Samsung SGH-N620E User manual

SGH-N620E
SERVICE
Manual
GSMTELEPHONECONTENTS
1.Specification
2.CircuitDescription
3.ExplodedViewsand PartsList
4.ElectricalPartsList
5.BlockDiagrams
6.PCB Diagrams
7.FlowChartofTroubleshooting
GSMTELEPHONE

ELECTRONICS
Samsung ElectronicsCo.,Ltd.February.2003
Printedin Korea.
CodeNo.:GH68-04684A
BASIC.
ⓒ

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1. SGH-N620E Specification
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1-1
GSM900
Phase1EGSM900 Phase2DCS1800 Phase1
Freq.Band[MHz]
Uplink/Downlink 890~915 935~960 880~890 925~935 1710~1785 1805~1880
ARFCNrange1~124 1~124 &
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~5dBm33~5 30dBm~0dBm
PowerClass 5pcl~19pcl5~19 0pcl~15pcl
Sensitivity-102dBm-102dBm-100dBm
TDMAMux 8 8 8
Cell Radius35Km35Km2Km
1. GSMGeneralSpecification

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SGH-N620ESpecification
1-2
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-N620E Circuit Description
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2-1
1.SGH-N620ERFCircuit Description
1)RXPART
1.ASM(U301)→Switching Tx,Rx pathforGSM900,DCS1800 by logic controlling.
2.ASMControlLogic(Q301,Q302,Q303)→TruthTable
VC1VC2
GSMTxModeLH
DCSTxModeHL
GSMRxModeL L
DCSRxModeL L
3.FILTER
ToconvertElectromagneticFieldWavetoAcousticWave and then pass thespecificfrequency band.
-DCS FILTER(F301,C305,C307,L303)→For filtering thefrequency band between 1805 ~1880 MHz
-GSMFILTER(F302,C210,C312,L306)→For filtering thefrequency band between 925 ~960MHz
4.VC-TCXO (OSC301)
To generatethe13MHzreference clockto drivethelogic and RF.Afteradditionalprocess,thereference clockappliesto
theU304 RxIQdemodulatorand U302 TxIQmodulator.Theoscillator forRXIQdemodulatorand Txmodulatorare
controlled by serialdatatoselectchanneland usefast lockmodeforGPRShigh class operation.
5.Si4200F(U302)
Thischipintegratestwo differential-inputLNAs.
TheGSMinputsupportstheE-GSM,DCSinputsupportstheDCS1800.TheLNA inputsarematchedtothe200 ohm
differentialoutputSAWfiltersthrough externalLCmatching network.
Image-rejectmixerdownconvertstheRFsignal toa100 KHzintermediatefrequency(IF)withtheRFLOfromSI4133T
frequencysynthesizer.TheRFLOfrequencyisbetween 1737.8~1989.9MHz.
TheMixeroutput isamplifiedwithananalog programmablegainamplifier(PGA),whichiscontrolled by AGAIN.
ThequadratureIFsignal isdigitizedwith high resolution A/Dconverts(ADC).
6.Si4201BM(U304)
TheSI4201BMdown-convertstheADCoutput to baseband withadigital100 KHzquadratureLOsignal.Digital
decimation and IIRfiltersperformchannelselection toremoveblocking and reference interface signals.
Afterchannelselection,thedigitaloutput is scaledwithadigitalPGA,whichiscontrolledwiththeDGAIN.DACsdrive
adifferentialanalog signalontotheRXIP,RXIN,RXQP,RXQN pinstointerface tostandardanalog-inputbaseband IC.
2)TXPART
Baseband IQsignalfedinto offsetPLL,thisfunction isincludedinsideofU305 chip.SI4200Fchip generatesmodulator
signalwhich powerlevel isabout6.5dBmand fedintoPowerAmplifier(U303).ThePAoutputpowerand power ramping
arewell controlled by AutoPowerControlcircuit.WeuseoffsetPLL below

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SGH-N620ECircuitDescription
2-2
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. Baseband CircuitdescriptionofSGH-N620E
1.PowerManagement
Fourlow-dropoutregulatorsdesignedspecificallyforGSMapplicationspowerand helpensureoptimalsystemperformance
and long batterylife.whileaself-resetting,electronicallyfusedswitchsuppliespowertoexternalaccessories.Ancillary
supportfunctions,suchasRTCmodule and High VoltageChargepump,Clock generator,aidinreducing both boardarea
and systemcomplexity.
2.ClockGenerator
TheClockGenerator (CG)generatesall clocksforinternaland externalusage.The32768 Hz crystaloscillatorprovidesan
accuratelowclockfrequencyfortheVP40578.
3.LCD
LCDis4 greyLCD.ChipselectsignalsintheU205,LCD_ENcanenableLCD.B_LIGHTsignalenablesblueLEDof
LCD.BlueLEDsusethe'LVCC'supply voltage.
"RST"signal initiatestheResetprocess oftheLCD.
8-bit datalines(D(0)~D(7)transfersdata and commandstoLCDthrough bypass capacitor.Data and commandsuse
"A(0)"signal.If this signal ishigh,InputstoLCDare commands.If it islow,InputstoLCDaredata.Thesignalwhich
informstheinputoroutputstatetoLCD,isrequired.But this systemisnotnecessarythis signal.So"WR"signal is
usedtowritedataorcommandstoLCD.PowersignalforLCDis"VDD3.0".
4.Key
Thisisconsisted ofkeyinterface pinsamong VP40578 (KEYBORD_ROW(0:7),KEYBOARD_COL(0:7)) .Thesesignals
composethematrix.Result ofmatrixinformsthekeystatusto keyinterface intheVP40578.EightkeyLEDsusethe
"LED_3V3"supply voltage."BACKLIGHT"signalenablesLEDswithcurrentcontrol
5.IFconnector
It is18-pinconnector.Theyaredesignedto useRS232_TXD,RS232_RXD,RS232_RTS,RS232_CTS,BOOT,SCL,SDA,
MIC2N,MIC2P,SPK2N,SPK2P,DCVOLT.Theyconnectedto powersupplyIC,microprocessorand signalprocessor IC.
6.BatteryChargeManagement
Acomplete constant-current/constant-voltagelinearcharger forsingle cell lithium-ion batteries.If ta connectedto phone,
"DCVOLT"enable charger ICand supplycurrent to battery.whenfault condition caused,"CHG_ON"signal levelchange
lowto high and charger ICstop charging process.
7.Audio
SPK2Pand SPK2NfromVP40578 are connectedtothemainreceiver.MIC2Pand MIC2Nare connectedtothemain

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SGH-N620ECircuitDescription
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2-3
MIC.
YMU759,isaLSI forportabletelephonethat iscapableofplaying high qualitymusicby utilizing FMsynthesizer
and ADPCMdecorderthatareincludedinthisdevice.Asasynthesis,YMU759 isequipped 16 voiceswith different tones.
Since thedevice iscapableofsimultaneously generating up tosynchronouswiththeplay oftheFMsynthesizer,various
sampled voicescan beusedas sound effects.Since theplay dataofYMU759 areinterpretedatanytimethrough FIFO,
thelength ofthedata(playing period)isnot limited,sothedevice canflexiblysupportapplication suchasincoming call
melody musicdistribution service.Thehardwaresequencerbuilt inthisdevice allowsplaying ofthe complexmusic
withoutgiving excessiveloadtotheCPUoftheportabletelephones.Moreover,theregistersoftheFMsynthesizercan be
operated directlyfor real timesound generation,allowing,forexample,utilization ofvarious sound effectswhen using the
gamesoftwareinstalledintheportabletelephone.YMU759 includesaspeakeramplifierwith high rippleremovalrate
whosemaximumoutput is550mW(SPVDD=3.6V).Thedevice isalsoequippedwithconventionalfunction including a
vibartorand a circuit forcontrolling LEDs synchornouswithmusic.Fortheheadphone,it isprovidedwithastereophonic
output terminal.Forthepurposeofenabling YMU759 to demonstrateitsfull capablities,Yamahapurposeto use
"SMAF:SyntheticmusicMobileApplication Format"asadatadistribution format that iscompatiblewithmultimedia.Since
theSMAFtakesastructurethatsetsimportance on thesynchronization betweensound and images,variouscontentscan
bewrittenintoit including incoming call melody withwordsthatcan beusedfortraning karaoke,and commercial
channel thatcombinestexts,imagesand sounds,and others.ThehardwaresequencerofYMU759AE2 directlyinterprets
and playsblocksrelevant tosysthesis(playing music and reproducing ADPCMwithFMsynthesizer) thatareincludedin
datadistributedinSMAF.
8.Memory
SignalsintheVP40578 enabletwomemories.They useonly onevolt supply voltage,VDD3.This systemusesLRS1383.
It isconsisted of32Mbitsflashand 8MbitsSRAM.. Ithas16 bit dataline,D[0~15]whichisconnectedtoVP40578.It
has22 it address lines,HA[0~21].FALSH1and CSRAMsignalsischipselect.
9.VP40578
VP40578 isconsisted ofARMcore and DSP core.Ithas8x1Kword on-chip program/dataRAM,55 Kwordson-chip
programROMintheDSP.Ithas4K*32bitsROMand 2K*32bitsRAMintheARMcore.DSP isconsisted ofKBS,
JTAG,EMIand UART.ARMcoreisconsisted ofEMI,PIC(ProgrammableInterruptController),reset/power/clock unit,
DMAcontroller,TIC(TestInterface Controller),eripheralbridge,PPI,SSI(SynchronousSerialInterface),ACC(Asynchronous
communicationscontrollers),timer,ADC,RTC(Real-TimeClock)and keyboardinterface.
KBIO(0:7),address linesofDSP core and HD[0~15].HA[0~23],address linesofARMcore and HD[0~15],datalinesof
ARMcore are connectedtomemory,YMU759.
ExternalIRQ(InterruptReQuest)signalsfromeach units,suchas,PMUneedthe compatibleprocess.
KBIO[0~7] receivethestatusfromkey
Ithas JTAG controlpins(TDI/TDO/TCK) forARMcore and DSP core.Itrecieves13MHz clockinCKIpinfrom
externalTCXO.ADC(Analog toDigitalConvertor) partreceivesthestatusoftemperature,batterytype and battery voltage.
10.VC-TCXO(13MHz)
This systemusesthe13MHz,VC-TCXO.Toyocom.AFCcontrolsignalformVP40578 controlsfrequencyfrom13MHz
x-tal.Itgeneratesthe clockfrequency.ThisclockisconnectedtoVP40578,YMU762.

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3. SGH-N620E ExplodedViewand its Partslist
3-1
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1.CellularphoneExplodedView

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SGH-N620E Explodedviewand its Partlist
3-2
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2.CellularphonePartslist
SEC CODE
WHITE
1FRONT COVER ASS'Y GH75-03840A 1
1-1 FRONT COVER GH72-10706A 1
1-2 LCD-SPONGE GH74-06910A 1
1-3 DUMMY-SPEAKER GH72-03218A 1
1-4 WINDOW-LCD GH72-10710A 1
1-5 LENS LED GH72-03217A 1
1-6 DUMMY-FRONT GH72-03212A 1
1-7 DECORATION GH72-03219A 1
1-8 METAL-MANGSA FRONT GH74-06920A 1
1-9 COVER-LED GH73-01049A 1
2KEY PAD GH75-03842A 1
3FRAME-LCD GH71-02536A 1
4PBA -1
4-1 COVER-LCD GH73-00923A 1
4-2 LCD-ASS'Y -1
4-3 PCB -1
4-4 INSULATION TAPE GH74-05984A 1
5KEY-VOLUME GH75-01490A 1
6IF-COVER GH73-00893A 1
7INSULATION TAPE GH74-07032A 1
8SHIELD-REAR GH72-10708A 1
9REAR COVER ASS'Y GH75-03841A 1
9-1 REAR COVER GH72-10707A 1
9-2 SPRING LOCKER GH70-10516A 1
9-3 LOCKER MAIN GH72-03116A 1
9-4 COVER EAR-PHONE GH73-00894A 1
9-5 METAL-MANGSA REAR GH74-06921A 1
9-6 WATERPROOF TAPE GH68-02026A 3
10 SPEAKER 3001-001254 1
11 MOTOR GH31-00033A 1
12 BUSHING ANT GH71-00588A 1
13 ANTENNA GH42-00137A->E 1
14 BATTERY-ASS'Y GH43-00435A 1
15 MOBILE CAP GH73-00892A 1
16 SCREW CAP GH73-00891A 1
17 SCREW M1.7X5 6001-001346 5
18 MIC-RUBBER GH73-02596A 1
19 FRONT TOTAL ASS'Y GH97-03134A 1
SVC REMARKNO DESCRIPTION Q'TY

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SGH-N620E Explodedviewand its Partlist
3-3
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3.TestJig(GH80-10508A)
3-1.RFTestCable
(GH39-00174A)3-2.TestCable (GH39-00079A)3-3.SerialCable
3-4.PowerSupplyCable3-5.DATACABLE
(GH39-00078A)3-6.TA (GH44-00184G)

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4. SGH-N620E MAIN ElectricalParts List
4-1
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SEC Code Design LOC
0401-001110 D101
0403-001387 ZD104
0403-001427 ZD105
0404-001172 D301
0406-001104 ZD101
0406-001104 ZD102
0406-001104 ZD103
0407-001007 D104
0501-000162 Q201
0501-000225 Q304
0501-002011 Q105
0502-001201 Q100
0504-001174 Q301
0504-001174 Q302
0504-001174 Q303
0505-001423 U105
0506-001004 U104
0601-001543 LED110
0601-001611 LED101
0601-001611 LED104
0601-001647 LED102
0601-001647 LED105
0601-001647 LED106
0601-001647 LED107
0601-001647 LED108
0601-001647 LED109
0801-002540 U203
0801-002540 U204
1001-001145 U207
1103-001440 U109
1103-001288 U208
1109-001204 U201
1201-001954 U103
1202-001036 U210
1203-002077 U101
1203-002187 U209
1203-002598 U104
SEC Code Design LOC
1203-002766 U102
1203-003004 U106
1204-001811 U107
1205-002035 U205
1205-002185 U304
1205-002268 U302
1209-001434 U305
1404-001221 V103
1405-001082 V106
1405-001082 V107
1405-001082 V108
1405-001082 V200
1405-001082 V201
1405-001082 V202
1405-001082 V203
1405-001082 V204
1405-001082 V205
1405-001082 V206
1405-001082 V207
1405-001082 V208
1405-001082 V209
1405-001093 V209
2007-000138 R111
2007-000139 R106
2007-000140 R136
2007-000140 R324
2007-000140 U637
2007-000141 R237
2007-000141 R238
2007-000141 R316
2007-000143 R144
2007-000143 R147
2007-000148 R135
2007-000148 R201
2007-000148 R203
2007-000148 R222
2007-000148 R223

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SGH-N620E ElectricalPartsList
4-2
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SEC Code Design LOC
2007-000148 R225
2007-000148 R305
2007-000148 R314
2007-000151 R217
2007-000152 R229
2007-000152 R323
2007-000155 R321
2007-000157 R101
2007-000157 R125
2007-000157 R232
2007-000162 R102
2007-000162 R119
2007-000162 R120
2007-000162 R121
2007-000162 R122
2007-000162 R123
2007-000162 R124
2007-000162 R137
2007-000162 R138
2007-000162 R139
2007-000162 R202
2007-000162 R204
2007-000162 R205
2007-000162 R211
2007-000162 R213
2007-000162 R214
2007-000162 R218
2007-000162 R220
2007-000162 R221
2007-000162 R224
2007-000162 R226
2007-000162 R227
2007-000162 R228
2007-000162 R233
2007-000162 R241
2007-000162 R242
2007-000168 R234
SEC Code Design LOC
2007-000170 R116
2007-000170 R249
2007-000171 R206
2007-000171 R309
2007-000172 R108
2007-000172 R109
2007-000172 R112
2007-000172 R113
2007-000172 R302
2007-000172 R242
2007-000174 R127
2007-000174 R130
2007-000174 R131
2007-000174 R132
2007-000174 R133
2007-000174 R134
2007-000566 R118
2007-001119 R320
2007-001244 R315
2007-001288 R306
2007-001298 R317
2007-001298 R325
2007-001298 R326
2007-001301 R105
2007-001301 R126
2007-001301 R129
2007-001319 R142
2007-001325 R141
2007-001325 R143
2007-002796 R230
2007-002796 R231
2007-002796 R235
2007-002796 R236
2007-007008 R307
2007-007008 R308
2007-007095 R145
2007-007095 R303

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SGH-N620E ElectricalPartsList
4-3
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SEC Code Design LOC
2007-007095 R304
2007-007107 R104
2007-007107 R318
2007-007107 R319
2007-007309 R312
2007-007309 R313
2007-007311 R310
2007-007311 R313
2007-007318 R212
2007-007318 R215
2007-007318 R216
2007-007318 R219
2007-007334 R251
2007-007529 R252
2007-007538 R117
2007-007573 R247
2007-007590 R146
2007-007698 R207
2007-007698 R208
2007-007698 R209
2007-007698 R210
2007-007981 R248
2007-008117 R103
2011-001344 R140
2011-001345 R246
2203-000233 C308
2203-000233 C309
2203-000233 C320
2203-000233 C325
2203-000233 C329
2203-000233 C338
2203-000254 C106
2203-000254 C107
2203-000254 C134
2203-000254 C136
2203-000254 C212
2203-000254 C241
SEC Code Design LOC
2203-000254 C242
2203-000254 C243
2203-000254 C247
2203-000254 C251
2203-000254 C334
2203-000254 C335
2203-000359 C206
2203-000359 C207
2203-000359 C208
2203-000359 C209
2203-000386 C157
2203-000438 C152
2203-000438 C328
2203-000585 C161
2203-000609 C126
2203-000628 C313
2203-000628 C314
2203-000679 C105
2203-000679 C108
2203-000679 C110
2203-000679 C111
2203-000679 C141
2203-000679 C142
2203-000679 C145
2203-000679 C153
2203-000679 C205
2203-000679 C215
2203-000679 C217
2203-000679 C218
2203-000679 C225
2203-000679 C230
2203-000679 C332
2203-000679 C336
2203-000679 C337
2203-000679 U601
2203-000812 C213
2203-000812 C236

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SGH-N620E ElectricalPartsList
4-4
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SEC Code Design LOC
2203-000812 C237
2203-000812 C244
2203-000812 C245
2203-000812 C246
2203-000812 C249
2203-000812 C250
2203-000812 C306
2203-000812 C315
2203-000812 C319
2203-000812 C321
2203-000854 C214
2203-000854 C226
2203-000854 C228
2203-000854 C234
2203-000854 C235
2203-000995 C220
2203-001017 C227
2203-001017 C229
2203-001072 C311
2203-001101 C128
2203-001153 C148
2203-001383 C304
2203-001405 C301
2203-001405 C302
2203-001405 C316
2203-001405 C317
2203-001405 C318
2203-001405 C324
2203-001405 C330
2203-001405 C331
2203-003054 C131
2203-003054 C204
2203-003054 C248
2203-005050 C310
2203-005050 C312
2203-005061 C104
2203-005061 C118
SEC Code Design LOC
2203-005061 C122
2203-005061 C123
2203-005061 C124
2203-005061 C125
2203-005061 C129
2203-005061 C132
2203-005061 C135
2203-005061 C137
2203-005061 C139
2203-005061 C143
2203-005061 C149
2203-005061 C150
2203-005061 C151
2203-005061 C158
2203-005061 C201
2203-005061 C202
2203-005061 C203
2203-005061 U640
2203-005065 C101
2203-005065 C138
2203-005065 C146
2203-005065 C159
2203-005234 C305
2203-005234 C307
2203-005444 C231
2203-005444 C303
2203-005480 C219
2203-005480 C224
2203-005481 C233
2203-005482 C154
2203-005482 C163
2203-005503 C213
2203-005503 C211
2203-005664 C117
2203-005664 C130
2203-005664 C133
2203-005840 C113

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SGH-N620E ElectricalPartsList
4-5
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SEC Code Design LOC
2203-005840 C114
2203-005840 C116
2203-005840 C119
2203-005840 C121
2203-006053 C127
2203-006093 C109
2203-006105 C155
2203-006190 C162
2404-001101 C115
2404-001105 C103
2404-001105 C140
2404-001105 C144
2404-001105 C322
2404-001239 C102
2404-001239 C221
2404-001239 C323
2404-001268 C160
2503-001053 CA100
2503-001053 CA101
2703-001723 L304
2703-001723 L305
2703-001747 L302
2703-001749 L311
2703-001752 L102
2703-001938 L310
2703-002205 L309
2703-002484 L303
2703-002485 L306
2801-003747 OSC201
2809-001264 OSC301
2901-001116 F101
2901-001254 L120
2904-001417 F302
2904-001470 F301
2909-001197 U301
3301-001362 L101
3404-001152 SW101
SEC Code Design LOC
3404-001152 SW102
3705-001242 CN301
3709-001263 CN101
3710-001105 CN104
3710-001105 CN105
3710-001595 CN103
3722-001715 CN200
4302-001130 U636
GH61-00026A ANT301

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5-1
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5. SGH-N620E BlockDiagrams
1.MainBaseband
SYSTEM CLOCK
(13MHz)
SRAM
FLASH
EEPROM
RTC_CLOCK
(32.768KHz)
KEYPAD
LCD
ONE C
Li-ion BATT
(STANDARD)
CHARGING
CIRCUIT
SIM CARD
BATTERY TYPE
BATTERY
VOLTAGE
PHONE
TEMPRATURE
CHARGING
CURRENT
XVCC
3VRF
VDD3.0
AVCC2.5
LVCC
PLL
AFC
A/D
INTERFACE
I/O
INTERFACE
SERIAL DATA
INTERFACE
RF INTERFACE
BB INTERFACE
MIC
SPEAKER
RTC_VCC
LED3V3

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SGH-N620EBlockDiagrams
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2.Main RF
SI4200F (U302)
Dual PAM (U303)
Si4133T-BM (U305)
Si4201-BM (U304)
CN301
RF
CONNECTOR
U301
ANTTENA
S/W
F301
SAW
FILTER
F302
SAW
FILTER
RF
PLL IF PLL
PD
LPF
CHANNEL
FILTER
DAC
DAC
OSC301
VCTCXO
I
Q
VP40578
AFC
I
Q
PGA
PGA
PGA
PGA
ADC
ADC
100KH
z
PGA
PGA
/
/
/
/ /
/
/
/
/
/
/
/
/
/
/
EGSM RX
925~960 MHz
(CH62:947.4MHz)
DCS RX
1805~1880 MHz
(CH698:1842.4M
Hz)
DCS TX
1710 ~ 1785 MHz
(CH698:1747.4MHz)
GSM TX
880 ~ 915 MHz
(CH62:902.4MH
z)

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SGH-N620EBlockDiagrams
5-3
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3.RFTransmitPart
Si4200-F (U302)
Dual PAM (U303)
CN301
RF
CONNECTOR
U301
ANTTENA
S/W
PD
LPF
DCS TX
1710 ~ 1785 MHz
(CH698:1747.4MHz)
EGSM TX
880 ~ 915 MHz
(CH62:902.4MHz)
AFC
PDNB
VP40578
I
Q
SDATA
SCLK
SENB
PDNB
TxPower ②
TXEN ①
6
7
8
Si4133T-BM ( U305)
RF
PLL
IF
PLL
OSC301
VCTCXO
J2
3VRI
BANDSEL
_BANDSEL
ANT. S/W
CONTROL
CIRCUIT
2 11
Tx(DCS)
Tx(GSM)
VC1 VC2
LH
HL
Rx L L
<EGSM>
1279 ~ 1314 MHz
<DCS>
1327 ~ 1402 MHz
<EGSM>
880 ~ 895 MHz : 798 MHz
895 ~ 900 MHz : 790 MHz
900 ~ 915 MHz l 798 MHz
<DCS>
766 MHz
23,24
-6dBm
@1301.4 MHz (G)
-9dBm
@1364.4 mhZ (D)
12,13
26,27
9,10
-6dBm
@798 MHz
-9dBm
@766 MHz
5
6
7
8
31
9
7 2 4
24
25
1
7
9
?
Tx power
from U 205
3VRF
BAND SELECTION
VREG
②
+VBATT
TXEN
from U 205
①

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SGH-N620EBlockDiagrams
5-4
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4.RFReceivePart
DCS RX
1805 ~ 1880 MHz
(CH62:1842.4 MHz)
Si4200F (U302)
①
I
Q
SDATA
SCLK
SENB
VP40578
(U205)
PDNB ②
AFC ③
Si4201-BM (U304)
CHANNEL
FILTER
DAC
DAC
PGA
PGA
100
KHz
/
/
/
/
/
/
Mixer
PGA
PGA
ADC
ADCLNA
LNA /
/ /
/
/
/
GSM : /2
Si4133T-BM (U305)
RF
PLL OSC301
VCTCXO
U301
ANTTENA
S/W
F301
SAW
FILT
ER
F302
SAW
FILT
ER
CN301
RF
CONNECTOR
-50dBm
@947.067 MHz
-50dBm
@1842.467 MHz
2
38
10 1
EGSM RX
925 ~ 960 MHz
(CH62:947.4 MHz)
-51dBm -50dBm
-52dBm
-52dBm
21,22
17,18
3,4 3,4
1 1
1,2
1,2
11,12
11,12
④
-50dBm
-54dBm
@67KHz
5
4
3
2
-6dBm
@1895.6 MHz (G)
-9dBm
@1842.3 MHz (D)
23,24
<EGSM>
1849.8 ~ 1919.8 MHz
<DCS>
1804.9 ~ 1879.9 MHz
12,13 31
9
7 14
4
27

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6. SGH-N620E PCB Diagrams
6-1
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1.MainPCB TopDiagram