Samsung SGH-E420 Service Manual
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Samsung SGH-E420 Service Manual

Samsung SGH-E420 Service Manual

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GSM TELEPHONE
GSM TELEPHONE
SGH-E420
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  • Page 1: Table Of Contents

    GSM TELEPHONE SGH-E420 GSM TELEPHONE CONTENTS Safety Precautions Specification Product Function Array course control Exploded View/Disassembly and Assembly Instructions MAIN Electrical Parts List Block Diagrams PCB Diagrams Flow Chart of Troubleshooting 10. Reference data...
  • Page 2 C O N T E N T S 1. Safety Precautions 1-1. Repair Precaution......................1-1 1-2. ESD(Electrostatically Sensitive Devices) Precaution..........1-2 2. Specification 2-1. GSM General Specification..................2-1 2-2. GSM Tx Power Class....................2-2 3. Product Function 4. Array course control 4-1. Software Adjustments....................4-1 4-2.
  • Page 3 C O N T E N T S 9. Flow Chart of Troubleshooting 9-1. Pown on........................9-1 9-2. Initial...........................9-3 9-3. Charging Part......................9-6 9-4. SIM Part........................9-8 9-5. Microphone Part.......................9-10 9-6. Speaker Part......................9-12 9-7. Key Data Input......................9-14 9-8. Receiver Part......................9-15 9-9. LCD Part........................9-16 9-10.

  • Page 4: 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 5: Esd(Electrostatically Sensitive Devices) Precaution

    ● 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 6: Specification

    2. Specification 2-1. GSM General Specification GSM900 E GS M 9 0 0 DCS1800 PCS1900 Phase 1 Phase 2 Phase 1 Fr eq. 890~915 880~915 1710~1785 1850~1910 Band[MHz] 935~960 925~960 1805~1880 1930~1990 Uplin k/Down link 0~124 & ARF CN ra nge 1~124 512~885 512~810...

  • Page 7: Gsm Tx Power Class

    Speclflcation 2-2. GSM Tx Power Class TX Power TX Power TX Power GSM900 DCS1800 PCS1800 control level control level control level 33±2 dBm 30±3 dBm 30±3 dBm 31±2 dBm 28±3 dBm 28±3 dBm 29±2 dBm 26±3 dBm 26±3 dBm 27±2 dBm 24±3 dBm 24±3 dBm 25±2 dBm...

  • Page 8: Product Function

    65536 Color OLED Sub Screen (96×96) -SMS/EMS/MMS Message Service -WAP Http support -J2ME JAVA (MIDP 2.0/CLDC 1.1) -Speaker phone -40 Poly Melody -vCard, vCalendar -E-mail Client -Tri-band(900/1800/1900MHz) SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 9 Product Function SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 10: Array Course Control

    4. Array course control 4-1. Software Adjustments Test Cable (SGH-E420 VER2) Test Cable (SGH-E420 VER2) Test Jig (GH80-01909A) Test Jig (GH80-01909A) Serial Cable(CSA LL64151-A) Power Supply Cable SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 11: Software Downloading

    - if the binary file wanted, check only 'BIN' - if the tfs file wanted, check only 'TFS' - if all the files wanted, check 'BIN+TFS' 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 file(s) what you want to download SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 13 Array course control SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 14: Exploded View/Disassembly And Assembly Instructions

    QME01 QCA02 QLB01 QMP01 QMI01 QVK01 QAN05 QCA01 QCR12 QAN02 QMO01 QLC01 QSP01 QCK01 QMI03 QHI01 QRE01 QVO01 QFL01 QCR05 QRF01 QBA01 QCR26 QSC01 QBA00 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 15: Cellular Phone Parts List

    ASSY MEC-HINGE(CAN TYPE) GH75-04662A 　 QLC01 LCD-M/S SGH-E420 GH07-01014A 　 QMW01 AS-LCD WINDOW SVC GH81-06126A 　 QRE01 ASSY CASE-REAR GH98-01845A 　 QMI03 RMO-RUBBER MIC GH73-08187A SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 16: Sec Code

    MPR-VINYL BOHO MAIN GH74-29305A MPR-VINYL BOHO REAR BATT GH74-29981A AS-MAIN LCD SVC GH81-05969A AS-SUB LCD SVC GH81-05970A AS-LCD PCB SVC GH81-05971A AS-WINDOW TAPE SVC GH81-06097A SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 17: Disassembly & Assembly Instructions

    2) Be careful not to be torn the dust prevention tape. separated from the front , Be careful not to damage! 3) Be careful not to damage LCD FPCB! SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 18 EL sheet connector. 1) Be careful not to damage camera FPCB and EL sheet 1) Be careful not to damage camera FPCB and EL sheet FPCB. FPCB. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 19 2) Be careful not to damage the LCD FPCB when 주의한다. disassemble 1) Disassemble the UPPER and the LCD braket 1) Be careful not to make scratch and molding damage! SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 20 1) When attaching the TAPE, be careful not to the FPCB. damage camera FPCB at pincette. 2) When attaching an insulation TAPE, be careful not to cover the LCD. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 21 1) Be careful not to insert keypad into FRONT 2) When attaching the dust prevention TAPE, be careful incorrectly! not to cover the keypad groove. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 22 "tightly", it contracts with thumb. 1)Screw up the REAR at 4 Points. 1) Be careful not to make scratch and molding damage! SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 23 Exploded View/Disassembly&Assembly Instructions 5-10 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 24: Main Electrical Parts List

    2203-000812 C210 C-CER,CHIP 2203-001385 C212 C-CER,CHIP 2203-000233 C213 C-CER,CHIP 2203-000233 C219 INDUCTOR-SMD 2703-002208 C300 C-CER,CHIP 2203-005061 C301 C-CER,CHIP 2203-005061 C302 C-CER,CHIP 2203-005061 C303 C-CER,CHIP 2203-005061 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 25 2203-006824 C520 C-TA,CHIP 2404-001225 C521 C-TA,CHIP 2404-001225 C522 C-CER,CHIP 2203-005482 C523 C-CER,CHIP 2203-005482 C524 C-CER,CHIP 2203-005482 C525 C-CER,CHIP 2203-006208 C526 C-CER,CHIP 2203-005061 C527 C-CER,CHIP 2203-002443 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 26 2203-005482 C719 C-CER,CHIP 2203-000812 C720 C-CER,CHIP 2203-000812 C800 C-CER,CHIP 2203-000854 C801 C-CER,CHIP 2203-006562 C802 C-CER,CHIP 2203-000233 C803 C-CER,CHIP 2203-000679 C804 C-CER,CHIP 2203-005482 C805 C-CER,CHIP 2203-005482 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 27 L603 BEAD-SMD 3301-001438 LED1 0601-002268 LED2 0601-002268 MODULE200 DUPLEXER-FEM 2911-000044 OSC100 OSCILLATOR-VCO 2806-001329 OSC101 OSCILLATOR-VCTCXO 2809-001307 Q800 FET-SILICON 0505-002088 R100 R-CHIP 2007-007148 R101 R-CHIP 2007-000141 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 28 2007-000162 R408 R-CHIP 2007-000162 R409 R-CHIP 2007-000171 R410 R-CHIP 2007-000171 R411 R-CHIP 2007-000171 R412 R-CHIP 2007-000171 R413 R-CHIP 2007-007141 R500 R-CHIP 2007-000148 R501 R-CHIP 2007-007573 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 29 2007-000171 R800 R-CHIP 2007-000138 R801 R-CHIP 2007-000138 R802 R-CHIP 2007-000138 R803 R-CHIP 2007-000171 R804 R-CHIP 2007-000171 R805 R-CHIP 2007-000162 R806 R-CHIP 2007-001303 R807 R-CHIP 2007-007013 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 30 0406-001235 V707 DIODE-TVS 0406-001235 V708 VARISTOR 1405-001082 X500 CRYSTAL-SMD 2801-004373 ZD600 DIODE-TVS 0406-001231 ZD601 DIODE-TVS 0406-001231 ZD602 DIODE-TVS 0406-001197 ZD603 DIODE-ZENER 0403-001547 ZD604 DIODE-TVS 0406-001201 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 31 Main Electrical Parts List SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 32: Block Diagrams

    7. Block Diagrams SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 33 Block Diagrams SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 34: Pcb Diagrams

    8. PCB Diagrams SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 35 PCB Diagrams Bottom SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 36: Flow Chart Of Troubleshooting

    Check the VDD2,VDD3 circuit = 2.85V? Check the clock generation circuit Check for the clock at C121 = 13MHz (related to U100) Check the initial operation SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 37 Flow Chart of Troubleshooting Power On SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 38: Initial

    Check the circuit related to reset Is U400 Pin Check the U400 (memory CE) OK? Check the circuit around LCD & U400 (Short or not solder) SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 39 Flow Chart of Troubleshooting Initial 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: Charging Part

    Resolder or replace U505 Check the circuit related to U505 pin 4 = "L"? CHG_ON signal Check the U505 pin8 Resolder or replace U505 ≒ 4.2V SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 42 Flow Chart of Troubleshooting Charging SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 43: Sim Part

    Check SIMCLK Signal on CN500 Check the 32k OSC pin3 in a few second After SIM card insert, Replace PBA CN500 pin 2 = "H(SIM_RST)"? Check the SIM Card SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 44 Flow Chart of Troubleshooting SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 45: Microphone Part

    Check the circuit Resolder the R605, R606, R609, R610, L602, from U300 to MIC L603, C606 and C610 Check the MIC Replace the MIC 9-10 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 46 Flow Chart of Troubleshooting Microphone 9-11 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 47: Speaker Part

    U800 ≒ 1.8V? Resolder U800 (When U800 operate) is Speaker Contact in Check the speaker Contact proper position? Is Speaker working? Change the Speaker 9-12 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 48 Flow Chart of Troubleshooting Speaker 9-13 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 49: Key Data Input

    Check the Dome sheet & Key rubber pushed, is it displayed on LCD? When one of the keys is Replace the PBA pushed, KBIO signal is OK? 9-14 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 50: Receiver Part

    U600 pin11 = L during Ceck U600 call established? Resolder or replace U600 U600 pin 4, 16 = 1.5? Is Receiver working? Replace the Receiver 9-15 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 51: Lcd Part

    Resolder LCD module SOC700 pin 29, 30 = 2.8V? Check the U401 F703 pin 3, 4, 5, 6 is OK? Replace the LCD Module 9-16 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 52 Flow Chart of Troubleshooting 9-17 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 53: Key Back Light

    Flow Chart of Troubleshooting 9-10. Key Back Light Key Backlight does not work Check the PMU related to "VDD_KEY" C530 = "H"? 9-18 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 54: Camera Part

    Camera function does not work Check the Camera Reconnect the camera module connector on PCB Resolder U401 HDC700 C718 =2.8V? Check U801(pin2, pin4) related to 26MHz and R812 9-19 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 55 Flow Chart of Troubleshooting 9-20 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 56: Gsm Receiver

    Check & Resolder pin10,22,28 >=2.7V >= 1V RF PMU Part pin20 >=4.0V Check &Resolder U100, RF26MHz part, R100, R101 R110,R113,R114, R115 >= 1V Check U300 9-21 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 57: Gsm Transmitter

    U100 Pin6, 7, 8, 9 Check & Resolder pin4 >= 4.0V >= 500mV RF PSU part pin22, 28 >= 2.7V Resolder U100 or check Txcpo(R112) Check U300 9-22 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 58: Dcs Receiver

    >= 2.7V >= 1V RF PSU Part pin4 >= 4.0V Check & Resolder U100, RF26MHz part R100, R101 R110,R113,R114, R115 >= 1V Check U300 9-23 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 59: Dcs Transmitter

    U100 Pin6, 7, 8, 9 Check & Resolder pin4 >= 4.0V >= 500mV RF PSU part pin22, 28 >= 2.7V Resolder U100 or check Txcpo(R112) Check U300 9-24 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 60: Pcs Receiver

    >= 1V pin22, 28 >= 2.7V RF PSU part Check & Resolder U100, RF 26MHz part, R100, R101 R110,R113,R114, R115 >= 1V Check U300 9-25 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 61: Pcs Transmitter

    U100 Pin6, 7, 8, 9 Check & Resolder pin4 >= 4.0V >= 500mV RF PSU part pin22, 28 >= 2.7V Resolder U100 or check Txcpo(R112) Check U300 9-26 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 62 Flow Chart of Troubleshooting 9-27 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 63 Flow Chart of Troubleshooting 9-28 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 64 Flow Chart of Troubleshooting 9-29 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 65 Flow Chart of Troubleshooting 9-30 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 66: 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 67 Reference data 10-2 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 68 ⓒ 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. 2006. 12 Rev.1.0...

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