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

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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 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
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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 270.833kbps 3.692us
Time Slot Period/Frame
Period 576.9us 4.615ms 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

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3. Product Function
3-1
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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
3-2
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4. Array course control
4-1
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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
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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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Array course control
4-3
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Set the everything else as the default values which are shown below
3. Select the COM port when the download cable is connected

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Array course control
4-4
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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
4-5
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5. Click “OK” button then press “Flash”.
(Before pressing ‘Flash’ button, push the button ‘*’and ‘END’ at the same time.Then
press ‘Flash’.)
Downloader will upload the binary file as below for the downloading.
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
4-6
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5-1
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5. Exploded View/Disassembly&Assembly Instructions
5-1. Cellular phone Exploded View
QMW02
QKP01
QFR01
QAR01
QLC01
QMP01
QAN05
QSP01
QAN02
QSC01
QRE01
QRF03
QIF01
QRF01
QME01
QMI01
QMO01
QCR06
QBA01
QBA00

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Exploded View/Disassembly&Assembly Instructions
5-2
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Design LOC Description SEC CODE
QAN02 INTENNA-SGHC240 GH42-00891A
QAN05 ASSY RUBBER-INTENNA CONTACT GH98-03564A
QAR01 AUDIO-RECEIVER 3009-001214
QBA00 PMO-COVER BATTERY V3 GH72-35740A
QBA01 INNER BATTERY PACK-750MAH,BLK, GH43-02483A
QCR06 SCREW-MACHINE 6001-001155
QFR01 ASSY CASE-FRONT GH98-01615A
QKP01 ASSY KEYPAD-(SER/SIL) GH98-01995A
QLC01 LCD-LCD MODULE GH07-00928A
QME01 UNIT-METAL DOME GH59-03278A
QMI01 MICROPHONE-ASSY-SGHC240 GH30-00288A
QMO01 MOTOR DC-SGHC240 GH31-00268A
QMP01 PBA MAIN-SGHC240 GH92-02900A
QMW02 PCT-COVER WINDOW MAIN GH72-34846A
QRF01 MPR-TAPE SHEET RF COVER GH74-27237A
QSC01 MPR-TAPE SHEET INTENNA COVER GH74-27823A
QSP01 SPEAKER 3001-002018
QRE01 ASSY CASE-REAR GH98-01616A
QIF01 PMO-IF COVER V4 GH72-36725A
QRF03 PMO-COVER EAR V4 GH72-35742A
5-2. Cellular phone Parts List

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Exploded View/Disassembly&Assembly Instructions
5-3
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Description SEC CODE
BAG PE 6902-000634
ADAPTOR-SGHD500 TA GH44-01451A
UNIT-EARPHONE(SIL) GH59-02472B
LABEL(P)-WATER SOAK GH68-02026A
LABEL(P)-WATER SOAK GH68-02026A
MANUAL-SFC GH68-04336A
LABEL(P)-BARCODE RUSSIA GH68-08494A
LABEL(R)-MAIN(SER) GH68-11762C
MANUAL USERS-EU RUSSIAN GH68-11868A
BOX-UNIT(SER) GH69-04190B
MPR-SPONGE INTENNA CARRIER GH74-27236A
MPR-TAPE RECEIVER GH74-29274A
MPR-TAPE EMI SHEET GH74-29420A

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Exploded View/Disassembly&Assembly Instructions
5-4
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1. Loosen a screw this four point form Rear.
2. And remove the IF cover.
1. Make the space between rear cover and
front cover using assembly stick.
2. And then widen space with hand and
separate 2 parts.
1. Separate the PBA from front cover
regard of 2 hooks and lift up.
1. Remove the tape from front cover.
2. And Remove the receiver from front cover
using removing hole.
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5-3. Disassembly&Assembly Instructions
―Disassembly

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Exploded View/Disassembly&Assembly Instructions
5-5
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1. Loosen the 4 hooks of intenna carrier from
PBA board and separate.
1. And separate the LCD module from PBA
board using removing hole with pinset.
1. Remove the LCD module from PBA board
using soldering tip.
1. Verify all kinds of elements after finishing
disassembling
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