Samsung SGH-N620E Service Manual
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Samsung SGH-N620E Service Manual

Samsung SGH-N620E Service Manual

Gsm telephone
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SERVICE
GSM TELEPHONE
GSM TELEPHONE
SGH-N620E
Manual
1.
2.
3.
Exploded Views and Parts List
4.
5.
6.
7.
CONTENTS

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Summary of Contents for Samsung SGH-N620E

  • Page 1: Table Of Contents

    GSM TELEPHONE SGH-N620E Manual SERVICE GSM TELEPHONE CONTENTS Specification Circuit Description Exploded Views and Parts List Electrical Parts List Block Diagrams PCB Diagrams Flow Chart of Troubleshooting...
  • Page 2 ELECTRONICS ⓒ Samsung Electronics Co.,Ltd. February. 2003 Printed in Korea. Code No.: GH68-04684A BASIC.

  • Page 3: Specification

    - 1 0 0 d B m TDM A M u x C el l Ra d iu s 3 5 K m 3 5 Km 2 K m SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 4: Gsm Tx Power Class

    6 ± 4 dBm 9 ± 3dBm 7 ± 3 dBm 4 ± 4 dBm 5 ± 3 dBm 2 ± 5 dBm 0 ± 5 dBm SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 5: Circuit Description

    6.5dBm and fed into Power Amplifier(U303). The PA output power and power ramping are well controlled by Auto Power Control circuit. We use offset PLL below SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 6 IC stop charging process. 7. Audio SPK2P and SPK2N from VP40578 are connected to the main receiver. MIC2P and MIC2N are connected to the main SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 7 This system uses the 13MHz , VC-TCXO. Toyocom. AFC control signal form VP40578 controls frequency from 13MHz x-tal. It generates the clock frequency. This clock is connected to VP40578, YMU762. SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 8 3. SGH-N620E Exploded View and its Parts list 1. Cellular phone Exploded View SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 9 3001-001254 MOTOR GH31-00033A BUSHING ANT GH71-00588A ANTENNA GH42-00137A->E BATTERY-ASS'Y GH43-00435A MOBILE CAP GH73-00892A SCREW CAP GH73-00891A SCREW M1.7X5 6001-001346 MIC-RUBBER GH73-02596A FRONT TOTAL ASS'Y GH97-03134A SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 10 3. Test Jig (GH80-10508A) 3-1. RF Test Cable 3-2. Test Cable 3-3. Serial Cable (GH39-00174A) (GH39-00079A) 3-4. Power Supply Cable 3-5. DATA CABLE 3-6. TA (GH39-00078A) (GH44-00184G) SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 11 R144 1109-001204 U201 2007-000143 R147 1201-001954 U103 2007-000148 R135 1202-001036 U210 2007-000148 R201 1203-002077 U101 2007-000148 R203 1203-002187 U209 2007-000148 R222 1203-002598 U104 2007-000148 R223 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 12: Electrical Parts List

    R231 2007-000162 R227 2007-002796 R235 2007-000162 R228 2007-002796 R236 2007-000162 R233 2007-007008 R307 2007-000162 R241 2007-007008 R308 2007-000162 R242 2007-007095 R145 2007-000168 R234 2007-007095 R303 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 13 C230 2203-000254 C106 2203-000679 C332 2203-000254 C107 2203-000679 C336 2203-000254 C134 2203-000679 C337 2203-000254 C136 2203-000679 U601 2203-000254 C212 2203-000812 C213 2203-000254 C241 2203-000812 C236 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 14 C131 2203-003054 C204 2203-005503 C213 2203-003054 C248 2203-005503 C211 2203-005050 C310 2203-005664 C117 2203-005050 C312 2203-005664 C130 2203-005061 C104 2203-005664 C133 2203-005061 C118 2203-005840 C113 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 15 L310 2703-002205 L309 2703-002484 L303 2703-002485 L306 OSC201 2801-003747 2809-001264 OSC301 2901-001116 F101 2901-001254 L120 2904-001417 F302 2904-001470 F301 2909-001197 U301 3301-001362 L101 3404-001152 SW101 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 16: Block Diagrams

    CHARGING CURRENT RF INTERFACE SYSTEM CLOCK (13MHz) XVCC SRAM 3VRF Li-ion BATT FLASH (STANDARD) VDD3.0 AVCC2.5 EEPROM CHARGING RTC_CLOCK CIRCUIT LVCC (32.768KHz) KEYPAD RTC_VCC LED3V3 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 17 U301 CN301 ANTTENA Si4133T-BM (U305) CONNECTOR OSC301 VCTCXO DCS TX 1710 ~ 1785 MHz (CH698:1747.4MHz) Dual PAM (U303) GSM TX 880 ~ 915 MHz (CH62:902.4MH SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 18 (CH698:1747.4MHz) Dual PAM (U303) Si4200-F (U302) SDATA SCLK SENB PDNB ② Tx power +VBATT from U 205 TxPower ② 3VRF TXEN ① BAND SELECTION VREG SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 19 U301 1849.8 ~ 1919.8 MHz CN301 OSC301 <DCS> ANTTENA AFC ③ VCTCXO 1804.9 ~ 1879.9 MHz CONNECTOR Si4133T-BM (U305) -50dBm @947.067 MHz -50dBm @1842.467 MHz SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 20: Pcb Diagrams

    6. SGH-N620E PCB Diagrams 1. Main PCB Top Diagram SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 21 SGH-N620E PCB Diagrams 2. Main PCB Bottom Diagram SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 22: Flow Chart Of Troubleshooting

    U102 pin 3 ≠ 3.0V Check the clock generation circuit Check for the clock signal at R320 (related to OSC301 and Q304) Check the initial operation SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 23 SGH-N620E Flow Chart of Troubleshooting Power On SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 24 R234 = "H" (MSIZE) Resolder R234 Check the circuit around R233 = "L" Resolder R233 (EXTPROC) Check the circuit around Replace PBA U300(EEPROM) and data stored in it SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 25 SGH-N620E Flow Chart of Troubleshooting Initial U205 U300 U209 R217 CSROM SYSRST C212 MSIZE R221 GPIO3 BOOT SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 26: Charging Part

    Check the U106 pin 3 > 4.9V Resolder U106 R103 (CHG_OIN side) = "L" Resolder R103 Check Q014 pin 5 ≠ 4.2V Resolder components around U106 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 27 SGH-N620E Flow Chart of Troubleshooting Charging SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 28: Sim Part

    After SIM card insert, CN101 pin Replace PBA 2 = "H" (SIMRST)? Check the circuit around U208 (Serial EEPROM) and datad stored in it SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 29: Microphone Part

    Check the circuit RC Filer to R230, R231, R220, R236 MIC201 C219, C220, C221, C252 Replace the MIC or MIC Holder Check soldering of MIC Module SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 30 SGH-N620E Flow Chart of Troubleshooting Microphone SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 31: Receiver Part

    Receiver does not work Resolder CN200 CN200 pin 2,3 = short Replace the PBA CN200 pin 2,3,6 = 1.5V Replace the Receiver Is Receiver working? 7-10 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 32 Speaker does not work CN105 connected Connect CN105 and Speaker Speaker? Is Speaker working? Replace the Speaker U107 pin 7 = 3.0V Replace the U102 7-11 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 33 SGH-N620E Flow Chart of Troubleshooting HPOUT-L/MON O SDOUT HPOUT- R SCLK SYNC SDI N /W R SPVDD SPVSS C158 100NF 7-12 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 34: Key Data Input

    Check initial operation When one of the keys is Check the Dome sheet pushed, is it displayed on Replace the PBA Keypad is OK? 7-13 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 35: Key Backlight

    Resolder R136, R137, Q105 pin 3 = "L" or Resolder Q105 Resolder R126, R127, R129, R130, KEY PCB LED on? R131, R132, R133, R134 7-14 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 36: Ring Indicator

    SGH-N620E Flow Chart of Troubleshooting 10.Ring Indicator Ring indicator LED does not work Resolder U102 U102 pin 12 = "H" Replace 3 color LED Resolder 3 color LED 7-15 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 37: Gsm Receiver

    U304 pin 2,3,4,5 Check U304 pin Check U304 pin > 100mV 7, 20 OK? 14,16,17,18 > OK? Check Radio PSU, Resolder U205 Resolder U304 RF13MNz part 7-16 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 38: Gsm Transmitter

    I/O signal RF 13MHz, 8 ≠ 40mV -6dBm OK? RF PSU part Resolder U303 Check U302 pin9, 10, 12, 13 ≠ -6dBm OK? Resolder U302 7-17 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 39: Dcs Receiver

    Resolder U302 Check Check U304 U304 U304 Resolder pin 2,3,4,5 pin14.16,17, pin 7,20 U304 > 100mV 18 OK? Check Racio PSU RF13MHz part Resolder U205 7-18 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

  • Page 40: Dcs Transmitter

    U302 pin5, 6, 7, 8 pin9,10,12,13 >= Check & Resolder >= 40mV -6dBm I/O signal, RF 13MHz Resolder U301 Check U302 pin9,10,12,13 >= -6dBm Resolder U302 7-19 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...
  • Page 41 SGH-N620E Flow Chart of Troubleshooting Transmitter 7-20 SAMSUNG Proprietary-Contents may change without notice This Document can not be used without Samsung's authorization...

Table of Contents