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GSM TELEPHONE
SGH-B500
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. Disassembly and Assembly
Instructions
8. Block Diagrams
9. PCB Diagrams
10. Chart of Troubleshooting
11. Reference data
12. Schematic Diagram
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 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
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
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
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
2. Specification
2-1. GSM General Specification
G S M 9 00 EGSM 900 DCS1 800
Ph ase 1 Ph ase 2 Phase 1
F r eq. Ban d[MHz] 89 0~9 15 88 0~9 15 171 0~ 178 5
Up lin k/D own lin k 93 5~9 60 92 5~9 60 180 5~ 188 0
0~ 124 &
ARF CN r a nge 1 ~12 4 51 2~ 885
975 ~1 023
T x/ Rx s p ac in g 45 M H z 45 M H z 95 M H z
Mod. Bit r ate/ 270 .8 33 Kb ps 270 .8 33 Kb ps 270 .8 33 Kb ps
Bit Period 3.692 us 3.692 us 3.692 us
T ime Slot Peri od/F r ame 576 .9 us 576 .9 us 576 .9 us
Period 4.615 ms 4.615 ms 4.615 ms
Mod ula ti on 0 .3 GMSK 0 .3 GMSK 0 .3 GMSK
MS Power 33 dBm~ 1 3 dB m 33 dB m~ 5 dB m 30 dB m~ 0 dBm
Powe r Cla ss 5 pcl ~ 15 pcl 5 pcl ~ 19 pcl 0 pcl ~ 15 pcl
Sensi ti vity - 10 2 dBm -10 2 dBm - 10 0 dBm
TDMA Mux 8 8 8
C ell Rad ius 35 Km 35 Km 2 Km
2-1
Specification
2-2. GSM TX power class
TX Power GSM900 TX Power DCS1800
control level control level
5 33