Samsung SGH-I740c User manual

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 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

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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)

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11. Reference data
11-1
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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

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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
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.

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Safety Precautions
1-2
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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 acircuit board.

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4. Array course control
4-1
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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.
1

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Array course control
4-3
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4-2-2-2. PDA S/W Downloading
■Load the binary download program by executing the
“Windows Mobile PPC(Fedora,Qingdao2)_v0.1.exe”
1.Select aprofile >SGH-i740c(WM6-LV image)

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Array course control
4-4
This Document can not be used without Samsung's authorization
2. Click 'Loader' and 'PDA' button for selecting the image to download.
3. Click the 'Detect' button and device power on.

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5. Exploded View and Parts List
5-1
This Document can not be used without Samsung's authorization
5-1. Cellular phone Exploded View
QFR01
QKP01
QME03
QLC01
QLB01
QVO01
QMO01
QST01
QCA01
QCR68
QSP01
QAR01
QCR12
QJK01
QCK01
QAN05
QMP01
QAN01
QRE01
QRF01
QCR04
QBA02
QBA00
QCR57
QCK02
QSD01
QAN02
QIF01

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Exploded View and Parts List
5-1
This Document can not be used without Samsung's authorization
Design LOC Description SEC CODE
QAN01 INTENNA-SGH I728 MAIN GH42-01479A
QAN05 ASSY MEC-RUBBER ANT CON GH75-09161A
QAR01 AUDIO-RECEIVER 3009-001315
QBA00 PMO COVER-BATT GH72-49046A
QBA02 INNER BATTERY PACK-1500MAH,BLK GH43-02888A
QCA01 CAMERA MODULE-SGHI728 GH59-05285A
QCK01 ASSY KEY-CAMERA GH98-08319A
QCK02 PMO KEY-POWER GH72-46332A
QCR04 SCREW-MACHINE 6001-001479
QCR12 SCREW-MACHINE 6001-001530
QCR57 SCREW-MACHINE 6001-002001
QCR68 SCREW-TAPPING 6002-001399
QFR01 ASSY CASE-FRONT GH98-07168B
QIF01 PMO COVER-IF GH72-46329A
QJK01 UNIT-OPTICAL JOYSTICK GH59-05581A
QKP01 ASSY KEYPAD-(CIS/GRY) GH98-09348B
QLB01 ASSY BRACKET-LCD GH98-07170A
QLC01 LCD-MODULE, SGHI728 GH07-01230A
QME03 UNIT-TOUCHPANNEL GH59-06036A
QMO01 MOTOR DC-SGHI728 GH31-00407A
QMP01 A/S ASSY-SGH-I740MSCSER GH82-03037A
QRE01 ASSY CASE-REAR GH98-07169A
QRF01 TAPE-SHEET RF GH74-37234A
QSD01 PMO COVER-SD GH72-46328A
QSP01 ASSY ETC-SPEAKER MODULE GH59-05608A
QST01 ASSY ACCE-STYLUS PEN GH98-07548A
QVO01 ASSY KEY-VOLUME GH98-08320A
5-2. Cellular phone Parts list

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6. MAIN Electrical Parts List
6-1
This Document can not be used without Samsung's authorization
SEC CODE Design LOC Discription STATUS
0403-001547 D501 DIODE-ZENER SA
0403-001547 D506 DIODE-ZENER SA
0404-001167 ZD711 DIODE-SCHOTTKY SA
0404-001172 D503 DIODE-SCHOTTKY SA
0404-001172 D901 DIODE-SCHOTTKY SA
0406-001167 ZD802 DIODE-TVS SA
0406-001167 ZD803 DIODE-TVS SA
0406-001167 ZD805 DIODE-TVS SA
0406-001190 ZD708 DIODE-TVS SA
0406-001208 ZD801 DIODE-TVS SA
0406-001210 ZD502 DIODE-TVS SA
0406-001210 ZD601 DIODE-TVS SA
0406-001210 ZD602 DIODE-TVS SA
0406-001210 ZD603 DIODE-TVS SA
0406-001210 ZD604 DIODE-TVS SA
0406-001215 D504 DIODE-TVS SA
0406-001215 D505 DIODE-TVS SA
0406-001215 D801 DIODE-TVS SA
0406-001215 D802 DIODE-TVS SA
0406-001231 D804 DIODE-TVS SA
0406-001231 D806 DIODE-TVS SA
0406-001231 D809 DIODE-TVS SA
0406-001231 ZD703 DIODE-TVS SA
0406-001231 ZD704 DIODE-TVS SA
0406-001231 ZD705 DIODE-TVS SA
0406-001231 ZD706 DIODE-TVS SA
0406-001231 ZD707 DIODE-TVS SA
0406-001231 ZD710 DIODE-TVS SA
0407-001007 D502 DIODE-ARRAY SA
0504-000168 Q503 TR-DIGITAL SA
0504-001171 TR901 TR-DIGITAL SA
0505-001165 Q502 FET-SILICON SA
0505-001518 Q301 FET-SILICON SA
0505-001518 Q801 FET-SILICON SA
0505-001518 Q802 FET-SILICON SA
0505-001518 Q803 FET-SILICON SA

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Main Electrical Parts List
6-2
This Document can not be used without Samsung's authorization
SEC CODE Design LOC Discription STATUS
0505-002088 Q501 FET-SILICON SA
0505-002088 Q601 FET-SILICON SA
0505-002088 Q701 FET-SILICON SA
0801-002237 U306 IC-CMOS LOGIC SA
0801-002529 U307 IC-CMOS LOGIC SA
0801-002882 U509 IC-CMOS LOGIC SA
0801-002970 U102 IC-CMOS LOGIC SA
0801-002970 U504 IC-CMOS LOGIC SA
0801-002970 U507 IC-CMOS LOGIC SA
0801-002970 U709 IC-CMOS LOGIC SA
0801-002970 U903 IC-CMOS LOGIC SA
0801-002970 U904 IC-CMOS LOGIC SA
0801-002970 U905 IC-CMOS LOGIC SA
0801-003013 U808 IC-CMOS LOGIC SA
0801-003013 U809 IC-CMOS LOGIC SA
0801-003013 U810 IC-CMOS LOGIC SA
0801-003016 U401 IC-CMOS LOGIC SA
0801-003016 U901 IC-CMOS LOGIC SA
0801-003016 U902 IC-CMOS LOGIC SA
0801-003031 U206 IC-CMOS LOGIC SA
0801-003052 U403 IC-CMOS LOGIC SA
0801-003052 U806 IC-CMOS LOGIC SA
0801-003076 U404 IC-CMOS LOGIC SA
0902-002235 UCP901 IC-MICROPROCESSOR SA
0902-002279 MOD202 IC-MICROPROCESSOR SA
1001-001231 U301 IC-ANALOG SWITCH SA
1001-001362 U603 IC-ANALOG SWITCH SA
1001-001362 U604 IC-ANALOG SWITCH SA
1001-001394 U207 IC-ANALOG SWITCH SA
1001-001410 U701 IC-ANALOG SWITCH SA
1003-002047 U803 IC-MOTOR DRIVER SA
1003-002102 U204 IC-LEVEL DRIVER SA
1003-002102 U807 IC-LEVEL DRIVER SA
1006-001322 U804 IC-LINE TRANSCEIVER SA
1106-001564 UME401 IC-SRAM SA
1108-000142 UME301 IC-MCP SA

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Main Electrical Parts List
6-3
This Document can not be used without Samsung's authorization
SEC CODE Design LOC Discription STATUS
1201-002240 U601 IC-AUDIO AMP SA
1201-002343 U203 IC-IF/RF AMP SA
1201-002423 PAM101 IC-POWER AMP SA
1203-002832 U508 IC-VOL. DETECTOR SA
1203-003545 U303 IC-DC/DC CONVERTER SA
1203-003643 U712 IC-MULTI REG. SA
1203-003664 U706 IC-MULTI REG. SA
1203-003664 U708 IC-MULTI REG. SA
1203-003664 U710 IC-MULTI REG. SA
1203-003737 U305 IC-POSI.FIXED REG. SA
1203-003882 U406 IC-POWER SUPERVISOR SA
1203-003926 U503 IC-VOL. DETECTOR SA
1203-004043 U705 IC-MULTI REG. SA
1203-004435 U713 IC-MULTI REG. SA
1203-004507 U101 IC-POSI.FIXED REG. SA
1203-004540 U711 IC-DC/DC CONVERTER SA
1203-004838 U502 IC-BATTERY SA
1203-004841 U501 IC-POWER SUPERVISOR SA
1203-004931 U707 IC-MULTI REG. SA
1203-004956 U801 IC-DC/DC CONVERTER SA
1203-005069 U702 IC-POSI.FIXED REG. SA
1204-002746 MOD203 IC-TUNER SA
1205-002720 U602 IC-CODEC SA
1205-002757 UCP301 IC-MODEM SA
1205-002767 U201 IC-SWITCH SA
1205-003093 UPL101 IC-TRANSCEIVER SA
1205-003375 U704 IC-INTERFACE SA
1404-001221 TH301 THERMISTOR-NTC SA
1404-001221 TH601 THERMISTOR-NTC SA
2007-000138 R216 R-CHIP SA
2007-000138 R224 R-CHIP SA
2007-000138 R318 R-CHIP SA
2007-000138 R616 R-CHIP SA
2007-000138 R617 R-CHIP SA
2007-000138 R721 R-CHIP SA
2007-000140 R103 R-CHIP SA

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Main Electrical Parts List
6-4
This Document can not be used without Samsung's authorization
SEC CODE Design LOC Discription STATUS
2007-000140 R303 R-CHIP SA
2007-000140 R803 R-CHIP SA
2007-000140 R807 R-CHIP SA
2007-000140 R809 R-CHIP SA
2007-000141 R706 R-CHIP SA
2007-000141 R707 R-CHIP SA
2007-000141 R908 R-CHIP SA
2007-000141 R909 R-CHIP SA
2007-000143 R104 R-CHIP SA
2007-000143 R208 R-CHIP SA
2007-000143 R209 R-CHIP SA
2007-000143 R313 R-CHIP SA
2007-000148 R205 R-CHIP SA
2007-000148 R302 R-CHIP SA
2007-000148 R316 R-CHIP SA
2007-000148 R905 R-CHIP SA
2007-000148 R906 R-CHIP SA
2007-000148 R912 R-CHIP SA
2007-000148 R913 R-CHIP SA
2007-000148 R914 R-CHIP SA
2007-000148 R917 R-CHIP SA
2007-000151 R907 R-CHIP SA
2007-000157 R506 R-CHIP SA
2007-000157 R705 R-CHIP SA
2007-000161 R203 R-CHIP SA
2007-000161 R204 R-CHIP SA
2007-000161 R206 R-CHIP SA
2007-000162 R307 R-CHIP SA
2007-000162 R308 R-CHIP SA
2007-000162 R319 R-CHIP SA
2007-000162 R404 R-CHIP SA
2007-000162 R503 R-CHIP SA
2007-000162 R504 R-CHIP SA
2007-000162 R523 R-CHIP SA
2007-000162 R704 R-CHIP SA
2007-000162 R911 R-CHIP SA

SAMSUNG Proprietary-Contents may change without notice
Main Electrical Parts List
6-5
This Document can not be used without Samsung's authorization
SEC CODE Design LOC Discription STATUS
2007-000163 R202 R-CHIP SA
2007-000163 R207 R-CHIP SA
2007-000163 R910 R-CHIP SA
2007-000164 R317 R-CHIP SA
2007-000165 R201 R-CHIP SA
2007-000165 R227 R-CHIP SA
2007-000165 R315 R-CHIP SA
2007-000165 R630 R-CHIP SA
2007-000166 R512 R-CHIP SA
2007-000166 R513 R-CHIP SA
2007-000170 R514 R-CHIP SA
2007-000170 R525 R-CHIP SA
2007-000170 R728 R-CHIP SA
2007-000171 R214 R-CHIP SA
2007-000171 R215 R-CHIP SA
2007-000171 R301 R-CHIP SA
2007-000171 R402 R-CHIP SA
2007-000171 R403 R-CHIP SA
2007-000171 R407 R-CHIP SA
2007-000171 R505 R-CHIP SA
2007-000171 R601 R-CHIP SA
2007-000171 R608 R-CHIP SA
2007-000171 R609 R-CHIP SA
2007-000171 R628 R-CHIP SA
2007-000171 R629 R-CHIP SA
2007-000171 R631 R-CHIP SA
2007-000171 R701 R-CHIP SA
2007-000171 R702 R-CHIP SA
2007-000171 R712 R-CHIP SA
2007-000171 R713 R-CHIP SA
2007-000171 R717 R-CHIP SA
2007-000171 R718 R-CHIP SA
2007-000171 R725 R-CHIP SA
2007-000171 R730 R-CHIP SA
2007-000171 R901 R-CHIP SA
2007-000171 R902 R-CHIP SA

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Main Electrical Parts List
6-6
This Document can not be used without Samsung's authorization
SEC CODE Design LOC Discription STATUS
2007-000171 R903 R-CHIP SA
2007-000171 R915 R-CHIP SA
2007-000242 R311 R-CHIP SA
2007-000242 R312 R-CHIP SA
2007-001290 R804 R-CHIP SA
2007-001292 R805 R-CHIP SA
2007-001295 R731 R-CHIP SA
2007-001295 R732 R-CHIP SA
2007-001298 R225 R-CHIP SA
2007-001313 R102 R-CHIP SA
2007-001339 R703 R-CHIP SA
2007-001339 R722 R-CHIP SA
2007-003010 R708 R-CHIP SA
2007-003010 R709 R-CHIP SA
2007-003010 R723 R-CHIP SA
2007-007100 R401 R-CHIP SA
2007-007107 R309 R-CHIP SA
2007-007107 R310 R-CHIP SA
2007-007107 R405 R-CHIP SA
2007-007107 R406 R-CHIP SA
2007-007107 R602 R-CHIP SA
2007-007107 R603 R-CHIP SA
2007-007107 R622 R-CHIP SA
2007-007107 R623 R-CHIP SA
2007-007107 R626 R-CHIP SA
2007-007107 R627 R-CHIP SA
2007-007132 R528 R-CHIP SA
2007-007134 R604 R-CHIP SA
2007-007134 R605 R-CHIP SA
2007-007134 R817 R-CHIP SA
2007-007137 R501 R-CHIP SA
2007-007137 R502 R-CHIP SA
2007-007137 R607 R-CHIP SA
2007-007137 R610 R-CHIP SA
2007-007142 R213 R-CHIP SA
2007-007142 R524 R-CHIP SA