11-14MinorMonitorAllSMO7378C-21-0211.Lowfrequencyunlockwhenchangemodel2.Moirecanbeseenin800X600/85Hzandwindowscyanpattern3.1024X768/100Hzcan'tfullscreen1.ChangeR215from2.55k(1%)to2.67k(14.26715.012)2.ModifyIC802checksumfrom049BHto01FDH3.ModifyIC801checksumfromD42DHtoD591HPeriod:ManufactureDatebeforeDEC-20002000-12-20MinorMonitorAllSMO7378C-22-019G781or78GABLabnormalatcut-offpointwhenpoweronBacksolderaDiscCapatC355(08.10224.13W)andparalleltoZD301Period:ManufactureDatebeforeDEC-20002000-12-14MinorMonitorAllSMO7378C-24-023G781HOTfailuresolution1.AddonSchottkyDiode1N5817(06.1Q002.110)negativeatR236,positiveatC212negativeside.ChangeC201to2200U(09.2281D.01C).2.ChangeC303from.01Uto22U(09.22614.01W)3.DeleteJ1244.ChangeC705fromtoCAPEL1000U63V(09.1081.08D)Period:ManufactureDatebeforeDEC-20002000-12-14MinorProductsTypeCustomerECN/EARNo.ReasonActionConditionUpgradeMarkPhaseinDateStatusMonitorAllSMO7378C-34-034G781HOTfailureandarcingdamagesolution1.AddonDiodeSW1N4148100V(06.04148.040)atD205,positiveatR238.ChangeR238to15Kohm(13.15331.012).AddonH945PTO92TNPN(06.00945.01A)atQ211,AddRESCF10KOhm(13.10331.012)atR276,ChangeC303from22U50VtoCAPDISC0.1U50V(08.10414.25W),AddZD302(06.91R03.071),DeleteJ27,AddRESCF150Ohm(13.15133.012)atR3682.ChangeQ332toFETMOSIRFS740NC(06.00740.021)Period:ManufactureDatebeforeMay-20012001-5-21MinorMonitorAllSMO7378C-36-036FocusimproveforDFXCCRT.ChangeC328from1000Pto680PandR240from3Kto2.4K.Period:ManufactureDatebeforeJun-012001-6-19MinorMonitorAllSMO7378C-43-042Inproductionlinecan'tenterpowersavingasinoffmodel.1.ForbiduseIC602opto05.00123.010in7378modelandchangeto05.00721.010.2.PurgeJSI19.20208.011.Period:ManufactureDatebeforeOct-012001-10-12MinorMonitorAllSMOG