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GSM TELEPHONE
SGH-J400
GSM TELEPHONE CONTENTS
1. Safety Precautions
2. Specification
3. Product Function
4. Array course control
5. Exploded View and Parts List
6. Main Electrical Parts List
7. Block Diagrams
8. PCB Diagrams
9. Flow Chart of Troubleshooting
10. Reference data
11. Disassembly and Assembly
Instructions
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. 11. 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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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
G SM900 EG SM 90 0 DCS1 800
PCS1 900 WCDMA 2100
Pha se 1 Pha se 2 Phase 1
Fr eq.
Ba nd[MHz] 89 0~915 88 0~915 1710~1 785 1850~1 910 1922 ~ 1977
Uplink/Downlin 93 5~960 92 5~960 1805~1 880 1930~1 990 2112 ~ 2167
k
0 ~124 & UL : 9612 ~ 9888
ARFCN ran ge 1 ~124 512~8 85 512~8 10 DL : 10562 ~
975 ~1023 10838
Tx/Rx spacin g 4 5MHz 4 5MHz 95MHz 80MHz 190 MHz
Mod . Bit r ate/ 270. 833kbp s 270. 833kbp s 2 70.83 3kbps 270.8 33kbps
3.84 Mcp s
Bi t Peri od 3. 692us 3. 692us 3.69 2us 3.69 2us
Fr ame Leng th
Tim e Slot
57 6.9us 57 6.9us 576. 9us 576. 9us :10ms
Per iod / Fr am e
4.6 15ms 4.6 15ms 4 .615ms 4 .615ms Slot lengt h
Per iod
:0 .667ms
Q PS K
Mo dulat ion 0. 3G MSK 0. 3G MSK 0.3G M SK 0.3G MSK HQ PSK
33dBm~13d 33dBm~5dB
MS Power Bm m 3 0dBm~0 dBm 30dBm~ 0dBm 24dBm ~ -5 0 dBm
Po wer Class 5p cl ~ 5pcl ~ 19pcl 0pcl ~ 15pcl 0pcl ~ 15pcl 3
1 5pcl (max + 2 4dBm)
Sen sitivity -102 dBm -102 dBm - 100dBm - 100dBm -106 .7 dBm
TDMA Mu x 8 8 8 8
Cell Radius 3 5Km 3 5Km 2Km - 2 Km
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Specification
2-2. GSM TX power class
TX Power GSM900 TX Power TX Power
control level DCS1800 PCS1900
control level control level
5 33