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.
ⓒ
Samsung Electronics Co.,Ltd.
2007. 9. Rev.1.0
1. Safety Precautions
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.
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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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2. Specification
2-1. GSM General Specification
GSM900
Phase 1
Freq.
Band[MHz]
Uplink/Downlink
ARFCN range1~124
Tx/Rx spacing45MHz45MHz95MHz80MHz190MHz
Mod. Bit rate/
Bit Period
Time Slot
Period/Frame
Period
Modulation0.3GMSK0.3GMSK0.3GMSK0.3GMSK
MS Power
890~915
935~960
270.833kbps
3.692us
576.9us
4.615ms
33dBm~13dBm33dBm~5dBm30dBm~0dBm30dBm~0dB
EGSM 900
Phase 2
880~915
925~960
0~124 &
975~1023
270.833kbps
3.692us
576.9us
4.615ms
DCS1800
Phase 1
1710~1785
1805~1880
512~885512~810
270.833kbps
3.692us
576.9us
4.615ms
PCS1900WCDMA 2100
1850~1910
1930~1990
270.833kbps
3.692us
576.9us
4.615ms
m
1922 ~ 1977
2112 ~ 2167
UL : 9612 ~ 9888
DL : 10562 ~ 10838
3.84Mcps
Frame Length :10ms
Slot length :0.667ms
QPSK
HQPSK
24dBm ~ -50 dBm
Power Class
Sensitivity-102dBm-102dBm-100dBm-100dBm-106.7 dBm
TDMA Mux8888
Cell Radius35Km35Km2Km-2Km
5pcl ~
15pcl
5pcl ~ 19pcl0pcl ~ 15pcl0pcl ~ 15pcl
(max + 24dBm)
3
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Specification
2-2. GSM TX power class
TX Power
control level
533±2 dBm
631±2 dBm
729±2 dBm
827±2 dBm
925±2 dBm
1023±2 dBm
1121±2 dBm
GSM900
TX Power
control level
030±2dBm
128±3dBm
226±3dBm
324±3dBm
422±3dBm
520±3dBm
618±3dBm
DCS1800
TXPower
control level
030±2dBm
128±3dBm
226±3dBm
324±3dBm
422±3dBm
520±3dBm
618±3dBm
PCS1900
1219±2 dBm
1317±2 dBm
1415±2 dBm
1513±2 dBm
1611±3 dBm
179±3dBm
187±3 dBm
195±3 dBm
716±3dBm
814±3dBm
912±4dBm
1010±4 dBm
118±4dBm
126±4 dBm
134±4 dBm
142±5 dBm
150±5 dBm
716±3dBm
814±3dBm
912±4dBm
1010±4 dBm
118±4dBm
126±4 dBm
134±4 dBm
142±5 dBm
150±5 dBm
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3. Product Function
Main Function
―
Mobile Instant Messaging
―
Built-In Digital Camera with flash and Video Capture
―
MP3 Player, and Java Games
―
Hands-free speaker phone
―
Bluetooth Wireless Technology
―
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 A AC ringtones
―
Tripple band(900/1800/1900MHz), WCDMA2100
―
VGA
―
GPRS Class 10
Camera
―
EGPRS Class E2
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Product Function
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4. Array course control
4-1. Software Adjustments
1
1. JIG: Download, Trace, Calibration, etc[
2. RF test cable: RF test [
3. Test cable: JIG to phone [
4. TA (Travel Adaptor - S20pin ) [
5. Data Link Cable : USB cable (S20) [
GH44-01702A
GH39-00922A
6. Serial cable: PC to JIG
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]
]
Array course control
4-2. Software Downloading
-2-1. Downloading Binary Files
• Five binary files for downloading J750
–
–
– J750XAGF3.rc1: Files need for each application, Power on/off& Back charging animation
–
: Modem binary for communication function
& Mocha binary for user interface and various application
: Dependent Parameter Set
: Default file system to be put into in initial production
4-2-2. Pre-requsite for Downloading
• Downloader Program(J750 Downloader V8.exe)
• SGH-J750 Mobile Phone
• USB Data Link Cable
• Binary files
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4-2-3. S/W Downloader Program
Array course control
1. Load the binary download program by executing the“J750 Downloader V8.exe
"
and initially check Include "Calset Data" and "All Images Download to NOR + NAND"
2. Press the button "D/L Bootloader" and then check '"OK" for downloading Bootloader.
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Array course control
3. Select the binary file what you want to download
4. Now press the button 'START' and SGH-J750 connets with cable
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5. When checking is completed, Press Nand Erase.
Array course control
6. Now press the button 'Download'.
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5. Exploded View and Parts List
5-1. Cellular phone Exploded View
QFU01
QKP01
QCR58
QKP02
QCA02
QSP01
QCA01
QLC01
QCR05
QFR00
QSC05
QME02
QMP02
QPC01
QFL01
QHI01
QMO01
QVO01
QBT02
QSH01
QME01
QMP01
QMI01
QCK01
QAN02
QIF01
QRE01
QSD01
QCR05
QBA01
QFR01
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QBA00
Exploded View and Parts List
5-2. Cellular phone Parts List
Design LOCDescriptionSEC CODE
QAN02INTENNA-SGHJ750GH42-01284A
QBA00ASSY COVER-BATTERYGH98-06709A
QBA01INNER BATTERY PACK-880MAH , BLGH43-02772A
QBT02ASSY RUBBER-BT CAPGH98-05345A
QCA01CAMERA MODULE-1.3MEGAGH59-04621A
QCA02CAMERA MODULE-QCIFGH59-04622A
QCK01PMO KEY-CAMEARAGH72-42448A
QCR05SCREW-MACHINE6001-001478
QCR05SCREW-MACHINE6001-001478
QCR58SCREW-MACHINE6001-001870
QFU01ASSY CASE-SLIDE UPPERGH98-05283A
QKP01ASSY KEYPAD-MAIN(OPEN/BLK)GH98-05285A
QKP02ASSY KEYPAD-SUB(OPEN/BLK)GH98-05286A
QLC01MEA-LCD MODULE KIT(J750)GH97-08112A
QME01DOME SHEET-DOME SHEET 12KEYGH59-04659A
QME02DOME SHEET-DOME SHEET SUB 10 KGH59-04660A
QMI01MICROPHONE-ASSYGH30-00393A
QMO01MOTOR DCGH31-00088A
QMP01PBA MAIN-SGHJ750GH92-03930A
QMP02PBA SUB-SGHJ750GH92-03870A
QPC01MEA-SLIDER FPCB KIT(J750)GH97-08113A
QSC05TAPE-COVER SCREW LOWER LGH74-32974A
QSH01ASSY BRACKET-SHIELD CANGH98-05287A
QSP01MICRO SPEAKER3001-002190
QVO01PMO KEY-VOLUMEGH72-42447A
QFR00ASSY CASE-FRONT/SLIDE LOWERGH98-06674A
QFR01ASSY CASE-FRONTGH98-05281A
QFL01ASSY CASE-SLIDE LOWERGH98-05282A
QHI01ASSY HINGE-MULTI TORSION SPRINGH98-05822A
QRE01ASSY CASE-REARGH98-05284A
QIF01PMO COVER-IFGH72-42445A
QSD01PMO COVER-MICRO SDGH72-42446A
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