Samsung SGH-X680 User manual

GSM TELEPHONE
SGH-X680
GSM TELEPHONE CONTENTS
1. Safety Precautions
2. Specification
3. Product Function
4. Array course control
5. Exploded View and Parts List
6. Disassembly and Assembly
instructions
7. MAIN Electrical Parts List
8. Block Diagrams
9. PCB Diagrams
10. Flow Chart of Troubleshooting
11. 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
3-1. Main Function ................................................................................3-1
4. Array course control
Software Downloading
4-1. Downloading Binary Files ................................................................4-2
4-2. Pre-requsite for Downloading ..........................................................4-2
4-3. S/W Downloader Program ...............................................................4-3
5. Exploded View and Parts List
5-1. Cellular phone Exploded View .........................................................5-1
5-2. Cellular phone Part list ...................................................................5-2
6. Disassembly and Assembly instructions
6-1. Disassembly ..................................................................................6-1
6-2. Assembly ......................................................................................6-4
7. MAIN Electrical Parts List
8. Block Diagrams
9. PCB Diagrams
10. Flow Chart of Troubleshooting
10-1. Baseband
10-1-1. Power ON ..............................................................................10-1

Contents
10-1-2. Initial ....................................................................................10-4
10-1-3. Sim Part ...............................................................................10-7
10-1-4. Charging Part ......................................................................10-10
10-1-5. Microphone Part ...................................................................10-12
10-1-6. Speaker Part ........................................................................10-14
10-1-7. LCD ....................................................................................10-17
10-1-8. Camera ...............................................................................10-19
10-2. RF
10-2-1. EGSM Receiver .....................................................................10-21
10-2-2. DCS Receiver........................................................................10-22
10-2-3. PCS Receiver.........................................................................10-23
10-2-4. GSM Transmitter...................................................................10-24
10-2-5. DCS/PCS Transmitter.............................................................10-25
10-2-6. Bluetooth Part ......................................................................10-28
11. 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
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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 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/
Bit Period
270.833 kbps
3.692 us
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
576.9 us
4.615 ms
Modulation 0.3 GMSK 0.3 GMSK 0.3 GMSK 0.3 GMSK
MS Power 33dBm~13dBm 33dBm~5dBm 30dBm~0dBm 30dBm~0dBm
Power Class 5pcl~15pcl 5pcl~19pcl 0pcl~15pcl 0pcl~15pcl
Sensiti vity -102 dBm -102 dBm -100 dBm -100 dBm
TDMA Mux 8 8 8 8
Cell Radius 35 Km 35 Km 2 Km -

Speclflcation
2-2
2-2. GSM Tx Power Class
TX Power
control level GSM900
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±3dBm
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±4dBm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
15 0±5 dBm
TX Power
control level PCS1900
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±4dBm
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
-Camera and camcorder
-Music player
-Bluetooth
-Web browser
-Get personal with photo caller ID
-Name card
-Multimedia Message Service (MMS)
-Java
-Calendar
-Voice recorder
-Alarm

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4. Array course control
4-1
This Document can not be used without Samsung's authorization
Test Jig (GH80-03307A)
Test Cable (GH39-00369A)
RF Test Cable (GH39-00397A)

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Array course control
4-2
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Software Downloading
4-1. Downloading Binary Files
• Three binary files for downloading X680.
– X680XXXXX.s3 : Main source code binary.
4-2. Pre-requsite for Downloading
• Downloader Program(OptiFlash.exe)
• X680 Mobile Phone
• Data Cable
• Binary files

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Array course control
4-3
This Document can not be used without Samsung's authorization
4-3. 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.
Set the everything else as the default values which are shown below

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Array course control
4-4
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3. Select the COM port when the download cable is connected
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

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Array course control
4-5
This Document can not be used without Samsung's authorization
4. Select the“Flash&Verify” -> “Browse”
Set the directory path and choose the latest s/w binary, for example
“X680XXXXX.s3”,for the downloader binary setting.
Make sure that not to change the reserved memory
regions.
In case of X680 the reserved regions are :
-0x24000000 – 0x2401ffff
-0x25fe0000– 0x25ffffff

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Array course control
4-6
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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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5. Exploded View and Parts List
5-1
This Document can not be used without Samsung's authorization
5-1. Cellular phone Exploded View
QFR01
QKP01
QMP01
QAN02
QRE01
QVK01
QRF03
QVO01
QCR06
QBA00
QLC01
QFL01
QCK01
QIF01
QME01
QBA01
QMI01
QCR06
QSC14
QHI01
QSP01
QMO01
QFU01
QCA01
QME03
QWD01
QRF01
QAN05

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Main Electrical Parts List
5-2
This Document can not be used without Samsung's authorization
Desgn LOC Discription SEC CODE
QAN02 INTENNA-SGHX680 GH42-00821A
QAN05 MEC-INTENNA CONTACT GH75-08168A
QBA00 ASSY-COVER-BATTERY GH98-00947A
QBA01 INNER BATTERY PACK-800MAH,BLK, GH43-01850A
QCA01 UNIT-CAMERA GH59-03068A
QCK01 PMO-CAM KEY GH72-30786A
QCR06 SCREW-MACHINE 6001-001155
QKP01 ASSY-KEY-KEYPAD(SAA/XEF) GH98-00948A
QLC01 MEA-LCD MODULE KIT GH97-06016A
QME01 UNIT-METAL DOME GH59-03140A
QME03 UNIT-CON TO CON GH59-03139A
QMI01 MICROPHONE-ASSY-5.25MM GH30-00177C
QMO01 MOTOR DC-SGHX680 GH31-00244A
QMP01 PBA MAIN-SGHX680 GH92-02702A
QRF01 MPR-COVER RF JACK SHEET GH74-24164A
QSC14 RMO-CUSHION F/L SCREW CAP GH73-07048A
QSP01 SPEAKER 3001-001955
QVK01 UNIT-VOLUME KEY GH59-03141A
QVO01 PMO-VOL KEY GH72-30785A
QRE01 ASSY-CASE-REAR SUB GH98-00946A
QRF03 PMO-COVER EARJACK GH72-30784A
QFR01 ASSY-CASE-FRONT SUB GH98-00943A
QIF01 PMO-COVER IF GH72-30750A
QFL01 ASSY ACCE-LOWER SUB GH98-00944A
QHI01 MEC-HINGE(CAN TYPE) GH75-04662A
QFU01 ASSY-CASE-UPPER SUB GH98-00945A
QWD01 ASSY-COVER-DUAL WINDOW GH98-01246A
5-2. Cellular phone Parts list

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Main Electrical Parts List
5-3
This Document can not be used without Samsung's authorization
Discription SEC CODE
BAG PE 6902-000297
ADAPTOR-SGHN288 TAD GH44-00184A
LABEL(P)-WATER SOAK GH68-02026A
LABEL(P)-WATER SOAK GH68-02026A
LABEL(R)-MAIN(EU) GH68-10705A
MANUAL USERS-EU PORTUGUESE GH68-10770A
MANUAL USERS-EU ENGLISH GH68-10924A
BOX(P)-UNIT MAIN(EU) GH69-03894A
CUSHION-CASE TA2 MA2 GH69-03895A
NPR-COVER LCD CON GH71-06463A
RMO-RUBBER COVER FOLDER GH73-07420A
MPR-BOHO VINYL LCD CONN GH74-15350A
MPR-VINYL BOHO F/L A GH74-23061A
MPR-VINYL BOHO F/U A GH74-23062A
MPR-CUSHION CON COVER GH74-23065A
MPR-TAPE HALL IC GH74-23689A
MPR-TAPE VOL KEY FPCB GH74-23690A
MPR-TAPE GASKET PCB GH74-23691A
MPR-TAPE GASKET LCD A GH74-23692A
MPR-CUSHION FORM GASKET LCD GH74-23693A
MPR-TAPE DUST PREVENTION GH74-23742A
MPR-CUSHION IF GASKET GH74-24166A
MPR-SPONGE REAR GASKET GH74-24196A
MPR-SPONGE REAR KEY GH74-24543A
MPR-VINYL BOHO DUAL WINDOW TOP GH74-24927A

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6. Disassembly and Assembly instructions
6-1
This Document can not be used without Samsung's authorization
6-1. Disassembly
1. Take to pieces screws of main rear
(4 points)
2. Open IF COVER
3. Open EAR COVER
※caution
1. Do not scratch or damage at main rear.
1. Disjoint the hooker atleftandrightportion
of main rear, separating main rear
referring figure.
※caution
1. Do not scratch or damage at main rear.
1
43
2
1. Separate LCD Connector.
2. Separate volume key FPCB from main front
by tweezers.
3. Separate PBA from main front ass'y.
4. Separate keypad from main front ass'y
※caution
1. Do not damage at LCD connector and
vloume key FPCB when separating.
1. Remove the front tape.
2. Push the hinge using a disassembly tool,
separating main front from LCD Ass'y
※caution
1. Do not scratch or damage at main front.
2. Handle with care LCD connector FPCB
when separating.

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Disassembly and Assembly instructions
6-2
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1. Remove the screw cap by tweezer.
2. Take to pieces screws(2 Points)
※caution
1. Do not scratch or damage at LCD ass'y.
2. Handle with care LCD connector FPCB.
1. Separate folder upper from folder lower
using a disassembly tool.
(Disjoint the hooker at left and right portion
of LCD ass'y)
※caution
1. Do not scratch or damage at LCD ass'y.
56
7 8
1. Separate the speaker firstly
2. Separate the vibration motor by tweezers
※caution
1. Do not damage at speaker and motor
wires.
2. Handle with care speaker and motor.
1. Disjoint the camera connector and separate
camera module from LCD lower.
※caution
1. Do not damage at camera FPCB.
SCREW CAP
POINTS

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Disassembly and Assembly instructions
6-3
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1. Separate LCD connector FPCB from LCD
lower.
※caution
1. Do not damage at LCD Connector and
FPCB.
1. 1. Separate the LCD ass'y from LCD lower.
※caution
1. Handle with care LCD Module because
attached LCD module on LCD lower by two-
faced attaching tape.
910