Samsung SGH-C240 User manual

GSM TELEPHONE

SGH-C240

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. Block Diagrams

8. PCB Diagrams

9. Flow Chart of Troubleshooting

10. Reference data

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 Class...............................................................................................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 Part 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........................................................................................................................9-3

9-1-3. Sim Part..................................................................................................................9-5

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................................................................................................................9-14

9-2-3. GSM TX................................................................................................................9-17

9-2-4. DCS Tx.................................................................................................................9-19

10. Reference data

SAMSUNG Proprietary-Contents may change without notice

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.

SAMSUNG Proprietary-Contents may change without notice

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

GSM900

Phase 1 EGSM 900

Phase 2 DCS1800

Phase 1

Freq. Band[MHz]

Uplink/Downlink 890~915

935~960 880~915

925~960 1710~1785

1805~1880

ARFCN range 1~124 0~124 & 975~1023 512~885

Tx/Rx spacing 45MHz 45MHz 95MHz

Mod. Bit rate/

Bit Period 270.833kbps

3.692us 270.833kbps

3.692us

Time Slot Period/Frame

Period 576.9us

4.615ms 576.9us

4.615ms

Modulation 0.3GMSK 0.3GMSK 0.3GMSK

MS Power 33dBm~13dBm 33dBm~5dBm 30dBm~0dBm

Power Class 5pcl ~ 15pcl 5pcl ~ 19pcl 0pcl ~ 15pcl

Sensitivity -102dBm -102dBm -100dBm

TDMA Mux 8 8 8

Cell Radius 35Km 35Km 2Km

Speclflcation

2-2

2-2. GSM Tx Power Class

TX Power

control level GSM900 TX Power

control level DCS1800

5 33±2 dBm 0 30±3 dBm

6 31±2 dBm 1 28±3 dBm

7 29±2 dBm 2 26±3 dBm

8 27±2 dBm 3 24±3 dBm

9 25±2 dBm 4 22±3 dBm

10 23±2 dBm 5 20±3 dBm

11 21±2 dBm 6 18±3 dBm

12 19±2 dBm 7 16±3 dBm

13 17±2 dBm 8 14±3 dBm

14 15±2 dBm 9 12±4 dBm

15 13±2 dBm 10 10±4 dBm

16 11±3 dBm 11 8±4dBm

17 9±3dBm 12 6±4 dBm

18 7±3 dBm 13 4±4 dBm

19 5±3 dBm 14 2±5 dBm

15 0±5 dBm

SAMSUNG Proprietary-Contents may change without notice

3. Product Function

3-1

This Document can not be used without Samsung's authorization

Main Function

-Name card

Create name cards with your number and profile. Whenever introducing yourself to

others, use this convenient electronic name card.

-Web browser

Access the wireless web to get current information and up-to-the-minute a wide

variety of media content.

-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.

-Java

Enjoy Java™-based embedded games and download new games.

-Calendar

Keep track of your daily, weekly, and monthly schedule.

-Voice recorder

Record memos or sounds.

SAMSUNG Proprietary-Contents may change without notice

Product Function

3-2

This Document can not be used without Samsung's authorization

SAMSUNG Proprietary-Contents may change without notice

4. Array course control

4-1

This Document can not be used without Samsung's authorization

4-1. Software Adjustments

TEST JIG (GH80-00865A)

DATA CABLE

(GH39-00127A)

RF Test Cable

(GH39-00283A)

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