Samsung SGH x495 - Cell Phone - T-Mobile User manual

GSMTELEPHONE
SGH-X495
GSMTELEPHONECONTENTS
1.Specification
2.Circuit Description
3. ExplodedViews and PartsList
4. ElectricalPartsList
5.BlockDiagrams
6.PCB Diagrams
7. FlowChartofTroubleshooting

Samsung ElectronicsCo.,Ltd.June.2005
Printedin Korea.
CodeNo.:GH68-07423A
BASIC.
T
hisServiceManual isa propertyofSamsung ElectronicsCo.,Ltd.
A
nyunauthorized use ofManualcan bepunished underapplicable
I
nternationaland/ordomesticlaw.
ⓒ

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1. Specification
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1-1
GSM850
Phase1DCS1800 Phase1PC1900 Phase1
Freq.Band[MHz]
Uplink/Downlink 824~849 869~894 1710~1785 1805~1880 1850~1910 1930~1990
ARFCNrange128~251 512~885 512~810
Tx/Rxspacing 45MHz95MHz80MHz
Mod.Bit rate/
Bit Period 270.833kbps 3.692us270.833kbps 3.692us270.833kbps 3.692us
TimeSlot
Period/FramePeriod 576.9us 4.615ms576.9us 4.615ms576.9us 4.615ms
Modulation 0.3GMSK0.3GMSK0.3GMSK
MS Power33dBm~5dBm30dBm~0dBm30dBm~0dBm
PowerClass 5pcl~19pcl0pcl~15pcl0pcl~15pcl
Sensitivity-102dBm-100dBm-100dBm
TDMAMux 8 8 8
Cell Radius35Km2Km2Km
1-1.GSMGeneralSpecification

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Specification
1-2
TXPower
control levelGSM850
5 33±2 dBm
6 31±2 dBm
7 29±2 dBm
8 27±2 dBm
9 25±2 dBm
10 23±2 dBm
11 21±2 dBm
12 19±2 dBm
13 17±2 dBm
14 15±2 dBm
15 13±2 dBm
16 11±3 dBm
17 9±3dBm
18 7±3 dBm
19 5±3 dBm
TXPower
control levelDCS1800
0 30±3 dBm
1 28±3 dBm
2 26±3 dBm
3 24±3 dBm
4 22±3 dBm
5 20±3 dBm
6 18±3 dBm
7 16±3 dBm
8 14±3 dBm
9 12±4 dBm
10 10±4 dBm
11 8±4dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
15 0±5 dBm
1-2.GSMTXpowerclass
TXPower
control levelPCS1900
0 30±3 dBm
1 28±3 dBm
2 26±3 dBm
3 24±3 dBm
4 22±3 dBm
5 20±3 dBm
6 18±3 dBm
7 16±3 dBm
8 14±3 dBm
9 12±4 dBm
10 10±4 dBm
11 8±4dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
15 0±5 dBm

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2. Circuit Description
2-1
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2-1.SGH-X495 RFCircuitDescription
2-1-1.RX PART
-ASM(U100)→Switching Tx,Rx pathforGSM850,DCS1800,PCS1900 by logic controlling.
-ASMControlLogic(U100)→TruthTable
VC1VC2VC3
TxMode(GSM850)HL L
TxMode(DCS1800/1900)LHL
RxMode(GSM850)L L L
RxMode(DCS1800)L L L
RxMode(PCS1900)L L H
-FILTER
ToconvertElectromagneticFieldWavetoAcousticWave and then pass thespecificfrequency band.
-GSMFILTER(F101)→For filtering thefrequency band between 869 and 894 MHz
-DCS FILTER(F102)→For filtering thefrequency band between 1805 and 1880 MHz.
-PCS FILTER(F100)→For filtering thefrequency band between 1930 and 1990 MHz.
-VC-TCXO (OSC101)
Thismodulegeneratesthe26MHzreference clockto drivethelogic and RF.Afterdivision by twoareference clock of
13MHzis suppliedtotheotherpartsofthesystemthrough thepinCLKOUT.Afteradditionalprocess,thereference
clockappliestotheU100 RxIQdemodulatorand TxIQmodulator.And then,theoscillatoriscontrolled by serialdata
toselectchanneland usefast lockmodeforGPRShigh class operation.
-Transceiver (U101)
Thereceiver front-end whichamplifiestheGSM,DCSaerialsignal,convertsthe chosenchanneldowntoalowIFsignal
of100 kHz.Thefirststagesaresymmetrical lownoise amplifiers(LNAs).TheLNAsarefollowed by anIQdownmixer.
Itconsistsoftwomixersin parallelbutdriven by quadratureoutofphaseLOsignals.TheIn phase(I) and Quadrature
phase(Q) IFsignalsarelowpass filteredto provideprotection fromhigh frequency offset interferes.ThelowIFIand Q
signalsarethenfedintothe channelfilter.Thefront-end lowIFIand Qoutputsentertheintegrated bandpass channel
filterwith provision for five8 dBgainstepsinfrontofthefilter.
2-1-2.TX PART
Iand Qbaseband signalsare appliedtotheIQmodulatorthatshiftsthemodulation spectrumup tothetransmit IF.It is
designedforlowharmonicdistortion,lowcarrierleakage and high imagerejection to keepthephase erroras small as
possible.

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CircuitDescription
2-2
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Themodulatorisloadedat itsIFoutputby anintegratedlowpass filterthatsuppress unwantedspurspriorto get into
thephasedetector.The clock driveisgenerated by division oftheRFLOsignalprovidedforthetransmit offsetmixer.
Baseband IQsignalfedinto offsetPLL,thisfunction isincludedinsideofU101 chip.OSC100 chip generatesmodulator
signalwhich powerlevel isabout6.5dBmand fedintoPowerAmplifier(U102).ThePAoutputpowerand power ramping
arewell controlled by AutoPowerControlcircuit.WeuseoffsetPLL belowtable.
Modulation Spectrum
200kHzoffset
30 kHzbandwidth
GSM-35dBc
DCS-35dBc
400kHzoffset
30 kHzbandwidth
GSM-66dBc
DCS-65dBc
600kHz~1.8MHzoffset
30 kHzbandwidth
GSM-75dBc
DCS-68dBc
2-2.Baseband Circuitdescription ofSGH-X495
2-2-1.PCF50601
-PowerManagement
Tenlow-dropoutregulatorsdesignedspecificallyforGSMapplicationspowertheterminaland helpensureoptimalsystem
performance and long batterylife.Aprogrammableboostconverterprovides supportfor1.8V,3.0VSIMs,while a self-
resetting,electronicallyfusedswitchsuppliespowertoexternalaccessories.Ancillarysupportfunctions,suchasRTC
module and High VoltageChargepump,Clock generator,aidinreducing both boardarea and systemcomplexity.
I2C BUSserial interface providesaccess tocontroland configuration registers.Thisinterface givesamicroprocessor full
controlofthePCF50601 and enables systemdesignerstomaximize bothstandby and talktimes.
Supervisoryfunctions.including aresetgenerator,aninputvoltagemonitor,and atemperaturesensor,supportreliable
systemdesign.Thesefunctionsworktogethertoensurepropersystembehaviorduring start-up orinthe eventofafault
condition(lowmicroprocessorvoltage,insufficientbatteryenergy,orexcessivedietemperature).
-BacklightBrightness Modulator
TheBacklightBrightness Modulator(BBM)containsaprogrammablePulse-widthmodulator (PWM)and FET
tomodulatetheintensity ofaseriesofLED?sortocontrolaDC/DCconverterthatdrivesLCDbacklight.
Thisphone(SGH-X495)usePWMcontrol tocontrast thebacklightbrightness.
-ClockGenerator
TheClockGenerator(CG)generatesall clocksforinternaland externalusage.The32768 Hzcrystal
oscillatorprovidesanaccuratelowclockfrequencyfor thePCF50601 andothercircuitry.

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CircuitDescription
2-3
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2-2-2.LCD Connector
LCDisconsisted ofmainLCD(color65K UFBLCD)and sub LCD(B/WLCD).
ChipselectsignalsLCD_MAIN_CSand LCD_SUB_CS,canenableEachLCD.BACKLIGHTsignalenableswhiteLED
ofmainLCD."LCD_RESET"signal initiatestheresetprocess oftheLCD.
16-bit datalines(HD(0)~HD(15)) transfersdata and commandstoLCD.Data and commandsuse"HA(1)"signal.If this
signal islow,inputstoLCDare commands.If it ishigh,inputstoLCDaredata.
ThesignalwhichinformsthestateofLCDiswhetherinputoroutput,isrequired.But inthis system,thereisno input
statefromLCD.So only"HA(1)"signal isusedtoindicatewritedataorcommand toLCD.PowersignalsforLCDare
"VBATand "VDD3".
"SPK_P"and "SPK_N"areusedforaudiospeakercontaining voice ormelody.And "VDD_VIB"fromPCF50601
enablesthemotor.
2-2-3.Key
Thisisconsisted ofkeyinterface pinsamong OM6359,KBIO(0:7).Thesesignalscomposethematrix.Result ofmatrix
informsthekeystatusto keyinterface intheOM6359.Poweron/off keyis separatedfromthematrix.So poweron/off
signal isconnectedwithPCF50601 toenablePCF50601.TwelvekeyLEDsareusethe"VDD_KEY"as supply voltage.
"FLIP"informsthestatusof folder (open orclosed)totheOM6359.Thisusesthehall effectIC,A321ELH-SAMSUNG.
AmagnetundermainLCDenablesA321ELH-SAMSUNG.
2-2-4.EMIESDFilter
This systemusestheEMIESDfilter,EMIF09 to protectnoisefromIFCONNECTORpart.
2-2-5. IFconnetor
It is18-pinconnector.Theyaredesignedto useVBAT,V_EXT_CHARGE,TXD0,RXD0,RTS0,CTS0,JIG_REC,
CHARGER_OK,RXD1,TXD1,AUX_MIC,AUX_SPKand GND.Theyconnectedto powersupplyIC,microprocessor
and signalprocessor IC.
2-2-6.BatteryCharge Management
Acompleteconstant-current/constant-voltagelinearchargerisused forsinglecell lithium-ionbatteries.
IfTAconnected tophone,"+DCVOLT"enablechargerICandsupplycurrent tobattery.
Whenfaultconditioncaused,"CHG_ON"signal levelchangelowtohighandchargerICstopcharging
process.
2-2-7.Audio
EARP_Pand EARP_NfromOM6359 are connectedtothemainspeaker.MIC_Pand MIC_Nare connectedtothemain
MIC.YMU788 isasynthesizerLSI formobilephones.It isaLSIasaninput/outputdevice forsound sources,whichis
themobilephones,suchasMP3,AAC,etc,inaddition toringing-melodies.
Asasynthesis,YMU788 isequipped 32 voiceswith different tones.Since thedevice iscapableofsimultaneously
generating up tosynchronouswiththeplay oftheFMsynthesizer,various sampled voicescan beusedas sound effects.
Since theplay dataofYMU788 areinterpretedatanytimethrough FIFO,thelength ofthedata(playing period)isnot
limited,sothedevice canflexiblysupportapplication suchasincoming call melody musicdistribution service.

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CircuitDescription
2-4
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Thehardwaresequencerbuilt inthisdevice allowsplaying ofthe complexmusicwithoutgiving excessiveloadtothe
CPUoftheportabletelephones.
Forthepurposeofenabling YMU788 to demonstrateitsfull capabilities,Yamahapurposeto use"SMAF:Syntheticmusic
MobileApplication Format"asadatadistribution format that iscompatiblewithmultimedia.Since theSMAFtakesa
structurethatsetsimportance on thesynchronization betweensound and images,variouscontentscan bewrittenintoit
including incoming call melody withwordsthatcan beusedfortraining karaoke,and commercialchannel thatcombines
texts,imagesand sounds,and others.ThehardwaresequencerofYMU788 directlyinterpretsand playsblocksrelevant to
synthesis(playing music and reproducing ADPCMwithFMsynthesizer) thatareincludedin datadistributedinSMAF.
2-2-8.Memory
SignalsintheOM6359 enabletwomemories.They usetwo volt supply voltage,VDD3inthePCF50601 &VDD_1.9V
withaLDO.This systemusesIntel'smemory,RD38F3050LOZTQ0.It isconsisted of128MbitsflashNORmemoryand
64MbitsSRAM.Ithas16 bit dataline,HD[0~15]whichisconnectedtoOM6359.Ithas26 bit address lines,
HA[1~26].NCSFLASH&NCSRAMsignalsare chipselect.Writing process,HWR_Nislowand it enableswriting
process toflashmemoryand SRAM.During reading process,HRD_Nislowand it enablesreading process toflash
memoryand SRAM.Reading orwriting procedureisprocessedafterHWR_NorHRD_Nisenabled.
2-2-9. OM6359
OM6359 isconsisted ofARMcore and DSP core.Ithas8x1Kwordon-chip program/dataRAM,55 Kwords
on-chip programROMintheDSP.Ithas4K*32bitsROMand 2K*32bitsRAMintheARMcore.DSP isconsisted
ofKBS,JTAG,EMIand UART.ARMcoreisconsisted ofEMI,PIC(ProgrammableInterruptController),
reset/power/clock unit,DMAcontroller,TIC(TestInterface Controller),peripheralbridge,PPI,SSI(SynchronousSerial
Interface),ACC(Asynchronouscommunicationscontrollers),timer,ADC,RTC(Real-TimeClock)and keyboardinterface.
KBIO(0:7),address linesofDSP core and HD[0~15].HA[1~26],address linesofARMcore and HD[0~15],datalinesof
ARMcore are connectedtomemory,YMU788.
NCSRAM,NCSFLASHintheARMcore are connectedtoeachmemory.HWR_Nand HRD_Ncontrol theprocess of
memory.ExternalIRQ(InterruptReQuest)signalsfromeach units,suchas,PMUneedthe compatibleprocess.
KBIO[0~7] receivethestatusfromkeyand RXD0/TXD0areusedforthe communication using datalink
cable(DEBUG_DTR/RTS/TXD/RXD/CTS/DSR).
Ithas JTAG controlpins(TDI/TDO/TCK) forARMcore and DSP core.Itreceives13MHz clockinCKIpinfrom
externalTCXO.ADC(Analog toDigitalConvertor) partreceivesthestatusoftemperature,batterytype and battery voltage.
2-2-10.TOH2600DGI4KRA(26MHz)
This systemusesthe26MHzTCXO,TOH2600DGI4KRA,SEM.AFCcontrolsignalfromOM6359 controlsfrequency
from26MHzx-tal.The clock outputfrequency ofUAA3536 is13MHz.ThisclockisconnectedtoOM6359,YMU788.

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3.Exploded View and Parts List
3-1
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3-1. Exploded View
QIF01
QFR01
QSC14
QMP01
QKP01
QVO01
QME01
QAN02
QRE01
QCR11
QRF03
QMI01
QBA01
QFU01
QSP01
QMO01
QLC01
QFL01
QMW02
QSC01
QCR17
QRF01
QVK01

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Exploded view and PartList
3-2
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Location NO. Description SEC CODE
QAN02
ㅤ
INTENNA-SGHX495;IAPT0GDP4020HA,SGH-X GH42-00574A
QBA01
ㅤ
BATTERY-1000MAH,SIL,MAIN;BST471ASA,S GH43-01788A
QCR11
ㅤ
SCREW-MACHINE;PH,+,M1.7,L4,ZPC(BLK), 6001-001654
QCR17
ㅤ
SCREW-MACHINE;CH,+,M1.7,L5,ZPC(BLK), 6001-001639
QFL01
ㅤ
MEC-FOLDER LOWER;SGH-X495,EU,-,-,-,- GH75-06454A
QFR01
ㅤ
MEC-FRONT COVER;SGH-X495,EU,-,-,-,-, GH75-06966B
QFU01
ㅤ
MEC-FOLDER UPPER;SGH-X495,T-MOBILE,- GH75-06471B
QKP01
ㅤ
MEC-KEYPAD;SGH-X495,T-MOBILE,-,-,-,- GH75-06617A
QLC01
ㅤ
LCD-SGH-X497 MODULE;UG-12R168-C,SGH- GH07-00763A
QME01
ㅤ
UNIT-METAL DOME;SGH-X497,SSM5017P850 GH59-02046A
QMI01
ㅤ
MICROPHONE-ASSY-SGHX497;2,130~500uA, GH30-00198A
QMO01
ㅤ
MOTOR DC-SGHZ130;DMJBRK20C,SGH-Z130, GH31-00154D
QMP01
ㅤ
PBA MAIN-SGHX495;SGH-X495,TMB,USA,PB GH92-02214A
QMW02
ㅤ
PCT-WINDOW MAIN;SGH-X495,ACRYLIC SHE GH72-19918B
QRF01
ㅤ
MPR-RF SHEET;SGH-X495,PC SHEET 0.3T, GH74-14435C
QSC01
ㅤ
MPR-SCREW SHEET;SGH-X495,PC SHEET 0. GH74-13610B
QSC14
ㅤ
MPR-TAPE FRONT FPC;SGH-E330,3M 1352 GH74-08876A
QSP01
ㅤ
SPEAKER;0.5W,8ohm,89dB,800Hz,17X13mm 3001-001779
QVK01
ㅤ
UNIT-VOLUME KEY;SGH-X497,SSV5017P860 GH59-02053A
QVO01
ㅤ
MEC-VOLUME KEY;SGH-X495,T-MOBILE,-,- GH75-07274B
QRE01
ㅤ
MEC-REAR COVER;SGH-X495,USA,-,-,-,-, GH75-06959B
ㅤ
QRF03 PMO-EAR COVER;SGH-X495,PC W91543+ELA GH72-23535B
ㅤ
QIF01 PMO-IF COVER;SGH-X495,PC G73797+ELAS GH72-23556B
ㅤ
QMI03 RMO-RUBBER MIC REAR;SGH-X497,CR RUBB GH73-04847A
3-2. Parts List