Page 1: Table Of Contents
GSM TELEPHONE SGH-E750 CONTENTS GSM TELEPHONE Specification Circuit Description Exploded Views and Parts List Electrical Parts List Block Diagrams PCB Diagrams Flow Chart of Troubleshooting...
Page 2 ⓒ Samsung Electronics Co.,Ltd. September. 2005 This Service Manual is a property of Samsung Electronics Co.,Ltd. Any unauthorized use of Manual can be punished under applicable Printed in Korea. International and/or domestic law. Code No.: GH68-08355A BASIC.
Page 3: Specification
5pcl ~ 19pcl 0pcl ~ 15pcl 0pcl ~ 15pcl Sensiti vity - 102dBm -102dBm -100dBm -100dBm TDMA Mux Cel l Radi us 35Km 35Km SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 4: Gsm Tx Power Class
8±4dBm 9±5 dBm 6±4 dBm 6±4 dBm 7±5 dBm 4±4 dBm 4±4 dBm 5±5 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 with out Samsung' s authorization...
Page 5: Circuit Description
GPRS. The modulated signal out of the transceiver is fed into Power Amplifer Module(U101). PAM output signal is radiated to the air through FEM(MODULE1) and antenna. SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung ' s authorization...
Page 6 LEDs for sub key and eight white LEDs for main key. Main and Sub key LED use the 3.3V LDO for a supply voltage. KEY_LED_ON signal enables eight white LED. SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung ' s authorization...
Page 7 YMU765 (melody IC). It has 64 kbyte SC RAM (0.5 Mbit) and 32 kbyte SC program ROM for bootstrap loader in the ARM core. SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung ' s authorization...
Page 8 KXP74 is Tri-axis Orthogonal accelerometers and inclinometers. The KXP74 utilizes an onboard Serial Peripheral Interface (SPI) for digita l communication. PCF5213EL1 apply KXP74 for G- button and game SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung ' s authorization...
Page 9 QMP01 QME03 QME01 QCA02 QVO08 QMI01 QCA01 QLC01 QMO01 QSP01 QVO01 QAN02 QFL01 QHI01 QRF01 QRE01 QCR06 QCK01 QSC14 QCW01 QMW02 QCR07 QBA01 QCR06 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung' s authorization...
Page 10: Exploded Views And Parts List
GH73-05134A ¡ ¡ QFL01 MEC-FOLDER LOWER;SGH-E750,EU,-,-,-,- GH75-07643A ¡ ¡ QHI01 MEC-HINGE;SCH-S400,SKT,-,-,-,-,-,- GH75-07998A ¡ ¡ QRE01 MEC-REAR COVER;SGH-E750,EU,-,-,-,-,B GH75-07642A ¡ ¡ QCW01 MEC-CAMERA DECO;SGH-E750,EU,-,-,-,-, GH75-07646A SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung' s authorization...
Page 11: Sec Code
MPR-BOHO VINYL LCD CONN;SGH-E730,#95 GH74-15350A MPR-FOLDER SHEET;SGH-E750,PC SHEET,5 GH74-16514A MPR-SHEET FPC MODE KEY;SGH-E750,PC S GH74-16523A MPR-BOHO VINYL M/WIN ADD;SGH-E750,3M GH74-16525A MPR-BOHO VINYL MAIN WIN;SGH-E750,ST- GH74-16526A SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung' s authorization...
Page 12 3-3-2. RF Test Cable 3-3-3. Test Cable 3-3-4. Serial Cable (GH39-00283A) (GH39-00337A) (CSA LL64151-A) 3-3-5. Power Supply Cable 3-3-7. TA 3-3-6. DATA CABLE (GH44-00482A) (GH39-00331A] SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung' s authorization...
Page 13: Electrical Parts List
C- CERAMIC, CHIP 2203-005482 C616, C617 C- CERAMIC, CHIP 2203-000854 C619 C- CERAMIC, CHIP 2203-006137 C700 C- CERAMIC, CHIP 2203-002443 C702 C- CERAMIC, CHIP 2203-006562 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung' s authorization...
Page 14 R- CHIP 2007-007014 R122, R 124, R 128, R 131 CHIP 2007-000170 R123 R- CHIP 2007-001303 R201, R 208, R 300, R 308 CHIP 2007-000171 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung' s authorization...
Page 15 U301 MEMORY 1108-000022 U302 1204-002138 U304 1209-001618 U306 0801-002882 U400 1203-003767 U401 1203-002837 U402 1203-003787 U404 BATTERY 4302-001177 U405 1203-003568 U500 DIODE-TV S 0406-001188 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung' s authorization...
Page 16 VARI STOR 1405-001082 Z D500 DIODE-Z ENER 0403-001547 Z D600, Z D601 DIODE-TV S 0406-001208 Z D701, Z D702, Z D703 DIODE-TV S 0406-001203 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung' s authorization...
Page 17: Block Diagrams
5. Block Diagrams 5-1. RF Solution Block Diagram SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 18 Block Diagrams 5-2. Base Band Solution Block Diagram SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung ' s authorization...
Page 19: Pcb Diagrams
6. PCB Diagrams 6-1. PCB Top Diagram SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 20 PCB Diagrams 6-2. PCB Bottom Diagram SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
Page 21: Flow Chart Of Troubleshooting
Check for the clock at C303 Check the clock generation circuit (related to U100) = 26MHz Y e s Check the initial operation Y e s 7-36 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 22 Flow Chart of Troubleshooting SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 23 Flow Chart of Troubleshooting SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 24 Y e s Is U200 R203, R204 Check the U200 OK ? Y e s Check the 16bit data signal Y e s SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 25 Flow Chart of Troubleshooting SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 26: Charging Part
U503 pin 3 = " L " ? AUX_ O N signal Y e s Check the U503 pin 10 Resolder or replace U503 ¡ Ö 4.2V Y e s SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 27 CRDL C505 C506 D500 ICDL +VBUS 3 _PPR GND 8 AUX_ON _CHG USBON 7 END_OF_CHG USB_CHG_ON IMIN CHG_ON R513 R514 C507 BATTERY CHARGING SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 28: Sim Part
Check SIMCLK Signal on Check the Clock pin3 of SIM400 in a few Y e s Check the SIM Card Y e s SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 29 GND 51 C427 NC 53 R407 TP400 +VDD_IO_HIGH AUX_ON C428 C429 32KHz_DIGIT R408 PON_TX +VDD_IO_LOW REF_ON C430 SIMRST SIMCLK R409 MIC_BIAS RSTON IT_PMU SIMIO SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 30: Microphone Part
Check the JACK _ E N signal = ' H ' ? Y e s Check the MIC Replace the MIC Y e s 7-10 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 31 C603 C602 MIC600 MIC_P MIC_CP C606 R602 C604 C605 MIC_N R603 Close to microphone C607 Close to MCP ZD600 C608 R604 MAIN_MIC 7-11 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 32 Y e s Check LCD Module Replace LCD Module Y e s Check speaker Replace SPK SPK+ , SPK- = Operate Y e s 7-12 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 33 19 19 20 20 LD(7) KEY_ROW(4) LD(8) KEY_COL(0) LD(9) LD(10) AMP_EN LD(11) LED_RED LD(12) LED_GREEN LD(13) LED_BLUE LD(14) MELODY_SEL LD(15) HFR_N HFR_P 7-13 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 34 Flow Chart of Troubleshooting 7-14 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 35: Key Data Input
KE Y _ R OW(0 , 4 ) , KEY _ C OL(0, 4 ) signal is OK ? Y e s 7-15 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 36 Flow Chart of Troubleshooting VOL700 KEY_ROW(3) V_UP KEY_ROW(4) V_DOWN KEY_COL(1) V_COMMON GND1 NEW_VOLUM_KEY2 VOLUME_KEY VOL701 KEY_ROW(3) KEY_COL(0) NEW_VOLUM_KEY_1 CAMERA_KEY ONKEYN End_Key 7-16 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 37 Flow Chart of Troubleshooting 7-17 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 38: Receiver Part
CN700 pin 37, 38 Y e s LCD MODULE Change the LCD Module SPK + , - PAD = 1.5V? Y e s 7-18 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 39 19 19 20 20 LD(7) KEY_ROW(4) LD(8) KEY_COL(0) LD(9) LD(10) AMP_EN LD(11) LED_RED LD(12) LED_GREEN LD(13) LED_BLUE LD(14) MELODY_SEL LD(15) HFR_P HFR_N 7-19 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 40 Flow Chart of Troubleshooting 7-20 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 41 Check the IC8 & the related circuit IC8 PIN 2 ¡ Ã Vbat ? Y e s Replace the LCD Module Y e s 7-21 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 42 Flow Chart of Troubleshooting 7-22 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 43: Key Back Light
LED701 LED702 LED703 LED700 LED708 LED704 LED705 LED706 LED707 LED709 LED710 LED711 LED712 LED713 LED715 LED717 LED718 LED719 LED720 LED721 LED722 LED723 7-23 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 44: Camera Part
CN 704 Pin 1 , 20 = 2.8V ? Replace the Camera Module Y e s Check the camera module Change the PBA Y e s 7-24 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 45 15 15 Y(6) Y(5) M_SCL 20 20 19 19 MCLK M_SDA 24 24 23 23 S_RESET 25 25 FLASH_OUT 1.3M 1/4 LSI Senser(0.9T) 7-25 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 46 Flow Chart of Troubleshooting 7-26 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 47 BLUETOOTH does not work Y e s Check the U200 R126 = ' H ' Y e s Replace U703 Replace ANT102 Y e s 7-27 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 48: Gsm Receiver
RF26MHz , RF PSU Part Y e s Y e s Resolder U100 C142 , C146 > = 1V Y e s Check U200 7-28 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 49: Gsm Transmitter
> = 1V > = 2 .7V RF26MHz , RF PSU Part Y e s Y e s Resolder U100 Check U200 7-29 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 50: Dcs Receiver
RF26MHz , RF PSU Part Y e s Y e s Resolder U100 C142 , C146 > = 1V Y e s Check U200 7-30 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 51: Dcs Transmitter
> = 1V > = 2 .7V RF26MHz , RF PSU Part Y e s Y e s Resolder U100 Check U200 7-31 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 52: Pcs Receiver
RF26MHz , RF PSU Part Y e s Y e s Resolder U100 C142 , C146 > = 1V Y e s Check U200 7-32 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 53: Pcs Transmitter
U100 , C147 , R117 > = 2 .7V RF26MHz , RF PSU Part Y e s Y e s Resolder U100 Check U200 7-33 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 54 Flow Chart of Troubleshooting 7-34 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 55 Flow Chart of Troubleshooting 7-35 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...
Page 56 Flow Chart of Troubleshooting 7-36 SAMSUNG Proprietary-Contents may change without notice This Document can not be used with out Samsung' s authorization...

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