Samsung SGH-T400 Service Manual Download Page 49

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5-25

Flow Chart of Troubleshooting and Circuit Diagrams

VC1 : GSM TX

VC2 : DCS TX

VC1

VC2

Tx(GSM)

Tx(DCS)

Antenna S/W Control Circuit

3.9nH

L107

0.5PF

C152

5.6pF

C145

15nH

L11

L10

8.2n

R113

22K

Q101

PEMD10

33nH

L108

L104

2.7n

C13

100uF

GSMI

GSMOUT

TXEN

VBAT T

VCC1

VCC2

VCCO

VRAM

VRE

U106

RF3140

DCSI

DCSOUT

ANT1

27PF

C136

100PF

C13

Q103

DTA114YET1

R121

C13

C147

27PF

10P

C143

PEMD10

Q102

R11

100K

R116

33PF

C133

L105 NC

22K

R11

R115 10

OUT

27PF

C142

CON1

MS-156(02)

27P

C141

C15

33PF

GSM_RX

GSM_TX

VC1

VC2

C14

U107

LMG002S-5047A

DCS_R

DCS_TX

C15

15PF

27PF

C13

100PF

L109

3.9n

L110

VC1

BANDSEL

VC2

TXPOWE

2V8RFVCC

+VBATT

GSMT

DCST

VC1

DCSR

GSMR

VC1

VC2

2V8RFVCC

TXEN2

Summary of Contents for SGH-T400

Page 1: ... BAND Mobile Cellular Phone SGH T400 Manual DUAL BAND MOBILE CELLULAR PHONE CONTENTS 1 Exploded Views and Parts List 2 PCB Diagrams 3 Electrical Parts List 4 Block Diagrams 5 Flow Chart of Troubleshooting and Circuit Diagrams ...

Page 2: ...Samsung Electronics Co Ltd Printed in Korea 12 2002 Rev 1 0 GH68 03158A ELECTRONICS ...

Page 3: ...trical Parts List 3 1 Main Parts List Top 3 2 Main Parts List Bottom 4 Block Diagrams 4 1 Main Baseband 4 2 Main RF 4 2 1 RF Transmit Part 4 2 2 RF Receive Part 5 Flow Chart of Troubleshooting and Circuit Diagrams 5 1 Power ON 5 2 Initial 5 3 Charging Part 5 4 Sim Part 5 5 Microphone Part 5 6 Speaker Part 5 7 Key Data Input 5 8 Alert Tone 5 9 Ring Indicator 5 10 Back Light 5 11 GSM Receiver 5 12 G...

Page 4: ...1 2 Exploded Views and Parts List 1 SGH T400 Exploded Views and Parts List 1 1 Main 1 2 3 4 5 6 7 22 10 11 12 14 16 17 18 20 21 8 9 19 15 13 ...

Page 5: ...EYPAD MAIN PBA VOLKEY F PCB DOME SHEET MIC CONNECTOR COVER SIDE KEY ANTENNA REAR COVER RF COVER SCREW BATTERY Description SEC CODE Location No GH72 05005A GH75 02368A GH96 01231A 3001 001360 3101 001294 GH75 02369A GH72 05004A 6001 001429 GH74 03025A GH75 02367A GH75 02371A GH92 01367A GH59 00593A GH59 00598A GH59 00611A GH73 01331A GH75 02372A GH42 00236A GH75 02370A GH73 01332A 6001 001479 GH43 ...

Page 6: ...1 4 Exploded Views and Parts List 1 4 Travel Adapter Parts List TYPE SEC CODE REMARK A GH44 00171A CHINA B GH44 00184A EUROPE C GH44 00171C UNITED KINGDOM D Gh44 00171E TAIWAN 1 3 Travel Adapter A B C D ...

Page 7: ...Exploded Views and Parts List 1 5 1 5 Ciger Light Adapter 1 6 Ciger Light Adapter Parts List DESCRIPTION SEC CODE REMARK Ciger Light Adapter Code GH44 00170A BLACK ...

Page 8: ...Exploded Views and Parts List 1 6 1 7 Test Jig TEST JIG GH80 10508A TEST JIG CABLE GH39 00079A RF CABLE GH39 00182A ...

Page 9: ...Exploded Views and Parts List 1 7 1 7 1 Test Jig DC POWER SUPPLY 232 CABLE TEST JIG CABLE RF CABLE 8922 or 8960 WIRELESS COMMUNICATIONS TEST SET Note PC ...

Page 10: ...1 8 Exploded Views and Parts List 1 9 Data Kit DATA KIT GH39 00143B 1 10 Battery Charger 1 8 Wearable EAR Microphone Wearable EAR Microphone GH59 00394B BATTERY CHARGER GH44 00279A ...

Page 11: ...2 1 PCB Diagrams 2 PCB Diagrams 2 1 Main Top ...

Page 12: ...2 2 PCB Diagrams 2 2 Main Bottom ...

Page 13: ...03 002598 COMP SMD LP2981AIMX 2 8 LP2981AIMX 2 8 19 U406 1205 002035 COMP SMD VP40578 VP40578 20 U105 1205 002185 IC INTERFACE SI4201 BM SI4201 BM 21 U103 1209 001434 IC PLL SYNTHESISER SI4133T BM SI4133T BM 22 TH1 1404 001256 COMP SMD B57231 V2473 J60 B57231 V2473 J60 23 V302 1405 001018 VARISTOR VC060314A300R VC060314A300R 24 V405 1405 001019 VARISTOR VC060305A150R VC060305A150R 25 V406 1405 001...

Page 14: ...K 5 RC1005J104CS 59 R314 2007 000162 R CHIP 100K 5 RC1005J104CS 60 R332 2007 000162 R CHIP 100K 5 RC1005J104CS 61 R334 2007 000162 R CHIP 100K 5 RC1005J104CS 62 R336 2007 000162 R CHIP 100K 5 RC1005J104CS 63 R402 2007 000162 R CHIP 100K 5 RC1005J104CS 64 R403 2007 000162 R CHIP 100K 5 RC1005J104CS 65 R405 2007 000162 R CHIP 100K 5 RC1005J104CS 66 R466 2007 000162 R CHIP 100K 5 RC1005J104CS 67 R467...

Page 15: ...90 2007 007771 R CHIP 0 5 RC1005J000CS 107 R491 2007 007771 R CHIP 0 5 RC1005J000CS 108 R342 2007 008117 R CHIP 2 7K 1 ERJ2RKF2701X 109 R489 2011 001345 R NETWORK EXB28V103JX EXB28V103JX 110 C404 2203 000138 C CERAMIC CHIP C152K 1 5NF 50V CL05B152KBNC 111 C113 2203 000233 C CERAMIC CHIP C101J 100PF 50V GRP1555C1H101JD01E 112 C114 2203 000233 C CERAMIC CHIP C101J 100PF 50V GRP1555C1H101JD01E 113 C1...

Page 16: ...0679 C CERAMIC CHIP C270J 27PF 50V GRP1555C1H270JZ01E 147 C141 2203 000679 C CERAMIC CHIP C270J 27PF 50V GRP1555C1H270JZ01E 148 C142 2203 000679 C CERAMIC CHIP C270J 27PF 50V GRP1555C1H270JZ01E 149 C146 2203 000679 C CERAMIC CHIP C270J 27PF 50V GRP1555C1H270JZ01E 150 C147 2203 000679 C CERAMIC CHIP C270J 27PF 50V GRP1555C1H270JZ01E 151 C148 2203 000679 C CERAMIC CHIP C270J 27PF 50V GRP1555C1H270JZ...

Page 17: ...03 001405 C CERAMIC CHIP C223Z 22NF 25V CL05F223ZANC 189 C118 2203 001405 C CERAMIC CHIP C223Z 22NF 25V CL05F223ZANC 190 C119 2203 001405 C CERAMIC CHIP C223Z 22NF 25V CL05F223ZANC 191 C125 2203 001405 C CERAMIC CHIP C223Z 22NF 25V CL05F223ZANC 192 C128 2203 001405 C CERAMIC CHIP C223Z 22NF 25V CL05F223ZANC 193 C129 2203 001405 C CERAMIC CHIP C223Z 22NF 25V CL05F223ZANC 194 C130 2203 001405 C CERA...

Page 18: ...5 2404 001105 C TA CHIP 10UF 6 3V TESVSP0J106M8RTJ 229 C338 2404 001105 C TA CHIP 10UF 6 3V TESVSP0J106M8RTJ 230 C131 2404 001134 C TA CHIP 100UF 6 3V 595D107X06R3B2T 231 C311 2404 001134 C TA CHIP 100UF 6 3V 595D107X06R3B2T 232 C485 2404 001162 C TA CHIP F950G476MAAJZTQ2 F950G476MAAJZTQ2 233 C339 2404 001268 C TA CHIP 10UF 10V F951A106MPAAQ2 234 C341 2503 001041 COMP SMD CAP_4ARRAY_100PF W2A43A10...

Page 19: ...U400 1009 001010 IC HALL EFFECT S W A3212ELH SAMSUNG A3212ELH SAMSUNG 19 U302 1204 001960 IC MELODY YMU762 MA 3 YMU762 MA 3 20 V401 1405 001019 VARISTOR VC060305A150R VC060305A150R 21 V402 1405 001082 VARISTOR VC040205X150R VC040205X150R 22 V304 1405 001082 VARISTOR VC040205X150R VC040205X150R 23 R315 2007 000138 R CHIP 100 5 ERJ2GEJ101X 24 R316 2007 000138 R CHIP 100 5 ERJ2GEJ101X 25 R465 2007 00...

Page 20: ...103K16AT 62 C321 2203 000438 C CERAMIC CHIP C102K 1NF 50V C1005X7R1H102KT 63 C420 2203 000679 C CERAMIC CHIP C270J 27PF 50V GRP1555C1H270JZ01E 64 C479 2203 000679 C CERAMIC CHIP C270J 27PF 50V GRP1555C1H270JZ01E 65 C419 2203 000679 C CERAMIC CHIP C270J 27PF 50V GRP1555C1H270JZ01E 66 C418 2203 000679 C CERAMIC CHIP C270J 27PF 50V GRP1555C1H270JZ01E 67 C334 2203 000679 C CERAMIC CHIP C270J 27PF 50V ...

Page 21: ...ircuit Li Ion Battery Slim Standard ONE C VIBRATOR SYSTEM CLOCK 13MHz EEPROM RTC_CLOCK 32 768KHz KEY_BOARD SIM CARD RECEIVER MIC LCD RF INTERFACE 2V8RFVCC LVCC DVCC2 5 RTC_2V8 RTC_VCC 2V8AERO AVCC2 5 VDD3 0 Serial Data Interface I O Interface A D Interface BB INTERFACE MELODY IC 40 Poly SPEAKER SRAM 32M bit FLASH 96M bit ...

Page 22: ...01 SAW Filter F100 LNA LNA PGA PGA ADC ADC VCTCXO U102 EGSM TX 880 915 MHz CH62 902 4 MHz DCS TX 1710 1785 MHz CH698 1747 4 MHz Dual PAM U106 Antenna S W U107 RF Conector CN1 Si4200 U104 RF PLL IF PLL Si4133T U103 PD LPF Mixer Channel Filter PGA PGA DAC DAC 100 kHz Si4201 U105 VP40578 U406 I Q I Q SDATA SCLK SENB PDNB ...

Page 23: ...C VBATT Txpower from U406 2 8VRFVCC 8 2 8VTX TXEN2 from U406 VC1 VC2 Ant S W Control Circuit BAND Selection VREG BAND Selection GSM Low DCS High EGSM 1279 1314 MHz DCS 1327 1402 MHz 6dBm 1301 4 MHz G 9dBm 1364 4 MHz D 2 11 5 3 9 11 7 1 24 25 5 6 7 8 31 1 3 7 26 27 23 24 12 13 9 10 IF PLL 9 2 EGSM 880 895 MHz 798 MHz 895 900 MHz 790 MHz 900 915 MHz 798 MHz DCS 766 MHz 6dBm 798 MHz 9dBm 766 MHz 1 2 ...

Page 24: ...07 RF Conector CN1 Si4200 U104 RF PLL Si4133 T U103 Mixer Channel Filter PGA PGA DAC DAC 100 kHz I O Si4201 U105 I Q EGSM 1849 8 1919 8 MHz DCS 1804 9 1879 9 MHz GSM 2 2 1 8 10 1 1 1 3 4 3 4 17 18 21 22 1 2 1 2 11 12 11 12 5 4 3 2 SDATA SCLK SENB AFC 1 3 7 7 23 24 12 13 PDNB 31 9 14 50dBm 947 067 MHz 50dBm 1842 467 MHz 51dBm 52dBm 6dBm 1895 6 MHz G 9dBm 1842 3 MHz D 52dBm 52dBm 50dBm G 54dBm D 67 ...

Page 25: ...Yes Yes Check U300 and the path from VBATT to C305 The node between D300 and C305 2 8 V No Yes When the END key is pressed D314 pin 1 3 4V Replace the PBA No END U301 pin 1 2 9 3 4V Check the circuit related to U301 No Yes Check the initial operation U301 pin 10 2 5 V Check U301 and related circuit No Yes Check for the clock signal at R103 Check the clock generation circuit related to U102 and Q10...

Page 26: ...Flow Chart of Troubleshooting and Circuit Diagrams 5 2 ...

Page 27: ...Downloading SW is OK Is CSROM signal OK The node between R456 and C462 H RST No Check the circuit related to reset R461 H BOOT No Resolder R461 Yes R471 H MSIZE No Resolder R471 Yes R484 L EXTPROC No Resolder R484 Yes Replace PBA Check all the other connection by Test S W Check the circuit around LCD Check the circuit around U408 EEPROM and data stored in it Yes ...

Page 28: ...Flow Chart of Troubleshooting and Circuit Diagrams 5 4 U406 U302 U404 VDD3 0 VDD3 0 R456 C462 R461 R471 MC_PDN SIMPWDN_BOOT F VPP SYSRST GPIO3 MSIZE CSROM _CE VDD3 0 R491 F_WP U409 R492 ...

Page 29: ... 5 5 3 Charging Part Abnormal charging part Replace TA Check the CN4 1 pin 17 18 4 9 V No Yes Yes Check the U305 pin 3 4 9 V Resolder C339 Yes No R342 CHG_ON side L Resolder R342 Yes No Resolder components around U305 Check the U305 pin 5 4 2V END Yes No ...

Page 30: ...5 6 Flow Chart of Troubleshooting and Circuit Diagrams ...

Page 31: ...Check the circuit around U408 Serial EEPROM and data stored in it Yes Phone can t access SIM card Yes Q304 pin 2 3 3 0 V Replace Q304 Yes No After Power ON Check SIMCLK Signal on CN302 pin 3 in a few second After SIM card insert CN302 pin 2 H SIMRST Replace PBA Replace PBA Yes No No Q304 pin 4 3 0 V Yes No Resolder R338 ...

Page 32: ...s 5 8 GND VPP SIMDATA VCCSIM CLK RST SIMPWREN 6 6 7 G G 8 9 G G 10 VDD3 0 5 SIMRST SIMCLK SIMDATA 4 7K R335 C341 100PF R338 47K C337 10NF 1UF C336 1 4 S2 20K R339 Q304 SI1865D L 2 D2 3 D2 5 ON OF F R1 C1 6 R2 CN302 PC D6 A6 H2 9 S 1 1 2 2 3 3 4 4 5 5 ...

Page 33: ...Resolder MIC FPCB Check the connection from MIC END No Yes Yes Check the circuit related to U406 Resolder the R468 R469 R472 R474 C482 C485 and C488 Yes No Check the MIC No Replace the MIC Yes 5 9 Flow Chart of Troubleshooting and Circuit Diagrams ...

Page 34: ...5 10 MIC VDD3 0 C482 C488 R468 R474 R469 R472 U406 VXI1P VXI1N C485 Flow Chart of Troubleshooting and Circuit Diagrams ...

Page 35: ...in 13 H No No Resolder R118 Yes Yes Check the clock signal at Pin1 of U302 No Check the clock generation circuit related to U102 and Q100 Yes Modify the SPK pins Check the depression of the SPK pins Is Speaker working Change the Speaker END No Yes Yes No U304 pin 3 9 1 8 V CN100 pin 5 6 1 8 V Yes Yes No No Resolder U304 Resolder CN100 ...

Page 36: ...POUT1 17 18 SPOUT2 SPVD D 15 22 D5 D6 21 20 D7 12 EQ 1 EQ 2 13 14 EQ 3 10 HPOUT L MONO HPOUT R 11 30 A0 CLKI 1 27 D0 D1 26 D2 25 24 D3 D4 23 2 NO1 10 NO2 V 1 C325 COM1 3 COM2 9 GND 6 4 IN1 8 IN2 NC 1 5 NC 2 7 R326 MAX4684EU B U304 1 2NF C328 12 220NF 27PF C320 C327 VBATT 100NF C332 R343 6 8K R321 0 27PF C326 C330 100NF 0 R329 SPK SPK REC SPK_EN SPK_EN REC M_IRQ 10K R325 D 0 D 1 D 2 D 3 D 4 D 5 D 6...

Page 37: ...of Troubleshooting and Circuit Diagrams 5 13 5 7 Key Data Input Check Initial operation Check the Dome sheet When one of the keys is pushed is it displayed on LCD Keypad is OK END Replace the PBA Yes No Yes Yes No ...

Page 38: ...5 14 5 8 Receiver Part Flow Chart of Troubleshooting and Circuit Diagrams ...

Page 39: ...5 15 Flow Chart of Troubleshooting and Circuit Diagrams ...

Page 40: ...5 16 Flow Chart of Troubleshooting and Circuit Diagrams 5 9 Ring Indicator ...

Page 41: ...LCD END Backlight does not work Select LCD Contrast high level LCD Contrast high level in the menu CN100 pin 11 H No Yes Yes No Replace the PBA Check for the pulse signal at CN100 pin 15 Replace the LCD module No Yes U401 pin 2 H Resolder U401 Yes Check the circuit related to U400 No END ...

Page 42: ...o Yes No LCD BACKLIGHT KEY PCB LED Resolder R313 R314 Q302 pin 1 H No Yes Resolder Q302 Q302 pin 3 L No Yes Yes END Key LED on Resolder R301 R309 and D303 D311 No Backlight does not work Select backlight ON mode Backlight ON mode in the menu No R484 H Yes Yes GPIO2 by test S W No Q302 pin 1 H GPIO7 by test S W Yes 5 11 Back Light for Sub LCD Key ...

Page 43: ...5 19 Flow Chart of Troubleshooting and Circuit Diagrams 5 12 GSM Receiver ...

Page 44: ...Flow Chart of Troubleshooting and Circuit Diagrams 5 20 5 13 GSM Transmitter ...

Page 45: ...5 21 Flow Chart of Troubleshooting and Circuit Diagrams 5 14 DCS Receiver ...

Page 46: ...Flow Chart of Troubleshooting and Circuit Diagrams 5 22 5 15 DCS Transmitter ...

Page 47: ...P 21 GND GND 22 29 GND GND 30 3 IFLA IFLB 2 IFLO N 26 27 IFLO P NC 1 GND 31 GND GND 32 GND 4 GND 6 15 GND 18 GND SI4133T BM U103 GND 2 3 OutPut Vcc 4 1 Vcont C116 100PF 3 9nH L101 U102 TCO 9141E 2 8V 22NF C110 C113 100PF RB520S 30 D100 Q100 2SC4617 2 3 1 R103 560 R100 91K 27K R104 100 R105 R106 1K C108 10NF R102 2 2K 10K R101 10NF C109 C107 10NF L100 10nH IFLO N RFLOP RFLON PDNB PDNB_O SYNEN1 SENB...

Page 48: ... 22 GND 23 GND 24 GND 12 ION IOP 11 14 PDNB RXI N 5 RXI P 4 SI4201 BM CKN 10 9 CKP GND 1 GND 8 GND 13 GND 21 8 TXQN TXQ P 7 VDD1 23 14 VDD2 32 VDD3 26 VDD4 U105 18 RFIPN RFIPP 17 13 RFLO N 12 RFLOP 24 RFO D RFO G 25 TXIN 6 TXI P 5 IOP 2 L1 29 28 L2 PDNB 31 20 RFIDN RFIDP 19 22 RFIGN RFIGP 21 30 GND GND 33 34 GND 35 GND 36 GND IFLO N 10 9 IFLO P 1 ION 3 CKN 4 CKP 16 DIAG 1 DIAG 2 15 GND 11 GND 27 3...

Page 49: ...5 U106 RF3140 BS 2 DCSI N 1 DCSOUT 11 ANT1 27PF C136 10K 100PF C13 4 Q103 DTA114YET1 1 3 2 R121 C13 8 C147 1NF 27PF E2 10P F C143 PEMD10 Q102 2 B1 5 B2 6 C1 3 C2 1 E1 4 R11 7 10K 100K R116 33PF C133 L105 NC 22K R11 4 R115 10K 3 G1 G2 4 1 IN 2 OUT 27PF C142 CON1 MS 156 02 27P F C141 C15 0 33PF G5 12 G6 13 G7 14 GSM_RX 10 GSM_TX 5 VC1 2 VC2 11 C14 6 U107 LMG002S 5047A ANT 8 DCS_R X 1 DCS_TX 3 G1 4 G...

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