Samsung SGH-E740S Bedienungsanleitung
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
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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 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 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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