Samsung SGH-F480I User manual

GSM TELEPHONE
SGH-F480i
1. Safety Precautions
2. Specification
3. Product Function
4. Array course control
5. Exploded View and Parts list
6. MAIN Electrical Parts List
7. Disassembly and Assembly
Instructions
8. Block Diagrams
9. PCB Diagrams
10. Chart of Troubleshooting
11. Reference data
GSM TELEPHONE CONTENTS

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1. Safety Precautions
1-2
This Document can not be used without Samsung's authorization
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 akind of magnetic object or tool,
because performance of parts is damaged by the influence of manetic force.
●Surely use astandard screwdriver when you disassemble this product,
otherwise screw will be worn away.
●Use athicken twisted wire when you measure level.
Athicken 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 arepair 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.

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Safety Precautions
1-2
This Document can not be used without Samsung's authorization
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 acircuit board.

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2. Specification
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2-1
2-1. GSM General Specification
EGSM900 DCS1800 PCS1900 WCDMA
2100
Freq.
Band[MHz]
Uplink/Downlink
880~915
925~960
1710~1785
1805~1880
1850~1910
1930~1990
1920~1980
2110~2170
ARFCN range 0~124 &
975~1023 512~885 512~810 UL : 9612~9888 DL : 10562~10838
Tx/Rx spacing 45MHz 95MHz 80MHz 190MHz
Mod. Bit rate/
Bit Period
270.833kbps
3.692us
270.833kbps
3.692us
270.833kbps
3.692us 3.84Mcps
Time lot Period/
Frame Period
576.9us
4.615ms
576.9us
4.615ms
576.9us
4.615ms
Frame length : 10ms
Slot length : 0.667ms
Modulation 0.3GMSK 0.3GMSK 0.3GMSK QPSK
HQPSK
MS Power 33dBm~5dBm 30dBm~0dBm 30dBm~0dBm 24dBm~ -50dBm
Power Class 4
(Max +33dBm)
1
(Max +30dBm)
1
(Max +30dBm)
3
(Max +24dBm)
Sensitivity -102dBm -100dBm -100dBm -106.7dBm
TDMA Mux 8 8 8 NA
Cell Radius 35Km 2Km 2Km 2Km

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This Document can not be used without Samsung's authorization
Specification
2-2
2-2. GSM Tx Power Class
TX Power
control level GSM900 TX Power control level DCS1800 TX Power control level PCS1800
5 33±2 dBm 0 30±3 dBm 0 30±3 dBm
6 31±2 dBm 1 28±3 dBm 1 28±3 dBm
7 29±2 dBm 2 26±3 dBm 2 26±3 dBm
8 27±2 dBm 3 24±3 dBm 3 24±3 dBm
9 25±2 dBm 4 22±3 dBm 4 22±3 dBm
10 23±2 dBm 5 20±3 dBm 5 20±3 dBm
11 21±2 dBm 6 18±3 dBm 6 18±3 dBm
12 19±2 dBm 7 16±3 dBm 7 16±3 dBm
13 17±2 dBm 8 14±3 dBm 8 14±3 dBm
14 15±2 dBm 9 12±4 dBm 9 12±4 dBm
15 13±2 dBm 10 10±4 dBm 10 10±4 dBm
16 11±3 dBm 11 8±4 dBm 11 8±4 dBm
17 9±3 dBm 12 6±4 dBm 12 6±4 dBm
18 7±3 dBm 13 4±4 dBm 13 4±4 dBm
19 5±3 dBm 14 2±5 dBm 14 2±5 dBm
15 0±5 dBm 15 0±5 dBm