电路图-增份三星w899原厂

电子工-10万份高电子工-10万份高端产品PCB文件Level3Re原理图更新最快-不断更新。。 电子工程师-10万份高端产品PCB文件和原理图共享.r最快的-不断更新。。。8-1.BlockLevel3Level3epai师-10万份高端产品PCB文件和原理图共原理图更新最快-不断更新。。 电子工-10万份高电子工-10万份高端产品PCB文件Level3Re原理图更新最快-不断更新。。 8-2.PCB8-2-1.8-2-1.checktheinitial9-1.Power''PowerOn'doesnotcheckcurrentChecktheBatteryVoltageismorethan3.3VCheckU600(PMIC)andPoweronvoltage(C616>1.2V,C617>1.1V,C618>1.8V,C620,>1.2VC626>ChecktheClockatOSC600thatFrequencyis32KChecktheclockgenerationcircuit(relatedtoOSC600)Checktheproblempoint(short,open,crackandIfPMIChasproblem,changeChangetheBattery(Becauseofbatt.powerlow)Downloadcheckthecurrent8-2.InitialInitialThepin#1,2ofU703=swingproperly1.8Vand0V?Thepin#11,12ofU703=swingproperly2.8Vand0V?AP_PS_HOLD(TPAP_PSHLED)andAP_N_RST_IN(R604)="low→Thereis32.768KHzwaveformsatOSC600R718>=Thereare24MHzwaveformsatOSC500and19.2MHzwaveformsatOSC700,TCX100LCDdisplaySoundisChecktheAudioPart(short,crack,ChecktheLCDpart(short,crack,ReplaceOSC500andOSC700,CheckUCP700andrelatedparts(short,crack,ReplaceCheckU600(crack,open,(ifU600hassomeproblem,itistobecheckU703andU501andrelatedparts(short,crack,etc)8-3.ChargingAbnormalAbnormalchargingCheckIFC400pin#1whethervoltagereadingisgreaterthanCheckU600DCINwhether5VismeasuredBatteryisApplyHeatoverorReplaceU600usingaResolderorReplaceCheckthe(TAmaynotbeconnected 8-4.5M"Camera""Camera"functiondoesnotChecktheCameraconnectoronMainPBACheckthevoltage 8,C630,C459=C631,C632,C633=1.8V,C629,C619=1.2VCheckF402Pin1isCheckU501relatedtoResolderU406,U600orchangeReconnecttheReplacethecameraTrywithnewMotorMotorMotordoesnotmotorconnectorChecktheMotorChecktheMotordriverandneighboringcircuitsCDMAPowerIIstChecktheconsumptionmorethanTR301#3PinHighChecktheVMSMC_1.3,VRF_2.25V,VMPLL_1.3V,MSME_1.8V,VMSMA_2.1V,VMSMP_2.6V,VRUIM_2.85V,ChecktheClockChecktheresetCheckUCP300,D301andneighboringcircuits.CheckTCX100,OSC300andneighboringcircuits.CheckUCP300andneighboringCheckTR301andneighboringDownloadBinaryGSMPowerIIstChecktheconsumptionmorethanQ700#3PinHightoChecktheC715(1.2V),C718(2.3V),C742(2.85V),C743(2.85V),C730(2.2V),C731(2.6V),ChecktheChecktheresetCheckUCP700,D702andneighboringcircuits.CheckOSC700,OSC701andneighboringcircuits.CheckUCP700-2andneighboringCheckTR301andneighboringDownloadBinary LCDLCDdoesHEA202connectorChecktheLCDC615(3.0V),ChecktheLCDChecktheReplaceorresolderingifChecktheU600(C718,C728)relationcircuitReplaceorresolderingifChecktheHEA202ReplaceorresolderingifTouchsensingTouchsensingnotHEA202connectorChecktheTSPC20(2.8V),ChecktheandTSP_SDA_2.8VSignalHigh?ChecktheHEA202ReplaceorresolderingifCheckChecktheU13(C20,C21)relationcircuitReplaceorresolderingifChecktheChecktheU501relationcircuitReplaceorresolderingifSpeakerSpeakerdoesnotTheSPK&FPCB,TheSPK_OUTNsignalsignalline,ofUCD400,OK?Changeintonewboard&RetryCheckPowerlineandneighboringReplaceorresolderingifChecktwosignallineandneighboringReplaceorresolderingifchangethespeakerChecktwosignallineandneighboringReplaceorresolderingifMicMicMicdoesnotVMICBIASisChecktheofUCD400Changeintonewboard&RetryChecktheMIC_Pline,neighboringcircuitsandFPCBReplaceorresolderingifrequired.CheckU405&neighboringcircuits.ReplaceorresolderingifCheckPowerlineandneighboringReplaceorresolderingif TouchKeydoesnotTouchKeydoesnotChecktheKeyChecktheKeyChecktheSCL,OKkey_N,INT_NJointtheKeyPBAChangeChangetheKeyCheckChecktheSCL,SDA,OKkey_N,INT_NLines,neighboringcircuitsandCONTINUOUSRXCONTINUOUSRXONRFINPUT:700CHAMP:-50dBmNORMALNORMALcatchtheCheckL301≤-65dBmCheckL100≤-65dBmCheckthevoltage{R306=V_BAT?}&{C359=2.8V&{C351=2.1V?}&{C357=2.85V?}&{C348=2.85V?}Checkthevoltageat1.5V±0resolderorchangeresolderorchangeCHECKL301,C337,C385,L102,C104,F100,C100,C106CHECKCN100,L113,C117,F103,C114,L115,F105Checkthefreq.at:19.2MHzchangeorresolderCDMAReceiverisresolderorchangeLevel3epaiLevel3epai师-10万份高端产品PCB文件和原理图共原理图更新最快-不断更新。。 电子工-10万份高电子工-10万份高端产品PCB文件Level3Re原理图更新最快-不断更新。。 Level3Level3epai师-10万份高端产品PCB文件和原理图共原理图更新最快-不断更新。。 8-CONTINOUSTXONCONDITIONTXPOWERPDM:60CODEAPPLIEDCDMACH:700chCONTINOUSTXONCONDITIONTXPOWERPDM:60CODEAPPLIEDCDMACH:700chRBW:100KHzVBW:100KHzSPAN:10MHzREFLEV.:10dBmATT.:20dBCheckCheckthepoweratC115.Over0dBmChecktheVoltageatL109=3.36V?ChecktheVoltageatC121=2.6V?IfC122isonHighState,ChangeTR100resolderorchangeU102,L116CHECKsolderedC338,C113,CheckC119isonHighState?CheckC118Over20dBmCheckC120Over20dBmCheckC117Over20dBmCheckthevoltage{R306=V_BAT?}&{C359=2.8V&{C349=2.1V?}&{C357=2.85VChangeCheckC114,F105,resolderorchangeChangeChangeChangeChangeCheckCheckthefreq.at:19.2MHzCDMATransmitterischangeorresolder电子工-10万份高电子工-10万份高端产品PCB文件Level3Re原理图更新最快-不断更新。。 Level3Level3epai师-10万份高端产品PCB文件和原理图共原理图更新最快-不断更新。。 8-15.BT/WiFiBT/WiFiisnotCheckBTorWiFifunctionChecktheVoltageonC140=2.8VCheck38.4MHzClockatChecktheVoltageonL200=ChecktheStatusofC204,C208,ResolderorReplaceResolderorReplaceC204,L208,ResolderorchangeCheckCheckAPEnableBTorWiFiChangeC802,L801,8-16.GSM900**IfyouchecktherxCheckthenotonlyRFDevicebutalsoresistor,inductorandContinuousContinuousRXONRFInput:62AMP:-NORMALCatchthechannelCheckRFSignalC801≥-C802CheckPin#1,2≥-55dBm?ReplaceF800,ReplaceCheckantennacontact(CN800,C800)ChangeC803,L803,8-17DCS1800**IfyouchecktherxCheckthenotonlyRFDevicebutalsoresistor,inductorandContinuousContinuousRXONRFInput:698AMP:-NORMALCatchthechannelCheckRFSignalC801≥-C803CheckPin#1,2≥-55dBm?ReplaceF800,ReplaceCheckantennacontactChangeC804,L805,8-18PCS1900**IfyouchecktherxCheckthenotonlyRFDevicebutalsoresistor,inductorandContinuousContinuousRXONRFInput:661AMP:-NORMALCatchthechannelCheckRFSignalC801≥-C804CheckPin#1,2≥-55dBm?ReplaceF800,ReplaceCheckantennacontact(CN800,C800)Checkantennacontact(CN800,C800)8-19.GSM900**IfyouchecktheTxCheckthenotonlyRFDevicebutalsoresistor,inductorandTxTx(Level:5)batteryvoltage:3.8VCheckRFSignalC812≒6dBmCheckRFSignalC810Pin#1≥31.5dBmCheckRFSignalC1123Pin#1,2≥31.5dBmNORMALRFSignalRFS800≥31.5dBmReplaceF800,C801,ReplaceC810,L808,C809,ReplaceReplaceF801,L809,C811,Checkantennacontact(CN800,C800)8-20DCS1800**IfyouchecktheTxCheckthenotonlyRFDevicebutalsoresistor,inductorandTxTx(Level:0)batteryvoltage:3.8VCheckRFSignalR1102Pin#1≒6dBm?CheckRFSignalC808Pin#1≥28.5dBmCheckRFSignalPin#1,2≥28.5dBm?NORMALRFSign