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Samsung SGH-E750, Service Manual

The Samsung SGH-E750 Service Manual is available for free download on our website. This comprehensive manual provides detailed instructions, troubleshooting tips, and essential information to ensure optimal performance and extend the lifespan of your device. Get your user manual now at manualshive.com for an effortless and efficient product experience.

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SAMSUNG Proprietary-Contents may change without notice

This Document can not be used without Samsung's authorization

Flow Chart of Troubleshooting

7-30

7-15. DCS Receiver

Module1 Pin8

>= -65dBm

Resolder CN100, C103

No

Yes

RX ON

RF input : 698CH

Amp : -50dBm

Check Module1

pin9,pin10,pin12 = L

Module1 pin3, pin4

>= -65dBm

U100

D1 >= -70dBm
C1 >= -70dBm

Check ANT Switch

control circuit

Resolder Module1

Resolder C105, C106, L104, L105

Yes

Yes

Yes

No

No

No

END

U100 H7,H8,J7,J8

>= 1V

Check U100

J2,A6,B6,A9,E9

>=2.7V

Check & Resolder

U100, R117

RF26MHz, RF PSU Part

Resolder U100

C142, C146

>= 1V

Yes

Yes

Yes

Yes

No

No

Check U200

Summary of Contents for SGH-E750

Page 1: ...SM TELEPHONE SGH E750 GSM TELEPHONE CONTENTS 1 Specification 2 Circuit Description 3 Exploded Views and Parts List 4 Electrical Parts List 5 Block Diagrams 6 PCB Diagrams 7 Flow Chart of Troubleshooting ...

Page 2: ...Ltd September 2005 Printed in Korea Code No GH68 08355A BASIC This Service Manual is a property of Samsung Electronics Co Ltd Any unauthorized use of Manual can be punished under applicable International and or domestic law ⓒ ...

Page 3: ... 1023 512 885 512 810 Tx Rx spacing 45MHz 45MHz 95MHz 80MHz Mod Bit rate Bit Period 270 833kbps 3 692us 270 833kbps 3 692us 270 833kbps 3 692us 270 833kbps 3 692us Time Slot Period Frame Period 576 9us 4 615ms 576 9us 4 615ms 576 9us 4 615ms 576 9us 4 615ms Modulation 0 3GMSK 0 3GMSK 0 3GMSK 0 3GMSK MS Power 33dBm 13dBm 33dBm 5dBm 30dBm 0dBm 30dBm 0dBm Power Class 5pcl 15pcl 5pcl 19pcl 0pcl 15pcl ...

Page 4: ...3 dBm 16 11 5 dBm 17 9 5 dBm 18 7 5 dBm 19 5 5 dBm TX Power control level DCS1800 0 30 3 dBm 1 28 3 dBm 2 26 3 dBm 3 24 3 dBm 4 22 3 dBm 5 20 3 dBm 6 18 3 dBm 7 16 3 dBm 8 14 3 dBm 9 12 4 dBm 10 10 4 dBm 11 8 4dBm 12 6 4 dBm 13 4 4 dBm 14 2 5 dBm 15 0 5 dBm 1 2 GSM TX power class TX Power control level PCS1900 0 30 3 dBm 1 28 3 dBm 2 26 3 dBm 3 24 3 dBm 4 22 3 dBm 5 20 3 dBm 6 18 3 dBm 7 16 3 dBm ...

Page 5: ...s of the system through the transceiver pin VCXOOUT1 Transceiver U100 This chip is a RF transceiver IC for GSM850 900 DCS1800 and PCS1900 Quad band cellular system and incorporates GPRS transceiver capability and integrates most of the low power silicon functions of a transceiver It incorporates triple RF LNAs direct conversion mixers which are IQ demodulator an auto offset calibrated programmable...

Page 6: ...t Brightness Modulator BBM contains a programmable Pulse width modulator PWM and FET to modulate the intensity of a series of LED s or to control a DC DC converter that drives LCD backlight Clock Generator The Clock Generator CG generates all clocks for internal and external usage The 32 768 kHz crystal oscillator provides an accurate low clock frequency for the PCF50603 and other circuitry 2 2 2 ...

Page 7: ...ng s memory KBJ10KB00A The KBJ10KB00A is a Multi Chip Package Memory whichcombines 256Mbit Synchronous Burst Multi Bank NOR Flash Memory and 1Gbit NAND Flash and 128Mbit Synchronous Burst U tRAM It has 16 bit data line HD 1 16 which is connected to PCF5213 and MV3315DOQ also has 24 bit address lines HA 1 24 There are 3 chip select signals CS0n_FLASH CS4n_NAND and CS1n_RAM In the Wrting process WEn...

Page 8: ...ls requency from 26MHz x tal It generates the clock frequency This clock is connected to PCF5213EL1 YMU765 and MV3315DOQ 2 2 11 Camera DSP MV3315DOQ MV3315DOQ provides rich video functions up to 30 frame display with minimized tasks in the handset main processor as well as hardware based real time JPEG compression and decompression MV3315DOQ directly transmits and previews the RGB data to the LCD ...

Page 9: ...not be used without Samsung s authorization 3 Exploded View and Parts List 3 1 Exploded View QFU01 QVK01 QME01 QRE01 QVO01 QVO08 QME03 QLC01 QMO01 QFL01 QSP01 QSC14 QCR06 QMW02 QFR01 QMI03 QKP01 QMP01 QCA02 QMI01 QCA01 QAN02 QRF01 QCK01 QCW01 QCR07 QBA01 QCR06 QHI01 QRF03 QIF01 ...

Page 10: ...Y FPCB SGH E750 YWCE750 EU GH59 02280A QMI01 ㅤ MICROPHONE ASSY SGHE750 2 130 500uA GH30 00207A QMO01 ㅤ MOTOR DC SGHZ130 DMJBRK20NZ SGH Z130 GH31 00153J QMP01 ㅤ PBA MAIN SGHE750 SGH E750 XET EU PBA GH92 02273A QMW02 ㅤ PCT MAIN WINDOW SGH E750 ACRYL TRP GH72 22356A QRF01 ㅤ PMO RF COVER SGH E750 URETHANE PC K2 GH72 22324A QSC14 ㅤ PMO FOLDER SCREW COVER SGH E750 POLY GH72 24658A QSP01 ㅤ SPEAKER 0 8W 8...

Page 11: ...TC HINGE SCH S400 STS 4 7 GH61 00174A LABEL P WATER SOAK COMM NORGE 100G GH68 02026A MANUAL SFC COMM SAMSUNG RUSSIAN RUSS GH68 04336A MANUAL USER SGH E750 SER RUSSIAN RUS GH68 07660A LABEL R MAIN SER SGH E750 SER POLY GH68 07759B CUSHION CASE MAIN SGH E750 PULP T0 5 GH69 03134A PMO BATTER LOCKER SGH E750 PC K2261 GH72 22322A MPR BOHO VINYL LENZ PR SGH E630 3M 4 GH74 10815A MPR BOHO VINYL LCD CONN ...

Page 12: ...st 3 4 This Document can not be used without Samsung s authorization 3 3 Test Jig GH80 03306A 3 3 2 RF Test Cable GH39 00283A 3 3 3 Test Cable GH39 00337A 3 3 5 Power Supply Cable 3 3 6 DATA CABLE GH39 00331A 3 3 7 TA GH44 00482A 3 3 1 USB JIG Cable 3 3 4 Serial Cable CSA LL64151 A ...

Page 13: ...CHIP 2203 000628 C200 C306 C402 C403 C CERAMIC CHIP 2203 006208 C206 C207 C208 C209 C CERAMIC CHIP 2203 005482 C210 C704 C705 C706 C CERAMIC CHIP 2203 005682 C211 C212 C213 C214 C CERAMIC CHIP 2203 005482 C216 C301 C302 C305 C CERAMIC CHIP 2203 005482 C300 C620 C CERAMIC CHIP 2203 000254 C304 C CERAMIC CHIP 2203 000725 C307 C308 C311 C313 C CERAMIC CHIP 2203 005482 C309 C CERAMIC CHIP 2203 000550 ...

Page 14: ...SMD 2703 002281 L107 INDUCTOR SMD 2703 002596 L108 INDUCTOR SMD 2703 002208 L111 INDUCTOR SMD 2703 001752 L400 CORE FERRITE BEAD 3301 001120 L401 INDUCTOR SMD 2703 002840 L402 R103 R113 R118 R CHIP 2007 000171 L700 CORE FERRITE BEAD 3301 001534 L701 CORE FERRITE BEAD 3301 001342 LED700 LED701 LED702 LED 0601 002055 LED703 LED704 LED705 LED 0601 002055 LED706 LED707 LED708 LED 0601 002055 LED709 LE...

Page 15: ...007 007573 R511 R CHIP 2007 000137 R513 R CHIP 2007 008275 R514 R CHIP 2007 007489 R515 R516 R CHIP 2007 000172 R602 R606 R725 R CHIP 2007 000148 R605 R607 R CHIP 2007 000242 R610 R CHIP 2007 001339 R612 R CHIP 2007 007480 R701 R702 R703 R704 R CHIP 2007 002970 R705 R706 R707 R708 R CHIP 2007 002970 R709 R710 R711 R712 R CHIP 2007 002970 R713 R714 R727 R729 R CHIP 2007 002970 R717 R CHIP 2007 0001...

Page 16: ...502 FILTER EMI SMD 2901 001315 U503 IC 1203 003742 U600 IC 1001 001333 U603 IC 1202 001068 U701 IC 1009 001010 U702 IC 1203 003046 U703 RF MODULE 4709 001374 V300 V301 V302 V303 VARISTOR 1405 001082 V400 V701 V702 V703 VARISTOR 1405 001082 V500 THERMISTOR 1404 001221 V704 V705 VARISTOR 1405 001082 ZD500 DIODE ZENER 0403 001547 ZD600 ZD601 DIODE TVS 0406 001208 ZD701 ZD702 ZD703 DIODE TVS 0406 0012...

Page 17: ...SAMSUNG Proprietary Contents may change without notice This Document can not be used without Samsung s authorization 5 Block Diagrams 5 1 5 1 RF Solution Block Diagram ...

Page 18: ...SAMSUNG Proprietary Contents may change without notice Block Diagrams This Document can not be used without Samsung s authorization 5 2 5 2 Base Band Solution Block Diagram ...

Page 19: ...SAMSUNG Proprietary Contents may change without notice 6 PCB Diagrams 6 1 This Document can not be used without Samsung s authorization 6 1 PCB Top Diagram ...

Page 20: ...SAMSUNG Proprietary Contents may change without notice PCB Diagrams 6 2 This Document can not be used without Samsung s authorization 6 2 PCB Bottom Diagram ...

Page 21: ...e initial operation Yes No Check the clock generation circuit related to U100 Check for the clock at C303 26MHz Check the VDD_GSM_CORE circuit C402 VDD_GSM_CORE 1 8V No C430 VDD_IO_LOW C429 VDD_IO_HIGH H Yes No Resolder OSC400 Check the Clock at R402 32KHZ Yes No Change the PMU U405 Yes No END Change the Battery Power On does not work Check the Battery Voltage is more than 3 4V Yes ...

Page 22: ... IO 6 7 NC NC 8 R401 OSC400 2 1 44 _SIMRSHC 7 32 VINT 29 VSAVE 30 _IRQ 10 _ONKEY 27 _REC1 1 _REC2 13 _RSTHC 11 _SIMRSCD SIMCKHC 8 SIMD3VBAT 40 SIMEN 45 SIMIOCD 42 SIMIOHC 9 SIMVCC 41 VBAT 31 VCHG 28 RF12VBAT 23 22 RF1VDD RF2VDD 24 SCL 2 SCN 38 SCP 37 SDA 3 SIMCKCD 43 MICBIAS 12 NC 53 54 NC OSCI 26 OSCO 25 PWREN1 6 PWREN2 5 REFC 48 GPO2 47 GPO3 46 18 HCVBAT HCVDD 17 IOD2VBAT 15 14 IOVDD 20 LPD1VBAT...

Page 23: ...SAMSUNG Proprietary Contents may change without notice Flow Chart of Troubleshooting This Document can not be used without Samsung s authorization 7 3 ...

Page 24: ...low Chart of Troubleshooting 7 4 7 2 Initial U200 pin 12 RSTON H Initial Failure Check the circuit related to reset END No Yes Is U200 R203 R204 OK Yes Yes No Check the U200 Check the 16bit data signal Yes Yes Check the Battery Voltage is more than 3 4V No Change the Battery Yes No Check U405 pin 4 32MHz Change the PMU ...

Page 25: ...SAMSUNG Proprietary Contents may change without notice Flow Chart of Troubleshooting This Document can not be used without Samsung s authorization 7 5 ...

Page 26: ...w Chart of Troubleshooting 7 6 7 3 Charging Part Yes Resolder or replace U503 Check the circuit related to AUX_ON signal Resolder or replace U503 Check the circuit related to V_EXT_CHARGE Yes No Check the U503 pin 10 4 2V Yes No U503 pin 3 L Yes No U503 pin 5 L Yes No END Abnormal charging part Check the U503 pin 1 4 9V ...

Page 27: ...ument can not be used without Samsung s authorization 7 7 BATTERY CHARGING R512 VBAT R514 C504 3 _PPR 11 GND GND 8 9 ICDL 6 IMIN USB 2 USBON 7 _CHG 4 _EN 5 U503 BAT 10 CRDL 1 ZD500 R510 C503 C506 C507 VDD_IO_HIGH C505 R511 R513 D500 END_OF_CHG CHG_ON AUX_ON MES_BATT V_EXT_CHARGE VBUS USB_CHG_ON ...

Page 28: ...zation Flow Chart of Troubleshooting 7 8 7 4 Sim Part SIM400 pin 1 5 H Phone can t access SIM Card Check the sim charge pump Check the SIM Card END No Yes Yes Yes No Check the Clock After Power ON Check SIMCLK Signal on pin3 of SIM400 in a few Yes No Replace PBA After SIM card insert SIM400 pin 2 H SIM_RST Yes ...

Page 29: ...OSC400 2 1 44 _SIMRSHC 7 32 VINT 29 VSAVE 30 _IRQ 10 _ONKEY 27 _REC1 1 _REC2 13 _RSTHC 11 _SIMRSCD SIMCKHC 8 SIMD3VBAT 40 SIMEN 45 SIMIOCD 42 SIMIOHC 9 SIMVCC 41 VBAT 31 VCHG 28 RF12VBAT 23 22 RF1VDD RF2VDD 24 SCL 2 SCN 38 SCP 37 SDA 3 SIMCKCD 43 MICBIAS 12 NC 53 54 NC OSCI 26 OSCO 25 PWREN1 6 PWREN2 5 REFC 48 GPO2 47 GPO3 46 18 HCVBAT HCVDD 17 IOD2VBAT 15 14 IOVDD 20 LPD1VBAT LPVDD 19 D1VDD 21 16...

Page 30: ...ion Flow Chart of Troubleshooting 7 10 7 5 Microphone Part Replace the MIC No Check the MIC Yes Microphone does not work Check the JACK_EN signal No Check CN601 PIN 8 H No Yes Yes Yes Yes No END Resolder the R300 C600 R603 R604 C603 C606 Resolder MIC Check the circuit from U200 to MIC Check the connection from MIC ...

Page 31: ...Flow Chart of Troubleshooting This Document can not be used without Samsung s authorization 7 11 MAIN_MIC Close to MCP Close to microphone C602 C606 R603 C605 R602 R600 C604 C607 ZD600 1 2 3 4 5 6 C608 MIC_BIAS C603 R604 MIC600 C600 C601 MIC_CP MIC_N MIC_P ...

Page 32: ...bleshooting 7 12 7 6 Speaker Part Melody Check the U302 Pin 3 15 Speaker does not work Check the U600 Pin 11 EAR1 Replace the U600 No Yes No Check the U300 Resolder C311 C315 Yes Check LCD connector CN700 PIN 37 38 Resolder CN700 No Yes No END Check speaker SPK SPK Operate Replace SPK Yes Yes Check LCD Module Replace LCD Module No Yes ...

Page 33: ...HD 0 26M_DIGIT HA 1 VIB M_LED HD 7 HD 6 HD 5 HD 4 HD 3 HD 2 WEn RSTON OEn M_INT CS5n_MELODY ANL ANR C720 C718 C724 VDD_IO_HIGH C728 C708 C722 C709 VBAT C721 C729 C705 C706 C707 C713 C710 C711 C719 C726 C727 C725 C712 8 8 9 9 39 39 4 4 40 40 41 41 42 42 5 56 6 7 7 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 23 23 24 24 25 25 26 26 27 27 28 28 29 29 3 3 30 30 16 16 17 17 18 18 19 19 2 2 20 20 21...

Page 34: ...SAMSUNG Proprietary Contents may change without notice This Document can not be used without Samsung s authorization Flow Chart of Troubleshooting 7 14 ...

Page 35: ... used without Samsung s authorization 7 15 7 7 Key Data Input When one of the keys is pushed Isn t it displayed on LCD Check the Dome sheet Key Pad END No Yes Yes Check Initial Operation When one of the keys is pushed KEY_ROW 0 4 KEY_COL 0 4 signal is OK Resolder V701 V702 703 704 705 ZD701 ZD702 ZD703 No Yes ...

Page 36: ...amsung s authorization Flow Chart of Troubleshooting 7 16 CAMERA_KEY End_Key VOLUME_KEY V702 4 GND 5 GND1 3 V_COMMON V_DOWN 2 1 V_UP NEW_VOLUM_KEY2 VOL700 V703 END 12 V705 ZD701 NEW_VOLUM_KEY_1 VOL701 3 GND 1 IN 2 OUT ZD703 ZD702 V704 V701 KEY_ROW 3 KEY_ROW 4 KEY_COL 1 KEY_COL 0 ONKEYN KEY_ROW 3 ...

Page 37: ...SAMSUNG Proprietary Contents may change without notice Flow Chart of Troubleshooting This Document can not be used without Samsung s authorization 7 17 ...

Page 38: ...ed without Samsung s authorization Flow Chart of Troubleshooting 7 18 7 8 Receiver Part U600 EAR1 EAR2 1 5V Resolder U200 or change PBA END No Yes Yes Receiver does not work LCD MODULE SPK PAD 1 5V Change the LCD Module No Yes No Resolder CN700 Yes Check LCD connector CN700 pin 37 38 ...

Page 39: ...H C728 C708 C722 C709 VBAT C721 C729 C705 C706 C707 C713 C710 C711 C719 C726 C727 C725 C712 8 8 9 9 39 39 4 4 40 40 41 41 42 42 5 56 6 7 7 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 23 23 24 24 25 25 26 26 27 27 28 28 29 29 3 3 30 30 16 16 17 17 18 18 19 19 2 2 20 20 21 21 22 22 1 1 10 10 11 11 12 12 13 13 14 14 15 15 CN700 C704 C723 LCD_BL_ON L_WR LD 3 LD 4 LD 5 LD 6 LD 7 LD 8 LD 9 LD 10 LD ...

Page 40: ...SAMSUNG Proprietary Contents may change without notice This Document can not be used without Samsung s authorization Flow Chart of Troubleshooting 7 20 ...

Page 41: ...out Samsung s authorization 7 21 7 9 Back Light for Color Main LCD Is LCD Contrast set on high level in the Menu Set LCD Contrast on high level END No Yes Yes Backlight does not work IC8 pin 5 H Change the board to board Connector No Yes IC8 PIN 2 Vbat Check the IC8 the related circuit No Yes Yes Replace the LCD Module ...

Page 42: ...SAMSUNG Proprietary Contents may change without notice This Document can not be used without Samsung s authorization Flow Chart of Troubleshooting 7 22 ...

Page 43: ...s Yes Main Key LED does not work R712 56 R711 56 VOUT 56 R710 U700 CE 6 GND 2 5 GND NC 4 VDD 1 3 LED710 56 R704 LED706 56 R727 LED713 LED715 10V 1000nF C702 R791 LED723 56 R790 56 LED722 56 R706 R714 56 LED711 LED701 R709 56 56 R713 LED719 LED718 R703 56 56 R729 LED717 LED712 LED703 LED704 56 R705 LED702 56 R708 LED700 LED708 LED707 R734 56 56 R733 LED721 R701 56 56 R731 R702 56 R707 56 56 LED720 ...

Page 44: ...leshooting 7 24 7 11 Camera part Camera function does not work Yes No Reconnect the camera module CN704 Check the Camera connector Yes CN 704 Pin 1 20 2 8V No Check the U405 or IC5 Yes END CN704 Pin 17 19 2 8V Yes No Check the U405 or I C CN 704 Pin 1 20 2 8V Yes No Replace the Camera Module Check the camera module Change the PBA No Yes ...

Page 45: ...1 VBAT 31 VCHG 28 RF12VBAT 23 22 RF1VDD RF2VDD 24 SCL 2 SCN 38 SCP 37 SDA 3 SIMCKCD 43 MICBIAS 12 NC 53 54 NC OSCI 26 OSCO 25 PWREN1 6 PWREN2 5 REFC 48 GPO2 47 GPO3 46 18 HCVBAT HCVDD 17 IOD2VBAT 15 14 IOVDD 20 LPD1VBAT LPVDD 19 D1VDD 21 16 D2VDD D3VDD 39 GND 49 50 GND GND 51 52 GND GPO1 U405 CHGCUR BATMAX 34 CHGDRV 33 CLK32K 4 CPVBAT 36 CPVDD 35 IT_PMU ONKEYN AUX_ON RSTON SIMRST VDD_RX_TX VCC_SYN...

Page 46: ...SAMSUNG Proprietary Contents may change without notice This Document can not be used without Samsung s authorization Flow Chart of Troubleshooting 7 26 ...

Page 47: ...ay change without notice Flow Chart of Troubleshooting This Document can not be used without Samsung s authorization 7 27 7 13 BLUETOOTH BLUETOOTH does not work Yes R126 H No Check the U200 Yes Replace ANT102 No Replace U703 Yes END ...

Page 48: ...Resolder CN100 C103 No Yes RX ON RF input 62CH Amp 50dBm Check Module1 pin9 pin10 pin12 L Module1 pin1 pin2 65dBm Check ANT Switch control circuit Resolder Module1 Yes Yes No No END U100 H7 H8 J7 J8 1V U100 E1 70dBm F1 70dBm Resolder C108 C112 L107 Check U100 J2 A6 B6 A9 E9 2 7V Check Resolder U100 R117 RF26MHz RF PSU Part Resolder U100 C142 C146 1V Yes Yes Yes Yes Yes No No No Check U200 ...

Page 49: ...dule1 pin10 H 2 68V pin9 pin12 L Module1 pin11 18dBm U101 pin8 18dBm U101 7pin 11dBm Change or Resolder Module1 Check ANT Switch control circuit Resolder R122 L106 Yes Check U101 VBAT pin4 pin6 OK Resolder or Change U101 Check VBAT or U101 control signal No No No No Yes Yes Yes Yes Yes No Yes No No No Check Resolder U100 R117 RF26MHz RF PSU Part Check U100 J2 A6 B6 A9 E9 2 7V U100 H7 H8 J7 J8 1V Y...

Page 50: ...older CN100 C103 No Yes RX ON RF input 698CH Amp 50dBm Check Module1 pin9 pin10 pin12 L Module1 pin3 pin4 65dBm U100 D1 70dBm C1 70dBm Check ANT Switch control circuit Resolder Module1 Resolder C105 C106 L104 L105 Yes Yes Yes No No No END U100 H7 H8 J7 J8 1V Check U100 J2 A6 B6 A9 E9 2 7V Check Resolder U100 R117 RF26MHz RF PSU Part Resolder U100 C142 C146 1V Yes Yes Yes Yes No No Check U200 ...

Page 51: ...1 pin12 H 2 68V pin9 pin10 L Module1 pin13 18dBm U101 pin9 18dBm U101 pin1 11dBm Change or Resolder Module1 Check ANT Switch control circuit Resolder C109 L108 C113 Yes Check U101 VBAT pin4 pin6 OK Resolder or Change U101 Check VBAT or U101 control signal No No No No No Yes Yes Yes Yes Yes No Yes U100 H7 H8 J7 J8 1V Check Resolder U100 R117 RF26MHz RF PSU Part Yes No No END Check U200 Resolder U10...

Page 52: ...lder CN100 C103 No Yes RX ON RF input 661CH Amp 50dBm Check Module1 pin9 H pin10 pin12 L Module1 pin5 pin6 65dBm U100 B1 70dBm A1 70dBm Check ANT Switch control circuit Resolder Module1 Resolder C114 C115 L109 L110 Yes Yes Yes No No No END U100 H7 H8 J7 J8 1V Check U100 J2 A6 B6 A9 E9 2 7V Check Resolder U100 R117 RF26MHz RF PSU Part Resolder U100 C142 C146 1V Yes Yes Yes Yes No No Check U200 ...

Page 53: ...in12 H 2 68V pin9 pin10 L Module1 pin13 18dBm U101 pin9 18dBm U101 pin1 11dBm Change or Resolder Module1 Check ANT Switch control circuit Resolder L102 L108 C113 Yes Check U101 VBAT pin4 pin6 OK Resolder or Change U101 Check VBAT or U101 control signal No No No No No Yes Yes Yes Yes Yes No Yes U100 H7 H8 J7 J8 1V Check Resolder U100 C147 R117 RF26MHz RF PSU Part Yes No No END Check U200 Resolder U...

Page 54: ...121 8 TXEN 3 4 VBATT VRAMP 6 1NF C134 50V U101 2 BAND 1 DCS PCSIN 9 DCS PCSOUT GND 10 5 GND 7 GSMIN GSMOUT C124 OUT 3 4 VCC VCON 1 OSC100 2 GND C100 C102 R125 C111 R103 VCC_SYN 0 L103 C148 C110 R101 L104 E1 E2 4 R107 Q103 PEMD10 B1 2 B2 5 6 C1 C2 3 1 C146 NC C109 NC J2 VCCOPLL J3 VCCTXVCO J4 TXOUTD J5 TXOUTG J6 GNDTXVCOG2 J7 IOUT IIN J8 QOUT QIN J9 GNDMASH H3 GNDTXVCOD H4 GNDTXVCOB H5 GNDTXVCOG1 H...

Page 55: ...SAMSUNG Proprietary Contents may change without notice Flow Chart of Troubleshooting This Document can not be used without Samsung s authorization 7 35 ...

Page 56: ...SAMSUNG Proprietary Contents may change without notice This Document can not be used without Samsung s authorization Flow Chart of Troubleshooting 7 36 ...

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