ELECTRONICS

DUAL BAND Mobile Cellular Phone

SGH-T400

SERVICE
DUAL BAND MOBILE CELLULAR PHONE

Manual

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
Samsung Electronics Co.,Ltd. Printed in Korea 12/2002 Rev 1.0 GH68-03158A
1. Exploded Views and Parts List
1-1 1-2 1-3 1-4 1-5 1-6 1-7 1-8 1-9 1-10 Main Main Parts List Travel Adapter Travel Adapter Parts List Ciger Light Adapter Ciger Light Adapter Parts List Test Jig EAR Microphone Data Kit Battery Charger

2. PCB Diagrams

2-1 2-2 Main Top Main Bottom

3. Electrical Parts List

3-1 3-2 Main Parts List Top Main Parts List Bottom

4. Block Diagrams

4-1 4-2 Main Baseband Main RF 4-2-1 RF Transmit Part 4-2-2 RF Receive Part
5. Flow Chart of Troubleshooting and Circuit Diagrams
5-1 5-2 5-3 5-4 5-5 5-6 5-7 5-8 5-9 5-10 5-11 5-12 5-13 5-14 Power ON Initial Charging Part Sim Part Microphone Part Speaker Part Key Data Input Alert Tone Ring Indicator Back Light GSM Receiver GSM Transmitter DCS Receiver DCS Transmitter
Exploded Views and Parts List
1. SGH-T400 Exploded Views and Parts List

1-1 Main

1-2 Main Parts List

Location No.

Description
DUAL WINDOW LCD FOLDER UPPER LCD SPEAKER MOTOR FOLDER LOWER WINDOW LCD SCREW SCREW CAP FRONT COVER KEYPAD MAIN PBA VOLKEY F-PCB DOME SHEET MIC CONNECTOR COVER SIDE KEY ANTENNA REAR COVER RF/COVER SCREW BATTERY

SEC CODE

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 GH43-00662A

Remark

1-3 Travel Adapter
1-4 Travel Adapter Parts List

A B C D

GH44-00171A GH44-00184A GH44-00171C Gh44-00171E

REMARK

CHINA EUROPE UNITED KINGDOM TAIWAN

1-5 Ciger Light Adapter

1-6 Ciger Light Adapter Parts List

DESCRIPTION

Ciger Light Adapter Code

GH44-00170A

1-7 Test Jig

TEST JIG

GH80-10508A

TEST JIG CABLE

GH39-00079A

RF CABLE

GH39-00182A

1-7-1 Test Jig

DC POWER SUPPLY
8922 or 8960 WIRELESS COMMUNICATIONS TEST SET

232 CABLE

Note PC
1-8 Wearable EAR Microphone

Wearable EAR Microphone

GH59-00394B

1-9 Data Kit

DATA KIT

GH39-00143B

1-10 Battery Charger

BATTERY CHARGER

GH44-00279A

2-1 Main Top

PCB Diagrams

2-2 Main Bottom

3-1 Main Parts List Top

NO Refer ence

39 D300 D400 D314 Q100 Q302 Q305 Q103 Q101 Q102 Q306 Q303 U409 U407 U304 U106 U305 U405 U100 U406 U105 U103 TH1 V302 V405 V406 V301 V303 V400 V403 V407 V408 R105 R317 R468 R474 R106 R300 R313 R102
0401-001033 0406-001083 0407-001007 0501-000225 0501-002011 0502-001201 0504-001049 0504-001058 0504-001058 0505-001332 0506-001004 0801-002540 1001-001145 1001-001183 1201-001889 1203-002127 1203-002187 1203-002598 1205-002035 1205-002185 1209-001434 1404-001256 1405-001018 1405-001019 1405-001019 1405-001082 1405-001082 1405-001082 1405-001082 1405-001093 1405-001093 2007-000138 2007-000138 2007-000138 2007-000139 2007-000140 2007-000140 2007-000140 2007-000141

Part Description

DIODE-SWITCHING;MCL4154 DIODE-TVS;ESDA6V1W5 DIODE-ARRAY;UMN1 TR-SMALL SIGNAL;2SC4617 TR-SMALL SIGNAL;2SD2114KT146V TR-POWER;ZXT13P20DE6 TR-DIGITAL;DTA114YET1 TR-DIGITAL;RN4985-TE85L TR-DIGITAL;RN4985-TE85L FET-SILICON;FDG6301N TR-ARRAY;UMC5NTL IC-CMOS LOGIC;NC7SZ19P6X IC-ANALOG SWITCH;MAX4599EXT-T IC-ANALOG SWITCH;MAX4684EUB COMP-SMD;RF3110 IC-BATTERY;LTC1734ES6-4.2#TR IC-BATTERY;MAX6326XR26-T COMP-SMD;LP2981AIMX-2.8 COMP-SMD;VP40578 IC-INTERFACE;SI4201-BM IC-PLL/SYNTHESISER;SI4133T-BM COMP-SMD;B57231-V2473-J60 VARISTOR;VC060314A300R VARISTOR;VC060305A150R VARISTOR;VC060305A150R VARISTOR;VC040205X150R VARISTOR;VC040205X150R VARISTOR;VC040205X150R VARISTOR;VC040205X150R COMP-SMD;AVL 14K COMP-SMD;AVL 14K R-CHIP;100,5% R-CHIP;100,5% R-CHIP;100,5% R-CHIP;220,5% R-CHIP;1K,5% R-CHIP;1K,5% R-CHIP;1K,5% R-CHIP;2.2K,5%

GRP1555C1H330JZ01E GRP1555C1H330JZ01E GRP1555C1H330JZ01E GRP1555C1H330JZ01E GRP1555C1H330JZ01E GRP1555C1H330JZ01E GRP1555C1H330JZ01E GRP1555C1H330JZ01E GRP1555C1H330JZ01E GRP1555C1H330JZ01E GRP1555C1H330JZ01E GRP1555C1H330JZ01E GRP1555C1H330JZ01E GRP1555C1H3R0CZ01E CM05CG040C50AT GRP1555C1H8R0DZ01E GRP1555C1H8R0DZ01E CL05F223ZANC CL05F223ZANC CL05F223ZANC CL05F223ZANC CL05F223ZANC CL05F223ZANC CL05F223ZANC CL05F223ZANC CL05F223ZANC C1005CG1H090CT C1005CG1H090CT C1005CG1H090CT ECUW1H1R8CCQ ECUW1H1R8CCQ MCH153F104ZK MCH153F104ZK MCH153F104ZK MCH153F104ZK MCH153F104ZK MCH153F104ZK C1608Y5V1A105ZT C1608Y5V1A105ZT C1608Y5V1A105ZT GRP1555C1H1R2CZ01E GRP1555C1H1R2CZ01E GRM40X7R391K200PT

246 247

Refer ence
C483 C140 C491 C145 C482 C488 C492 C304 C457 C461 C302 C306 C308 C312 C314 C102 C105 C338 C131 C311 C485 C339 C341 L101 L109 L100 L105 L107 L111 L400 X1 F401 F402 L302 L401 CN4
2203-005382 2203-005444 2203-005444 2203-005450 2203-005480 2203-005480 2203-005481 2203-005482 2203-005503 2203-005503 2203-006105 2203-006105 2203-006105 2203-006105 2203-006105 2404-001105 2404-001105 2404-001105 2404-001134 2404-001134 2404-001162 2404-001268 2503-001041 2703-001751 2703-001751 2703-001943 2703-002170 2703-002176 2703-002203 2703-002269 2801-004025 2901-001234 2901-001234 3301-001120 3301-001362 3710-001816 3722-001715 4302-001119
C-CERAMIC,CHIP;6PF C-CERAMIC,CHIP;3PF C-CERAMIC,CHIP;C030B,3PF,50V C-CERAMIC,CHIP;C5R6B,5.6PF,50V C-CERAMIC,CHIP;C333K,33NF,10V C-CERAMIC,CHIP;C333K,33NF,10V C-CERAMIC,CHIP;C473K,47NF,10V C-CERAMIC,CHIP;C104K,100NF,10V C-CERAMIC,CHIP;C1801J,180PF,25V C-CERAMIC,CHIP;C1801J,180PF,25V C-CERAMIC,CHIP;C475K,4.7UF,6.3V C-CERAMIC,CHIP;C475K,4.7UF,6.3V C-CERAMIC,CHIP;C475K,4.7UF,6.3V C-CERAMIC,CHIP;C475K,4.7UF,6.3V C-CERAMIC,CHIP;C475K,4.7UF,6.3V C-TA,CHIP;10UF/6.3V C-TA,CHIP;10UF/6.3V C-TA,CHIP;10UF/6.3V C-TA,CHIP;100UF/6.3V C-TA,CHIP;100UF/6.3V C-TA,CHIP;F950G476MAAJZTQ2 C-TA,CHIP;10UF/10V COMP-SMD;CAP_4ARRAY_100PF INDUCTOR-SMD;LL1005-FH3N9S INDUCTOR-SMD;LL1005-FH3N9S INDUCTOR-SMD;HK1005-10NJ-T INDUCTOR-SMD;CIH05T6N8JNC INDUCTOR-SMD;CIH05T2N7SNC INDUCTOR-SMD;CIH05T15NJNC INDUCTOR-SMD;CIH05T56NJNC CRYSTAL-UNIT;FC-255 FILTER-EMI SMD;NFA31GD4704704D FILTER-EMI SMD;NFA31GD4704704D CORE-FERRITE BEAD;BLM21P300SPT CORE-FERRITE BEAD;BLM10A102SGPT CONNECTOR-SOCKET;1004-0018-319 JACK-PHONE;02-828P0-53BKA BATTERY-LI;RB414II06N

GRM40X7R391K200PT CM05CG3R0B50AH CM05CG3R0B50AH GRP1555C1H5R6BZ01E GRP155R71A333KA01E GRP155R71A333KA01E GRP155R71A473KA01E GRP155R61A104KA01E C1005CG1E181JT C1005CG1E181JT GRM219R60J475KE11D GRM219R60J475KE11D GRM219R60J475KE11D GRM219R60J475KE11D GRM219R60J475KE11D TESVSP0J106M8RTJ TESVSP0J106M8RTJ TESVSP0J106M8RTJ 595D107X06R3B2T 595D107X06R3B2T F950G476MAAJZTQ2 F951A106MPAAQ2 W2A43A101KAT2A LL1005-FH3N9S LL1005-FH3N9S HK1005-10NJ-T CIH05T6N8JNC CIH05T2N7SNC CIH05T15NJNC CIH05T56NJNC FC-255 NFA31GD4704704D NFA31GD4704704D BLM21P300SPT BLM10A102SGPT 1004-0018-319 02-828P0-53BKA RB414II06N

248 EARC305

3-2 Main Parts List Bottom
D313 Q300 U401 U402 Q304 Q301 D301 D303 D304 D305 D306 D308 D309 D310 D307 D311 U403 U400 U302 V401 V402 V304 R315 R316 R465 R339 R400 R470 R338 R323 R322 R408 R409 R487 R458 R471 R330 R343 R311 R312 R328
0406-001083 0504-001012 0504-001060 0504-001060 0505-001570 0506-001052 0601-001543 0601-001611 0601-001611 0601-001611 0601-001611 0601-001611 0601-001611 0601-001611 0601-001611 0601-001611 0801-002540 1009-001010 1204-001960 1405-001019 1405-001082 1405-001082 2007-000138 2007-000138 2007-000148 2007-000152 2007-000157 2007-000157 2007-000157 2007-000162 2007-000162 2007-000162 2007-000162 2007-000162 2007-000162 2007-000168 2007-000775 2007-001244 2007-001301 2007-001306 2007-001325
DIODE-TVS;ESDA6V1W5 TR-DIGITAL;DTC114YE TR-DIGITAL;BCR08PN TR-DIGITAL;BCR08PN FET-SILICON;SI1865DL TR-ARRAY;UMH9N-TN COMP-SMD;HL500-F01 LED;SLS-NNWH102TS LED;SLS-NNWH102TS LED;SLS-NNWH102TS LED;SLS-NNWH102TS LED;SLS-NNWH102TS LED;SLS-NNWH102TS LED;SLS-NNWH102TS LED;SLS-NNWH102TS LED;SLS-NNWH102TS IC-CMOS LOGIC;NC7SZ19P6X IC-HALL EFFECT S/W;A3212ELH-SAMSUNG IC-MELODY;YMU762 MA-3 VARISTOR;VC060305A150R VARISTOR;VC040205X150R VARISTOR;VC040205X150R R-CHIP;100,5% R-CHIP;100,5% R-CHIP;10K,5% R-CHIP;20K,5% R-CHIP;47K,5% R-CHIP;47K,5% R-CHIP;47K,5% R-CHIP;100K,5% R-CHIP;100K,5% R-CHIP;100K,5% R-CHIP;100K,5% R-CHIP;100K,5% R-CHIP;100K,5% R-CHIP;470K,5% R-CHIP;33K,5% R-CHIP;91K,5% R-CHIP;68,5% R-CHIP;150,5% R-CHIP;3.3K,5%
ESDA6V1W5 DTC114YE BCR08PN BCR08PN SI1865DL UMH9N-TN HL500-F01 SLS-NNWH102TS SLS-NNWH102TS SLS-NNWH102TS SLS-NNWH102TS SLS-NNWH102TS SLS-NNWH102TS SLS-NNWH102TS SLS-NNWH102TS SLS-NNWH102TS NC7SZ19P6X A3212ELH-SAMSUNG YMU762 MA-3 VC060305A150R VC040205X150R VC040205X150R ERJ2GEJ101X ERJ2GEJ101X ERJ2GEJ103X MCR01MZSJ203 ERJ2GEJ473X ERJ2GEJ473X ERJ2GEJ473X RC1005J104CS RC1005J104CS RC1005J104CS RC1005J104CS RC1005J104CS RC1005J104CS ERJ2GEJ474X ERJ2GEJ333X RC1005J913CS ERJ2GEJ680X MCR01MZSJ151 MCR01MZSJ332
R310 R308 R309 R301 R302 R303 R304 R305 R306 R344 R341 R340 R329 R321 R320 C328 C401 C464 C465 C337 C321 C420 C479 C419 C418 C334 C466 C486 C403 C500 C499 C323 C330 C402 C333 C340 C336 C327 C322 C329
2007-007008 2007-007009 2007-007009 2007-007009 2007-007009 2007-007009 2007-007009 2007-007009 2007-007009 2007-007090 2007-007107 2007-007590 2007-007771 2007-007771 2011-001344 2203-000233 2203-000254 2203-000254 2203-000254 2203-000254 2203-000438 2203-000679 2203-000679 2203-000679 2203-000679 2203-000679 2203-000812 2203-000854 2203-002443 2203-003054 2203-003054 2203-005061 2203-005061 2203-005061 2203-005061 2203-005061 2203-005065 2203-005483 2404-001086 2404-001086

SAW Filter LNA PGA ADC PGA DAC

Channel Filter

F101 SAW Filter LNA Mixer F100 PGA ADC PGA DAC

4-2 Main RF

Si4200 (U104) I

Si4201 (U105)

EGSM RX 925~960 MHz (CH62 : 947.4 MHz)
DCS RX 1805~1880 MHz (CH698 : 1842.4 MHz) 100 kHz

RF Conector (CN1)

Antenna S/W (U107)

Si4133T

RF PLL IF PLL

(U103)

VCTCXO (U102)

VP40578 (U406)

DCS TX 1710 ~ 1785 MHz (CH698 : 1747.4 MHz)

SDATA SCLK SENB PDNB

Dual PAM (U106)
EGSM TX 880 ~ 915 MHz (CH62 : 902.4 MHz)
2.8VTX TXEN2 from U406 Rx L L VC1 VC2 Tx(GSM) L H Tx(DCS) H L

Ant. S/W Control Circuit

Si4133-T

23,7 VCTCXO (U102)

4-2-1 RF Transmit Part

RF PLL

<EGSM> 1279 ~ 1314 MHz <DCS> 1327 ~ 1402 MHz

IF PLL

26,27 -6dBm @ 1301.4 MHz (G) -9dBm @ 1364.4 MHz (D) 12,13 9,10
<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

VP40578

(U406)

24 PD 25

BAND Selection - GSM : Low - DCS : High SDATA SCLK SENB +VBATT 2.8VRFVCC BAND Selection VREG Txpower from U406

Si4200 (U104)

Txpower TXEN2
3,4 LNA 11,12 PGA ADC PGA DAC

-52dBm 17,18 1,2

-52dBm 21,22 11,12 Mixer LNA PGA ADC PGA DAC 1,2
-50dBm (G) -54dBm (D) @ 67 kHz

4-2-2 RF Receive Part

SAW Filter (F101) GSM : /kHz

SAW Filter (F100)

1 -51dBm 12,7 14

SCLK SENB

-52dBm
EGSM RX 925~960 MHz (CH62 : 947.4 MHz) -6dBm @ 1895.6 MHz (G) -9dBm @ 1842.3 MHz (D) 23,24 9
DCS RX 1805~1880 MHz (CH698 : 1842.4 MHz)
<EGSM> 1849.8 ~ 1919.8 MHz <DCS> 1804.9 ~ 1879.9 MHz
- 50dBm @ 947.067 MHz - 50dBm @ 1842.467 MHz

5-1 Power ON

'POWER ON'does not work
Check the Battery Voltage is more than 3.4V?

Charge the Battery

The node between D300 and C305 > 2.8 V ?
Check U300 and the path from +VBATT to C305
When the "END" key is pressed, D314 pin 1> 3.4V ?

Replace the PBA

Yes No
U301 pin 1, 2, 9 > 3.4V ? Check the circuit related to U301
U301 pin 10 = 2.5 V ? Check U301 and related circuit
Check for the clock signal at R103
Check the clock generation circuit (related to U102 and Q100)
Check the initial operation
Flow Chart of Troubleshooting and Circuit Diagrams

5-2 Initial

Initial Failure
Downloading SW is OK ? (Is CSROM signal OK ?)
After power on, check and repair the important signals of U406 as follows
The node between R456 and C462 = "H" (RST)
Check the circuit related to reset
R461 = "H" (BOOT) Resolder R461
Check all the other connection by Test S/W R471 = "H" (MSIZE)

Resolder R471

Check the circuit around LCD
R484 = "L" (EXTPROC) Resolder R484
Check the circuit around U408(EEPROM) and data stored in it Replace PBA
R456 SYSRST C462 CSROM _CE

VDD3.0

R492 R491

R471 MSIZE

MC_PDN

SIMPWDN_BOOT

5-3 Charging Part

Abnormal charging part

Check the CN4-1 pin 17,18 > 4.9 V ? Replace TA
Check the U305 pin 3 > 4.9 V ? Resolder C339
R342(CHG_ON side) = "L" ? Resolder R342
Check the U305 pin 5 4.2V ?
Resolder components around U305

5-4 Sim Part

Phone can't access SIM card
Q304 pin 4 = 3.0 V ? Resolder R338
Q304 pin 5 = "H" ? Replace Q304 or Replace PBA
Q304 pin 2, 3 = 3.0 V ? Replace Q304

Replace PBA

After Power ON, Check SIMCLK Signal on CN302 pin 3 in a few second
After SIM card insert, CN302 pin 2 = "H"(SIMRST) ?
Check the circuit around U408 (Serial EEPROM) and data stored in it

VDD3. 0

4 S2 D2 D2 R1 ON/OF F R1,C1 SI1865D L 3 R338 47K 6 5

C336 1UF

C337 10NF

R339 20K

R335 4.7K

SIMRST SIMCLK

CN302 PC-D6-A6-H2.9-S (VCCSIM ) (RST) (CLK) G G G G 8 7

(GND) (VPP) (SIMDATA)

SIMDATA C341 100PF

SIMPWREN

5-5 Microphone Part

Microphone does not work

Check the connection from MIC

Resolder MIC FPCB

Check the circuit related to U406
Resolder the R468, R469, R472, R474, C482, C485 and C488
Check the MIC Replace the MIC

5-6 Speaker Part

Speaker does not work
R471 = "H"? (MC_PDN)

U105 pin 13 = "H" ? Resolder R118
Check the clock signal at Pin1 of U302
U304 pin 3, 9 = 1.8 V ? Resolder U304
CN100 pin 5, 6 = 1.8 V ? Resolder CN100
Check the depression of the SPK pins

Modify the SPK pins

Is Speaker working? Change the Speaker

IOVD D

MEL13M D(2) D(3) D(4) D(5) D(6) D(7) VIBRATO R +VBATT 2 M_LED LED D3 D4 D17 C319 3PF C320 27PF SPKSPK_EN RECC325 27PF C326 27PF M_IRQ 4 /RST 5 NC D6 D7 MTR SPOUT2 SPOUT1 PLLC 7 VDD VSS 9 VREF R328 3.3K /IRQ 24

1 CLKI D2 25

R325 10K

M_RESET

C318 10NF

U302 YMU762 MA-3

HPOUT-L/MONO

HPOUT-R

SPVD D
VDD3.0 A(1) RWR D(0) D(1) R322 100K 27 M_CS RD U4 R5 V+ NO1 COM1 IN1 NC 1 NO2 COM2 IN2 NC 2 GND MAX4684EU B 6 RSPK + SPK_EN REC+ C321 1NF 15 C323 100NF C324 100NF +VBATT RC327 220NF C329 4.7U F 6.3V C330 100NF R330 1.2K C328 1.2NF R343 6.8K R344 2.2K C332 100NF LINE_OUT

5-7 Key Data Input

Check Initial operation
When one of the keys is pushed, is it displayed on LCD

Check the Dome sheet

Keypad is OK ? Replace the PBA

5-8 Receiver Part

5-9 Ring Indicator
5-10 Back Light (for Color Main LCD)

Backlight does not work

LCD Contrast high level in the menu ?
Select LCD Contrast high level
CN100 pin 11 = "H" ? U401 pin 2 = "H" ?
Check for the pulse signal at CN100 pin 15
Replace the PBA Resolder U401
Check the circuit related to U400
END Replace the LCD module
5-11 Back Light (for Sub LCD & Key)
Backlight "ON" mode in the menu?
Select backlight "ON" mode

GPIO7 by test S/W

Q302 pin 1 = "H" ?

LCD BACKLIGHT Yes No

R484 = "H" ?

KEY PCB LED

GPIO2 by test S/W
Check the CN100 pin 2 = "H" ?

Check the CN201 pin 2

LCD backlight on ? Replace EL sheet

Resolder R313, R314 END

Resolder Q302
Q302 pin 3 = "L" ?

Key LED on ?

Resolder R301~R309 and D303~D311

5-12 GSM Receiver

5-13 GSM Transmitter

5-14 DCS Receiver

5-15 DCS Transmitter

L100 10nH

2V8RFVCC

C107 10NF

R100 91K UVcont 2 GND C109 10NF RCLK13M R104 27K R106 1K TCO-9141E(2.8V) OutPut 3 Vcc C108 10NF R102 2.2K 4

R101 10K

Q100 2SC4617

R105 100

GND 32 GND 8 NC 51 PDNB SD O 11 SEN B SCL K 20K 14 GND NC 51 SD I RFLD RFLC GND RFLB RFLA 9