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GSM TELEPHONE
SGH-D900i
GSM TELEPHONE CONTENTS
1. Safety Precautions
2. Specification
3. Operation Instruction and
Installation
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
GSPN (Global Service Partner Network)
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
This Service Manual is a property of Samsung Electronics Co.,Ltd. Samsung Electronics Co.,Ltd.
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law. 2007. 05. 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 specificity 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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Safety Precautions
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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2. Specification
2-1. GSM General Specification
GSM900 EG SM 900 DCS1 800
PCS1 900
Phase 1 Phase 2 Phase 1
Fr eq. Band [MHz] 890~9 15 880~ 915 1710~1 785 1850~1 910
Uplink/ Downlink 935~9 60 925~ 960 1805~1 880 1930~1 990
0~ 124 &
ARFCN ran ge 1~12 4 512~8 85 512~8 10
975~ 1023
Tx/Rx spacin g 45MHz 45MHz 95MHz 80MHz
Mod. Bit rat e 270.8 33kbps 270. 833kbps 2 70.83 3kbps 270.8 33kbps
/ Bit Per iod 3.69 2us 3.6 92us 3.69 2us 3.69 2us
Time Slot Period 576. 9us 576. 9us 576. 9us 576. 9us
/ Fra me Per iod 4 .615ms 4.615 ms 4 .615ms 4 .615ms
Mod ulat ion 0.3G MSK 0.3 GMSK 0.3G MSK 0.3G M SK
MS Power 33dBm~ 5dBm 33dBm~5dBm 3 0dBm~0 dBm 30dBm~ 0dBm
Power Cl ass 5pcl ~ 1 9pcl 5pcl ~ 19pcl 0pcl ~ 15pcl 0pcl ~ 15pcl
Sensitivity - 102dBm - 102dBm - 100dBm - 100dBm
TDMA M ux 8 8 8 8
Cell Radius 35Km 35 Km 2Km -
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Specification
2-2. GSM TX power class
TX Power GSM900 TX Power TX Power
DCS1800 PCS1900
control level GSM850 control level control level
5 33