Samsung SGH-T508 Service Manual Download Page 39

Page: 39 / 44

5-19

Flow Chart of Troubleshooting and Circuit Diagrams

5-11 GSM Receiver

Rx On

RF input : CH center freq. + 67.7 kHz

Amp. : -50 dBm

U605

Pin 8

≥

-50 dBm

U605

Pin 10

≥

-53 dBm

U501

Pin 1

≥

-53 dBm

U502

Pin 21, 22

≥

-58 dBm

U502

Pin 1, 2

≥

50 mV

U503

Pin 2, 3, 4, 5

> 100 mV

Resolder

U604

Check

VC1 : L
VC2 : L

Check

Ant. s/w

control

circuit

Resolder

C616

Resolder

U501, C505, C506, L501

Resolder

U401

Yes

Check

U502

Pin 12, 13

[(Freq-100KHz)*2]

≥

-6 dBm

OK?

Resolder

U605

Check

U502

Pin 14, 23, 26, 31, 32

> 2.7 V

OK?

Resolder

U503

Yes

Check

U503

Pin 14, 16, 17, 18

OK?

Check

U503

Pin 7, 20

OK?

Check

Radio PSU,

RF13MHz part

Yes

Check & Resolder

I/O signal, RF13MHz, RF PSU Part

Resolder

U502

Summary of Contents for SGH-T508

Page 1: ... BAND Mobile Cellular Phone SGH T508 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: ...Samsung Electronics Co Ltd Printed in Korea 02 2003 Rev 1 0 GH68 03491A ELECTRONICS ...

Page 3: ...in Bottom 3 Electrical Parts List 3 1 Main Parts List Top 3 2 Main Parts List Bottom 4 Block Diagrams 4 1 Main Baseband 4 2 Main RF 4 2 1 RF Transmit Part 4 2 2 RF Receive Part 5 Flow Chart of Troubleshooting and Circuit Diagrams 5 1 Power ON 5 2 Initial 5 3 Charging Part 5 4 Sim Part 5 5 Microphone Part 5 6 Receiver Part 5 7 Key Data Input 5 8 Ring Indicator 5 9 Backlight 5 10 Melody Part 5 11 GS...

Page 4: ...Exploded Views and Parts List 1 1 1 SGH T508 Exploded Views and Parts List 1 1 Main 14 1 8 16 12 19 2 3 4 6 7 5 9 10 18 11 13 15 17 20 ...

Page 5: ...R RF COVER ANTENNA REAR COVER VOLUME KEY SCREW BATTERY Description SEC CODE Remark Location NO GH75 02664A GH07 00278A 3001 001345 GH31 00048A GH75 02193A GH72 05017A 6001 001478 GH75 02194A GH75 02196A GH92 01446A GH59 00572A GH59 00571A GH59 00610A GH73 01338A GH73 01337A GH42 00242A GH75 02192A GH75 02195A 6001 001478 GH43 00769A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ...

Page 6: ...Exploded Views and Parts List 1 3 1 4 Travel Adapter Parts List TYPE SEC CODE REMARK A GH44 00171A CHINA B GH44 00184A EUROPE C GH44 00171C UNITED KINGDOM D Gh44 00171E TAIWAN 1 3 Travel Adapter A B C D ...

Page 7: ...1 4 1 5 Ciger Light Adapter Exploded Views and Parts List 1 6 Ciger Light Adapter Parts List DESCRIPTION SEC CODE REMARK Ciger Light Adapter Code GH44 00170A BLACK ...

Page 8: ...1 5 Exploded Views and Parts List 1 7 Test Jig TEST JIG GH80 10508A TEST JIG CABLE GH39 00079A RF CABLE GH39 00090A ...

Page 9: ...1 6 Exploded Views and Parts List 1 7 1 Test Jig DC POWER SUPPLY 232 CABLE TEST JIG CABLE RF CABLE 8922 or 8960 WIRELESS COMMUNICATIONS TEST SET Note PC ...

Page 10: ...Exploded Views and Parts List 1 7 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 ...

Page 11: ...R CN201 D110 DIGIT1 DIGIT10 DIGIT2 DIGIT3 DIGIT4 DIGIT5 DIGIT6 DIGIT7 DIGIT8 DIGIT9 DOWN END INT L201 L300 L410 L604 L605 LED200 LED201 LED202 LED203 LED204 LED205 LED206 LED207 LED208 LEFT R107 R108 R109 R206 R211 R212 R213 R214 R215 R216 R240 R241 R242 R243 R244 R309 R312 R314 R316 R317 R318 R419 R607 R608 R691 RIGHT SEND SOFT1 SOFT2 SYMBOL SYMBOL U100 U106 U108 U204 U301U601 U602 U603 UP V202 V...

Page 12: ... F201 F202 F203 H100 H101 H102 H103 JT1 JT10 JT11 JT12 JT13 JT14 JT15 JT2 JT3 JT4 JT5 JT6 JT7 JT8 JT9 L200 L500 L501 L502 L503 L504 L601 L602 L603 L606 L607 MIC1 OSC400 Q100 Q201 Q500 R100 R101 R103 R104 R105 R106 R110 R111 R112 R205 R208R209 R217 R218 R236 R237 R302 R304 R307 R310 R311 R319 R400 R401 R402 R403 R404 R406 R407 R408 R409 R410 R411 R412 R413 R414 R415 R416 R417 R418 R421 R422 R423 R4...

Page 13: ... 2 1405 001121 V202 2 1405 001121 V203 2 1405 001121 V204 2 2007 000138 R244 2 2007 000157 R216 2 2007 001325 R314 2 2007 007009 R243 2 2007 007107 R607 2 2007 007107 R608 2 2007 007137 R317 2 2007 007309 R691 2 2007 007313 R318 2 2007 007771 R312 2 2007 007771 R316 2 2007 000162 R419 2 2007 007009 R211 2 2007 007009 R212 2 2007 001290 R241 2 2007 001290 R241 2 2007 007009 R215 2 2007 007009 R240 ...

Page 14: ... 000679 C615 2 2203 000812 C601 2 2203 002443 C203 2 2203 005061 C202 2 2404 001086 C312 2 2203 000233 C602 2 2404 001105 C603 2 2203 000679 C303 2 2203 000679 C304 2 2203 005061 C305 2 2203 000254 C103 2 2203 000254 C120 2 2203 005061 C102 2 2203 005061 C123 2 2203 005061 C128 2 2404 001105 C122 2 2007 007771 L604 2 2007 007771 L605 2 3301 001362 L201 ...

Page 15: ...1121 V204 2 2007 000138 R244 2 2007 000157 R216 2 2007 001325 R314 2 2007 007009 R243 2 2007 007107 R607 2 2007 007107 R608 2 2007 007137 R317 2 2007 007309 R691 2 2007 007313 R318 2 2007 007771 R312 2 2007 007771 R316 2 2007 000162 R419 2 2007 007009 R211 2 2007 007009 R212 2 2007 001290 R241 2 2007 001290 R241 2 2007 007009 R215 2 2007 007009 R240 2 2007 001290 R241 2 2007 007009 R242 2 2007 007...

Page 16: ... 002443 C203 2 2203 005061 C202 2 2404 001086 C312 2 2203 000233 C602 2 2404 001105 C603 2 2203 000679 C303 2 2203 000679 C304 2 2203 005061 C305 2 2203 000254 C103 2 2203 000254 C120 2 2203 005061 C102 2 2203 005061 C123 2 2203 005061 C128 2 2404 001105 C122 2 2007 007771 L604 2 2007 007771 L605 2 3301 001362 L201 ...

Page 17: ...ture XVCC RTC_VCC Serial Data Interface I O Interface A D Interface AFC PLL Charging Circuit Li Ion Battery Standard ONE C VIBRATOR SYSTEM CLOCK 13MHz SRAM FLASH EEPROM RTC_CLOCK 32 768KHz KEYPAD SIM CARD SPEAKER MIC LCD BB INTERFACE RF INTERFACE DVCC2 5 AVCC2 5 VDD3 0 3VRF Charging Current LED_3V3 ...

Page 18: ...Filter U500 LNA LNA PGA PGA ADC ADC VCTCXO U504 EGSM TX 880 915 MHz CH62 902 4 MHz DCS TX 1710 1785 MHz CH698 1747 4 MHz Dual PAM U600 Antenna S W U605 RF Conector CN600 Si4200 U502 RF PLL IF PLL Si4133T U505 PD LPF Mixer Channel Filter PGA PGA DAC DAC 100 kHz Si4201 U503 VP40578 U401 Bryce Park I Q I Q SDATA SCLK SENB PDNB ...

Page 19: ...L Si4133 T U505 AFC VBATT Txpower from U401 3VRF 8 TXEN from U401 VC1 VC2 Ant S W Control Circuit BAND Selection VREG EGSM 1279 1314 MHz DCS 1327 1402 MHz 6dBm 1301 4 MHz G 9dBm 1364 4 MHz D 2 11 5 3 9 11 7 1 24 25 5 6 7 8 31 4 2 7 26 27 23 24 12 13 9 10 IF PLL 9 2 EGSM 880 895 MHz 798 MHz 895 900 MHz 790 MHz 900 915 MHz 798 MHz DCS 766 MHz 6dBm 798 MHz 9dBm 766 MHz 1 2 3 VC2 VC1 Tx GSM Tx DCS Rx ...

Page 20: ...W U605 RF Conector CN600 Si4200 U502 RF PLL Si4133 T U505 Mixer Channel Filter PGA PGA DAC DAC 100 kHz I O Si4201 U503 I Q EGSM 1849 8 1919 8 MHz DCS 1804 9 1879 9 MHz GSM 2 2 3 8 10 1 1 1 3 4 3 4 17 18 21 22 1 2 1 2 11 12 11 12 5 4 3 2 SDATA SCLK SENB AFC 4 2 7 7 23 24 12 13 PDNB 31 9 14 50dBm 947 067 MHz 50dBm 1842 467 MHz 51dBm 52dBm 6dBm 1895 6 MHz G 9dBm 1842 3 MHz D 52dBm 52dBm 50dBm G 54dBm...

Page 21: ...s more than 3 2V No Yes Yes Check the Dome sheet When the END key is pressed the voltage of D110 pin1 3 6V No Yes END pin 5 2 5 V Check the circuit related to U102 U108 No Check the initial operation Check U100 U104 and related circuit No Yes Check for the clock signal at R516 Check the clock generation circuit related to U504 and Q500 No Yes Yes U104 pin 5 3 0 V U102 U108 U100 pin 5 3 3 V ...

Page 22: ...3V ON OFF VIN 1 5 VOUT C100 6 3V 100UF UMN1 D110 VIN 1 VOUT 5 C114 6 3V 10UF 3 GND LP2985AIM5 3 3 U100 BYPASS 4 2 R110 100K C123 100NF DVCC2 5 6 3V BAT100 RB414_IV02N C102 100NF R107 100K U108 LP3985IM5X 2 5 4 BYPASS GND 2 3 ON OFF 1 VIN VOUT 5 100K R105 C113 10UF 6 3V 10NF C150 C111 10NF U104 LP2985AIM5 3 0 BYPASS 4 GND 2 ON OFF 3 100K 1UF C105 100NF C128 10NF C104 AVCC2 5 100K R109 2 GND 3 ON OF...

Page 23: ...Downloading SW is OK Is CSROM signal OK The node between R408 and C408 H RST No Check the circuit related to reset R412 H BOOT No Resolder R412 Yes R425 H MSIZE No Resolder R425 Yes R426 L EXTPROC No Resolder R426 Yes Replace PBA Check all the other connection by Test S W Check the circuit around LCD Check the circuit around U402 EEPROM and data stored in it Yes ...

Page 24: ...Flow Chart of Troubleshooting and Circuit Diagrams 5 4 U401 U400 U300 VCC VCC R408 C408 R412 R425 BOOT SYSRST GPIO3 MSIZE CSROM _CE ...

Page 25: ...5 3 Charging Part Abnormal charging part Replace TA Check the CN301 pin 17 18 4 9 V No Yes Yes Check the U103 pin 3 4 9 V Resolder U103 U915 Yes No R103 CHG_ON side L Resolder R103 Yes No Resolder components around U103 Check the U106 pin 5 4 2V END Yes No ...

Page 26: ...ng and Circuit Diagrams 5 6 ICHAG DCVOLT VBATT CHG_ON BAT_VOLT LTC1734ES6 4 2 TR U103 C118 100NF R104 100K 1 R112 82K 1 16V 1UF C119 R103 2 7K 3 1 2 5 6 4 Q100 ZXT13P20DE6 U915 1UF 16V 6 DRIVE 2 GND ISENSE 1 4 PROG VCC 3 VSENSE 5 ...

Page 27: ...around U402 Serial EEPROM and data stored in it Yes Phone can t access SIM card Yes U101 pin 2 3 3 0 V Replace U101 Yes No After Power ON Check SIMCLK Signal on CN100 pin 3 in a few second After SIM card insert CN100 pin 2 H SIMRST Resoldering C109 or Replace PBA Replace PBA Yes No No U101 pin4 3 0 V Yes No Check the circuit around U104 ...

Page 28: ... Diagrams 5 8 9 G G 10 1 1 2 2 3 3 4 4 5 5 6 6 7 G G 8 R111 PC D6 A3 H2 7 S CN100 C107 4 7K 27PF 27PF C108 R101 27PF C109 47K 4 VDD3 0 C106 1UF FDG6323L U101 ON OFF 5 6 R1 C1 1 R2 V C1 1 2 V C1 2 3 VIN R1 SIMRST SIMDATA SIMCLK SIMPWREN SIMVCC ...

Page 29: ...es not work Resolder EAR400 EAR400 pin 4 5 short U102 pin 5 AVCC 2 5V Check the circuit RC Filter to MIC1 Check the circuit related to U102 END Resolder the R422 R423 R423 R429 C415 C417 C416 C420 Yes No Yes Yes Yes No No Check the tension of MIC Module Replace the Mic or Mic Holder No Yes ...

Page 30: ...Flow Chart of Troubleshooting and Circuit Diagrams 5 10 EAR400 MIC1 U401 PWI1P PWI1N MIC MIC 1 5 4 MIC MIC RC FILTER ...

Page 31: ...leshooting and Circuit Diagrams 5 11 5 6 Receiver Part Speaker does not work Yes EAR400 pin 2 3 short Resolder EAR400 EAR400 pin 2 3 6 1 25 V No No Replace the PBA Yes Yes U205 pin 7 8 Resolder U205 R237 R236 END Yes No L ...

Page 32: ...Flow Chart of Troubleshooting and Circuit Diagrams EAR400 U205 U401 PWO1P PWO1N Rec Rec 6 2 3 SPK SPK U301 Spout1 Spout2 COM1 COM2 SW SW SPEAKER 5 12 ...

Page 33: ...a Input Check Initial operation Check the Dome sheet When one of the keys is pushed is it displayed on LCD Keypad is OK END Replace the PBA Yes No Yes Yes No Flow Chart of Troubleshooting and Circuit Diagrams 5 13 ...

Page 34: ...Flow Chart of Troubleshooting and Circuit Diagrams 5 8 Ring Indicator Ring Indicator LED does not work Replace LCD Module Resolder 3 LEDs of LCD Module END No Yes 5 14 ...

Page 35: ...s not work Select backlight ON mode Backlight ON mode in the menu R217 H GPIO5 by test S W No Yes Yes No Replace LCD KEY PCB LED Resolder R217 R218 or Resolder Q201 Q201 pin 3 L No Yes Yes END Key PCB LED on Resolder R206 R211 R212 R213 R214 R215 R240 R241 R242 R243 or Replace PBA No ...

Page 36: ...5 16 Flow Chart of Troubleshooting and Circuit Diagrams Q201 U401 R217 R218 KeyPAD LED GPIO5 ...

Page 37: ...dy Part Melody is not working Check the circuit containing U104 U301 Pin 7 is H Yes Yes Check the R511 Check U301 Pin 1 Working Yes END Check the C311 C315 C314 R316 R317 R318 spk spk working Change the U301 Yes Yes Pin 14 is working Well U301 Yes Change the speaker ...

Page 38: ...F 3 3K 68NF C311 C314 28 WR 1NF C307 7 VDD 9 VRE F VS S 8 29 CS 3 IRQ 31 RD RST 4 2 LED MTR 19 NC 5 PLLC 6 17SPOUT 1 SPOUT 2 18 15 SPVD D SPVSS 16 21 D6 D7 20 EQ 1 12 13 EQ 2 EQ 3 14 HPOUT L MONO 10 11 HPOUT R 32 IOVD D U301 YMU762 MA 3 A0 30 1 CLKI D0 27 26 D1 25 D2 D3 24 23 D4 D5 22 M_IR Q M_RESET WR LINE_OUT M_LED MEL13M D 0 D 1 D 2 D 3 D 4 D 5 D 6 D 7 VBAT T VIBRATOR RD M_CS SPK SPK A 1 ...

Page 39: ...esolder U604 Check VC1 L VC2 L Check Ant s w control circuit Resolder C616 Resolder U501 C505 C506 L501 Resolder U401 No No No No Yes Yes Yes Yes Yes Yes Yes No No Yes Check U502 Pin 12 13 Freq 100KHz 2 6 dBm OK No Resolder U605 Check U502 Pin 14 23 26 31 32 2 7 V OK Resolder U503 No Yes Yes No Check U503 Pin 14 16 17 18 OK Check U503 Pin 7 20 OK No Check Radio PSU RF13MHz part Yes No Check Resold...

Page 40: ...heck VC1 L VC2 H Change or Resolder U605 Resolder C612 Resolder R509 R507 No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Check Ant S W Control Circuit Check U600 VBATT Pin 2 5 6 OK Resolder or Change U600 Yes Check VBATT or PAM Control signal No No Yes Check U502 Pin 9 10 12 13 6 dBm OK Resolder U600 Check U502 Pin 14 23 26 31 32 2 7 V OK Yes No Check Resolder I O signal RF13MHz RF PSU Part Res...

Page 41: ...older U604 Check VC1 L VC2 L Check Ant s w control circuit Resolder C617 L603 Resolder U500 C502 C503 L500 Resolder U401 No No No No Yes Yes Yes Yes Yes Yes Yes No No Yes Check U502 Pin 12 13 Freq 100KHz 6 dBm OK No Resolder U605 Check U502 Pin 14 23 26 31 32 2 7 V OK Resolder U503 No Yes Yes No Check U503 Pin 14 16 17 18 OK Check U503 Pin 7 20 OK No Check Radio PSU RF13MHz part Yes No Check Resol...

Page 42: ...ck VC1 H VC2 L Change or Resolder U605 Resolder C614 C605 Resolder R504 R502 No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Check Ant S W Control Circuit Check U600 VBATT Pin 2 5 6 OK Resolder or Change U600 Yes Check VBATT or PAM Control signal No No Yes Check U502 Pin 9 10 12 13 6 dBm OK Resolder U600 Check U502 Pin 14 23 26 31 32 2 7 V OK Yes No Check Resolder I O signal RF13MHz RF PSU Part ...

Page 43: ...FLOP 24 SCLK 12 SDI 13 SDO 10 11 SENB 5 VDDD VDDI 26 27 IFLOP NC 8 NC 14 PDNB 9 20 RFLA RFLB 19 RFLC 17 RFLD GND 18 GND 21 GND GND 22 GND 29 GND 30 3 IFLA IFLB 2 IFLON SI4133T BM U505 1 GND GND 31 GND 32 GND 4 GND 6 15 2SC4617 2 3 1 C508 22NF Q500 L504 1 0nH C501 22NF R516 1K 1 TXIP TXQN 8 7 TXQP 23 VDD1 VDD2 14 VDD3 32 VDD4 26 RFIGP RFIPN 18 17 RFIPP RFLON 13 RFLOP 12 RFOD 24 25 RFOG 6 TXIN 5 2 I...

Page 44: ... VRAMP 5 VREG 12K 1 R690 GSMIN GSMOUT 9 11 PCSOUT 3 TXEN VBATT 4 10 VCC VCC2 8 12 VCC2 6 U600 RF3140 BAND 2 DCSIN 1 13 GND 7 33nH L605 IN 1 OUT 2 NC L603 CN600 MHC 175 GND1 3 4 GND2 GND3 5 6 GND4 C608 1NF C616 22PF C602 100PF 2 7nH L607 R604 10K 1 33PF C614 L604 33nH 33PF C630 C611 27PF 10UF 6 3V C603 7 G 9 12 G G 13 14 G VC1 2 11 VC2 LMG002S 5047A 8 ANT 1 DCS_RX 3 DCS_TX EGSM_RX 10 EGSM_TX 5 4 G ...

Search results

Summary of Contents for SGH-T508

Reviews:

Related manuals for SGH-T508

Brands by name

Popular brands

Samsung SGH-T508, Service Manual

Search results

Summary of Contents for SGH-T508

Reviews:

Related manuals for SGH-T508

Brands by name

Popular brands