Samsung SGH-E750 service manual

GSM 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

Samsung Electronics Co.,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 applicableInternational and/or domestic law.

ⓒ

SAMSUNG Proprietary-Contents may change without notice

1. Specification

This Document can not be used without Samsung's authorization

1-1

GSM900Phase 1

EGSM 900Phase 2

DCS1800Phase 1 PCS1900

Freq. Band[MHz]Uplink/Downlink

890~915935~960

880~915925~960

1710~17851805~1880

1850~19101930~1990

ARFCN range 1~124 0~124 &975~1023 512~885 512~810

Tx/Rx spacing 45MHz 45MHz 95MHz 80MHz

Mod. Bit rate/ Bi t Per iod

270.833kbps3.692us

270.833kbps3.692us

270.833kbps3.692us

270.833kbps3.692us

Time Slot Per iod/ Frame Period

576.9us4.615ms

576.9us4.615ms

576.9us4.615ms

576.9us4.615ms

Modulat ion 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 0pcl ~ 15pcl

Sensi t ivi ty -102dBm -102dBm -100dBm -100dBm

TDMA Mux 8 8 8 8

Cel l Radius 35Km 35Km 2Km -

1-1. GSM General Specification


Specification


1-2

TX Powercontrol level

GSM900

5 33±3 dBm

6 31±3 dBm

7 29±3 dBm

8 27±3 dBm

9 25±3 dBm

10 23±3 dBm

11 21±3 dBm

12 19±3 dBm

13 17±3 dBm

14 15±3 dBm

15 13±3 dBm

16 11±5 dBm

17 9±5 dBm

18 7±5 dBm

19 5±5 dBm


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


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

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


2. Circuit Description

2-1


2-1. SGH-E750 RF Circuit Description

2-1-1. RX PART

- FEM(MODULE100) → Switching Tx, Rx path for GSM900, DCS1800 and PCS1900 by logic controlling.

- FEM Control Logic (MODULE100) → Truth Table

VC1 VC2 VC3

Tx Mode (GSM900) H L L

Tx Mode (DCS1800/1900) L H L(H)

Rx Mode (GSM900) L L L

Rx Mode (DCS1800) L L L

Rx Mode (PCS1900) L L H

- VC-TCXO-2146C6(26MHz) (OSC100)

This module generates the 26MHz reference clock to drive the logic and RF.

It is turned on when the supply voltage is applied.

After buffering a reference clock of 26MHz is supplied to the other parts 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 gain amplifier with baseband filter for IQ chains, RF synthesizer, a I/Q modulator, offset PLL, IF

synthesizer, and the circuits which are needed polar loop architecture for the transmitter.

2-1-2. TX PARTTransmitter of the transceiver is capable of GMSK and 8-PSK modulation, providing support for conventional GSM and

GPRS. The modulated signal out of the transceiver is fed into Power Amplifer Module(U101). PAM output signal is

radiated to the air through FEM(MODULE1) and antenna.


Circuit Description

2-2


2-2. Baseband Circuit description of SGH-E750

2-2-1. PCF50603 (U405)

- Power Management

Eight low-dropout regulators designed specifically for GSM applications power the terminal and help ensure optimal

system performance and long battery life. A programmable boost converter provides support for 1.8V, 3.0V SIMs,

while a self-resetting, electronically fused switch supplies power to external accessories.

Ancillary support functions, such as RTC module and High Voltage Charge pump, Clock generator, aid in reducing

both board area and system complexity.

I2C BUS serial interface provides access to control and configuration registers. This interface gives a microprocessor

full control of the PCF50603 and enables system designers to maximize both standby and talk times.

Supervisory functions. including a reset generator, an input voltage monitor, and a temperature sensor, support reliable

system design. These functions work together to ensure proper system behavior during start-up or in the event of a

fault condition(low microprocessor voltage, insufficient battery energy, or excessive die temperature).

- Backlight Brightness Modulator

The Backlight 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. LCD ConnectorLCD is consisted of main MAIN LCD, SUB LCD

Chip select signals in the U305, LCD_CS, can enable LCD. BACKLIGHT signal enables white LED of main LCD. These

signal is from U400.

16-bit data lines(LD(0)~LD(15)) transfers data and commands to LCD. Data and commands use "RS" signal. If this signal

is high, Inputs to LCD are commands. If it is low, Inputs to LCD are data. The signal which informs the input or output

state to LCD, is required. But this system is not necessary this signal. So "L_WR" signal is used to write data or

commands to LCD. Power signals for LCD are "VDD_IO_HIGH".

2-2-3. KeyThis is consisted of key interface pins KEY_ROW(0:4) and KEY_COL(0:4) in PCF5213EL1. These signals compose the

matrix. Result of matrix informs the key status to key interface in the PCF5213EL1. Power on/off key is seperated from

the matrix. So power on/off signal is connected with PCF50603 to enable PCF50603. Key LED is consisted of six white

LEDs for sub key and eight white LEDs for main key.

Main and Sub key LED use the 3.3V LDO for a supply voltage. KEY_LED_ON signal enables eight white LED.


Circuit Description

2-3


2-2-4. EMI ESD FilterThis system uses the EMI ESD filter, U500 to protect noise from IF CONNECTOR part.

2-2-5. IF connetorIt is 18-pin connector. They are designed to use VBAT, V_EXT_CHARGE, USB_D+, +VBUS, USB_D-, TXD1, RXD1,

AUX_ON, EXT1, EXT2 and GND. They connected to power supply IC, microprocessor and signal processor IC.

2-2-6. Battery Charge ManagementA complete constant-current/constant-voltage linear charger for single cell lithium-ion batteries.

If TA connected to phone, "V_EXT_CHARGE" enable charger IC and supply current to battery.

When fault condition caused, "CHG_ON" signal level change low to high and charger IC stop charging process.

2-2-7. AudioHFR_P and HFR_N from PCF5213EL1 are connected to the main speaker via analog switches. MIC_P and MIC_N

are connected to the main MIC as well. YMU765 is a synthesizer LSI for mobile phones. This LSI has a built-in speaker

amplifier for outputting sounds that are used by mobile phones in addition to game sounds and ringing melodies that are

replayed by a synthesizer.

There is Stereophonic analog output for Headphone.

2-2-8. MemoryThis system uses Samsung'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 is fallen to low and it enables writing process to operate. During reading process,

OEn is fallen to low and it enables reading process to operate. Each chip select signals in the PCF5213EL1 choose

different memories.

2-2-9. PCF5213EL1The PCF5213EL1 is mainly composed of embeded DSP and ARM core. The DSP subsystem includes the Saturn

DSP core with embedded RAM and ROM, and a set of peripherals. It has 24kx16 bits PRAM, 104k*16 bits,

32k*16 XYRAM and 63k*16 XYROM in the DSP.

The ARM946E-S consists of an ARM9E-S processor core, 8 kbyte instruction cache and 8 kbyte data cache,

tghtly-coupled ITCM(Instruction Tightly Coupled Memory) and DTCM(Data Tightly Coupled Memory) memories, a

memory protection unit, and an AMBA(Advanced Microcontroller Bus Architecture) AHB(Advanced

High-performance Bus) bus interface with a write buffer.

HD(0:15), data lines and HA(0:23), address lines are connected to KBJ10KB00M (memory), MV319DNQ (image dsp)

and YMU765 (melody IC). It has 64 kbyte SC RAM (0.5 Mbit) and 32 kbyte SC program ROM for bootstrap

loader in the ARM core.


Circuit Description

2-4


HD(0:15), data lines and HA(0:23), address lines are connected to memory and YMU765 to communicate.

MV319DNQ(Camera DSP Chip) controls the communication between ARM core and DSP core.

OEn, WEn control the access of memory. KROW, and KCOL recognize the key string input status.

It has J-TAG control pins (TDI/TDO/TCK) for ARM and DSP core. J-SEL signal controls different access to ARM

and DSP core.

ADC(Analog to Digital Convertor) receives the condition of temperature, battery type and battery voltage.

2-2-10. TOH2600DGI4KRA(26MHz)This system uses the 26MHz TCXO, VC-TCXO-214C6.AFC control signal form PCF5213EL1 controls 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 graphic memory by processing the sensor output data according to the

handset's command. It can save the raw RGB data up to VGA resoultion into its image buffer and allows the

host processor to download with scalable sized compressed data.

It utilizes 16 bit data bus for communication with the main processor, including bus interface types.

2-2-12. KXP74KXP74 is Tri-axis Orthogonal accelerometers and inclinometers.

The KXP74 utilizes an onboard Serial Peripheral Interface (SPI) for digital communication.

PCF5213EL1 apply KXP74 for G- button and game

SAMSUNG Proprietary-Contents may change without notice3-1


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

QCA02QMI01

QCA01

QAN02

QRF01

QCK01

QCW01

QCR07

QBA01

QCR06

QHI01

QRF03

QIF01


Exploded view and Part List

3-2


3-2. Parts List

Location No Description Sec Code

QAN02 　 INTENNA-SGHE750;IGT-0061,SGH-E750,18 GH42-00633A

QBA01 　 BATTERY-1000MAH,SIL,EU,M;BST4468SE,S GH43-01986A

QCA01 　 UNIT-CAMERA;SPH-E750,MOMFH342G1A,-,E GH59-02258A

QCA02 　 UNIT-CAMERA KEY;SGH-E750,-,-,EU,5V,1 GH59-02232A

QCK01 　 MEC-CAMERA KEY;SGH-E750,EU,-,-,-,-,W GH75-08044A

QCR06 　 SCREW-MACHINE;PH(PI2.5),+,M1.4,L3.5, 6001-001155

QCR07 　 SCREW-MACHINE;CH,+,M1.7,L4,ZPC(BLK), 6001-001691

QFU01 　 MEC-FOLDER UPPER;SGH-E750,EU,-,-,-,- GH75-07644A

QKP01 　 MEC-KEYPAD(SER);SGH-E750,SER,-,-,-,- GH75-07651A

QLC01 　 LCD-SGHE750 MODULE;UF-17E107-A,SGH-E GH07-00760A

QME01 　 UNIT-METAL DOME;SGH-E750,-,-,EU,3.5V GH59-02331A

QME03 　 UNIT-KEY FPCB;SGH-E750,YWCE750,-,EU, GH59-02280A

QMI01 　 MICROPHONE-ASSY-SGHE750;2,130~500uA, GH30-00207A

QMO01 　 MOTOR DC-SGHZ130;DMJBRK20NZ,SGH-Z130 GH31-00153J

QMP01 　 PBA MAIN-SGHE750;SGH-E750,XET,EU,PBA GH92-02273A

QMW02 　 PCT-MAIN WINDOW;SGH-E750,ACRYL,TRP,- GH72-22356A

QRF01 　 PMO-RF COVER;SGH-E750,URETHANE+PC(K2 GH72-22324A

QSC14 　 PMO-FOLDER SCREW COVER;SGH-E750,POLY GH72-24658A

QSP01 　 SPEAKER;0.8W,8ohm,89B±2dB,800Hz,19. 3001-001795

QVK01 　 UNIT-VOLUME KEY;SGH-E750,-,-,EU,5V,1 GH59-02231A

QVO01 　 MEC-VOLUME KEY;SGH-E750,EU,-,-,-,-,W GH75-07962A

QVO08 　 NDC-KEY MODE BRACKET;-,SGH-E750,ZN D GH71-05082A

QFR01 　 MEC-FRONT COVER;SGH-E750,EU,-,-,-,-, GH75-07641A

　 QIF01 PMO-IF COVER;SGH-E750,URETHANE+PC(K2 GH72-22315A

　 QRF03 PMO-EAR COVER;SGH-E750,URETHANE+PC(K GH72-22316A

　 QMI03 RMO-MIC HOLDER;SGH-E750,SLICON RUBBE GH73-05134A

QFL01 　 MEC-FOLDER LOWER;SGH-E750,EU,-,-,-,- GH75-07643A

　 QHI01 MEC-HINGE;SCH-S400,SKT,-,-,-,-,-,- GH75-07998A

QRE01 　 MEC-REAR COVER;SGH-E750,EU,-,-,-,-,B GH75-07642A

　 QCW01 MEC-CAMERA DECO;SGH-E750,EU,-,-,-,-, GH75-07646A



3-3


Description Sec Code

BAG PE;LDPE,T0.05,W80,L180,TRP,-,- 6902-000634

CBF INTERFACE-DATA LINK CABLE;SGH-D5 GH39-00371A

ADAPTOR-SGHD500 BLK;TAD137EBE,SGH-D5 GH44-00954A

S/W CD-PC LINK CD;SGH-D500,SGH-D500, GH46-00127A

UNIT-EARPHONE;SGH-C230,EM-SS550E-STB GH59-02166A

SPRING ETC-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;SGH-E730,#95 GH74-15350A

MPR-FOLDER SHEET;SGH-E750,PC SHEET,5 GH74-16514A

MPR-SHEET FPC MODE KEY;SGH-E750,PC S GH74-16523A

MPR-BOHO VINYL M/WIN ADD;SGH-E750,3M GH74-16525A

MPR-BOHO VINYL MAIN WIN;SGH-E750,ST- GH74-16526A



3-4


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)


4. Electrical Parts List

4-1


Design LOC Description SEC CODE

ANT102 ANTENNA-CHIP 4202-001066

C100,C102,C103,C111 C-CERAMIC,CHIP 2203-000812

C101,C108,C112 C-CERAMIC,CHIP 2203-001259



C116 C-TA,CHIP 2404-001348

C117 C-CERAMIC,CHIP 2203-006190



C121,C143 C-CERAMIC,CHIP 2203-000654

C122,C126 C-TA,CHIP 2404-001374



C125,C426 C-CERAMIC,CHIP 2203-000585













C300,C620 C-CERAMIC,CHIP 2203-000254











C415,C506,C509 C-TA,CHIP 2404-001268




C510,C614 C-CERAMIC,CHIP 2203-000628

C600,C609 C-TA,CHIP 2404-001402


C602,C608 C-CERAMIC,CHIP 2203-000995


C616,C617 C-CERAMIC,CHIP 2203-000854





Electrical Parts List

4-2





C712,C713 C-CERAMIC,CHIP 2203-006423

C714,C715 C-CERAMIC,CHIP 2203-005065




CN100 CONNECTOR-COAXIAL 3705-001242

CN500 CONNECTOR-SOCKET 3710-001994

CN501 CONNECTOR-HEADER 3711-005781

CN601 JACK-PHONE 3722-002010



D500 DIODE-ZENER 0403-001427

F101 FILTER-EMI SMD 2901-001254

L101 INDUCTOR-SMD 2703-002170


L104,L105,L109,L110 INDUCTOR-SMD 2703-002365





L400 CORE-FERRITE BEAD 3301-001120


L402,R103,R113,R118 R-CHIP 2007-000171



LED700,LED701,LED702 LED 0601-002055

LED703,LED704,LED705 LED 0601-002055

LED706,LED707,LED708 LED 0601-002055

LED709,LED710,LED711 LED 0601-002055

LED712,LED713,LED715 LED 0601-002055

LED717,LED718,LED719 LED 0601-002055

LED720,LED721,LED722 LED 0601-002055

LED723 LED 0601-002055

MODULE1 FILTER 2911-000007

OSC100 OSCILLATOR-VCTCXO 2809-001281

OSC400 CRYSTAL-UNIT 2801-004373

Q100,Q101,Q102,Q103 TR-DIGITAL 0504-001151

Q500 TR-DIGITAL 0504-001151

Q700 ;SI1902DL 0505-001469

R100,R101,R102,R104 R-CHIP 2007-000162

R105 R-CHIP 2007-000173

R108,R200,R307,R505 R-CHIP 2007-000148

R110,R117 R-CHIP 2007-000138

R120,R126,R127,R135 R-CHIP 2007-000171

R121,R125 R-CHIP 2007-007014

R122,R124,R128,R131 R-CHIP 2007-000170

R123 R-CHIP 2007-001303

R201,R208,R300,R308 R-CHIP 2007-000171



4-3



R203,R204,R600,R603 R-CHIP 2007-000242

R205 R-NETWORK 2011-001394

R206 R-CHIP 2007-000143

R301 R-CHIP 2007-001325

R303,R306,R404,R501 R-CHIP 2007-000162

R309,R318,R403,R407 R-CHIP 2007-000171

R400 R-CHIP 2007-007592

R401,R512 R-CHIP 2007-007334

R402 R-CHIP 2007-007100

R408,R518,R519,R520 R-CHIP 2007-000171

R409,R604,R608 R-CHIP 2007-002796

R500,R502 R-CHIP 2007-000758

R503,R504,R609,R700 R-CHIP 2007-000162

R506 R-CHIP 2007-000152

R507 C-CERAMIC,CHIP 2203-005061

R508,R509 R-CHIP 2007-000170

R510,R611 R-CHIP 2007-007573

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 2007-000162

R721,R722 R-CHIP 2007-007317

R730 R-CHIP 2007-000171

R731,R732,R733,R734 R-CHIP 2007-002970

R790,R791 R-CHIP 2007-002970

SIM400 CONNECTOR-CARD EDGE 3709-001384

U100 IC 1205-002709

U101 IC 1201-002223

U103,U303 IC 0801-002237

U200 IC 1205-002647

U300 COMP-SMD GH13-00030A

U301 MEMORY 1108-000022

U302 IC 1204-002138

U304 IC 1209-001618

U306 IC 0801-002882

U400 IC 1203-003767

U401 IC 1203-002837

U402 IC 1203-003787

U404 BATTERY 4302-001177

U405 IC 1203-003568

U500 DIODE-TVS 0406-001188



4-4



U501,U700 IC 1203-003737

U502 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 0406-001203

SAMSUNG Proprietary-Contents may change without noticeThis Document can not be used without Samsung's authorization

5. Block Diagrams

5-1

5-1. RF Solution Block Diagram


Block Diagrams


5-2

5-2. Base Band Solution Block Diagram


6. PCB Diagrams

6-1


6-1. PCB Top Diagram


PCB Diagrams

6-2


6-2. PCB Bottom Diagram


7. Flow Chart of Troubleshooting


7-36

7-1. Power On

Yes

Yes

Check the initial operation

Yes

No Check the clock generation circuit

(related to U100)

Check for the clock at C303

= 26MHz

Check the +VDD_GSM_CORE circuitC402(+VDD_GSM_CORE)

= 1.8V?

No

C430(+VDD_IO_LOW) &C429(+VDD_IO_HIGH) = "H"?

Yes

NoResolder OSC400

Check the Clock at

R402=32KHZ

Yes

NoChange the PMU (U405)

Yes

No

END

Change the Battery

' Power On ' does not work

Check the Battery Voltage

is more than 3.4V

Yes


Flow Chart of Troubleshooting

7-2

SIM_VC

C

SIM_C

LK

SIM_R

ST

Backup_B

attery

DC

/DC

Dow

n Conveter(1.8Volt)

SIM_IO

2.3T SIM

R400

C425

C411

C413

L401

C415

R404

GN

D2

MO

DE

61R

UN

3SW

VFB5

VIN4

R408

U401

+VDD

_IO_LO

W

R402

C412

V400

C414

R407

C429

NEG2

POS1

C418

U404

C424

L400

C419

C430

C416

C426

C403

C427

R409

R403

TP400

C420

C402

C421

C410

C428

C422

C423

C405

L402

C417

NC

910

NC

VCC

12R

ST

VCC

5

5000-6P-2.3M

SIM400

CLK

34G

ND

IO67

NC

NC

8

R401

OSC

400

21

44

_SIMRSHC

7 32

VINT

29VSAVE

30

_IRQ

10

_ONKEY

27

_REC1

1

_REC

213

_RSTHC11

_SIMR

SCD

SIMCKHC

8

SIMD

3VBA

T40

SIMEN

45

SIMIO

CD

42

SIMIOHC

9

SIMVC

C41

VBAT

31VCHG

28

RF12VB

AT

2322R

F1VDD

RF2VD

D24

SCL

2

SCN

38

SCP

37

SDA

3

SIMC

KC

D43

MICBIAS

12

NC

5354N

C

OSCI

26

OSCO

25

PWREN1

6 PWREN2

5REFC

48

GPO

247

GPO

346

18H

CVB

AT

HC

VDD

17

IOD

2VBA

T1514

IOVD

D

20LPD

1VBA

T

LPVDD

19

D1VD

D2116

D2VD

D

D3VD

D39

GN

D4950

GN

DG

ND

5152G

ND

GPO

1

U405

CHGCUR/BATMAX

34

CHGDRV

33

CLK32K

4

CPVBAT

36

CPVDD

35

C404

VBA

T+VD

D_G

SM_C

OR

E

REF_O

N+VD

D_IO

_LOW

IT_PMU

ON

KEYN

AU

X_ON

RSTO

N

SIMR

ST

+VDD

_RX_TX

+VCC

_SYN

+VDD

_IO_H

IGH

BU

_RST

32KH

z_DIG

IT

+VDD

_G_A

VDD

_SLEEP

VBA

T

+AVD

D_H

FA

+VDD

_IO_LO

W

+AVD

D

MIC

_BIA

S

REF_O

N

PON

_TX

SCLSD

A

SIMC

LK

SIMIO




7-3



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

NoCheck the U200

Check the 16bit data signal

Yes

Yes

Check the Battery Voltage

is more than 3.4V

NoChange the Battery

Yes

No

Check U405 pin 4 : 32MHz

Change the PMU




7-5



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

NoCheck 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




7-7

BATTERY CHARGING

R512

VBAT

R514

C504

3 _PPR

11GND

GND 8

9ICDL

6IMIN

USB2

USBON 7_CHG4

_EN5

U503

BAT 10CRDL

1ZD500

R510

C503

C506

C507

+VDD_IO_HIGH

C505

R511

R513

D500

END_OF_CHG

CHG_ON

AUX_ON

MES_BATTV_EXT_CHARGE

+VBUS

USB_CHG_ON



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 PBAAfter SIM card insert,

SIM400 pin 2 = "H(SIM_RST)"?

Yes




7-9

SIM_VCC

SIM_CLK

SIM_RST

Backup_Battery

SIM_IO

2.3T SIM

C425

C411

C413

C415

R404100K

R408

+VDD_IO_LOW

R402

C412

V400

C414

R407

C429N

EG2

POS

1

10V1000nFC418

U40

4

C424

C419

C430

C416

C426

C427

510R409

R403

TP400

C420

C421

C410

C428

C422C423

L402

C417

NC9

10 NC

VCC12 RST

VCC5

5000-6P-2.3M

SIM400

CLK34 GND

IO67 NC

NC8

OSC400

21

44

_SIM

RS

HC

7

32

VIN

T

29

VSA

VE

30

_IR

Q

10

_ON

KEY

27

_REC

1

1

_REC213_R

STH

C

11

_SIMRSCD

SIM

CK

HC

8

SIMD3VBAT 40

SIMEN 45

SIMIOCD 42

SIM

IOH

C

9

SIMVCC 41

VBA

T

31

VCH

G

28

RF12VBAT23

22 RF1VDD

RF2VDD24

SCL

2

SCN 38

SCP 37

SDA

3

SIMCKCD 43

MIC

BIA

S

12

NC 5354NC

OSC

I26

OSC

O

25

PWR

EN1

6

PWR

EN2

5

REF

C

48

GPO2 47

GPO3 46

18 HCVBAT

HCVDD17

IOD2VBAT15

14 IOVDD

20 LPD1VBAT

LPVDD19

D1VDD21

16 D2VDD

D3VDD 39

GND 4950GND

GND 5152GND

GPO1

U405

CH

GC

UR

/BA

TMA

X

34

CH

GD

RV

33

CLK

32K

4

CPV

BA

T

36

CPV

DD

35

IT_PMU

ONKEYN

AUX_ON

RSTON

SIMRST

+VDD_RX_TX

+VCC_SYN

+VDD_IO_HIGH

BU_RST

32KHz_DIGIT

+VDD_G_A

VDD_SLEEP

VBAT

+AVDD_HFA

+VDD_IO_LOW

+AVDD

MIC_BIAS

REF_ON

PON_TX

SCL

SDA

SIMCLK

SIMIO



7-10

7-5. Microphone Part

Replace the MICNo

Check the MIC

Yes

Microphone does not work

Check the JACK_EN signalNoCheck 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 fromMIC,




7-11

MAIN_MIC

Close to MCP

Close to microphone

C602

C606

R603

C605 R602

R600

C604

C607ZD600

1 2 3

456

C608

MIC_BIAS

C603

R604

MIC600

C600C601

MIC_CP

MIC_N

MIC_P



7-12

7-6. Speaker Part(Melody)

Check the U302Pin 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 LCDconnector(CN700)PIN 37, 38

Resolder CN700

No

Yes

No

END

Check speakerSPK+, SPK-= Operate

Replace SPK

Yes

Yes

Check LCD Module Replace LCD Module

No

Yes




7-13

C306

R301

+VDD_IO_LOW

C303

C308

C307

C315

C304

+VDD_IO_HIGH

C311

C305 9VREF

8 VSS

/CS

29

3

/IRQ

/RD

31

/RST

4

28/W

R

5NC

PLLC6

17SPOUT1SPOUT2

18

15

SPVD

D

16

SPVS

S

7VDD

G3334

GG

35 36GH

POU

T-L/

MO

NO

10 11

HPO

UT-

R

IOVD

D

32

LED2

19MTR

24

23D4

D522

21D6

D720

EQ1

12 13

EQ2

EQ3

14

U302

30

A0

1CLKI

D0

27 26

D1

25D2

D3

HD(1)

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

C72

0

C71

8

C72

4

+VDD_IO_HIGH

C72

8

C70

8C

722

C70

9

VBAT

C72

1

C72

9

C70

5

C70

6

C70

7C713 C

710

C71

1

C71

9

C72

6

C72

7

C72

5

C712

8 89

9

3939

4 4

40404141 4242

5 566

7 7

3131 32323333 34343535 36363737 3838

2323 24242525 26262727 28282929

3 3

3030

16 1617 17 18 1819 19

22

20 202121 2222

1 1

1010

11 11 12 1213 13 14 1415 15

CN700

C70

4

C72

3

LCD_BL_ON

L_WR

LD(3)LD(4)LD(5)LD(6)LD(7)LD(8)LD(9)LD(10)LD(11)LD(12)LD(13)LD(14)LD(15)

HFR_PVIB

LD(0)LD(1)

LED_REDLED_GREEN

LED_BLUE

AMP_EN

MELODY_SEL

LD(2)

RS

LCD_MAIN_CS

HFR_N

LCD_SUB_CS

KEY_COL(0)

OLED_EN

KEY_ROW(4)



7-14




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



7-16

CAMERA_KEY

End_Key

VOLUME_KEYV7

02

4GND

5GND1

3V_COMMON

V_DOWN2

1V_UP

NEW_VOLUM_KEY2

VOL700

V703

END12

V705ZD

701

NEW_VOLUM_KEY_1

VOL701

3GND

1IN

2OUT

ZD70

3

ZD70

2

V704

V701

KEY_ROW(3)

KEY_ROW(4)

KEY_COL(1)

KEY_COL(0)

ONKEYN

KEY_ROW(3)




7-17



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 MODULESPK +,- PAD = 1.5V?

Change the LCD Module

No

Yes

No

Resolder CN700

Yes

Check LCD connectorCN700 pin 37, 38




7-19

VBAT

Y13

16 Y0

Y115

Z

2

Z0

3

Z1

1

_EN

A

4

GND

NC 5

NC

1819

NC

VCC14

12

X

10

X0X1

11

NLAS4783

U600

9

A

8B

7C

GND 6

17

EARSPK_L

EAR

SPK

_CO

M

EAR_MUTE

EAR

SPK

_R

EAR

1

EAR2

HFR

_N

C72

0

C71

8

C72

4

+VDD_IO_HIGH

C72

8

C70

8C

722

C70

9

VBAT

C72

1

C72

9

C70

5

C70

6

C70

7C713 C

710

C71

1

C71

9

C72

6

C72

7

C72

5

C712

8 89

9

3939

4 4

40404141 4242

5 566

7 7

3131 32323333 34343535 36363737 3838

2323 24242525 26262727 28282929

3 3

3030

16 1617 17 18 1819 19

22

20 202121 2222

1 1

1010

11 11 12 1213 13 14 1415 15

CN700

C70

4

C72

3

LCD_BL_ON

L_WR

LD(3)LD(4)LD(5)LD(6)LD(7)LD(8)LD(9)LD(10)LD(11)LD(12)LD(13)LD(14)LD(15)

HFR_PVIB

LD(0)LD(1)

LED_REDLED_GREEN

LED_BLUE

AMP_EN

MELODY_SEL

LD(2)

RS

LCD_MAIN_CS

HFR_N

LCD_SUB_CS

KEY_COL(0)

OLED_EN

KEY_ROW(4)



7-20




7-21

7-9. Back Light (for Color Main LCD)

Is LCD Contrast set onhigh 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



7-22




7-23

7-10. Key Back Light

U700 pin 3, 6 = "H"? Check the U200 related to "KEY_LED_ON"

END

No

Yes

Yes

Main Key LED does not work

R71256

R71156

VOUT

56R710

U700CE6

GND25 GND

NC4

VDD 1

3

LED710

56R704

LED706

56R727

LED713 LED715

10V1000nFC702 R791

LED723

56R79056

LED722

56R706 R714

56

LED711LED701

R70956 56

R713

LED719LED718

R70356 56

R729

LED717LED712LED703LED704

56R705

LED702

56R708

LED700 LED708LED707

R7345656

R733

LED721

R70156 56

R731R70256

R70756 56

LED720

VBAT

R732

LED709LED705

KEY_LED_ON



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 I²C)

CN 704 Pin 1, 20 = 2.8V?

Yes

No

Replace the Camera Module

Check the camera module Change the PBA

No

Yes




7-25

SIM_VCC

SIM_CLK

SIM_RST

Backup_Battery

SIM_IO

2.3T SIM

C425

C411

C413

C415

R404100K

R408

+VDD_IO_LOW

R402

C412

V400

C414

R407

C429

NEG

2PO

S1

10V1000nFC418

U40

4

C424

C419

C430

C416

C426

C427

510R409

R403

TP400

C420

C421

C410

C428

C422C423

L402

C417

NC9

10 NC

VCC12 RST

VCC5

5000-6P-2.3M

SIM400

CLK34 GND

IO67 NC

NC8

OSC400

21

44

_SIM

RS

HC

7

32

VIN

T

29

VSA

VE

30

_IR

Q

10

_ON

KEY

27

_REC

1

1

_REC213

_RST

HC

11

_SIMRSCD

SIM

CK

HC

8

SIMD3VBAT 40

SIMEN 45

SIMIOCD 42

SIM

IOH

C

9

SIMVCC 41

VBA

T

31

VCH

G

28

RF12VBAT23

22 RF1VDD

RF2VDD24

SCL

2

SCN 38

SCP 37

SDA

3

SIMCKCD 43

MIC

BIA

S

12

NC 5354NC

OSC

I26

OSC

O

25

PWR

EN1

6PW

REN

25

REF

C

48

GPO2 47

GPO3 46

18 HCVBAT

HCVDD17

IOD2VBAT15

14 IOVDD

20 LPD1VBAT

LPVDD19

D1VDD21

16 D2VDD

D3VDD 39

GND 4950GND

GND 5152GND

GPO1

U405

CH

GC

UR

/BA

TMA

X

34

CH

GD

RV

33

CLK

32K

4

CPV

BA

T

36

CPV

DD

35

IT_PMU

ONKEYN

AUX_ON

RSTON

SIMRST

+VDD_RX_TX

+VCC_SYN

+VDD_IO_HIGH

BU_RST

32KHz_DIGIT

+VDD_G_A

VDD_SLEEP

VBAT

+AVDD_HFA

+VDD_IO_LOW

+AVDD

MIC_BIAS

REF_ON

PON_TX

SCL

SDA

SIMCLK

SIMIO

1.3M 1/4 LSI Senser(0.9T)

667 78 8

99

27GG

28

222223 2324 2425 252626

3 34 455

15 1516 1617171818

19 19

22

20 202121

CN70411

101011 1112 12

13131414

CAM1.5V

R72

1

L701

CAM2.8V

CAM2.8V

R72

2

+VDD_IO_HIGH

R73

0

Y(5)

PCLK

Y(7)

Y(6)

Y(0)

Y(2)

M_SCLMCLKM_SDAS_RESET

FVALIDLVALID

FLASH_OUT

Y(1)

Y(3)

Y(4)



7-26




7-27

7-13. BLUETOOTH

BLUETOOTH does not work

Yes

R126 = 'H'

No

Check the U200

Yes

Replace ANT102

No

Replace U703

Yes

END




7-28

7-13. GSM Receiver

Module1 pin8>= -65dBm Resolder CN100, C103

No

Yes

RX ONRF input : 62CH

Amp : -50dBm

Check Module1pin9,pin10,pin12 = L

Module1 pin1, pin2>= -65dBm

Check ANT Switchcontrol circuit

Resolder Module1

Yes

Yes

No No

END

U100 H7,H8,J7,J8>= 1V

U100E1 >= -70dBmF1 >= -70dBm

Resolder C108, C112, L107

Check U100J2,A6,B6,A9,E9>=2.7V

Check & ResolderU100, R117

RF26MHz, RF PSU Part

Resolder U100

C142, C146>= 1V

Yes

Yes

Yes

Yes

Yes

No

No No

Check U200




7-29

7-14. GSM Transmitter

Module1 Pin8>= 20dBm

Resolder CN100, C103

TX ON (5Level)

Check Module1pin10 = H (2.68V),pin9, pin12 = L

Module1 pin11>= 18dBm

U101 pin8>= 18dBm

U101 7pin>= -11dBm

Change or ResolderModule1


Resolder R122, L106

Yes

Check U101+VBAT, pin4, pin6

OK?Resolder or Change U101

Check +VBAT or U101control signal

No

No

No

No

Yes

Yes

Yes

Yes

Yes

No

Yes

No

NoNoCheck & ResolderU100, R117



U100 H7,H8,J7,J8>= 1V

YesYesResolder U100

Check U200

END



7-30

7-15. DCS Receiver

Module1 Pin8>= -65dBm Resolder CN100, C103

No

Yes


Amp : -50dBm

Check Module1pin9,pin10,pin12 = L


U100D1 >= -70dBmC1 >= -70dBm


Resolder Module1

Resolder C105, C106, L104, L105

Yes

Yes

Yes

No

No

No

END

U100 H7,H8,J7,J8>= 1V




Resolder U100

C142, C146>= 1V

Yes

Yes

Yes

Yes

No No

Check U200




7-31

7-16. DCS Transmitter

Module1 pin8>= 20dBm Resolder CN100, C103

TX ON (0Level)



U101 pin9>= 18dBm

U101 pin1>= -11dBm



Resolder C109, L108, C113

Yes




No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

No

Yes

U100 H7,H8,J7,J8>= 1V



Yes

No No

END

Check U200

Resolder U100Yes

Check U100J2,A6,B6,A9,E9

>=2.7VOK?



7-32

7-17. PCS Receiver

Module1 pin8>= -65dBm Resolder CN100, C103

No

Yes


Amp : -50dBm

Check Module1pin9= H

pin10, pin12 = L


U100B1 >= -70dBmA1 >= -70dBm


Resolder Module1

Resolder C114, C115, L109, L110

Yes

YesYes

No

No

No

END

U100 H7,H8,J7,J8>= 1V




Resolder U100

C142, C146>= 1V

Yes

Yes

Yes

Yes

No No

Check U200




7-33

7-18. PCS Transmitter

Module1 Pin8>= 20dBm Resolder CN100, C103

TX ON (0Level)



U101 pin9>= 18dBm

U101 pin1>= -11dBm



Resolder L102, L108, C113

Yes




No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

No

Yes

U100 H7,H8,J7,J8>= 1V

Check & ResolderU100, C147, R117


Yes

No No

END

Check U200

Resolder U100Yes

Check U100J2,A6,B6,A9,E9

>=2.7VOK?



7-34

NC

C142

1M R122

C101

R124

1M

C117

C137

C143

C105

L105

+VCC

_SYN

AN

T100

C115

C135

C104

0.5PF50V

50VC

1361N

F

E1

E24

VBA

T

Q101

B1

25B

2

6C

1

C2

3 1

PEMD

10

L102

C108

C119

R113

R104

3G

ND

2IN N

C1

4O

UT

5VC

C

L101

U103

R112

TP100

R131

1M

C132

0R

135

+VDD

_IO_H

IGH

C147

2

13

R100

F101

AN

T101

C140

C122

C120

C116

E2

C112

2B

15

B2

C1

6

3C

2

E11

4

G1

34 G

2G

3

5G

4

6

1IN

2O

UT

PEMD

10

Q102

CN

100

CR

S5001-1702

+VCC

_SYN

C126

C1

6

3C

2

1E1

4E2

+VDD

_IO_H

IGH

R118

Q100

PEMD

10

2B

15

B2

L107

C123

C127

R121

R108

+VDD

_IO_H

IGH

1PFC

113

50V

2.2nHL108

C125

C106

R120

+VDD

_IO_H

IGH

50V1PF

C107

L110

R127

+VDD

_RX_TX

+VCC

_SYN

7

5PC

S_RX1

PCS_R

X26

VC1

10 12VC

2VC

39

MO

DU

LE18A

NT

3D

CS_R

X1D

CS_R

X24

13D

CS|PC

STX

EGSM

TX11

1EG

SM_R

X1EG

SM_R

X22

G

L109

R102

R117

VDD

_SLEEP

C131

5.6nH

C133

L106

R111

1MR

128

R123

C114

R110

C121

8TXEN

34VB

ATT

VRA

MP

6

1NF

C134

50V

U101

2B

AN

D1

DC

S/PCSIN

9D

CS/PC

SOU

TG

ND

10

5G

ND

7G

SMIN

GSM

OU

T

C124

OU

T3 4

VCC

VCO

N1O

SC100

2G

ND

C100

C102

R125

C111

R103

+VCC

_SYN

0

L103

C148

C110

R101

L104

E1

E24

R107

Q103

PEMD

10

B1

2B

25 6

C1

C2

3 1

C146

NC

C109

NC

J2VC

CO

PLL

J3VC

CTXVC

O

J4TXO

UTD

J5TXO

UTG

J6G

ND

TXVCO

G2

J7IO

UT/IIN

J8Q

OU

T/QIN

J9G

ND

MA

SH

H3

GN

DTXVC

OD

H4

GN

DTXVC

OB

H5

GN

DTXVC

OG

1

H6

VCC

TXVCO

G

H7

IOU

TB/IIN

B

H8

QO

UTB

/QIN

B

H9

LE

J1G

ND

LNA

F8C

LK

F9SD

ATA

G1

GSM

0LNA

IG

SM0G

ND

G2

G8

VCC

MA

SH

G9

CLK

OU

T1

H1

GSM

0LNA

IB

H2

GN

DO

PLL

D8

DIVO

N

D9

CLK

OU

T2

E1G

SM1LN

AI

E2G

ND

E8G

ND

CLK

E9VC

CC

LK

F1G

SM1LN

AIB

F2G

SM1G

SM0G

ND

B9

TCXO

IN

C1

DC

SLNA

I

C2

PCSD

CSG

ND

C3

GN

D

C8

CLK

2CO

NT

C9

GN

DB

UF2

D1

DC

SLNA

IB

D2

DC

SGSM

1GN

D

B1

PCSLN

AIB

B2

PCSG

ND

B3

VCC

MIX

B4

CA

PIB

B5

CA

PQB

B6

VCC

RFVC

O

B7

GN

DR

FSYN

B8

GN

DB

UF1

A2

GN

D

A3

VCC

LNA

A4

CA

PI

A5

CA

PQ

A6

VCC

RFLO

A7

VCC

BB

A8

VCC

RFSYN

A9

VCC

BU

F

U100

1N

C2

NC

A1

PCSLN

AI

C128

C118

C103

22

R106

R105

D_R

EF_CLK

TXON

PCS_R

X_NPC

S_RX_P

EGSM

_RX_P

EGSM

_RX_N

RX_TX_Q

P

RX_TX_Q

N

RX_TX_IP

RX_TX_IN

VC2

VC1

26M_D

IGIT

DC

S_RX_P

RF_C

LK

RF_D

ATA

RF_EN

AFC

VC3

J_AN

T

PCS_R

X_P

PCS_R

X_N

DC

S_RX_P

DC

S_RX_N

EGSM

_RX_P

EGSM

_RX_N

DC

S

RA

MP

DC

S_RX_N




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Samsung SGH-E750 service manual

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Transcript of Samsung SGH-E750 service manual