Samsung SGH-T108 Service Manual
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Samsung SGH-T108 Service Manual

Samsung SGH-T108 Service Manual

Dual band mobile cellular phone
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Download this manual See also: Owner's Manual
ELECTRONICS
SERVICE
DUAL BAND MOBILE CELLULAR PHONE
DUAL BAND Mobile
Cellular Phone
SGH-T108
Manual
CONTENTS
1. Exploded Views and Parts List
2. PCB Diagrams
3. Electrical Parts List
4. Block Diagrams
5. Flow Chart of Troubleshooting and
Circuit Diagram

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Summary of Contents for Samsung SGH-T108

  • Page 1 DUAL BAND Mobile ELECTRONICS Cellular Phone SGH-T108 SERVICE Manual DUAL BAND MOBILE CELLULAR PHONE CONTENTS 1. Exploded Views and Parts List 2. PCB Diagrams 3. Electrical Parts List 4. Block Diagrams 5. Flow Chart of Troubleshooting and Circuit Diagram...
  • Page 2 ELECTRONICS Samsung Electronics Co.,Ltd. Printed in Korea 03/2002. Rev 1.0 GH68-02700A...

  • Page 3: Table Of Contents

    1. Exploded Views and Parts List Main Main Parts List Travel Adapter Travel Adapter Parts List Ciger Light Adapter Ciger Light Adapter Parts List Test Jig Wearable EAR Microphone Data Kit 1-10 Battery Charger 1-11 Downloading Cable 1-12 PCLink for GSM Ver1.0 2.
  • Page 4 1. SGH-T108 Exploded Views and Parts List 1-1 Main 11-1 11-2 11-3 Exploded Views and Parts List...

  • Page 5: Main Parts List

    1-2 Main Parts List Location Description SEC CODE Remark DUAL WINDOW LCD GH72-03659C FOLDER UPPER GH75-01772A GH96-00964A MOTOR 3101-001243 3001-001268 SPEAKER FOLDER LOWER GH75-01773A SCREW 6001-001285 SCREW CAP(LEFT) GH74-01466A GH74-01467A SCREW CAP(RIGHT) WINDOW LCD GH72-01239A FRONT COVER GH75-01776A KEY PAD GH75-01775A GH92-01273A MAIN PBA...
  • Page 6 SGH-T108 COLOR & CODE COLOR SILVER WHITE PEARL GOLD METALIC BLUE ITEM MEC-FOLDER DUMY GH75-01774A GH75-01774A GH75-01774B GH75-01774A MEC-FOLDER UPPER GH75-01772A GH75-01772B GH75-01772C GH75-01772D MEC-FOLDER LOWER GH75-01773D GH75-01773A GH75-01773B GH75-01773B MEC-FRONT COVER GH75-01776A GH75-01776B GH75-01776C GH75-01776D MEC-REAR COVER GH75-01777A GH75-01777B...

  • Page 7: Travel Adapter

    1-3 Travel Adapter 1-4 Travel Adapter Parts List TYPE SEC CODE REMARK GH44-00171A CHINA GH44-00184A EUROPE GH44-00171C UNITED KINGDOM Gh44-00171E TAIWAN Exploded Views and Parts List...

  • Page 8: Ciger Light Adapter

    1-5 Ciger Light Adapter 1-6 Ciger Light Adapter Parts List DESCRIPTION SEC CODE REMARK Ciger Light Adapter Code GH44-00170A BLACK Exploded Views and Parts List...

  • Page 9: Test Jig

    1-7 Test Jig TEST JIG GH80-10508A TEST JIG CABLE GH39-00079A RF JIG CABLE GH39-00140A Exploded Views and Parts List...
  • Page 10 DM CABLE GH39-00080A 1-7-1 Test Jig POWER SUPPLY 8922 or 8960 WIRELESS COMMVNCATIONS TEST SET RF JIG CABLE 232 CABLE TEST JIG CABLE Exploded Views and Parts List...

  • Page 11: Wearable Ear Microphone

    1-8 Wearable EAR Microphone Wearable EAR Microphone GH59-00394A 1-9 Data Kit DATA KIT GH39-00078A Exploded Views and Parts List...

  • Page 12: Battery Charger

    1-10 Battery Charger BATTERY CHARGER GH44-00279A 1-11 Downloading Cable DOWNLOADING CABLE GH39-00143A 1-12 PCLink for GSM Ver1.0 PCLINK FOR GSM VER1.0 GH46-00023A Exploded Views and Parts List...
  • Page 13 2. PCB Diagrams 2-1 Main Top C810 LED802 SOFT2 R809 RIGHT C811 ZD400 U801 ZD402 C800 R814 R808 F200 F201 C451 V404 C807 R119 C805 LEFT C128 V402 C305 C121 C310 C308 C306 R308 C307 R823 C311 C818 R305 SOFT1 C301 S_KEY C809...

  • Page 14: Main Bottom

    2-2 Main Bottom PCB Diagrams...

  • Page 15: Main Parts List Top

    3. Electrical Parts List 3-1 Main Parts List Top Reference SER CODE Part Description Vendor Part No. C121 2404-001105 “C-TA,CHIP;10UF/6.3V” TESVSPOJ475M8RTJ C128 2404-001105 “C-TA,CHIP;10UF/6.3V” TESVSPOJ475M8RTJ U107 1203-002127 IC;LTC1734ES6-4.2#TR LTC1734ES6-4.2#TR R122 2007-007107 “R-CHIP;100K,1%” RK73H1ETP1003F R119 2007-007590 “R-CHIP;82K,1%” MCR01MZSF8202 C123 2203-005061 “C-CERAMIC,CHIP;C104Z,100NF,16V” GRP155F51C104ZA01E R124 2007-008117...
  • Page 16 Reference SER CODE Part Description Vendor Part No. V402 1405-001082 IC;VC040205X150R VC040205X150R C310 2203-000679 “C-CERAMIC,CHIP;C270J,27PF,50V” GRP1555C1H270JZ01E C306 2203-000870 “C-CERAMIC,CHIP;C030C,3PF,50V” GRP1555C1H3R0CZ01E C315 2203-005061 “C-CERAMIC,CHIP;C104Z,100NF,16V” GRP155F51C104ZA01E R310 2007-000831 “R-CHIP;39K,5%” RC1005J393CS C312 2203-001405 “C-CERAMIC,CHIP;C223Z,22NF,25V” GRP155F51E223ZD01E C309 2203-005061 “C-CERAMIC,CHIP;C104Z,100NF,16V” GRP155F51C104ZA01E R313 2007-000775 “R-CHIP;33K,5%” ERJ2GEJ333X C313 2203-000654 “C-CERAMIC,CHIP;C271K,270PF,50V”...

  • Page 17: Main Parts List Bottom

    3-2 Main Parts List Bottom Reference SER CODE Part Description Vendor Part No. D100 0401-001033 TR-SMALL SIGNAL;MCL4154 MCL4154 D300 0407-000115 TR-SMALL SIGNAL;DAN202UT106 DAN202UT106 D101 0407-001007 TR-SMALL SIGNAL;UMN1 UMN1 Q302 0501-000162 TR-SMALL SIGNAL;2SA1576FRT106 2SA1576FRT106 Q500 0501-000225 TR-SMALL SIGNAL;2SC4617 2SC4617 Q802 0501-002011 TR-SMALL SIGNAL;2SD2114KT146V 2SD2114KT146V Q103...
  • Page 18 Reference SER CODE Part Description Vendor Part No. “R440,R502,R511,R513” 2007-000148 “R-CHIP;10K,5%” ERJ2GEJ103X “R714,R719,R720,R721” 2007-000148 “R-CHIP;10K,5%” ERJ2GEJ103X R123 2007-000148 “R-CHIP;10K,5%” ERJ2GEJ103X R423 2007-000152 “R-CHIP;20K,5%” ERJ2GEJ203X R711 2007-000153 “R-CHIP;22K,5%” RC1005J223CS R505 2007-000155 “R-CHIP;27K,5%” RC1005J273CS “R412,R426,R430” 2007-000157 “R-CHIP;47K,5%” ERJ2GEJ473X R109 2007-000159 “R-CHIP;56K,5%” ERJ2GEJ563X “R106,R112,R113,R114”...
  • Page 19 Reference SER CODE Part Description Vendor Part No. “R405,R406,R407,R411” 2007-007318 “R-CHIP;1K,1%” RK73H1ETP1001F “R111,R202,R318” 2007-007771 “R-CHIP;0,5%” ERJ2GEJ0R0E “R320,R418,R436,R827” 2007-007771 “R-CHIP;0,5%” ERJ2GEJ0R0E “R438,R827” 2007-007771 “R-CHIP;0,5%” ERJ2GEJ0R0E R443 2007-007981 “R-CHIP;180K,1%” ERJ2RKF1803X R442 2011-001345 R-CHIP;EXB28V103JX EXB28V103JX “C101,C406,C407,C408” 2203-000233 “C-CERAMIC,CHIP;C101J,100PF,50V” GRP1555C1H101JD01E “C409,C512,C513” 2203-000233 “C-CERAMIC,CHIP;C101J,100PF,50V” GRP1555C1H101JD01E C600 2203-000233 “C-CERAMIC,CHIP;C101J,100PF,50V”...
  • Page 20 Reference SER CODE Part Description Vendor Part No. “C448,C640,C641” 2203-000812 “C-CERAMIC,CHIP;C330J,33PF,50V” GRP1555C1H330JZ01E C462 2203-000870 “C-CERAMIC,CHIP;C030C,3PF,50V” GRP1555C1H3R0CZ01E “C504,C510,C816” 2203-000995 “C-CERAMIC,CHIP;C470J,47PF,50V” GRP1555C1H470JZ01E “C629,C630,C705,C706” 2203-000995 “C-CERAMIC,CHIP;C470J,47PF,50V” GRP1555C1H470JZ01E “C710,C712,C715,C717” 2203-000995 “C-CERAMIC,CHIP;C470J,47PF,50V” GRP1555C1H470JZ01E C718 2203-000995 “C-CERAMIC,CHIP;C470J,47PF,50V” GRP1555C1H470JZ01E C739 2203-001124 “C-CERAMIC,CHIP;C681K,680PF,50V” GRP155R71H681KD01E C709 2203-001239 “C-CERAMIC,CHIP;C820J,82PF,50V” GRP1555C1H820JD01E C312 2203-001405 “C-CERAMIC,CHIP;C223Z,22NF,25V”...
  • Page 21 Reference SER CODE Part Description Vendor Part No. L603 2703-002200 INDUCTOR-SMD;CIH05T18NJNC CIH05T18NJNC L209 2703-002206 INDUCTOR-SMD;CIH05T39NJNC CIH05T39NJNC L611 2703-002207 INDUCTOR-SMD;CIH05T3N3SNC CIH05T3N3SNC “L610,L706” 2703-002267 INDUCTOR-SMD;CIH05T4N7SNC CIH05T4N7SNC “L602,L607” 2703-002281 INDUCTOR-SMD;CIH05T5N6SNC CIH05T5N6SNC L720 2703-001750 INDUCTOR-SMD;LL1005-FH2N2S LL1005-FH2N2S X400 2801-004025 COMP-SMD;FC-255 FC-255 “F202,+B40” 2901-001116 COMP-SMD;NFM39R12C471T1 NFM39R12C471T1 F608 2901-001116 COMP-SMD;NFM39R12C471T1...

  • Page 22: Main Base Band

    4. Block Diagrams 4-1 Main Base Band Exploded Views and Parts List...

  • Page 23: Main Rf

    4-2 Main RF Electrical Parts List...

  • Page 24: Rf Transmit Part

    4-2-1 RF Transmit Part Exploded Views and Parts List...

  • Page 25: Rf Receive Part

    4-2-2 RF Receive Part Electrical Parts List...

  • Page 26: Power On

    5. Flow Chart of Troubleshooting and Circuit Diagram 5-1 Power ON 'POWER ON'does not work Check the Battery Voltage Charge the Battery is more than 3.4V? The node Check U100 and the path from +VBATT between D100 and BAT101 > 2.8 V ? to BAT101 When the "END"...
  • Page 27 Electrical Parts List...
  • Page 28 5-2 Initial Initial Failure Check and repair the important U302 pin 6 = "H" ? signals of U400 as follows The node between R401 and C404 Check U103 = "H" (RST) R409 = "H" Resolder R409 (SIMPWDN_BOOT) Check all the other connection by Test S/W R428 = "H"...
  • Page 29 Electrical Parts List...

  • Page 30: Charging Part

    5-3 Charging Part Abnormal charging part Check the CN4-1 pin 17,18 > 5 V ? Replace TA Check the U107 pin 3 > 5 V ? Resolder C128 U107 pin 4 = "L" ? Resolder R124 Resolder components Check the U107 pin 5 °÷ 4.2V ? around U107 Exploded Views and Parts List...
  • Page 31 Electrical Parts List...

  • Page 32: Sim Part

    5-4 Sim Part Phone can't access SIM card U106 pin 6 = 3 V ? Resolder R123 U106 pin 5 = "H" ? Replace the PBA U106 pin 2, 3 = 3 V ? Replace U106 Resoldering CN102 CN102 pin 1, 5 = 3 V ? and check open connection from U106 to CN102 After Power ON,...
  • Page 33 Electrical Parts List...

  • Page 34: Microphone Part

    5-5 Microphone Part Microphone does not work Check Resolder MIC and the connection ZD400, ZD402 from MIC Check the circuit Resolder the R424, R425, R431, related to U400 R434, C435, C438 and C443 Check the MIC Replace the MIC Exploded Views and Parts List...
  • Page 35 5-10 Electrical Parts List...

  • Page 36: Speaker Part

    5-6 Speaker Part Speaker does not work U300 pin 4, 6 = 3 V ? Ckeck U101 and related circuit U300 pin 5 = "H" ? Replace the PBA Check the clock generation circuit Check for the clock signal at R304 (related to U500 and Q500) U303 pin 17, 18 = 1.8 V ? Resolder U303...

  • Page 37: Electrical Parts List

    25 24 23 22 21 20 SPVSS SPVDD R310 39K SDIN SYNC C312 22NF R312 SCLK HPOUT-R SDOUT HPOUT-L/MONO 5-12 Electrical Parts List...

  • Page 38: Key Data Input

    5-7 Key Data Input Check Initial operation Replace the PBA KEYBOARD_ROW(0:4) is "Low" ? When one of the keys is pushed, Replace the PBA one of KEYBOARD_ROW(0:4) is "High" ? 5-13 Exploded Views and Parts List...

  • Page 39: Receiver Part

    5-8 Receiver Part Receiver does not work CN401 pin 2, 3 = short Resoler CN401 CN401 pin 2, 3, 6 = 1.5 V ? Replace the PBA CN201 pin 7, 17 = 1.5 V ? Resolder CN201 Check the depression of Modify the REC pins the REC pins Is Receiver working?
  • Page 40 5-15 Exploded Views and Parts List...

  • Page 41: Ring Indicator

    5-9 Ring Indicator Ring Indicator LED does not work U102 pin 2, 3 > 3.4 V ? Check the circuit related to U102 Is Green color LED of 3LEDs Check Q803, R810, LED802 correctly work ? Is Red color LED of 3LEDs Check Q804, R813, LED802 correctly work ? Is Blue color LED of 3LEDs...
  • Page 42 RTC_3V3 LED802 LED801 R809 Q801 RI_BLUE R810 RI_GREEN Q803 R813 RI_RED Q804 5-17 Exploded Views and Parts List...

  • Page 43: Back Light (For Color Main Lcd)

    5-10 Back Light (for Color Main LCD) Backlight does not work LCD Contrast high level Select LCD Contrast high level in the menu ? U801 pin 2 = "H" ? U201 pin 4 = "H" ? Check for the pluse signal Check the circuit Replace the PBA Resolder U801...

  • Page 44: Back Light (For Sub Lcd & Key)

    5-11 Back Light (for sub LCD & Key) Backlight does not work Backlight "ON" mode Select backlight "ON" mode in the menu? R811 = "H" ? GPO1 by test S/W LCD BACKLIGHT KEY PCB LED Check the Check the CN201 pin 21 = "H" ? CN201 pin 21 LCD backlight on ? Replace EL sheet...

  • Page 45: Gsm Receiver

    5-12 GSM Receiver Rx On RF input : CH center freq. + 67.7 kHz Amp. : -50 dBm U706 Check RF connector Pin 8 -> resolder °√ -65 dBm U706 Resolder & Check U706 Pin 10 VC1 : L Pin 10 °√...

  • Page 46: Gsm Transmit

    5-13 GSM Transmit Tx On (level : 5) U706 Resolder Pin 8 U708 °√ 30 dBm U706 Check Change or Resolder VC1 : H Pin 5 U706 °√ 30 dBm VC2 : L Check Ant. S/W, Control Circuit U707 Resolder Pin 4 U700, L707 °√...

  • Page 47: Dcs Receiver

    5-14 DCS Receiver Rx On RF input : CH center freq. + 67.7 kHz Amp. : -50 dBm U706 Check RF connector Pin 8 -> resolder °√ -65 dBm U706 Resolder & Check U706 Pin 1 VC1 : L Pin 10 °√...

  • Page 48: Dcs Transmit

    5-15 DCS Transmit Tx On (level : 0) U706 Resolder Pin 8 U708 °√ 25 dBm U706 Check Change or Resolder VC1 : H Pin 3 U706 °√ 25 dBm VC2 : L Check Ant. S/W, Control Circuit U707 Resolder Pin 5 U702, L706 °√...
  • Page 49 GNDR GNDR SDAT RFOUT SCLK VDDR SENB AUXOUT VDDI PWDNB IFOUT GNDI 5-24 Electrical Parts List...
  • Page 50 GND2 GND1 MIX2OUTB GNDIFLO MIX2OUT IOUT VCCIF IOUTB GNDIF QOUT RFLOIN QOUTB VCCRELO GNDIQ MIX1OUT VCCIQ MIX1OUTB RESET VCCMIX GNDMIX IINB MIX1GSMIN C617 MIX1GSMINB QINB ICURAD C616 PLLOUT C618 5-25 Exploded Views and Parts List...
  • Page 51 G8 16 VDD2 G6 14 G4 12 VDD1 VCTL 7 VAPC1 RFIN1 IN1- GND2 VCC1 VCC2 5-26 Electrical Parts List...

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