Samsung SGH-C240 Service 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

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.

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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.

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2. Specification

2-1. GSM General Specification

GSM900
Phase 1

Freq. Band[MHz]

Uplink/Downlink

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

Tx/Rx spacing 45MHz 45MHz 95MHz

Mod. Bit rate/

Bit Period

Time Slot Period/Frame

Period

Modulation 0.3GMSK 0.3GMSK 0.3GMSK

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

890~915
935~960

270.833kbps

3.692us

576.9us

4.615ms

EGSM 900

Phase 2

880~915
925~960

270.833kbps

3.692us

576.9us

4.615ms

DCS1800

Phase 1

1710~1785
1805~1880

270.833kbps

3.692us

576.9us

4.615ms

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

Sensitivity -102dBm -102dBm -100dBm

TDMA Mux 8 8 8

Cell Radius 35Km 35Km 2Km

2-1

Speclflcation

2-2. GSM Tx Power Class

TX Power

control level

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

GSM900

TX Power

control level

DCS1800

14 15±2 dBm 9 12±4 dBm

15 13±2 dBm 1 0 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

2-2

3. Product Function

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.

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Product Function

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4. Array course control

4-1. Software Adjustments

TEST JIG (GH80-00865A)

DATA CABLE

(GH39-00127A)

RF Test Cable

(GH39-00283A)

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Array course control

4-2. Software Downloading

4-2-1. Downloading Binary File

• Binary file for downloading C240.
– C240XXYY.s3 : Main source code binary.

4-2-2. Pre-requsite for Downloading

• Downloader Program(OptiFlash.exe)

• C240 Mobile Phone

• Data Cable

• Binary file

4-2-3. S/W Downloader Program

1. Load the binary download program by executing the “

OptiFlash.exe

”

2. Select the

“Options” -> “Settings” -> “Generic” -> “Specify hardware platform

Choose hardware platform for the downloader file setting.

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”.

Set the everything else as the default values which are shown below

Array course control

3. Select the

COM port

when the download cable is connected

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Array course control

Up to twelve ports are supported. Additionally you can select the maximum
transfer speed OptiFlash will use to communicate with the phone. However,
OptiFlash will use a slower speed if either the PC’s or the phone’s serial
hardware is incapable of handling the selected speed

4. Select the“

Flash&Verify” -> “Browse

”

Set the directory path and choose the latest s/w binary, for example

“C240XXYY.s3”,for the downloader binary setting.

Make sure that not to change the reserved memory regions.

In case of C240 the reserved regions are :

- 0x00c00000 - 0x00c9ffff

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Array course control

5. Click “OK” button then press “

Flash

(Before pressing ‘Flash’ button, push the button

”.

‘*’and ‘END’ at the same time

press ‘Flash’.)
Downloader will upload the binary file as below for the downloading.

.Then

6. When downloading is finished successfully, there is a “All is well” message.

7. After finishing downloading, Certain memory resets should be done to guarantee the

normal performance.

8. Confirm the downloaded version name and etc. :

*#5002*8376263#

Full Reset :

*2767*3855#

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Array course control

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5. Exploded View/Disassembly&Assembly Instructions

5-1. Cellular phone Exploded View

QMW02

QFR01

QKP01

QAR01
QLC01
QMP01
QAN05
QSP01

QME01
QMI01

QAN02

QSC01

QRE01

QRF01

QMO01

QIF01

QRF03

QCR06

QBA01

QBA00

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Exploded View/Disassembly&Assembly Instructions

5-2. Cellular phone Parts List

Design LOC Description SEC CODE

QAN02
QAN05
QAR01
QBA00
QBA01
QCR06
QFR01
QKP01
QLC01
QME01

QMI01

QMO01

QMP01

QMW02

QRF01
QSC01
QSP01
QRE01

QIF01 PMO-IF COVER V4 GH72-36725A

QRF03 PMO-COVER EAR V4 GH72-35742A

ASSY RUBBER-INTENNA CONTACT GH98-03564A

INNER BATTERY PACK-750MAH,BLK, GH43-02483A

MPR-TAPE SHEET INTENNA COVER GH74-27823A

INTENNA-SGHC240 GH42-00891A

AUDIO-RECEIVER 3009-001214

PMO-COVER BATTERY V3 GH72-35740A

SCREW-MACHINE 6001-001155

ASSY CASE-FRONT GH98-01615A

ASSY KEYPAD-(SER/SIL) GH98-01995A

LCD-LCD MODULE GH07-00928A

UNIT-METAL DOME GH59-03278A

MICROPHONE-ASSY-SGHC240 GH30-00288A

MOTOR DC-SGHC240 GH31-00268A

PBA MAIN-SGHC240 GH92-02900A

PCT-COVER WINDOW MAIN GH72-34846A

MPR-TAPE SHEET RF COVER GH74-27237A

SPEAKER 3001-002018

ASSY CASE-REAR GH98-01616A

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