Samsung SGH-i450 service manual.pdf

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GSM TELEPHONE
SGH-i450
GSM TELEPHONE
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CONTENTS
Safety Precautions
Specification
Product Function
Array course control
Exploded View and Parts List
Main Electrical Parts List
Block Diagrams
PCB Diagrams
Flow Chart of Troubleshooting
Reference data
Disassembly and Assembly
Instructions
GSPN (Global Service Partner Network)
Country
North America
Latin America
CIS
Europe
China
Asia
Mideast & Africa
Web Site
service.samsungportal.com
latin.samsungportal.com
cis.samsungportal.com
europe.samsungportal.com
china.samsungportal.com
asia.samsungportal.com
mea.samsungportal.com
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. 10. 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.
1-1
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
S
afety 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.
1-2
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This Document can not be used without Samsung's authorization
2. Specification
2-1. GSM General Specification
EGSM 900
DCS 18 00
PCS 190 0
WCDMA 2100
Fre q. Band[MHz]
Uplink/Downlink
880~91 5
925~96 0
0~124 &
9 75~102 3
1 710~17 85
1 805~18 80
1 850~19 10
1 930~19 90
1 920~19 80
2 110~21 70
UL:9 612~98 88
DL:10 562~10 838
ARFCN r ange
512~88 5
512~81 0
Tx/Rx spa cing
10MHz
20MHz
20MHz
130MHz
Mod. Bit rat e/
Bit Period
T ime Slot Per iod/
Fra me Per iod
27 0.833 kbps
3.692 us
576.9 us
4. 615ms
27 0.833 kbps
3.692 us
576.9 us
4. 615ms
27 0.833 kbps
3.692 us
576.9 us
4. 615ms
3. 84Mcps
(chip ra te)
F rame l ength : 10ms
Slot lengt h : 0. 667ms
QPSK
HPSK
Modulation
0.3G M SK
0.3G MSK
0.3G M SK
MS Powe r
33 dBm~5d Bm
30 dBm~0d Bm
30 dBm~0d Bm
2 4dBm~- 50dBm
Power Class
4
(max +33dBm)
1
(max +30dBm)
1
(max +30dBm)
3
(max +24dBm)
Sensit ivit y
-1 02dBm
-1 00dBm
-1 00dBm
- 106.7 dBm
T DM A Mu x
8
8
8
Cell Radius
35Km
2Km
2Km
2Km
2-1
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization

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