Samsung SGH-P270 User manual

GSM TELEPHONE
SGH-P270
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

This Service Manual is aproperty of Samsung Electronics Co.,Ltd.
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law.
Samsung Electronics Co.,Ltd.
2008. 11. Rev.1.0
ⓒ
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
GSPN (Global Service Partner Network)

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2. Specification
This Document can not be used without Samsung's authorization
2-1
GSM900
Phase 1
EGSM 900
Phase 2
DCS1800
Phase 1 PCS1900
Freq. Band[MHz]
Uplink/Downlink
890~915
935~960
880~915
925~960
1710~1785
1805~1880
1850~1910
1930~1990
ARFCN range 1~124 0~124 &
975~1023 512~885 512~810
Tx/Rx spacing 45MHz 45MHz 95MHz 80MHz
Mod. Bit rate
/BitPeriod
270.833kbps
3.692us
270.833kbps
3.692us
270.833kbps
3.692us
270.833kbps
3.692us
Time Slot Period
/FramePeriod
576.9us
4.615ms
576.9us
4.615ms
576.9us
4.615ms
576.9us
4.615ms
Modulation 0.3GMSK 0.3GMSK 0.3GMSK 0.3GMSK
MS Power 33dBm~5dBm 33dBm~5dBm 30dBm~0dBm 30dBm~0dBm
Power Class 5pcl ~ 19pcl 5pcl ~19
pcl 0pcl ~15 pcl 0pcl ~15 pcl
Sensitivity -102dBm -102dBm -100dBm -100dBm
TDMA Mux 8 8 8 8
Cell Radius 35Km 35Km 2Km -
2-1. GSM General Specification

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Specification
2-2
TX Power
control level PCS1900
030±2
dBm
128±3
dBm
226±3
dBm
324±3
dBm
422±3
dBm
520±3
dBm
618±3
dBm
716±3
dBm
814±3
dBm
912±4
dBm
10 10±4 dBm
11 8±4dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
15 0±5 dBm
TX Power
control level DCS1800
030±2
dBm
128±3
dBm
226±3
dBm
324±3
dBm
422±3
dBm
520±3
dBm
618±3
dBm
716±3
dBm
814±3
dBm
912±4
dBm
10 10±4 dBm
11 8±4dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
15 0±5 dBm
TX Power
control level GSM900
533±2
dBm
631±3
dBm
729±3
dBm
827±3
dBm
925±3
dBm
10 23±3 dBm
11 21±3 dBm
12 19±3 dBm
13 17±3 dBm
14 15±3 dBm
15 13±3 dBm
16 11±5 dBm
17 9±5 dBm
18 7±5 dBm
19 5±5 dBm
2-2. GSM TX power class

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Specification
This Document can not be used without Samsung's authorization
2-3
TX Power
control level GSM900
827±3
dBm
925±3
dBm
10 23±3 dBm
11 21±3 dBm
12 19±3 dBm
13 17±3 dBm
14 15±3 dBm
15 13±3 dBm
16 11±5 dBm
17 9±5 dBm
18 7±5 dBm
19 5±5 dBm
TX Power
control level DCS1800
226-4/+3
dBm
324±3
dBm
422±3
dBm
520±3
dBm
618±3
dBm
716±3
dBm
812±3
dBm
910±3
dBm
10 14±3 dBm
11 12±4 dBm
12 10±4 dBm
13 8±4dBm
14 6±4 dBm
15 4±4 dBm
2-3. GSM EDGE TX power class
TX Power
control level PCS1900
226-4/+3
dBm
324±3
dBm
422±3
dBm
520±3
dBm
618±3
dBm
716±3
dBm
812±3
dBm
910±3
dBm
10 14±3 dBm
11 12±4 dBm
12 10±4 dBm
13 8±4dBm
14 6±4 dBm
15 4±4 dBm

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3. Product Function
3-1
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Main Function
－2MEGA PIXEL CMOS
－MP3 /64Poly Melody
－BT 2.0
－USB 2.0
－WAP 2.0
－FM Radio with RDS
－MIDP 2.0 / CLDC 1.1
－GPRS/EDGE :c
lass 12
－SMS /M
MS
－BT/FM :Stereo FM Radio +BT (CSR)
－Battery: 960mA
－Weight: 93.3 g
－Memory:1G LB +512Mb
－Camera: 2M + CIF CMOS
－LCD :2.2”,176
x220, 262K TFT
－Size: 99x49x14.9mm (TBD)
－Band: 900/1800/1900/2100
－BB :PNX 5217 (NXP)
－RF :UAA3582(3G) +SI4221(2G)

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10. Reference data
10-1
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Reference Abbreviate
―AAC:Advanced Audio Coding.
―AVC :Advanced Video Coding.
―BER :Bit Error Rate
―BPSK:Binary Phase Shift Keying
―CA :Conditional Access
―CDM :Code Division Multiplexing
―C/I :Carrier to Interference
―DMB :Digital Multimedia Broadcasting
―EN :European Standard
―ES :Elementary Stream
―ETSI:European Telecommunications Standards Institute
―MPEG:Moving Picture Experts Group
―PN :Pseudo-random Noise
―PS :Pilot Symbol
―QPSK:Quadrature Phase Shift Keying
―RS :Reed-Solomon
―SI :Service Information
―TDM :Time Division Multiplexing
―TS :Transport Stream

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1. Safety Precautions
1-1
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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 magnetic 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 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
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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 acircuit board.

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5. Exploded View and Parts List
5-1
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5-1. Cellular phone Exploded View
QMW01
QFU01
QMO01
QFL01
QCR17
QAR01
QCA02
QLC01
QME02
QKP02
QPC01
QFR01
QKP01
QME01
QCR12
QMP01
QMI01
QSH01
QAN03
QRE01
QCR03
QBA01
QBA00
QMI03
QCO01
QCH05
QIF01
QCK01
QSP01
QCA01
QAN02
QCR57