Samsung SGH-E750 Service Manual
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Samsung SGH-E750 Service Manual

Samsung SGH-E750 Service Manual

Gsm telephone
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  • 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 Downloaded from www.Manualslib.com manuals search engine...
  • 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. Downloaded from www.Manualslib.com...

  • Page 3: Specification

    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 without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • Page 4: Gsm Tx Power Class

    9±5 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 without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • 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 without Samsung's authorization Downloaded from www.Manualslib.com...
  • 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 without Samsung's authorization Downloaded from www.Manualslib.com...
  • 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 without Samsung's authorization Downloaded from www.Manualslib.com...
  • Page 8 The KXP74 utilizes an onboard Serial Peripheral Interface (SPI) for digital communication. PCF5213EL1 apply KXP74 for G- button and game SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 9 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 Downloaded from www.Manualslib.com manuals search engine...

  • Page 10: Exploded Views And Parts List

    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 Downloaded from www.Manualslib.com manuals search engine...
  • Page 11 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 Downloaded from www.Manualslib.com manuals search engine...
  • Page 12 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 Downloaded from www.Manualslib.com manuals search engine...

  • Page 13: Electrical Parts List

    2203-000278 C602,C608 C-CERAMIC,CHIP 2203-000995 C606,C611,C615,C701 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 Downloaded from www.Manualslib.com manuals search engine...
  • Page 14 2007-000148 R110,R117 R-CHIP 2007-000138 R120,R126,R127,R135 R-CHIP 2007-000171 R121,R125 R-CHIP 2007-007014 R122,R124,R128,R131 R-CHIP 2007-000170 R123 R-CHIP 2007-001303 R201,R208,R300,R308 R-CHIP 2007-000171 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 15 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-TVS 0406-001188 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 16 1405-001082 V400,V701,V702,V703 VARISTOR 1405-001082 V500 THERMISTOR 1404-001221 V704,V705 VARISTOR 1405-001082 ZD500 DIODE-ZENER 0403-001547 ZD600,ZD601 DIODE-TVS 0406-001208 ZD701,ZD702,ZD703 DIODE-TVS 0406-001203 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • 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 without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • 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 Downloaded from www.Manualslib.com manuals search engine...

  • 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 Downloaded from www.Manualslib.com manuals search engine...
  • 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 Downloaded from www.Manualslib.com manuals search engine...

  • Page 21: Flow Chart Of Troubleshooting

    Check for the clock at C303 Check the clock generation circuit (related to U100) = 26MHz Check the initial operation 7-36 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 22 Flow Chart of Troubleshooting SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 23 Flow Chart of Troubleshooting SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 24 Check the circuit related to reset Check U405 pin 4 : 32MHz Is U200 R203, R204 Check the U200 Check the 16bit data signal SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 25 Flow Chart of Troubleshooting SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • Page 26: Charging Part

    Check the circuit related to U503 pin 3 = "L"? AUX_ON signal Check the U503 pin 10 Resolder or replace U503 ≒ 4.2V SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 27 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 without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • Page 28: Sim Part

    After Power ON, Check SIMCLK Signal on Check the Clock pin3 of SIM400 in a few Check the SIM Card SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 29 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 without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • Page 30: Microphone Part

    Check CN601, PIN 8 Check the JACK_EN signal = ' H' ? Check the MIC Replace the MIC 7-10 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 31 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 without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 32 Resolder CN700 PIN 37, 38 Check LCD Module Replace LCD Module Check speaker Replace SPK SPK+, SPK- = Operate 7-12 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 33 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 without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 34 Flow Chart of Troubleshooting 7-14 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • Page 35: Key Data Input

    When one of the keys is pushed, Resolder V701,V702, 703, 704, 705 & ZD701, ZD702, ZD703 KEY_ROW(0,4), KEY_COL(0,4) signal is OK? 7-15 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • 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 without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 37 Flow Chart of Troubleshooting 7-17 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • Page 38: Receiver Part

    Check LCD connector Resolder CN700 CN700 pin 37, 38 LCD MODULE Change the LCD Module SPK +,- PAD = 1.5V? 7-18 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 39 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 without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 40 Flow Chart of Troubleshooting 7-20 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 41 Connector Check the IC8 & the related circuit IC8 PIN 2 ≥ Vbat ? Replace the LCD Module 7-21 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 42 Flow Chart of Troubleshooting 7-22 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • Page 43: Key Back Light

    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 without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • Page 44: Camera Part

    CN 704 Pin 1, 20 = 2.8V? Replace the Camera Module Check the camera module Change the PBA 7-24 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 45 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 without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 46 Flow Chart of Troubleshooting 7-26 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 47 Flow Chart of Troubleshooting 7-13. BLUETOOTH BLUETOOTH does not work Check the U200 R126 = 'H' Replace U703 Replace ANT102 7-27 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • Page 48: Gsm Receiver

    J2,A6,B6,A9,E9 U100, R117 >= 1V >=2.7V RF26MHz, RF PSU Part Resolder U100 C142, C146 >= 1V Check U200 7-28 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • Page 49: Gsm Transmitter

    Check & Resolder U100 H7,H8,J7,J8 J2,A6,B6,A9,E9 U100, R117 >= 1V >=2.7V RF26MHz, RF PSU Part Resolder U100 Check U200 7-29 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • Page 50: Dcs Receiver

    J2,A6,B6,A9,E9 U100, R117 >= 1V >=2.7V RF26MHz, RF PSU Part Resolder U100 C142, C146 >= 1V Check U200 7-30 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • Page 51: Dcs Transmitter

    Check & Resolder U100 H7,H8,J7,J8 J2,A6,B6,A9,E9 U100, R117 >= 1V >=2.7V RF26MHz, RF PSU Part Resolder U100 Check U200 7-31 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • Page 52: Pcs Receiver

    J2,A6,B6,A9,E9 U100, R117 >= 1V >=2.7V RF26MHz, RF PSU Part Resolder U100 C142, C146 >= 1V Check U200 7-32 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

  • Page 53: Pcs Transmitter

    Check & Resolder J2,A6,B6,A9,E9 >= 1V U100, C147, R117 >=2.7V RF26MHz, RF PSU Part Resolder U100 Check U200 7-33 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 54 Flow Chart of Troubleshooting 7-34 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 55 Flow Chart of Troubleshooting 7-35 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...
  • Page 56 Flow Chart of Troubleshooting 7-36 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization Downloaded from www.Manualslib.com manuals search engine...

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