Samsung SGH-X120 Service Manual
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Samsung SGH-X120 Service Manual

Samsung SGH-X120 Service Manual

Gsm telephone
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GSM TELEPHONE
GSM TELEPHONE
SGH-X120
1.
Specification
2.
Flow Chart of Troubleshooting
3.
Exploded Views and Parts Lis
4.
Electrical Parts List
5.
Block Diagram
6.
PCB Diagrams
CONTENTS

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Summary of Contents for Samsung SGH-X120

  • Page 1 GSM TELEPHONE SGH-X120 GSM TELEPHONE CONTENTS Specification Flow Chart of Troubleshooting Exploded Views and Parts Lis Electrical Parts List Block Diagram PCB Diagrams...

  • Page 2: Specification

    3 5 K m 35K m 2 K m SAM SU N G Pr opr i et ar y- C ont ent s m ay change w i t hout not i ce This Document can not be used without Samsung's authorization...

  • Page 3: Gsm Tx Power Class

    2 ± 5 dBm 0 ± 5 dBm SAM SU N G Pr opr i et ar y- C ont ent s m ay change w i t hout not i ce This Document can not be used without Samsung's authorization...

  • Page 4: Flow Chart Of Troubleshooting

    2. SGH-X120 Flow Chart of Troubleshooting 1. Power ON 'Power ON' Does not work Check the current consumption Current consumption Down load again ≥ 100mA ? Check the V bat. voltage Voltage ≥ 3.3V ? Charge the Battery Check the pin of U300 Check U300 and C313 pin #11 ≥...

  • Page 5: System Initial

    SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams 2. System Initial Initial Failure Check the U300 (If it has some problem, The pin #9 of U300 = 1.8V it has to be replaced.) and pin #11 of U300=2.8V? Check the U300...

  • Page 6: Sim Part

    SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams 3. SIM Part "Insert SIM" is displayed on the LCD Is there any signal Check the U201 pin #52,53,54 of U300 ? Is there any signal Check the U300 pin #1,2,3,6 of CN300 ?

  • Page 7: Charging Part

    SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams 4. Charging Part Abnormal charging operation The pin #17,18 of CN301 Replace TA or check CN301 (VEXT) is 5V ? Check the U302 The pin#6 OF U302 LOW? Check the U302 The pin#2 of U302 is Low?

  • Page 8: Microphone Part

    SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams 5. Microphone Part Micro-phone does not work Is the assembled status of Reassemble the microphone Microphone O.K? Check the DC bias voltage on Mic path. Solder the microphone again The voltage of C476 is or Replace 2.2V ±...

  • Page 9: Speaker Part

    SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams 6. Speaker Part There is no sound from speaker Is the terminal of speaker Replace the speaker is O.K? The type of sound from the speaker is Melody? Are there any signal...

  • Page 10: Egsm Receiver

    SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams 7. EGSM Receiver Continuous RX ON RF Input : 62 CH AMP : -50dBm NORMAL CONDITION Check soldered status of Catch the channel ? C102 CON101 U100 Check Resolder or Change Pin #6 ≥ -65dBm ?

  • Page 11: Egsm Transmitter

    SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams 8. EGSM Transmitter U100 Pin#6 U100 U200, Q202 About 2~3 dBm? Pin#10 = High? Check & Change Level of U102, CON101 Continuous TX ON condition U100 Pin#7 is Check & Change TX Power Code : 500 code Applied...

  • Page 12: Dcs Receiver

    SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams 9. DCS Receiver Continuous RX ON RF Input : 660 CH AMP : -50dBm NORMAL CONDITION Check soldered status of Catch the channel ? C102 U100 Check CON101 Pin #6 ≥ -65dBm ?

  • Page 13: Dcs Transmitter

    SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams 10. DCS Transmitter U100 Pin#6 U100 U200,Q203 About 2~3 dBm? Pin#4 = High? Check & Change C102, CON101 Level of Continuous TX ON condition Check & Change U100 Pin#5 is TX Power Code : 350 code Applied...
  • Page 14 SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams V C C D V B A T C N 400 V B AT N C 2 V _B O O ST V C C 1 G N D 2 V I C O N...
  • Page 15 SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams CN300 VBAT VCC_1. 8A VCCD VPAC VO SC VCCA VCCB VRTC 91 0 C300 C 325 C301 C302 C303 C304 VREF SI M RST UP_RST VLDO _7 53 UP_CLK SI M CLK...
  • Page 16 SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams C N 100 C O N 101 R 100 O UT 2 C 100 C 101 L105 VB AT VPAC R 101 D C S_PAM _I N C 102 R 102 R 103...
  • Page 17 SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams VCC_1. 8A VCC_1. 8A VCCD VRTC C200 C201 C202 C203 C205 C206 VCC_1. 8A C207 A( 22) VCC_1. 8A VCCD R201 VREF YM U_LE D CLK13M _TR A( 23) D( 0: 15)
  • Page 18 3. SGH-X120 Exploded View and its Parts list 1. Cellular phone Exploded View SAM SU N G Pr opr i et ar y- C ont ent s m ay change w i t hout not i ce This Document can not be used without Samsung's authorization...

  • Page 19: Cellular Phone Parts List

    GH43-01310A QSC21 EAR JACK COVER ASSY GH75-04431A SAM SU N G Pr opr i et ar y- C ont ent s m ay change w i t hout not i ce This Document can not be used without Samsung's authorization...
  • Page 20 3-5. DATA CABLE 3-6. TA (GH39-00159A) (GH44-00482A) SAM SU N G Pr opr i et ar y- C ont ent s m ay change w i t hout not i ce This Document can not be used without Samsung's authorization...
  • Page 21 C417 2203-000679 C208 2203-006201 C308 2203-005061 C418 SAM SU N G Pr opr i et ar y- C ont ent s m ay change w i t hout not i ce This Document can not be used without Samsung's authorization...
  • Page 22 R107 2203-000812 C460 0601-001823 LED200 2007-000171 R108 SAM SU N G Pr opr i et ar y- C ont ent s m ay change w i t hout not i ce This Document can not be used without Samsung's authorization...
  • Page 23 2007-001319 R440 2007-000140 R306 2007-007008 R346 3404-001152 SAM SU N G Pr opr i et ar y- C ont ent s m ay change w i t hout not i ce This Document can not be used without Samsung's authorization...

  • Page 24: Electrical Parts List

    ZD318 0406-001169 ZD319 1405-001082 ZD320 1405-001082 ZD321 SAM SU N G Pr opr i et ar y- C ont ent s m ay change w i t hout not i ce This Document can not be used without Samsung's authorization...

  • Page 25: Block Diagram

    Ear-Jack V_BAT 13MHz V_BAT Analog Switch MAX4684 SAM SU N G Pr opr i et ar y- C ont ent s m ay change w i t hout not i ce This Document can not be used without Samsung's authorization...

  • Page 26: Pcb Diagrams

    R 433 C425 C 446 C 445 R429 SAM SU N G Pr opr i et ar y- C ont ent s m ay change w i t hout not i ce This Document can not be used without Samsung's authorization...
  • Page 27 SGH-X120 PCB Diagrams 2. Main Bottom Diagram SAM SU N G Pr opr i et ar y- C ont ent s m ay change w i t hout not i ce This Document can not be used without Samsung's authorization...
  • Page 28 ⓒ Samsung Electronics Co.,Ltd. Oct. 2004 Printed in Korea. This Service Manual is a property of Samsung Electronics Co.,Ltd. Any unauthorized use of Manual can be punished under applicable Code No.: GH68-05516A International and/or domestic law. BASIC.

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