Page 1: Table Of Contents
UMTS TELEPHONE SGH-J750 UMTS TELEPHONE CONTENTS Safety Precautions Specification Product Function Array course control Exploded View and Parts List MAIN Electrical Parts List Block Diagrams PCB Diagrams Flow Chart of Troubleshooting 10. Reference data 11. Disassembly and Assembly Instructions...
Page 2 China china.samsungportal.com Asia asia.samsungportal.com Mideast & Africa mea.samsungportal.com ⓒ This Service Manual is a property of Samsung Electronics Co.,Ltd. Samsung Electronics Co.,Ltd. Any unauthorized use of Manual can be punished under applicable International and/or domestic law. 2007. 9. Rev.1.0...
Page 3: Safety Precautions
― Don't use as you pleases after change other material than replacement registered on SEC System. Otherwise engineer in charge isn't charged with problem that you don't keep this rules. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 4 ― You must maintain electric contact between ESD and place due to be set up until ESD is connected completely to the proper place or a circuit board. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 5: Specification
( ma x + 24dBm) Sen sitivity -102 dBm -102 dBm -100 dBm - 100d Bm - 106.7 dBm TDMA Mu x Cell Radius 3 5Km 3 5Km SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 6: Gsm Tx Power Class
11±3 dBm 8±4dBm 8±4dBm 9±3dBm 6±4 dBm 6±4 dBm 7±3 dBm 4±4 dBm 4±4 dBm 5±3 dBm 2±5 dBm 2±5 dBm 0±5 dBm 0±5 dBm SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 7: Product Function
― Support 64 note polyphonic ringtones, MP3 ringtones, and AAC ringtones ― Tripple band(900/1800/1900MHz), WCDMA2100 ― VGA Camera ― GPRS Class 10 ― EGPRS Class E2 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 8 Product Function SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 9: Array Course Control
4. TA (Travel Adaptor - S20pin ) [ GH44-01702A 5. Data Link Cable : USB cable (S20) [ GH39-00922A 6. Serial cable: PC to JIG SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 10: Software Downloading
– J750XAGF3.tfs : Default file system to be put into in initial production 4-2-2. Pre-requsite for Downloading • Downloader Program(J750 Downloader V8.exe) • SGH-J750 Mobile Phone • USB Data Link Cable • Binary files SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 11 Include "Calset Data" and "All Images Download to NOR + NAND" 2. Press the button "D/L Bootloader" and then check '"OK" for downloading Bootloader. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 12 Array course control 3. Select the binary file what you want to download 4. Now press the button 'START' and SGH-J750 connets with cable SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 13 Array course control 5. When checking is completed, Press Nand Erase. 6. Now press the button 'Download'. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 14: Exploded View And Parts List
QVO01 QCK01 QKP02 QBT02 QCA02 QSH01 QSP01 QME02 QCA01 QAN02 QLC01 QMP02 QIF01 QPC01 QRE01 QSD01 QCR05 QFL01 QCR05 QBA01 QFR00 QHI01 QSC05 QFR01 QBA00 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 15: Cellular Phone Parts List
GH98-05281A QFL01 ASSY CASE-SLIDE LOWER GH98-05282A QHI01 ASSY HINGE-MULTI TORSION SPRIN GH98-05822A QRE01 ASSY CASE-REAR GH98-05284A QIF01 PMO COVER-IF GH72-42445A QSD01 PMO COVER-MICRO SD GH72-42446A SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 16 GH74-34775A TAPE ELEC-PCB LCD 2 GH74-34776A TAPE GASK-LCD LOWER 1 GH74-34777A VINYL-BOHO REAR GH74-35375A TAPE INSU-SUB PCB GH74-35446A TAPE-COVER RF GH74-35492A VINYL-BOHO UPPER MAIN GH74-35608A SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 17 Exploded View and Parts List SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 18: Main Electrical Parts List
C-CER,CHIP 2203-006423 C212 C-CER,CHIP 2203-006423 C214 C-CER,CHIP 2203-006979 C215 C-CER,CHIP 2203-006423 C219 C-CER,CHIP 2203-006305 C-CER,CHIP 2203-006399 C220 C-CER,CHIP 2203-006399 C221 C-CER,CHIP 2203-006423 C222 C-CER,CHIP 2203-000254 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 19 C-CER,CHIP 2203-000233 C366 C-CER,CHIP 2203-000940 C-CER,CHIP 2203-006562 C400 C-CER,CHIP 2203-006824 C401 C-CER,CHIP 2203-006399 C403 C-CER,CHIP 2203-006562 C404 C-CER,CHIP 2203-006399 C405 C-CER,CHIP 2203-006399 C406 C-CER,CHIP 2203-006399 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 20 2203-006423 C514 C-CER,CHIP 2203-000812 C515 C-CER,CHIP 2203-000812 C516 C-CER,CHIP 2203-000812 C517 C-CER,CHIP 2203-006423 C518 C-CER,CHIP 2203-006423 C519 C-CER,CHIP 2203-006399 C520 C-CER,CHIP 2203-006423 C521 C-CER,CHIP 2203-006194 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 21 2203-003054 C719 C-CER,CHIP 2203-006048 C720 C-CER,CHIP 2203-000995 C721 C-CER,CHIP 2203-006048 C723 C-CER,CHIP 2203-003054 C724 C-CER,CHIP 2203-001259 C725 C-CER,CHIP 2203-006048 C726 C-CER,CHIP 2203-006048 C727 C-CER,CHIP 2203-001259 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 22 0403-001547 D804 DIODE-ZENER 0403-001547 D808 DIODE-TVS 0406-001275 D900 DIODE-TVS 0406-001231 D901 DIODE-TVS 0406-001231 D902 DIODE-TVS 0406-001231 D903 DIODE-TVS 0406-001231 D904 DIODE-TVS 0406-001231 D905 DIODE-TVS 0406-001231 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 23 BEAD-SMD 3301-001438 L800 BEAD-SMD 3301-001438 L801 BEAD-SMD 3301-001438 L802 BEAD-SMD 3301-001438 L803 BEAD-SMD 3301-001534 L804 BEAD-SMD 3301-001534 L901 INDUCTOR-SMD 2703-001990 L902 BEAD-SMD 3301-001812 LED1 0601-002258 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 24 R-CHIP 2007-008542 R314 R-CHIP 2007-000171 R-CHIP 2007-001294 R400 R-CHIP 2007-000171 R402 R-CHIP 2007-000171 R403 R-CHIP 2007-000171 R404 R-CHIP 2007-000148 R405 R-CHIP 2007-000171 R407 R-CHIP 2007-000171 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 25 2007-000171 R527 R-CHIP 2007-000171 R528 R-CHIP 2007-000171 R529 R-CHIP 2007-000171 R531 R-CHIP 2007-008581 R532 R-CHIP 2007-008581 R533 R-CHIP 2007-008581 R534 R-CHIP 2007-008581 R535 R-CHIP 2007-008581 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 26 2007-001339 R819 R-CHIP 2007-000162 R820 R-CHIP 2007-000162 R822 R-CHIP 2007-009108 R823 R-CHIP 2007-007573 R824 R-CHIP 2007-007489 R900 R-CHIP 2007-009168 R901 R-CHIP 2007-009168 R902 R-CHIP 2007-009168 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 27 0801-003016 U406 IC-CMOS LOGIC 0801-003016 U600 IC-MODEM 1205-003103 U601 IC-CMOS LOGIC 0801-003016 U700 IC-AUDIO AMP 1201-002606 U800 IC-CMOS LOGIC 0801-003016 U801 IC-ANALOG SWITCH 1001-001394 6-10 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 28 ZD800 DIODE-TVS 0406-001208 ZD804 DIODE-TVS 0406-001254 ZD805 DIODE-TVS 0406-001254 ZD806 DIODE-TVS 0406-001254 ZD807 DIODE-TVS 0406-001254 ZD900 DIODE-TVS 0406-001254 ZD901 DIODE-TVS 0406-001254 ZD902 DIODE-TVS 0406-001254 6-11 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 29 Main Electrical Parts List 6-12 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 30: Block Diagrams
7. Block Diagrams 7-1. RF Solution Block Diagram SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 31 Block Diagrams 7-2. Base Band Solution Block Diagram SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 32: Pcb Diagrams
8. PCB Diagrams SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 33 PCB Diagrams Bottom SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 34: Flow Chart Of Troubleshooting
Check the OSC400 OSC400 is 32.768Khz? Check the PMIC(U402) related Level Each Level Shifter and PMIC outputs are OK? Shifer output Check the initial operation SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 35 Flow Chart of Troubleshooting SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 36 Flow Chart of Troubleshooting SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 37: Sim Part
After Power ON, Check C908(SIM_CLK Signal) Check the Clock in a few second After SIM card insert, Replace PBA SIM_RST (C907) = "H"? Check the SIM Card SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 38 Flow Chart of Troubleshooting SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 39: Speaker Part
9-3. Speaker Part Speaker does not work C703(VDD_B_2.9V) = Check the U402 2.9V Check the U713 work Check the U713 correctly Is Speaker working? Change the Speaker SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 40 Flow Chart of Troubleshooting SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 41: Microphone Part
Microphone does not work Check the connection Resolder MIC from MIC Check the circuit Resolder the related component from UCP500 to MIC Check the MIC Replace the MIC SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 42 Flow Chart of Troubleshooting SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 43: Key Data Input
Check the Dome sheet & Key Pad pushed, is it displayed on LCD? When one of the keys is Replace the PBA pushed, KEY_IO signal is OK? 9-10 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 44: Lcd Back Light
Flow Chart of Troubleshooting 9-6. LCD Back Light Backlight does not work R816(LCD_LED_ON) of Check the UCP500 HDC801 is high? Replace the LCD Module 9-11 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 45 Flow Chart of Troubleshooting 9-12 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 46: Camera Part
Connect the LCD connector Check the LCD connector Check the camera Connect the camera module connector HDC801 PIN49 Check UCP500 (CAM_VDD_EN) = 'H'? Replace the camera module 9-13 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 47 Flow Chart of Troubleshooting 9-14 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 48: Charging Part
Flow Chart of Troubleshooting 9-8. Charging Part "Charging" function does not work Check the TA connection Check the U402 PIN 28 = '5V' ? check the U402 9-15 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 49 Flow Chart of Troubleshooting 9-16 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 50: Gsm Receiver
RF input : CH center freq : +67.7kHz Amp : -50dBm C131 Resolder RFC100(RF CN) >= -53dBm C120 = 2.5V Resolder U402(PMIC) C121,C127,C128 =0V C207,C208 >= -60dBm Resolder RFS100(ASM) Resolder U200(TRANCEIVER) 9-17 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 51: Gsm Transmitter
Resolder or Change R120 ≥ 30dBm PAM100 pin7 Check PAM100 Resolder or Change PAM100 ≥ -4dBm pin2,3,4,5,8 is ok? Check VBAT or PAM control signal Check UCP200 9-18 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 52: Dcs Receiver
Amp : -50dBm C131 Resolder RFC100(RF CN) >= -53dBm C120 =2.5V Resolder U402(PMIC) C121, C128= 1.5V C127=0V C232,C234 Resolder RFS100(ASM) >= -60dBm Resolder U201(TRANCEIVER) 9-19 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 53: Dcs Transmitter
Resolder or Change L106 ≥ 25dBm PAM100 pin1 Check PAM100 Resolder or Change PAM100 ≥ -4dBm pin2,3,4,5,8 is ok? Check VBAT or PAM control signal Check UCP200 9-20 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 54: Pcs Receiver
Amp : -50dBm C131 Resolder RFC100(RF CN) >= -53dBm C120 =2.5V C121 = 1.5V Resolder U402(PMIC) C127, C128= 0V C226,C229 Resolder RFS100(ASM) >= -60dBm Resolder U201(TRANCEIVER) 9-21 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 55: Pcs Transmitter
Resolder or Change L106 ≥ 25dBm PAM100 pin1 Check PAM100 Resolder or Change PAM100 ≥ -4dBm pin2,3,4,5,8 is ok? Check VBAT or PAM control signal Check UCP200 9-22 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 56: Wcdma Receiver
Resolder RFS100(ASM) >= -60dBm L336 Resolder DUF302(Duplexer) >= -60dBm C353 Check U402(PMIC) >=2.75V C319 Resolder U301(LNA) >= -50dBm C237,C239 Resolder F202(SAW) >= -53dBm Resolder U200(TRANCEIVER) 9-23 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 57: Wcdma Transmitter
Resolder or Change PAM303 ≥ -5dBm pin2,3,4,5,8 is ok? Check VBAT or PAM control signal F303 pin8 Resolder or Change L310, L312 ≥ -5dBm Check UCP600 9-24 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 58 Flow Chart of Troubleshooting 9-25 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 59 Flow Chart of Troubleshooting 9-26 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 60 Flow Chart of Troubleshooting 9-27 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 61 Flow Chart of Troubleshooting 9-28 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 62: Reference Data
― QPSK: Quadrature Phase Shift Keying ― RS : Reed-Solomon ― SI : Service Information ― TDM : Time Division Multiplexing ― TS : Transport Stream 10-1 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 63 Reference data 10-2 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 64: Disassembly And Assembly Instructions
Detach the MOTOR to the FRONT. Remove REAR Case. Separate the PBA from the FRONT. 1) Be care of scratch. 1) Be care of scratch. 11-1 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 65 Detach the SHIELD CAN, BT COVER, VOLUME KEY, CAMERA Detach the KEY PAD. KEY. 1) Be care of the scratch. 1) Be care of scratch. 11-2 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 66 Disassembly and Assembly Instructions Detach the INTENNA soldering parts. 1) Be care of damage to the INTENNA PATTERN 11-3 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 67 Detach the SPEAKER, QCIF CAMERA, 1.3 MEGA CAMERA, UPPER ass'y. 1) Be care of scratch and molding damage. 1) Be care of damage to the LCD MODULE. 11-4 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 68 1) Be care of damage to the SLIDE FPCB. Disjoin the SPEAKER CONNECTORs, QCIF CAMERA, 1.3 MEGA CAMERA of the PBA. 1) Be care of damage to the SPEAKER WIREs. 11-5 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 69: Assembly Instructions
1)Be care of damege to the PBA. Attach the ELECTRIC TAPE, Attach the INTENNA and soldering. FLOODING LABEL. 1)Contracting the HOOK first before soldering. 1) Be care of the scratch. 11-6 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 70 Screw the five points. KEY. 1)Before attach be care of direction. 1)Be care of the scratch. Bolding the MOTOR wire. 1)Don't forget to attach the rubber. 11-7 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 71 1)Be care of damege to the PBA. Attach the both faces TAPEs. Attach the electric conduction TAPEs. 1)Don't forget to detach the label. 1)Attach the straightly. 11-8 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 72 1)Be care of damage to the PBA. Join the VGA CAMERA, 1.3 MEGA CAMERA and SPEAKER. 1)Be care of damage to the PBA. 1)Be care of damage to the PBA. 11-9 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 73 Disassembly and Assembly Instructions Join the SLIDE FPCB into SUB PBA Attach the electric TAPE. CONNECTOR. 1)Attach the electric conduction TAPE. 1)Be care of scratch. 11-10 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 74 SPEAKER. Combine the FRONT with the LOWER. Pull out the FPCB into hall. 1)Move left the SPRING. 1)Be care of damage to the FPCB. 11-11 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 75 1)Be care of scratch. Screw up 2 points in the red circle. Attach the MAIN KEY PAD. 1)Be care of the scratch. 1)Be care of scratch. 11-12 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 76 Attach the PBA,MOTOR into FRONT. Screw up 4 points in the red circle.. 1)Be care of damage to the MOTOR wire. 1)Assemble bottom first. 11-13 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 77 Disassembly and Assembly Instructions 11-14 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

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