Samsung SGH-G400 User manual

GSM TELEPHONE
SGH-G400
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
11. Disassembly and Assembly
Instructions
efrcom

This Service Manual is aproperty of Samsung Electronics Co.,Ltd.
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law.
Samsung Electronics Co.,Ltd.
2008. 07. Rev.1.0
ⓒ
Country Web Site
North America service.samsungportal.com
Latin America latin.samsungportal.com
CIS cis.samsungportal.com
Europe europe.samsungportal.com
China china.samsungportal.com
Asia asia.samsungportal.com
Mideast &Africa mea.samsungportal.com
GSPN (Global Service Partner Network)

2. Specification
2-1
2-1. GSM General Specification
EGSM 900 DCS 1800 PCS 1900 WCDMA2100
Freq.
Band[MHz]
Uplink/Downlink
880~915
925~960
1710~1785
1805~1880
1850~1910
1930~1990
1920~1980
2110~2170
ARFCN range 0~124 &
975~1023 512~885 512~810 UL:9612~9888 DL:10562~10838
Tx/Rx spacing 45MHz 95MHz 80MHz 190MHz
Mod. Bit rate/
Bit Period
270.833kbps
3.692us
270.833kbps
3.692us
270.833kbps
3.692us 3.84Mcps
Time Slot
Period/Frame
Period
576.9us
4.615ms
576.9us
4.615ms
576.9us
4.615ms
Frame length : 10ms
Slot length: 0.667ms
Modulation 0.3GMSK 0.3GMSK 0.3GMSK QPSK
HQPSK
MS Power 33dBm~5dBm 30dBm~0dBm 30dBm~0dBm 24dBm~ -50dBm
Power Class 4
(max +33dBm)
1
(max +30dBm)
1
(max +30dBm)
3
(max +24dBm)
Sensitivity -102dBm -100dBm -100dBm -106.7dBm
TDMA Mux 8 8 8 NA
Cell Radius 35Km 2Km 2Km 2Km

Speclflcation
2-2
TX Power
control level GSM900
533±2
dBm
631±2
dBm
729±2
dBm
827±2
dBm
925±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
030±3
dBm
128±3
dBm
226±3
dBm
324±3
dBm
422±3
dBm
520±3
dBm
618±3
dBm
716±3
dBm
814±3
dBm
912±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 PCS1800
030±3
dBm
128±3
dBm
226±3
dBm
324±3
dBm
422±3
dBm
520±3
dBm
618±3
dBm
716±3
dBm
814±3
dBm
912±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
2-2. GSM Tx Power Class

SAMSUNG Proprietary-Contents may change without notice
3. Product Function
3-1
This Document can not be used without Samsung's authorization
Main Function
▪Extended GSM 900MHz &DCS1800MHz &PCS1900MHz
&WCDMA/HSDPA2100MHz Quad Band
▪HSDPA 7.2Mbps
▪GPRS Multi-slot Class 12
▪5Megapixel AF Camera
▪240x320,262K TFT LCD 2.22” (DUAL LCD)
▪Music Library, FM Radio with RDS
▪Video Playback &Recording
▪USB 2.0, BT 2.0
▪Downloadable Game via JAVA
▪72 Poly, CMX
▪Sending Photo &Video by MMS or E-Mail
▪880 mAh Battery

SAMSUNG Proprietary-Contents may change without notice
10. Reference data
10-1
This Document can not be used without Samsung's authorization
Reference Abbreviation
-AAC:Advanced Audio Coding.
-AVC :Advanced Video Coding.
-BER :Bit Error Rate
-BPSK:Binary Phase Shift Keying
-CA :Conditional Access
-CDM :Code Division Multiplexing
-C/I :Carrier to Interference
-DMB :Digital Multimedia Broadcasting
-EN :European Standard
-ES :Elementary Stream
-ETSI:European Telecommunications Standards Institute
-MPEG:Moving Picture Experts Group
-PN :Pseudo-random Noise
-PS :Pilot Symbol
-QPSK:Quadrature Phase Shift Keying
-RS :Reed-Solomon
-SI :Service Information
-TDM :Time Division Multiplexing
-TS :Transport Stream

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 specificity of cellular phone is sensitive for
surrounding interference(RF noise).
●Be careful to use akind of magnetic object or tool, because performance of parts is
damaged by the influence of magnetic force.
●Surely use astandard screwdriver when you disassemble this product, otherwise screw will
be worn away.
●Use athicken twisted wire when you measure level.
Athicken 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 arepair of battery charger is
dangerous when tuning ON/OFF PBA and Connector after disassembling 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.

SAMSUNG Proprietary-Contents may change without notice
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 easily 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 acircuit board.

SAMSUNG Proprietary-Contents may change without notice
4. Array course control
4-1
This Document can not be used without Samsung's authorization
4-1. Software Adjustments
1. JIG(GH80-03308A): Download, Trace, Calibration, etc
2. 0.4M Test cable(GH39-00990A): JIG to phone
3. 1.5M Test cable(GH39-00993A): JIG to phone

SAMSUNG Proprietary-Contents may change without notice
Array course control
4-2
This Document can not be used without Samsung's authorization
4.Travel Adaptor(GH44-01702A)
5.Data Link Cable(GH39-00922A): USB cable
6.Serial cable(LJ39-00013A) :PC to JIG