Samsung SGH-X430 User manual

SGH-X430
SERVICE
Manual
GSMTELEPHONECONTENTS
1.Specification
2.CircuitDescription
3.FlowChartofTroubleshooting
4.ExplodedViewsand PartsList
5.ElectricalPartsList
6.BlockDiagrams
7.PCB Diagrams
GSMTELEPHONE

ThisServiceManual isa propertyofSamsung
ElectronicsCo.,Ltd.
Anyunauthorized use ofManualcan bepunished
underapplicableInternationaland/ordomesticlaw.
ELECTRONICS
Samsung ElectronicsCo.,Ltd.December.2003
Printedin Korea.
CodeNo.:GH68-04389A
BASIC.
ⓒ

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1. SGH-X430 Specification
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GSM900
Phase1EGSM900 Phase2DCS1800 Phase1
Freq.Band[MHz]
Uplink/Downlink 890~915 935~960 880~915 925~960 1710~1785 1805~1880
ARFCNrange1~124 0~124 &975~1023 512~885
Tx/Rxspacing 45MHz45MHz95MHz
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~13dBm33dBm~5dBm30dBm~0dBm
PowerClass 5pcl~15pcl5pcl~19pcl0pcl~15pcl
Sensitivity-102dBm-102dBm-100dBm
TDMAMux 8 8 8
Cell Radius35Km35Km2Km
1. GSMGeneralSpecification

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1. SGH-X430 Specification
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TXPower
control levelGSM900
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
2. GSMTXpower class

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2. SGH-X430 Circuit Description
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1.SGH-X430 RFCircuit Description
1)RXPART
1.ASM(U201)
ðSwitchingTx, RxpathforGSM900,DCS1800 bylogic controlling.
2.ASM ControlLogic(U501,U502)
ðTruthTable
VC1VC2
GSMTxMode LH
DCSTxMode HL
GSM/DCSRxMode L L
3.FILTER
Toconvert ElectromagneticFieldWavetoAcousticWaveandthenpass the
specificfrequencyband.
-GSM FILTER (F100)
ðForfilteringthefrequencyband between925 ~960 MHz
-DCS FILTER (F101)
ðForfilteringthefrequencyband 1805 and 1880 MHz.
4.VCTCXO(OSC100)
To generatethe 13MHzreferenceclock todrivethelogic andRF.
Afteradditional process,thereferenceclock isapplied totheU100 RxIQ
demodulatorandTxIQmodulator.
TheoscillatorforRXIQdemodulatorandTxmodulatorarecontrolled by
serial datatoselectchannel and usefastlock mode forGPRShighclass
operation.

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2. SGH-X430 Circuit Description
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5.Si4205 (U100)
Thischipintegratesthree differential-input LNAs.
TheGSM inputsupportstheE-GSM,DCSinputsupportstheDCS1800,PCS
inputsupportsthePCS1900.TheLNAinputsare matched tothe 200 ohm
differential outputSAW filtersthrougheternal LCmatchingnetwork.
Image-rejectmixerdownconvertstheRFsignal toa100 KHzintermediate
frequency(IF)withtheRFLOfromSI4133Tfrequencysynthesizer.
TheRFLOfrequencyisbetween1737.8~1989.9MHz.
TheMixeroutput isamplified withananalog programmablegain
amplifier(PGA),whichiscontrolled byAGAIN.
Thequadrature IFsignal isdigitized with highresolutionA/Dconverts(ADC).
TheSI4205 down-convertsthe ADCoutput tobasebandwithadigital
100 KHzquadratureLOsignal.
Digital decimationand IIRfiltersperformchannelselectiontoremove blocking
andreferenceinterfacesignals.Afterchannelselection,the digital output is
scaled withadigital PGA,whichiscontrolled withtheDGAIN.DACsdrivea
differential analog signal ontotheRXIP, RXIN, RXQP, RXQNpins tointerface
tostandardanalog-inputbaseband IC.
2)TXPART
Baseband IQsignal fed into offsetPLL,thisfunctionisincluded inside
of U100 chip.
SI4205 chipgeneratesmodulatorsignal which powerlevelisabout1.5dBm
andfed intoPowerAmplifier(U200).
ThePAoutputpowerandpower rampingarewell controlled byAuto
PowerControl circuit.We useoffsetPLL below,
Modulation
Spectrum
200kHzoffset
30 kHzbandwidth
GSM-35dBc
DCS -35dBc
PCS -35dBc
400kHzoffset
30 kHzbandwidth
GSM-66dBc
DCS -65dBc
PCS -66dBc
600kHz~1.8MHzoffset
30 kHzbandwidth
GSM-75dBc
DCS -68dBc
PCS -75dBc

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2. SGH-X430 Circuit Description
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2.BasebandCircuit descriptionof SGH-X430
1)PSC2106
1.PowerManagement
Sevenlow-dropout regulatorsdesigned specificallyforGSM applications
power theterminal andhelpensureoptimal system performanceandlong
batterylife.
AprogrammableLDOprovides support for1.8V,3.0VSIMs,whilea
self-resetting,electronicallyfused switchsuppliespower toexternal
accessories.Ancillarysupport functions,suchastwoLEDdriversandtwo
call-alert drivers, aidinreducingbothboardarea andsystem complexity.
Afour-wireserial interface unit(SIU)providesaccess tocontrol and
configurationregisters.Thisinterfacegivesamicroprocessorfull controlof
thePSC2106 and enables system designerstomaximize bothstandbyand
talk times. Error reportingisprovided via aninterruptsignal andstatus
register.
Supervisoryfunctions.includingaresetgenerator, aninputvoltage monitor,
andathermal monitor,support reliablesystem design.Thesefunctions
worktogether toensurepropersystem behaviorduringstart-upor inthe
eventofafaultcondition(lowmicroprocessorvoltage,insufficientbattery
energy,orexcessive dietemperature).
2.Battery ChargeManagement
A batterycharge managementblock, incorporatinganinternal PMOSswitch,
andan8-bit ADC,providesfast,efficientcharging ofsingle-cell Li-Ion
battery.Used inconjunctionwitha current-limited voltagesource,thisblock
safelyconditions near-deadcellsandprovidestheoptionofhaving
fast-chargeandtop-off controlled internallyorbythesystem's
microprocessor.
3.Backlight LED Driver
The backlight LEDdriver isa low-side,programmablecurrentsource
designed tocontrolthe brightness ofthekeyboardandLCDillumination.
LED1_DRViscontrolled viaLED1_[0:2]andcanbe programmed tosink
from 15mA to60mA in7.5mA steps.LED2_DRViscontrolled viaLED2_
[0:2]andcanbe programmed tosinkfrom 5mA to40mA in5mA steps.
BothLEDdriversarecapableofsinkingtheir maximum outputcurrentata
worst-case maximum outputvoltageof0.6V.Forefficientuse,theLEDsis
connected betweenthe batteryandtheLED_DRVoutput.

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4.VibratorMotorDriver
Thevibratormotordriver isa low-side,programmablevoltagesource
designed todriveasmall dcmotor thatsilentlyalertsthe userofan
incomingcall. The driver iscontrolled byVIB[0:1]andcanbe programmed
tomaintainamotorvoltageof1.3V,2.0V,or2.5V(relativetoVBAT)while
sinkingupto100mA.Forefficientuse,thevibratormotorshould be
connected betweenthe mainbatteryandtheVIB_DRVoutput.
2)Connector
1.LCDConnector
LCDisconsisted ofmainLCD(color65K UFBLCD).Chipselectsignalsof
EMIpart inthetrident,CLCD_EN, canenable mainLCD.LED_ENsignal
enableswhiteLEDofmainLCDandEL_ENsignal enablesdimmingmode
ofmainLCD.
Thesetwosignalsarefrom IO part oftheDSPinthetrident. RST signal
from 2106 initiatestheinitial process oftheLCD.
16-bit data lines(D(0)~D(15)) transfersdata andcommandstoLCDthrough
emi_filter.Data andcommandsuse A(2)signal. Ifthis signal ishigh,Inputs
toLCDarecommands.Ifit islow,InputstoLCDare data. Thesignal
whichinformstheinputoroutputstatetoLCD,isrequired.But this system
is notnecessarythis signal. SoCP_WENsignal isused towrite dataor
commandstoLCD.
Powersignalsfor LCDare+VBATT andVCCD.
SPK1PandSPK1N fromCSP1093 are used foraudiospeaker.And
YMU_VIB_EN fromMA-3 enablesthe motor.
2.JTAGConnector
TridenthastwoJTAGportswhichareforARMcoreandDSP
core(DSP16000).Sothis system hastwoport connectorfor theseports.
Pins' initialsforARMcoreare'CP_' andpins' initialsforDSPcoreare
'DSP_'.
CP_TDIandDSP_TDIsignal are used for inputofdata. CP_TDOand
DSP_TDOsignalsare used for theoutputofthe data. CP_TCKand
DSP_TCKsignalsare used forclock because JTAGcommunicationisa
synchronous.CP_TMS andDSP_TMS signalsaretestmode signals.The
difference betweentheseistheRESET_INT signal whichisforARMcore
RESET.

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3.Keypadconnector
Thisisconsisted ofkeyinterfacepins inthetrident,KEY_ROW[0~4]and
KEY_COL[0~4].Thesesignalscomposethe matrix. Resultofmatrixinforms
thekeystatustokeyinterfaceinthetrident.Some pins areconnected to
varistorforESD protection.Andpoweron/off keyis seperated fromthe
matrix.
Sopoweron/off signal isconnected with PSC2106 toenablePSC2106.
SVC_GREEN,SVC_REDandSVC_BLUE arefrom OCTLofCSP1093.
Thesesignalsdecide thecolorofLED,serviceindicator.
NinekeyLEDusethe+VBATT supplyvoltage.Theseareconnected to
BACKLIGHT signal inthePSC2106.
This signal enablesLEDswithcurrentcontrol. FLIP_SNS informsthestatus
of folder(openorclosed)tothetrident.Thisusesthehall effectIC,
A3210ELH.
A magnetundermainLCDenablesA3210ELHwhichisonthe mainPCB.
4. EMIFiltering
This system usestheEMIFilter toreducenoisefromLCD part.Some
controlsignalsareconnected toLCDwithoutEMIfiltering.
3)IFconnetor
It is23-pinconnector, and uses18-pinatpresent.Theyare designed touse
SDS,DEBUG,DLC-DETECT,JIG_ON,VEXT,VTEST,VF,+VBATT andGND.
Theyconnected topowersupplyIC,microprocessorandsignal processorIC.
4)Audio
AOUTAP,AOUTAN fromCSP1093 isconnected tothespeakervia analog
switch.AOUTBPand AOUTBNareconnected tothe ear-micspeakervia
ear-jack. MICINandMICOUTareconnected tothe mainMIC.And AUXINand
AUXOUTareconnected totheEar-mic.
YMU762MA3 isaLSIforportabletelephonethat iscapableofplayinghigh
qualitymusicbyutilizingFM synthesizerand ADPCMdecorder thatare
included inthisdevice.
Asasynthesis,YMU762MA3 isequipped 16 voiceswithdifferenttones.Since
the deviceiscapableofsimultaneouslygeneratinguptosynchronouswiththe
playoftheFM synthesizer, various sampled voicescanbe used as sound
effects.

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SincetheplaydataofYMU762MA3 areinterpreted atanytime throughFIFO,
thelengthofthe data(playingperiod)is notlimited,sothe devicecan
flexiblysupport application suchasincomingcall melodymusicdistribution
service.Thehardwaresequencerbuilt inthisdeviceallowsplaying ofthe
complexmusicwithoutgivingexcessiveloadtotheCPUoftheportable
telephones.Moreover,theregistersoftheFM synthesizercanbe operated
directlyfor real time soundgeneration, allowing,forexample,utilizationof
various sound effectswhenusingthegame softwareinstalled intheportable
telephone.
YMU762 includesaspeakeramplifier with highrippleremoval ratewhose
maximum output is550mW(SPVDD=3.6V).The deviceisalsoequipped with
conventional functionincludinga vibartoranda circuit forcontrollingLEDs
synchornouswithmusic.
For theheadphone,it isprovided withastereophonicoutput terminal.
For thepurposeofenablingYMU762MA3 todemonstarteitsfull capablities,
Yamahapurposetouse"SMAF:SyntheticmusicMobile ApplicationFormat"asa
datadistributionformat that iscompatiblewihtmultimedia. SincetheSMAF
takesastructurethatsetsimportanceonthesynchronizationbetween sound
andimages, variouscontentscanbe writtenintoit includingincomingcall
melodywithwordsthatcanbe used for traningkaraoke, andcommercial
channelthatcombinestexts,imagesandsounds, andothers.Thehardware
sequencerofYMU762MA3 directlyinterpretsandplaysblocksrelevant to
systhesis(playingmusic andreproducingADPCMwithFM synthesizer)thatare
included indatadistributed inSMAF.
5)Memory
This system usesSHARP's memory,LRS1828.
It isconsisted of128Mbitsflashmemoryand 32MbitsSCRAM.Ithas16 bit
data line,D[0~15]whichisconnected totrident,LCDorCSP1093.Ithas22
bit address lines,A[1~22].Theyareconnected too.CP_CSROMENand
CO_CSROM2ENsignals, chipselectsignalsinthetridentenabletwomemories.
Theyuse 3 voltsupplyvoltage,VCCD.
Duringwrtingprocess,CP_WENislowandit enableswritingprocess toflash
memoryandSCRAM.Duringreadingprocess,CP_OENislowandit output
informationwhichislocated at theaddress fromthetrident intheflash
memoryorSCRAMtodata lines. Eachchipselectsignalsinthetridentselect
memoryamong2flashmemoryandSCRAM. Reading or writingprocedureis
processed afterCP_WENorCP_OENisenabled.MemoriesuseFLASH_RESET,
whichisbuffered signal ofRESETfromPSC2106,forESD protection.A[0]
signal enableslowerbyteof SCRAMandUPPER_BYTEsignal enableshigher
byteof SCRAM.