Samsung SGH-I740c Manual de usuario

GSM TELEPHONE

SGH-I740c

1. Safety Precautions

2. Specification

3. Product Function

4. Array course control

5. Exploded View and Parts list

6. MAIN Electrical Parts List

7. Disassembly and Assembly

Instructions

8. Block Diagrams

9. PCB Diagrams

10. Chart of Troubleshooting

11. Reference data

GSM TELEPHONE CONTENTS

efrcom

This Service Manual is aproperty of Samsung Electronics Co.,Ltd.

Any unauthorized use of Manual can be punished under applicable

International and/or domestic law.

Samsung Electronics Co.,Ltd.

2008. 07.Re v.1.0

ⓒ

Country Web Site

North America service.samsungportal.com

Latin America latin.samsungportal.com

CIS cis.samsungportal.com

Europe europe.samsungportal.com

China china.samsungportal.com

Asia asia.samsungportal.com

Mideast &Africa mea.samsungportal.com

GSPN (Global Service Partner Network)

2. Specification

2-1

2-1. GSM General Specification

GSM850

Phase 1

EGSM 900

Phase 2

DCS1800

Phase 1 PCS1900

Freq.

Band[MHz]

Uplink/Downlink

824~849

869~894

880~915

925~960

1710~1785

1805~1880

1850~1910

1930~1990

ARFCN range 128~251 0~124 &

975~1023 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~5dBm 33dBm~5dBm 30dBm~0dBm 30dBm~0dBm

Power Class 5pcl ~ 19pcl 5pcl ~19

pcl 0pcl ~15

pcl

Sensitivity -102dBm -102dBm -100dBm -100dBm

TDMA Mux 8 8 8 8

Cell Radius 35Km 35Km 2Km 2Km

Specification

2-2

2-2. GSM Tx Power Class

TX Power

control

level

GSM850

533±2

dBm

631±2

dBm

729±2

dBm

827±2

dBm

925±2

dBm

10 23±2 dBm

11 21±2 dBm

12 19±2 dBm

13 17±2 dBm

14 15±2 dBm

15 13±2 dBm

16 11±3 dBm

17 9±3dBm

18 7±3 dBm

19 5±3 dBm

TX Power

control

level

EGSM900

533±2

dBm

631±2

dBm

729±2

dBm

827±2

dBm

925±2

dBm

10 23±2 dBm

11 21±2 dBm

12 19±2 dBm

13 17±2 dBm

14 15±2 dBm

15 13±2 dBm

16 11±3 dBm

17 9±3dBm

18 7±3 dBm

19 5±3 dBm

TX Power

control

level

DCS1800

030±3

dBm

128±3

dBm

226±3

dBm

324±3

dBm

422±3

dBm

520±3

dBm

618±3

dBm

716±3

dBm

814±3

dBm

912±4

dBm

10 10±4 dBm

11 8±4 dBm

12 6±4 dBm

13 4±4 dBm

14 2±5 dBm

15 0±5 dBm

TX Power

control

level

PCS1900

030±3

dBm

128±3

dBm

226±3

dBm

324±3

dBm

422±3

dBm

520±3

dBm

618±3

dBm

716±3

dBm

814±3

dBm

912±4

dBm

10 10±4 dBm

11 8±4 dBm

12 6±4 dBm

13 4±4 dBm

14 2±5 dBm

15 0±5 dBm

SAMSUNG Proprietary-Contents may change without notice

3. Product Function

3-1

This Document can not be used without Samsung's authorization

Main Function

-Slim Bar Design 2.5G MITS

-3.0Megapixel Camera

-2.8"QVGA 262K Color TFT Screen

-External Memory microSD (T-Flash)

-Video Recording &Messaging

-Music Player(MP3/AAC/AAC+)

-FM Radio Support

-A-GPS Support

-Bluetooth Wireless Technology V2.0+EDR

-Multimedia Message Service (MMS) /SMS /E-mail

-Voice recorder

-Speaker Phone

-Java MIDP 2.0/ WAP2.0

-GSM/GPRS Class 10

-Quad-band(850/900/1800/1900MHz)

SAMSUNG Proprietary-Contents may change without notice

11. Reference data

11-1

This Document can not be used without Samsung's authorization

11-1. Reference Abbreviate

AAC:Advanced Audio Coding.

AVC :Advanced Video Coding.

BER :Bit Error Rate

BPSK:Binary Phase Shift Keying

CA :Conditional Access

CDM :Code Division Multiplexing

C/I :Carrier to Interference

DMB :Digital Multimedia Broadcasting

EN :European Standard

ES :Elementary Stream

ETSI:European Telecommunications Standards Institute

MPEG:Moving Picture Experts Group

PN :Pseudo-random Noise

PS :Pilot Symbol

QPSK:Quadrature Phase Shift Keying

RS :Reed-Solomon

SI :Service Information

TDM :Time Division Multiplexing

TS :Transport Stream

SAMSUNG Proprietary-Contents may change without notice

1. Safety Precautions

1-1

This Document can not be used without Samsung's authorization

1-1. Repair Precaution

―Repair in Shield Box, during detailed tuning. Take specially care of tuning or test, because

specipicty of cellular phone is sensitive for surrounding interference(RF noise).

―Be careful to use akind of magnetic object or tool, because performance of parts is damaged by

the influence of magnetic force.

―Surely use astandard screwdriver when you disassemble this product, otherwise screw will be

worn away.

―Use athicken twisted wire when you measure level. Athicken twisted wire has low resistance,

therefore error of measurement is few.

―Repair after separate Test Pack and Set because for short danger (for example an overcurrent

and furious flames of parts etc) when you repair board in condition of connecting Test Pack and

tuning on.

―Take specially care of soldering, because Land of PCB is small and weak in heat.

―Surely tune on/off while using AC power plug, because arepair of battery charger is dangerous

when tuning ON/OFF PBA and Connector after disassembling charger.

―Don't use as you pleases after change other material than replacement registered on SEC System.

Otherwise engineer in charge isn't charged with problem that you don't keep this rules.

SAMSUNG Proprietary-Contents may change without notice

Safety Precautions

1-2

This Document can not be used without Samsung's authorization

1-2. ESD(Electrostatically Sensitive Devices) Precaution

Several semiconductor may be damaged easily by static electricity. Such parts are called by ESD

(Electrostatically Sensitive Devices), for example IC,BGA chip etc. Read Precaution below.

You can prevent from ESD damage by static electricity.

―Remove static electricity remained your body before you touch semiconductor or parts with

semiconductor. There are ways that you touch an earthed place or wear static electricity prevention

string on wrist.

―Use earthed soldering steel when you connect or disconnect ESD.

―Use soldering removing tool to break static electricity. ,otherwise ESD will be damaged by static

electricity.

―Don't unpack until you set up ESD on product. Because most of ESD are packed by box and

aluminum plate to have conductive power,they are prevented from static electricity.

―You must maintain electric contact between ESD and place due to be set up until ESD is

connected completely to the proper place or acircuit board.

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4. Array course control

4-1

This Document can not be used without Samsung's authorization

4-1. Software Adjustments

TEST JIG BOX (GH80-03308A)

RF TEST CAB (GH39-00985A)

TEST CAB (GH39-00993A/GH39-00990A)

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Array course control

4-2

This Document can not be used without Samsung's authorization

4-2. Software Downloading

4-2-1. Pre-requestsfor Downloading

•Downloader Program(QINGDAO DOWNLOADER V0.4.EXE)

•SGH-i740c Mobile Phone

•USB Data Cable of DLC JIG

•UART Data Cable(Serial Cabel) of DLC JIG

•Binary files(

PDA &Phone binary)

4-2-2. S/W Downloader Program

4-2-2-1. Phone S/W Downloading

■Load the binary download program by executing the

“QINGDAO DOWNLOADER V0.4.EXE”

1.Select the connected serial port and the rate of speed

2.Select the file what you want to download

3.Then, click the start button.

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