Samsung SGH-D840 User manual

GSM TELEPHONE
SGH-D840
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 Level ......................................................................2-2
2-3. EDGE TX Power Level ....................................................................2-3
3. Product Function
4. Array course control
Software Downloading
4-1. Downloading Binary Files ................................................................4-2
4-2. Prerequisite ...................................................................................4-2
4-3. S/W Downloader Program ...............................................................4-2
5. Exploded View and Parts List
5-1. Cellular phone Exploded View .........................................................5-1
5-2. Cellular phone Part list ...................................................................5-2
5-3. Disassembly ..................................................................................5-3
5-4. Assembly ......................................................................................5-5
5-5. LCD Kit Assembly ..........................................................................5-7
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. Charging Part ............................................................................9-7
9-1-5. Microphone Part ........................................................................9-8
9-1-6. Speaker Part ...........................................................................9-10
9-1-7. Camera Part ............................................................................9-13
9-1-8. LCD ........................................................................................9-16
9-2. RF
9-2-1. EGSM RX ................................................................................9-18
9-2-2. DCS RX ..................................................................................9-19
9-2-3. PCS RX ...................................................................................9-20
9-2-4. EGSM TX ................................................................................9-22
9-2-5. DCS & PCS TX ........................................................................9-23
9-2-6. BLUETOOTH ............................................................................9-27
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.

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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 900 DCS1800 PCS1900
Freq. Band[MHz]
Uplink/Downlink
880~915
925~960
1710~1785
1805~1880
1850~1910
1930~1990
ARFCN range 0~124
&975~1023 512~885 512~810
Tx/Rx spacing 45 MHz 95 MHz 80 MHz
Mod. Bit
rate/
Bit Period
GPRS 270.833 Kbps
3.692 us
270.833 Kbps
3.692 us
270.833 Kbps
3.692 us
EDGE 812.5 Kbps
3.692 us
812.5 Kbps
3.692 us
812.5 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
GPRS 0.3 GMSK 0.3 GMSK 0.3 GMSK
EDGE 8PSK 8PSK 8PSK
MS Power
GPRS 33 dBm~5 dBm 30 dBm~0 dBm 30 dBm~0 dBm
EDGE 27~5 dBm 26~0 dBm 26~0 dBm
Power
Level
GPRS 5pcl~19pcl 0pcl~15pcl 0pcl~15pcl
EDGE 8~19(class E2) 2~15(class E2) 2~15(class E2)
Sensitivity -102 dBm -100 dBm -102 dBm
TDMA Mux 8 8 8
Cell Radius 35 Km 2 Km 2 Km
Operation Temperature -20 ℃~45 ℃-20 ℃~45 ℃20 ℃~45 ℃
Supply Voltage 3.7 V 3.7 V 3.7 V
Size and Weight
Dimention : 11.95(H)x52(W)x99(D)mm
Weight :98.6g(with standard battery)

Specification
2-2
2-2. GMSK TX power Level
TX Power
control
level
GSM900
5 33±2 dBm
6 31±3 dBm
7 29±3 dBm
8 27±3 dBm
9 25±3 dBm
10 23±3 dBm
11 21±3 dBm
12 19±3 dBm
13 17±3 dBm
14 15±3 dBm
15 13±3 dBm
16 11±5 dBm
17 9±5 dBm
18 7±5 dBm
19 5±5 dBm
TX Power
control
level
DCS1800
0 30±2 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±4d Bm
12 6±4 dBm
13 4±4 dBm
14 2±5 dBm
15 0±5 dBm
TX Power
control
level
PCS1900
0 30±2 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

Specification
2-3
2-3. EDGE TX Power Level
TX Power
control
level
GSM850
827±3dBm
925±3dBm
10 23±3 dBm
11 21±3 dBm
12 19±3 dBm
13 17±3 dBm
14 15±3 dBm
15 13±3 dBm
16 11±5 dBm
17 9±5 dBm
18 7±5 dBm
19 5±5 dBm
TX Power
control
level
DCS1800
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
TX Power
control
level
PCS1900
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
-Camera and camcorder
-Music player
-File viewer
-Bluetooth
-Phone to TV
-Image editor
-Photo printing
-Multimedia Message Service (MMS)
-E-mail
-Offline mode
-Web browser

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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 (GH39-00501A)
RF Test Cable (GH39-00599A)