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GSM TELEPHONE
SGH-X500
GSM TELEPHONE CONTENTS
1. Safety Precautions
2. Specification
3. Product Function
4. Array course control
5. Exploded View and Parts List
6. Disassembly and Assembly
instructions
7. MAIN Electrical Parts List
8. Block Diagrams
9. PCB Diagrams
10. Flow Chart of Troubleshooting
11. Reference data
Contents
1. Safety Precautions
1-1. Repair Precaution ...........................................................................1-1
1-2. ESD(Electrostatically Sensitive Devices) Precaution ...........................1-2
2. Specification
2-1. GSM General Specification ..............................................................2-1
2-2. GSM Tx Power Class ......................................................................2-2
3. Product Function
3-1. Main Function ................................................................................3-1
4. Array course control
Software Downloading
4-1. Downloading Binary Files ................................................................4-2
4-2. Pre-requsite for Downloading ..........................................................4-2
4-3. S/W Downloader Program ...............................................................4-3
5. Exploded View and Parts List
5-1. Cellular phone Exploded View .........................................................5-1
5-2. Cellular phone Part list ...................................................................5-2
6. Disassembly and Assembly instructions
6-1. Disassembly ..................................................................................6-1
6-2. Assembly ......................................................................................6-3
6-3. LCD KIT ........................................................................................6-6
7. MAIN Electrical Parts List
8. Block Diagrams
8-1. RF PART .......................................................................................8-1
8-2. ROGIC PART ..................................................................................8-2
8-3. BT Block .......................................................................................8-3
9. PCB Diagrams
Contents
10. Flow Chart of Troubleshooting
10-1. Baseband
10-1-1. Power ON ..............................................................................10-1
10-1-2. Initial ....................................................................................10-4
10-1-3. Sim Part ...............................................................................10-6
10-1-4 Microphone Part ......................................................................10-8
10-1-5. Speaker Part ........................................................................10-10
10-2. RF
10-2-1. EGSM RX .............................................................................10-13
10-2-2. DCS RX ...............................................................................10-14
10-2-3. PCS RX ...............................................................................10-15
10-2-4. EGSM TX .............................................................................10-17
10-2-5. DCS/PCS TX ........................................................................10-18
11. Reference data
1. Safety Precautions
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 a kind of magnetic object or tool,
because performance of parts is damaged by the influence of manetic 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 disassembing 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.
1-1
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Safety Precautions
1-2. ESD(Electrostatically Sensitive Devices) Precaution
Several semiconductor may be damaged easilly 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.
1-2
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2. Specification
2-1. GSM General Specification
GSM900 EGSM 900 DC S1800
PCS1900
Phase 1 Pha s e 2 Phase 1
Freq. Ban d [M Hz ] 890~915 880~915 1710~1785 1850~1910
Upl in k/Downl in k 935~960 925~960 1805~1880 1930~1990
0~124 &
A RF CN ra ng e 1~124 512~885 512~810
975~1023
Tx/R x sp aci ng 45 MHz 45 MHz 95 MHz 80 MHz
Mod. Bit rat e/ 270.833 kbps 270.833 kbps 270.833 kbps 270.833 kbps
Bit Period 3.692 us 3.692 us 3.692 us 3.692 us
Tim e Sl ot
576.9 us 576.9 us 576.9 us 576.9 us
P eri od /F rame
4.615 ms 4.615 ms 4.615 ms 4.615 ms
Peri od
Modu la t ion 0.3 GMSK 0.3 GMSK 0.3 GMSK 0.3 GMSK
M S Power 33 dBm~5 dBm 33 dBm~5 dBm 30 dBm~0 dBm 30 dBm~0 dBm
P ow er Cl a ss 5 pcl ~ 19 pcl 5 pcl ~ 19 pcl 0 pcl ~ 15 pcl 0 pcl ~ 15 pcl
S ensi ti vit y -102 dBm -102 dBm -100 dBm -100 dBm
TDM A Mu x 8 8 8 8
Cell Radiu s 35 Km 35 Km 2 Km -
2-1
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Specification
2-2. GSM TX power class
TX Power TX Power TX Power
GSM900 DCS1800 PCS1900
control level control level control level
5 33