Samsung SGH-P408 User manual

SGH-P408
SERVICE
Manual
GSMTELEPHONECONTENTS
1.Specification
2.CircuitDescription
3.FlowChartofTroubleshooting
4.ExplodedViewsand PartsList
5.ElectricalPartsList
6.BlockDiagrams
7.PCB Diagrams
GSMTELEPHONE
2
ABC DEF
MNO
GHI
PQRS WXYZ
JKL
TUV
3
456
78
0
9

ELECTRONICS
Samsung ElectronicsCo.,Ltd.JUNE.2003
Printedin Korea.
CodeNo.:GH68-03690A
BASIC.
ⓒ
ThisServiceManual isa propertyofSamsung ElectronicsCo.,Ltd.
Anyunauthorized use ofManualcan bepunished underapplicable
Internationaland/ordomesticlaw.

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1. SGH-P408 Specification
1-1
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GSM900
Phase1EGSM900 Phase2DCS1800 Phase1PCS1900
Freq.Band[MHz]
Uplink/Downlink 890~915 935~960 880~915 925~960 1710~1785 1805~1880 1850~1910 1930~1990
ARFCNrange1~124 0~124 &
975~1023 512~885 512~810
Tx/Rxspacing 45MHz45MHz95MHz80MHz
Mod.Bit rate/
Bit Period 270.833kbps 3.692us270.833kbps 3.692us270.833kbps 3.692us270.833kbps 3.692us
TimeSlot
Period/FramePeriod 576.9us 4.615ms576.9us 4.615ms576.9us 4.615ms576.9us 4.615ms
Modulation 0.3GMSK0.3GMSK0.3GMSK0.3GMSK
MS Power33dBm~13dBm33dBm~5dBm30dBm~0dBm30dBm~0dBm
PowerClass 5pcl~15pcl5pcl~19pcl0pcl~15pcl0pcl~15pcl
Sensitivity-102dBm-102dBm-100dBm-100dBm
TDMAMux 8 8 8 8
Cell Radius35Km35Km2Km-
1. GSMGeneralSpecification

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SGH-P408 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
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
2. GSMTXpower class

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2. SGH-P408 Circuit Description
2-1
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1.SGH-P408 RFCircuit Description
1)RXPART
1.ASM(U1005)
ð510SwitchingTx, RxpathforGSM900,DCS1800 andPCS1900 bylogic
controlling.
2.ASM ControlLogic(U701,U702,U703)
ðTruthTable
VC1VC2VC3
GSMTxMode HL L
DCS/PCSTxMode LHL
PCSRxMode L L H
GSM/DCSRxMode L L L
3.FILTER
Toconvert ElectromagneticFieldWavetoAcousticWaveandthenpass the
specificfrequencyband.
-GSM FILTER (C1003,C1004,L1001)
ðForfilteringthefrequencyband between925 ~960 MHz
-DCS FILTER (C1005,C1006,L1002)
ðForfilteringthefrequencyband 1805 and 1880 MHz.
-PCS SAW FILTER (F1003,C1009,C1010,L1006)
ðForfilteringthefrequencyband between1930 and 1990 MHz
4.TC-VCXO(OSC801)
To generatethe 13MHzreferenceclock todrivethelogic andRF.
Afteradditional process,thereferenceclock isapplied totheU900 RxIQ
demodulatorandTxIQmodulator.
TheoscillatorforRXIQdemodulatorandTxmodulatorarecontrolled by
serial datatoselectchannel and usefastlock mode forGPRShighclass
operation.

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SGH-P408 CircuitDescription
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5.Si4200 (U901)
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).
6.Si4201 (U900)
TheSI4201 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 U902 chip.
SI4200 chipgeneratesmodulatorsignal which powerlevelisabout1.5dBm
andfed intoPowerAmplifier(U1008).
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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SGH-P408 CircuitDescription
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2.BasebandCircuit descriptionof SGH-P408
1)PSC2106
1.PowerManagement
Sevenlow-dropout regulatorsdesigned specificallyforGSM applications
power theterminal andhelpensureoptimal system performanceandlong
batterylife.
Aprogrammable boostconverterprovides support for1.8V,3.0V, and 5.0V
SIMs,whileaself-resetting,electronicallyfused switchsuppliespower to
external accessories.Ancillarysupport functions,suchasanLEDdriverand
twocall-alert drivers, aidinreducingbothboardarea andsystem
complexity.
Athree-wireserial interface unit(SIU)providesaccess tocontrol and
configurationregisters.Thisinterfacegivesamicroprocessorfull controlof
thePSC2106 and enables system designerstomaximize bothstandbyand
talk times.
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 providesfast,efficientcharging ofa
single-cell Li-ionbattery.Used inconjunctionwitha current-limited voltage
sourceandanexternal PMOSpass transistor,thisblock safelyconditions
near-deadcellsandprovidestheoptionofhavingfast-chargeandtop-off
controlled internallyorbythesystem's microprocessor.
3.Backlight LED Driver
The backlight LEDdriver isa low-side,programmablecurrentsource
designed tocontrolthe brightness ofthekeyboardandLCDillumination.
The driver isenabled byEN_LED, anditscurrentsettingisdetermined by
LED[0:2].Provided EN_LEDis '1',the drivercanbe programmed tosink
from 12.5mA to100mA in12.5mA steps.LED_DRViscapableofsinking
100mA ataworst-case maximum outputvoltageof0.6V.Forefficientuse,
theLEDsisconnected betweenthe batteryandtheLED_DRVoutput.

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4.VibratorMotorDirver
Thevibratormotordriver isa low-side,programmablevoltagesource
designed todriveasmall dcmotor thatsilentlyalertsthe userofan
incomingcall. The driver isenabled byEN_VIB, anditsvoltagesettingis
determined byVIB[0:2].Provided EN_VIBisa logic1,the drivercanbe
programmed tomaintainamotorvoltageof1.1Vto2.5Vin20mV stepsand
whilesinkingupto100mA.Forefficientuse,thevibratormotorshould be
connected betweenthe mainbatteryandtheVIB_DRVoutput.
2)Connector
1.LCDConnector
LCDisconsisted ofmainLCD(color65K STNLCD)andsmall LCD(4-gray
LCD).ChipselectsignalsofEMIpart inthetrident,CLCD_EN_FOand
GLCD_EN_FO,
canenableEachLCD.LED_EN_FOsignal enableswhiteLEDofmainLCD
andEL_EN_FOsignal enablesELofsmall LCD.
Thesetwosignalsarefrom IO part oftheDSPinthetrident. RST signal
from 2006 initiatestheinitial process oftheLCD.
16-bit data lines(D(0)_FO~D(15)_FO)transfersdata andcommandstoLCD
throughemi_filter.Data andcommandsuse A(2)_FOsignal. Ifthis signal is
high,InputstoLCDarecommands.Ifit islow,InputstoLCDare data. The
signal whichinformstheinputoroutputstatetoLCD,isrequired.But this
system is notnecessarythis signal. SoCP_WEN_FOsignal isused towrite
dataorcommandstoLCD.
Powersignalsfor LCDareV_batandV_ccd.
SPK1PandSPK1N fromCSP1093 are used foraudiospeaker.And
VIB_EN_FOfrom 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.IRDA
This system usesIRDA module,HSDL_3201,HP's.Thishas signals,
IRDA_EN(enablesignal),IRDA_RX(inputdata)and IRDA_TX(outputdata).
Thesesignalsareconnected toPPIoftrident.Itusestwopowersignals.
V_ccdisused forcircuit andV_bat isused for LED.
4.Keypadconnector
Thisisconsisted ofkeyinterfacepins amongPPIinthetrident,
KEY_ROW[0~4]and KEY_COL[0~4].Thesesignalscomposethe matrix.
Resultofmatrixinformsthekeystatustokeyinterfaceinthetrident.Some
pins areconnected tovaristorforESD protection.Andpoweron/off keyis
seperated fromthe matrix.
Sopoweron/off signal isconnected with PSC2106 toenablePSC2106.
SVC_GREEN,SVC_REDandSVC_BLUE arefrom OCTLofCSP1093.
Thesesignalsdecide thecolorofLED,serviceindicator.
EighteenkeyLEDusetheV_batsupplyvoltage.Theseareconnected to
BACKLIGHT signal inthePSC2106.
This signal enablesLEDswithcurrentcontrol. FLIP_SNS informsthestatus
of folder(openorclosed)tothetrident.Thisusesthehall effectIC,
A3210ELH.
A magnetundermainLCDenablesA3210ELHwhichisonthekeyFPCB.
5. EMIFiltering
This system usestheshuntcapacitorstoreducenoisefromLCD part.Some
controlsignalsareconnected toLCDwithoutEMIfiltering.
3)IFconnetor
It is24-pinconnector, and uses18-pinatpresent.Theyare designed touse
SDS,DEBUG,DLC-DETECT,JIG_ON,VEXT,VTEST,VF,CF,VBATandGND.
Theyconnected topowersupplyIC,microprocessorandsignal processorIC.

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4)Audio
AOUTAPfromCSP1093 isconnected tothe main speaker.AOUTANis
connected tothespeakervia audio-amp.AOUTBNand AOUTBPareconnected
tothe ear-micspeakerviaear-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.
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.
YMU759 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.

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5)Memory
This system usesSHARP's memory,LRS1826A.
It isconsisted of128Mbitsflashmemoryand32MbitspsuedoSRAM.Ithas
16 bit data line,D[0~15]whichisconnected totrident,LCDorCSP1093.It
has22 bit address lines,A[1~22].Theyareconnected too.CP_CSROMENand
CO_CSROM2ENsignals, chipselectsignalsinthetridentenabletwomemories.
Theyuse 3 voltsupplyvoltage,V_ccdand 1.8voltsupplyvoltage,Vcc_1.8ain
thePSC2006.Duringwrtingprocess,CP_WENislowandit enableswriting
process toflashmemoryandpseudoSRAM.Duringreadingprocess,CP_OEN
islowandit output informationwhichislocated at theaddress fromthe
trident intheflashmemoryorSRAMtodata lines. Eachchipselectsignalsin
thetridentselectmemoryamong2flashmemoryand 2 SRAM. Reading or
writingprocedureisprocessed afterCP_WENorCP_OENisenabled.Memories
useFLASH_RESET,whichisbuffered signal ofRESETfromPSC2106,forESD
protection.A[0] signal enableslowerbyteofpseudoSRAMandUPPER_BYTE
signal enableshigherbyteofpseudoSRAM.
6)Trident
Trident isconsisted ofARMcoreandDSPcore.Ithas20K*16bitsRAM
144K*16bitsROMintheDSP.Ithas4K*32bitsROMand 2K*32bitsRAMinthe
ARMcore.DSPisconsisted oftimer,one bit input/outputunit(BIO),JTAG, EMI
and HDS(HardwareDevelopmentSystem).ARMcoreisconsisted ofEMI,
PIC(Programmable InterruptController),reset/power/clock unit,DMAcontroller,
TIC(TestInterfaceController),peripheral bridge,PPI,SSI(SynchronousSerial
Interface),ACC(Asynchronouscommunications controllers),timer,ADC,
RTC(Real-Time Clock)andkeyboardinterface.
DSP_AB[0~8], address linesofDSPcoreandDSP_DB[0~15],data linesof
DSPcoreareconnected toCSP1093.A[0~20], address linesofARMcoreand
D[0~15],data linesofARMcoreareconnected tomemory,LCDand YMU759.
ICP(InterprocessorCommunicationPort)controlsthecommunicationbetween
ARMcoreandDSPcore.
CSROMEN,CSRAMENandCS1NtoCS4Ninthe ARMcoreareconnected to
eachmemory.WENand OENcontroltheprocess ofmemory. External
IRQ(InterruptReQuest)signalsfrom eachunits,suchas,YMU, Ear-jack,
Ear-mic andCSP1093,need thecompatibleprocess.
Some PPIpins hasmanyspecial functions.CP_KB[0~9]receivethestatus
fromkeyFPCB andare used for thecommunicatiosusing
IRDA(IRDA_RX/TX/EN)and data link
cable(DEBUG_DTR/RTS/TXD/RXD/CTS/DSR).AndUP_CS/SCLK/SDI, control
signalsforPSC2006 areoutputted through PPIpins.Ithas signal port for

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charging(CHG_DET,CHG_STAT0),SIM_RESETandFLIP_SNS withwhichwe
knowsopen.closed statusof folder.IthasJTAGcontrolpins(TDI/TDO/TCK)for
ARMcoreandDSPcore.It recieves13MHzclock inCKI pinfrom external
TCXOandreceives32.768KHzclock fromX1RTC.ADC(Analog toDigital
Convertor)part receivesthestatusoftemperature,batterytypeand battery
voltage.Andcontrolsignals(DSP_INT,DSP_IO andDSP_RWN)forDSPcoreare
used.ItenablesmainLCDandsmall LCDwith DSPIP pins.
7)CSP1093
CSP1093 integratesthetimingandcontrolfunctions forGSM 2+mobile
applicationwiththe ADCandDACfunctions.TheCSP1093 interfacestothe
trident, viaa16-bit parallelinterface.Itservesastheinterfacethatconnects
aDSPtotheRFcircuitryinaGSM 2+mobiletelephone.DSPcanload 148
bitsofburstdataintoCSP1093’s internal register, andprogramCSP1093’s
event timingandcontrolregister withthe exact time tosendthe burst.When
thetimingportionofthe event timingandcontrolregistermatchestheinternal
quarter-bit counterandinternal frame counter,the 148 bitsintheinternal
registerareGMSK modulated accordingtoGSM 2+standards.Theresulting
phaseinformationistranslated intoIandQdifferential outputvoltagesthatcan
be connected directlytoanRFmodulatorat theTXOPandTXONpins.The
DSPis notified whenthetransmissioniscompleted.For receivingbaseband
data, a DSPcanprogramCSP1093’s event timingandcontrolregister withthe
exact time tostart receivingIandQsamplesthroughTXIPandTXINpins.
Whenthat time isreached,thecontrolportionofthe event timingandcontrol
register will start the basebandreceivesectionconvertingIandQsample
pairs.Thesamplesarestored inadouble-buffered registeruntiltheregister
contains 32 samplepairs.CSP1093 then notifiestheDSPwhich hasampletime
toreadtheinformationoutbeforethenext32 samplepairsarestored.The
voice band ADCconverter issuesaninterrupt totheDSPwhenever it finishes
convertinga16-bit PCMword.TheDSPthenreadsthenew inputsampleand
simultaneouslyloadsthevoice bandoutputDACconverter withanewPCM
output word.Thevoice bandoutputcanbe connected directlytoaspeakervia
AOUTANand AOUTAP pins andbeconnected toa Ear-micspeakervia
AOUTBNand AOUTBP pins.
8)X-TAL(13MHz)
This system usesthe 13MHz TCXO,TCO-9141B,Toyocom.AFCcontrolsignal
formCSP1093 controlsfrequencyfrom 13MHzx-tal. Itgeneratestheclock
frequency.Thisclock isfed toCSP1093,Trident,YMU759 andSilabsolution.

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3. SGH-P408 FlowChart of Troubleshooting
3-1
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1. Power On
Currentconsumption
>=100mA
'PowerOn'doesnotwork
Voltage>= 3.3V
Downloadagain
ChargetheBattery
pin#11 >= 2.8VCheckU100 andC117
pin#39 andpin#42 =
2.8V
CheckU100 andC116
Freq=13MHz,
Vrms ≥ 300mV
and
Vpp ㆃ900mVpp
Checktheclockgeneration
circuit
(related toOSC801)
END
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
pin#9=1.8VNo
Yes
ChecktheVbat.Voltage
CheckthepinofU100
Checktheclocksignalatpin#3of
OSC801
Checktheinitialoperation
Checkthecurrent
consumption

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SGH-P408 FlowChartofTroubleshooting
3-2
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39
37
VLDO_4
33
VLDO_5
VLDO_6 42
VLDO_7 40
30
VREF
12
VRTC
48
VSIM
4
VIB_DRV
VL4S_A36
35
VL4S_B
VL5S_A32
31
VL5S_B
9
VLDO_1
11
VLDO_2
VLDO_3
UP_IO
54 UP_RST
3VACC
2VBAT
VDD1210
38
VDD34
34
VDD5
41
VDD67
VEXT
1
17 SCLK
15 SDI
16 SDO
50
SIM_CLK
SIM_IO
51
SIM_RST
49
UP_CLK
53
52
LED2_DRV
20 PSW1_BUF
PWR_KEEP
21
46 PWR_SW1N
PWR_SW2
47
19
RESETN
RING_DR
V
5
55 RING_PWM
RTC_ALMN
13
GND
GND
58
59 GND
GNDG
60
6
GNDD1
GNDQ
28
INTRQ
14
LED1_DRV
78
CSN
18
EN_3
22
23 EN_4[0]
EN_4[1]
24
25 EN_5
EN_5A
26
27 EN_5B
57
U100
44 ADC_AUX1
ADC_AUX2
45
ADC_TRIG
56
43 BTEMP
CREF
29
R105
10
C105
1UF
VCCA
1
3
2
VCCD
5
6
4
Q102
Q101
3
1
2
VRF VPAC
1UF
C111 470NF C112
3
2
VOSC
VBAT
4
Q100
1
U102
2
5
6
3
1
47K,1%
R107
10K,1%
R108
NC
R112
R109
3K
78
GG
910
G
330K
R102
CN100
11 22
33 4 4
5
5
66
G
VRTCVCCD
100PF
C113
10K,1%
R111
VCCB
100NF
C106
VCC_1.8A
C114
2.2UF
U101
DRIVE
6
GND
2
1
ISENSE
PROG
43
VCC
5
VSENSE
VBAT
R101
NC
VRTC
33PF
C101
33PF
C103
33PF
C104
2.2UF
C102
10NF
C115
R110
NC
C100
100NF
1UF
C110
C118
10UF
6.3V
2
NEG
1
POS
VBAT
M1
C109
1UF1UF
C108
C117
1UF
C119
10UF
10V
1UF
C116
1.2K,1%
VBAT
TA_VEXT
CHG_DET
BACKLIGHT_2
R103
UP_SCLK
UP_CS
RST
KEY_ROW(0)
KEY_COL(2)
EN_VRF
EN_VPAC
JIG_ON
SIMCLK
SIMRST
CHG_ON
ICHRG
TA_VEXT
XOENA
BACKLIGHT_1
PWR_KEEP
PWR_ON
RTCALARM
UP_SDI
SIMDATA
VREF
TA_VEXT

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SGH-P408 FlowChartofTroubleshooting
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3-3
2. Initial
Thepin#9ofU100 =
1.8Vand
thepin#11 ofU100 ㆃ
2.825V?
InitializationFailure
ChecktheU100
(Ifithas someproblem,ithastobe
replaced.)
END
No
Yes
Isthepin#19 of
U100
"Low-> High"?
Yes
ChecktheU601
Thereis32.768kHz
waveformsat theC614
andC616
ChecktheLCD Part
Yes
No
No
Yes
Yes
Yes
TheVoltageis"High"
at theC110,C111,
C112
Checkthe AudioPart
No
ChecktheU100
(Ifithas someproblem,ithastobe
replaced.)
ChecktheU700
Thepin#25 ofU100 is
"High"
ChecktheU100
LCDdisplayisO.KNo
No
Yes
Yes
SoundisO.KNo

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SGH-P408 FlowChartofTroubleshooting
3-4
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IRDA
LCD CONNECTOR
JTAG CON
C211
C225
33PF
C217
33PF
33PF
VCC
D
C232
1UF
100NF
C200
TP200
0
R205
TP202
C214
33PF
VBAT
33PF
C230
C212
33PF
C234
100PF100PF
C233
VBA
T
VCCD
C210
33PF
C237
100PF 100PF
C241C240
100PF100PF
C239
1NF
C221 C226
33PF
C220
33PF 33PF
C228
10R200
100PF
C236
TP205
10NF
C205
TP204
C229
33PF
33PF
C209C206
33PF
TP203
TP201
330NF
C201
33PF
C224
TXD
7
VCC
3
VLED
8
C231
1UF
4AGND
GND1
1
10
GND2
GND3 11
2NC
6RXD
SD
5
SHIELD 9
LED200
TP210
33PF
C213
6
6
77
8
8
99
33
30 30
31
31
32 32
33
33
34 34
4
4
5522 22
23
23
24 24
25
25
26 26
27
27
28 28
29
29
15 15
16
16
17 17
18 18
19
19
2
2
20 20
21
21
CN200
11
10
10
11 11
12 12
13
13
14 14
1NF
C202
TP208
TP209
TP206
TP207
100PF
C238
C207
33PF
C218
33PF
33PF
C216
33PF
C208
C227
33PF
33PF
C219 C223
33PF
100PF
C235
33PF 33PF
C204C203
VCCB
C222
33PF
DSP_TDO
DSP_TDI
DSP_TMS
DSP_TCK
CP_WEN
EL_EN
C215
33PF
CAM_D(1)
SPK1N
YMU_VIB_EN
CAM_D(9)
CAM_D(11)
CAM_D(13)
CAM_D(15)
SVC_GREEN
SVC_BLUE
CP_TDO
RST
CP_TDI
CP_TMS
CP_TCK
LED_EN
CAM_OEN
CAM_D(0)
CAM_D(2)
CAM_D(4)
CAM_D(10)
CAM_D(6)
CAM_A
CAM_CLCD_EN
CAM_WEN
CAM_D(7)
CAM_D(5)
CAM_D(3)
IRDA_RX
IRDA_EN
IRDA_TX
SPK1P
RST
SVC_RED
CAM_D(14)
CAM_D(12)
CAM_D(8)

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SGH-P408 FlowChartofTroubleshooting
ThisDocumentcan notbe used withoutSamsung'sauthorization
3-5
3. SimPart
IsthereanySignals
pin#52,#53,#54 of
U100?
"Insert SIM"isdisplayed ontheLCD
ChecktheU601
ChecktheSIMCard
END
No
Yes
Yes
Yes
NoChecktheU100
IsthereanySignals
pin#49,#50,#51 of
CN100?

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SGH-P408 FlowChartofTroubleshooting
3-6
ThisDocumentcan notbe used withoutSamsung'sauthorization
VEXT
GND
GND
DEBUG_TXD
SDS_RXD
BP_VF
DEBUG_DSR
VTEST
DEBUG_RXD
DEBUG_DTR
CF
DLC_DETECT
GND
JIG_ON
DEBUG_RTS
DEBUG_CTS
VEXT
I/F CONNECTOR
SDS_TXD
DEBUG_DCD
DEBUG_RI
VBAT
ZD305ZD307
ZD304
47K
VCCD
ZD303
R304
R301
1K
14
R3021 K
ZD308
VBAT
C301
220NFC300
100NF
12
13
11
45
R3031 K
17
ZD300
123
15
16
2
ZD306
CN300-1
1
R3061 K
1KR305
18
20
21
22
19
VCCD
ZD302
47K
R300
123
45
10
6
ZD301
8
9
7
4
5
TA_VEXT
DLC_DETECT
3
SDS_RXD
JIG_ON
SDS_TXD
DEBUG_RXD
DEBUG_TXD
DEBUG_RI
BP_VF
DEBUG_CTS
DEBUG_RTS
DEBUG_DCD
DEBUG_DTR
DEBUG_DSR

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SGH-P408 FlowChartofTroubleshooting
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3-7
4. ChargingPart
Thepin#17,#18 of
CN300 isTA_VEXT
ㆃ5V?
Abnormalcharging operation
Thepin#3ofU102 is
"low"?
ReplaceTAorCheckCN300
ChecktheU102
ChecktheQ101
END
No
Yes
Yes
Yes
No
No
Thepin#3ofQ101 is
"low"?
Thepin#5ofU101 is
3.2~4.2V"?ChecktheU101
No
Yes
TheICHRG=1V(during
charging)
andㆃ180mV(full
charging)?
NoSolderagainorchangeR108
Yes

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SGH-P408 FlowChartofTroubleshooting
3-8
ThisDocumentcan notbe used withoutSamsung'sauthorization
EAR_MIC_P
EAR_SPK_N
EAR_MIC_N
EAR_SPK_P
JACK_IN
AUDIO
MAIN_MIC
NC
C405
100NF
C408
R404
82K
120K
R403
C4019
1NF
150PFC419
R421
56K
4.7NF
C421
C412
6.3V
4.7UF
100NF
C402
ZD403
R405
C416
33UF
33K
R402
12
100K
R401
12
ZD405
R400
VBAT
C410
NC
3.3K
R408
10K
R407
R409
R411
680
NC
C415
56K
ZD402 ZD401
C407
C401
120PF
220PF
C413
1NF
C420
8PF
C414
100NF
6.3V
C404
4.7UF
R420
1K
R419
18K
R418
10K
2.2K
R410
VREF VSS
8
/CS
29
3
/IRQ
/RD
31
/RST
4
28
/WR
MTR
5
NC PLLC
6
17
SPOUT
1
SPOUT
2
18
15
SPVDD
SPVSS
16
7
VDD
9
EQ1
12
13
EQ2
EQ3
14
HPOUT-L/MONO
10
11
HPOUT-R
IOVDD
32
LED
2
19
CLKI
D0
27
26
D1
25
D2 D3
24 23
D4 D5
22
D6
21
D7
20
1
V+
U401
30 A0
1
COM2
6GND
IN14
IN2
8
5
NC1
7NC2
NO1 2
NO2
10
VCCD
U400
3
COM1
9
CN401
1
2
3
4
5
6
VCCD
C403
22NF
NC
C418
NCR417
NC
R416
0
56K
R415 10K R414
R412
2.2K
R413
33PF
C411
1UF
C417
C4020
1UF
C409
150PF
C4018
1NF
VCCDVCCA
Q400
23
1
C400
VCCA
SPK1P
SPK1N
YMU_SPK1N
YMU_SPK1P
YMU_LED
CP_WEN
100NF
JACK_IN
AOUTBP
YMU_VIB_EN
AOUTAP
AOUTAN
AUDIO_AMP_EN
AOUTBN
D(4) D(3)
D(1)
D(0)
CP_OEN
A(0)
YMU_EN
AUXOUT
AUXIN
MICOUT
MICIN
EAR_SWITCH
D(2) YMU_SPK1P
CLK13M_YMU
YMU_SPK1N
YMU_IRQ
RST
D(5) D(6) D(7)