Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung GSM Samsung SGH-D840 service manual
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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
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.
1-1
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
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.
1-2
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
2. Specification
2-1. GSM General Specification
GSM 900 DCS1800 PCS1900
F r e q . Ba n d [ M Hz ] 88 0~9 15 1710~1785 1850~1910
Uplink/ Downlink 92 5~9 60 1805~1880 1930~1990
0~12 4
AR FC N range 512~885 512~810
& 9 75 ~10 23
T x /Rx s pacing 45 M Hz 95 M Hz 80 M Hz
270.833 Kbp s 270.833 Kbp s 270.833 Kbp s
M od . Bit G P RS
3.692 us 3.692 us 3.692 us
rate/
812.5 K bp s 812.5 K bp s 812.5 K bp s
Bit P eriod EDGE
3.692 us 3.692 us 3.692 us
T i m e Slo t 576.9 u s 576.9 u s 576.9 u s
Period/Frame Per iod 4.615 ms 4.615 ms 4.615 ms
G P RS 0.3 GM S K 0.3 GM S K 0.3 G MS K
Modu lation
EDGE 8 P SK 8 P SK 8 P SK
G P RS 33 dBm~5 dBm 30 dBm~0 dBm 30 dBm~0 dBm
M S P o w er
ED G E 27~5 dBm 26~0 dBm 26~0 dBm
G P RS 5 pcl~19 pcl 0 pcl~15 pcl 0 pcl~15 pcl
P o wer
Leve l
EDGE 8~ 19(clas s E 2) 2~15(class E2) 2~15(class E2)
Sens itivity -102 dBm -100 dBm -102 dBm
T DM A Mu x 8 8 8
Cell Radius 35 Km 2 Km 2 Km
O p e r a t i o n Te mp e r a t u r e -20 ~45 -20 ~45 20 ~45
S u pply V oltage 3.7 V 3.7 V 3.7 V
Di ment ion : 11.95( H) x52(W)x99( D)m m
Size and Weig h t
Weight :98. 6g( wi th stan dard b att ery)
2-1
Specification
2-2. GMSK TX power Level
TX Power TX Power TX Power
control GSM900 control DCS1800 control PCS1900
level level level
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