Samsung SGH-E740S Manual de usuario

GSM TELEPHONE

SGH-E740S

GSM TELEPHONE CONTENTS

1. Safety Precautions

2. Specification

3. Product Function

4. Array course control

5. Exploded View/Disassembly

and Assembly Instructions

6. MAIN Electrical Parts List

7. Block Diagrams

8. PCB Diagrams

9. Flow Chart of Troubleshooting

10. Reference data

Samsung Electronics Co.,Ltd.

2007. 07 Rev.1.0

ⓒ

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.

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)

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1. Safety Precautions

1-1

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1-1. Repair Precaution

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

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

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

the influence of magnetic force.

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

worn away.

―Use a thicken twisted wire when you measure level. A thicken 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 a repair 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.

―Background color for Navi-keys and 3*4 key pad of silver-colouredmoldis'silver'.Duetoits

background color, white LED causes problems in daytime discrimination and brightness uniformity.

By applying Sky-blue LED, advantages both in discrimination and design can be satisfied.

―   

  Print "BLUE LED" on the backside

   Stamp "BLUE LED" on the frontside (see picture attached)

―Colours of SGH-E740(Total of 8): Metal silver, Black dynamic, Light pink, Blue, Hot pink,

Blue green, Yellow green, Emerald green.

―Among above eight, only Metal silver needs Sky-blue LED, while the rest stay with White LED

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Safety Precautions

1-2

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BLUE LED

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Safety Precautions

1-3

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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 a circuit board.

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Safety Precautions

1-4

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2. Specification

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2-1

GSM 900

Phase 1 EGSM 900

Phase 2 DCS1800

Phase 1 PCS1900

Freq. Band[MHz]

Uplink/Downlink 890~915

935~960 880~915

925~960 1710~1785

1805~1880 1850~1910

1930~1990

ARFCN range 1~124 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

Time Slot

Period/Frame Period 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 4

(max +33dBm) 4

(max +33dBm) 1

(max +30dBm) 1

(max +30dBm)

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

TDMA Mux 8 8 8 8

Cell Radius 35Km 35Km 2Km 2Km

2-1. GSM General Specification

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Specification

2-2

TX Power

control level PCS1900

030±3dBm

128±3dBm

226±3dBm

324±3dBm

422±3dBm

520±3dBm

618±3dBm

716±3dBm

814±3dBm

912±4dBm

10 10±4 dBm

11 8±4dBm

12 6±4 dBm

13 4±4 dBm

14 2±5 dBm

15 0±5 dBm

TX Power

control level GSM900

533±2dBm

631±2dBm

729±2dBm

827±2dBm

925±2dBm

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

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

2-2. GSM TX power class

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3. Operation Instruction and Installation

3-1

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Main Function

―Video recording & Messaging

―Mobile Tracker, My Menu, Living world

―Built-In 2 Mega-Fixel Digital Camera

―MP3 Player(Music Library) and Java Games

―MP3, AAC+, MP4, 3GPP Decoding(Off-line mode)

―WMDRM(Windows Media DRM 10 for Portable Devices)

―MTP(Media Transfer Protocol): Easy & Fast PC sync

―Hands-free speaker phone function

―Bluetooth v.2.0 + EDR / USB v.2.0(B/T Headset)

―FM Radio (FM radio recording: MP3 format support)

―Organizer feature provides Calendar, Alarms, Calculator, and Converter

―Multimedia Messaging Service-send and receive text messages with animation and sound

―Text Messaging Service-send and receive alphanumeric messages and Email

―Media Net Internet browsing

―Support 64 note polyphonic ringtones, MP3 ringtones, and AAC ringtones(Madwave)

―Tri-Band(900/1800/1900) EDGE Support

―WAP 2.0 / Java MIDP 2.0

―Extended Memory (microSD slot)

―Black GUI / UI

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Operation Instruction and Installation

3-2

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