Samsung SGH-C266 User manual

GSM TELEPHONE
SGH-C266
GSM TELEPHONE CONTENTS
1. Specification
2. Exploded View and Parts list
3. Chart of Troubleshooting
4. Array course control
5. Block Diagrams
6. PCB Diagrams
7. MAIN Electrical Parts List
8. Reference data
9. Safety Precautions
10. Product Function

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. 2. Rev.1.0
ⓒ
Country Web Site
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Europe europe.samsungportal.com
China china.samsungportal.com
Asia asia.samsungportal.com
Mideast & Africa mea.samsungportal.com
GSPN (Global Service Partner Network)

CONTENTS
1. Safety Precautions
1-1. Repair Precaution......................................................................................................1-1
1-2. ESD(Electrostatically Sensitive Devices) Precaution...............................................1-2
2. Specification
2-1. GSM General Specification.......................................................................................2-1
2-2. GSM TX power Level...............................................................................................2-2
3. Product Function
4. Array course control
4-1. Software Adjustments................................................................................................4-1
4-2. Software Downloading...............................................................................................4-2
5. Exploded View/Disassembly & Assembly Instructions
5-1. Cellular phone Exploded View..................................................................................5-1
5-2. Cellular phone Parts list............................................................................................5-2
5-3. Disassembly & Assembly Instructions......................................................................5-4
6. MAIN Electrical Parts List
7. Block Diagrams
8. PCB Diagrams

CONTENTS
9. Flow Chart of Troubleshooting
9-1. Baseband
9-1-1. Power ON...............................................................................................................9-1
9-1-2. Initial........................................................................................................................9-4
9-1-3. SIM Part..................................................................................................................9-6
9-1-4. Microphone Part......................................................................................................9-7
9-1-5. Speaker Part...........................................................................................................9-9
9-1-6. LCD Backlight.......................................................................................................9-11
9-2. RF
9-2-1. GSM Rx................................................................................................................9-12
9-2-2. DCS Rx.................................................................................................................9-15
9-2-3. PCS Rx.................................................................................................................9-17
9-2-4. GSM Tx.................................................................................................................9-19
9-2-5. DCS Tx.................................................................................................................9-21
9-2-6. PCS Tx.................................................................................................................9-23
10. Reference data

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1. Safety Precautions
1-1
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 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.

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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 a circuit board.

2. Specification
2-1
2-1. GSM General Specification
GSM 850
Phase 2 DCS1800 Phase 1 PCS1900
Freq. Band[MHz]
Uplink/Downlink 824.2~848.8 869.2~893.8 1710~1785 1805~1880 1850~1910 1930~1990
ARFCN range 128~251 512~885 512~810
Tx/Rx spacing 45 MHz 95 MHz 80 MHz
Mod. Bit rate/
Bit Period 270.833 kbps 3.692 us 270.833 kbps 3.692 us 270.833 kbps 3.692 us
Time Slot Period/Frame Period 576.9 us
4.615 ms 576.9 us 4.615 ms 576.9 us 4.615 ms
Modulation 0.3 GMSK 0.3 GMSK 0.3 GMSK
MS Power 33 dBm~5 dBm 30 dBm~0 dBm 30 dBm~0 dBm
Power Class 5 pcl ~ 19 pcl 0 pcl ~ 15 pcl 0 pcl ~ 15 pcl
Sensitivity -102 dBm -100 dBm -100 dBm
TDMA Mux 8 8 8
Cell Radius 35 Km 2 Km -

Speclflcation
2-2
2-2. GSM Tx Power Class
TX Power
control level GSM850
5 33±2 dBm
6 31±2 dBm
7 29±2 dBm
8 27±2 dBm
9 25±2 dBm
10 23±2 dBm
11 21±2 dBm
12 19±2 dBm
13 17±2 dBm
14 15±2 dBm
15 13±2 dBm
16 11±3 dBm
17 9±3 dBm
18 7±3 dBm
19 5±3 dBm
TX Power
control level DCS1800
0 30±3 dBm
1 28±3 dBm
2 26±3 dBm
3 24±3 dBm
4 22±3 dBm
5 20±3 dBm
6 18±3 dBm
7 16±3 dBm
8 14±3 dBm
9 12±4 dBm
10 10±4 dBm
11 8±4 dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
15 0±5 dBm
TX Power
control level PCS1900
030±3dBm
128±3dBm
226±3dBm
324±3dBm
422±3dBm
520±3dBm
618±3dBm
716±3dBm
814±3dBm
912±4dBm
10 10±4 dBm
11 8±4 dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
15 0±5 dBm

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3. Product Function
3-1
This Document can not be used without Samsung's authorization
Main Function
-Web browser
Access the wireless web to get current information and up-to-the-minute a wide
variety of media content.
-Java
Enjoy Java™-based embedded games and download new games.
-Multimedia Message Service(MMS)
Send and receive MMS messages with a combination of text, image, video, and
audio.
-E-mail
Send and receive-emails with image, video,and audio attachments.

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Product Function
3-2
This Document can not be used without Samsung's authorization