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Samsung SGH-T508 Service Manual

Dual band mobile cellular phone
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ELECTRONICS
SERVICE
DUAL BAND MOBILE CELLULAR PHONE
DUAL BAND Mobile
Cellular Phone
SGH-T508
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 Diagrams

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Summary of Contents for Samsung SGH-T508

  • Page 1 DUAL BAND Mobile Cellular Phone ELECTRONICS SGH-T508 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 Diagrams...
  • Page 2 ELECTRONICS Samsung Electronics Co.,Ltd. Printed in Korea 02/2003 Rev 1.0 GH68-03491A...

  • Page 3: Exploded Views And Parts List

    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 EAR Microphone Data Kit 1-10 Battery Charger 2. PCB Diagrams Main Top Main Bottom 3.
  • Page 4 1. SGH-T508 Exploded Views and Parts List 1-1 Main Exploded Views and Parts List...

  • Page 5: Main Parts List

    1-2 Main Parts List Location NO. Description SEC CODE Remark GH75-02664A FOLDER UPPER GH07-00278A 3001-001345 SPEAKER GH31-00048A MOTOR GH75-02193A FOLDER LOWER GH72-05017A WINDOW LCD 6001-001478 SCREW GH75-02194A FRONT COVER GH75-02196A KEYPAD GH92-01446A MAIN PBA GH59-00572A VOLKEY FPCB GH59-00571A DOME SHEET GH59-00610A GH73-01338A CONNECTOR COVER...

  • Page 6: 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 7: 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 8: Test Jig

    1-7 Test Jig TEST JIG GH80-10508A TEST JIG CABLE GH39-00079A RF CABLE GH39-00090A Exploded Views and Parts List...
  • Page 9 1-7-1 Test Jig POWER SUPPLY 8922 or 8960 WIRELESS COMMUNICATIONS TEST SET RF CABLE TEST JIG CABLE 232 CABLE Note PC Exploded Views and Parts List...

  • Page 10: Wearable Ear Microphone

    1-8 Wearable EAR Microphone Wearable EAR MICROPHONE GH59-00322A 1-9 Data Kit DATA KIT GH39-00078A 1-10 Battery Charger BATTERY CHAGER GH44-00234A Exploded Views and Parts List...
  • Page 11 2. PCB Diagrams 2-1 Main Top C603 C602 C601 D110 U106 R107 DIGIT3 DIGIT6 DIGIT9 U100 L605 U204 RIGHT L604 C122 U602 C123 C128 C608 C611 U603 R691 V304 U108 C213 V303 C209 DIGIT2 DIGIT5 DIGIT8 DIGIT10 R244 C303 C120 C214 V302 C305...
  • Page 12 2-2 Main Bottom C106 C160 R101 C302 V220 V301 U101 U600 Q100 L607 R111 C316 R103 C109 TH200 C630 C201 R205 Q201 U605 C604 C612 R110 C607 R311 C617 R413 U102 U104 U501 U500 C118 R690 ZD300 C114 C104 U205 L501 L500 C105...

  • Page 13: Main Parts List Top

    3. Electrical Parts List 3-1 Main Parts List Top LEVEL SEC CODE REFERENCE LEVEL SEC CODE REFERENCE 0601-001611 LED200 2007-007137 R317 0601-001611 LED201 2007-007309 R691 0601-001611 LED202 2007-007313 R318 0601-001611 LED203 2007-007771 R312 0601-001611 LED204 2007-007771 R316 0601-001611 LED205 2007-000162 R419 0601-001611 LED206...

  • Page 14: Electrical Parts List

    LEVEL SEC CODE REFERENCE 2203-005061 C313 2203-005483 C311 2203-000438 C608 2203-000679 C611 2203-000679 C613 2203-000679 C615 2203-000812 C601 2203-002443 C203 2203-005061 C202 2404-001086 C312 2203-000233 C602 2404-001105 C603 2203-000679 C303 2203-000679 C304 2203-005061 C305 2203-000254 C103 2203-000254 C120 2203-005061 C102 2203-005061 C123 2203-005061...

  • Page 15: Main Parts List Bottom

    3-2 Main Parts List Bottom LEVEL SEC CODE REFERENCE LEVEL SEC CODE REFERENCE 2007-007313 R318 0601-001611 LED200 2007-007771 R312 0601-001611 LED201 0601-001611 LED202 2007-007771 R316 2007-000162 R419 0601-001611 LED203 2007-007009 R211 0601-001611 LED204 0601-001611 LED205 2007-007009 R212 2007-001290 R241 0601-001611 LED206 2007-001290 R241...
  • Page 16 LEVEL SEC CODE REFERENCE 2203-000679 C613 2203-000679 C615 2203-000812 C601 2203-002443 C203 2203-005061 C202 2404-001086 C312 2203-000233 C602 2404-001105 C603 2203-000679 C303 2203-000679 C304 2203-005061 C305 2203-000254 C103 2203-000254 C120 2203-005061 C102 2203-005061 C123 2203-005061 C128 2404-001105 C122 2007-007771 L604 2007-007771 L605 3301-001362...

  • Page 17: Block Diagrams

    4. Block Diagrams 4-1 Main Baseband Block Diagrams...

  • Page 18: Main Rf

    4-2 Main RF Block Diagrams...

  • Page 19: Rf Transmit Part

    4-2-1 RF Transmit Part Block Diagrams...

  • Page 20: Rf Receive Part

    4-2-2 RF Receive Part Block Diagrams...

  • Page 21: Flow Chart Of Troubleshooting And

    5. Flow Chart of Troubleshooting and Circuit Diagrams 5-1 Power ON ’POWER ON’does not work Check the Battery Voltage Charge the Battery is more than 3.2V When the "END" key is pressed, the voltage of "D110 pin1" Check the Dome sheet 3.6V? U102 U108...
  • Page 22 Flow Chart of Troubleshooting and Circuit Diagrams...
  • Page 23 5-2 Initial Initial Failure After power on, Downloading SW is OK ? check and repair the important (Is CSROM signal OK ?) signals of U400 as follows The node Check the circuit between R408 and C408 related to reset = "H" (RST) R412 = "H"...
  • Page 24 Flow Chart of Troubleshooting and Circuit Diagrams...

  • Page 25: Charging Part

    5-3 Charging Part Abnormal charging part Check the CN301 pin 17,18 > 4.9 V ? Replace TA Check the U103 pin 3 > 4.9 V ? Resolder U103, U915 R103(CHG_ON side) = "L" ? Resolder R103 Resolder components around Check the U106 pin 5 4.2V ? U103 Flow Chart of Troubleshooting and Circuit Diagrams...
  • Page 26 Flow Chart of Troubleshooting and Circuit Diagrams...

  • Page 27: Sim Part

    5-4 Sim Part Phone can’t access SIM card U101 pin4 = 3.0 V ? Check the circuit around U104 Replace U101 or U101 pin5 = "H" ? Replace PBA U101 pin 2, 3 = 3.0 V ? Replace U101 After Power ON, Resoldering C109 or Check SIMCLK Signal on CN100 pin 3 Replace PBA...
  • Page 28 Flow Chart of Troubleshooting and Circuit Diagrams...

  • Page 29: Microphone Part

    5-5 Microphone Part Microphone does not work EAR400 pin 4, 5 = short? Resolder EAR400 U102 pin 5 (AVCC) 2.5V? Check the circuit related to U102 Resolder the Check the circuit R422,R423,R423,R429, RC Filter to MIC1 C415,C417,C416,C420 Check the tension of MIC Module Replace the Mic or Mic Holder Flow Chart of Troubleshooting and Circuit Diagrams...
  • Page 30 Flow Chart of Troubleshooting and Circuit Diagrams 5-10...

  • Page 31: Receiver Part

    5-6 Receiver Part Speaker does not work EAR400 pin 2, 3 = short Resolder EAR400 EAR400 pin 2, 3, 6 = 1.25 V ? Replace the PBA U205 pin 7, 8 Resolder U205, R237, R236 5-11 Flow Chart of Troubleshooting and Circuit Diagrams...
  • Page 32 Flow Chart of Troubleshooting and Circuit Diagrams 5-12...

  • Page 33: Key Data Input

    5-7 Key Data Input Check Initial operation When one of the keys is pushed, Check the Dome sheet is it displayed on LCD Keypad is OK ? Replace the PBA 5-13 Flow Chart of Troubleshooting and Circuit Diagrams...

  • Page 34: Ring Indicator

    5-8 Ring Indicator Ring Indicator LED does not work Resolder 3 LEDs of LCD Module Replace LCD Module 5-14 Flow Chart of Troubleshooting and Circuit Diagrams...
  • Page 35 5-9 Backlight Backlight does not work Backlight "ON" mode Select backlight "ON" mode in the menu? R217 = "H" ? GPIO5 by test S/W KEY PCB LED Replace LCD Resolder R217,R218 Q201 pin 3 = "L" ? or Resolder Q201 Resolder R206,R211,R212,R213,R214, Key PCB LED on ?
  • Page 36 Flow Chart of Troubleshooting and Circuit Diagrams 5-16...

  • Page 37: Melody Part

    5-10 Melody Part Melody is not working U301 Pin 7 Check the circuit containing U104 is H ? Check U301 Pin 1 Check the R511 Working? U301 Check the C311, C315, C314 Pin 14 is working R316, R317, R318 Well spk + / spk - Change the U301 working...
  • Page 38 SPVSS SPVD HPOUT-R IOVD HPOUT-L/MONO Flow Chart of Troubleshooting and Circuit Diagrams 5-18...

  • Page 39: Gsm Receiver

    5-11 GSM Receiver Rx On RF input : CH center freq. + 67.7 kHz Amp. : -50 dBm U605 Resolder Pin 8 U604 -50 dBm Check U605 Check Ant. s/w VC1 : L Pin 10 control VC2 : L -53 dBm circuit Resolder U605...

  • Page 40: Gsm Transmitter

    5-12 GSM Transmitter Tx On (level : 5) U605 Resolder Pin 8 U604 ‡ 30 dBm U605 Check Change or Resolder VC1 : L Pin 5 U605 VC2 : H ‡ 30 dBm Check Ant. S/W Control Circuit U600 Resolder Pin 9 C612 ‡...

  • Page 41: Dcs Receiver

    5-13 DCS Receiver Rx On RF input : CH center freq. + 67.7 kHz Amp. : -50 dBm U605 Resolder Pin 8 U604 -50 dBm Check U605 Check Ant. s/w VC1 : L Pin 1 control VC2 : L -53 dBm circuit Resolder U605...

  • Page 42: Dcs Transmitter

    5-14 DCS Transmitter Tx On (level : 0) U605 Resolder Pin 8 U604 25 dBm U605 Check Change or Resolder VC1 : H Pin 3 U605 VC2 : L 25 dBm Check Ant. S/W Control Circuit U600 Resolder Pin 11 C614, C605 25 dBm Check...
  • Page 43 IFLB RFLA VDDA VDDC IFLA RFLB XOUT VDDD RFLC SCLK RFLD SENB VDD3 IFLOP PDNB IFLON RFLOP RFLON VDD2 VDD4 DIAG2 RFOG DIAG1 5-23 Flow Chart of Troubleshooting and Circuit Diagrams...
  • Page 44 GND4 GND3 GND2 GND1 VCC2 VCC2 Flow Chart of Troubleshooting and Circuit Diagrams 5-24...

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