Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung GSM Samsung SGH-Z620 service manual
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GSM TELEPHONE
SGH-Z620
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
This Service Manual is a property of Samsung Electronics Co.,Ltd. Samsung Electronics Co.,Ltd.
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law. 2006. 09. Rev.1.0
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
3. Product Function
4. Array course control
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 Parts list ..............................................................5-2
5-3. Disassembly ...............................................................................5-4
5-4. Assembly ...................................................................................5-6
6. MAIN Electrical Parts List
7. Block Diagrams
8. PCB Diagrams
Contents
9. Flow Chart of Troubleshooting
9-1. Baseband ................................................................................9-1
9-1-1. Power ON ..........................................................................9-1
9-1-2. Initial ................................................................................9-4
9-1-3. SIM Part .............................................................................9-6
9-1-4. Microphone Part .................................................................9-7
9-1-5. Speaker Part_1(MP3, SPEAKER PHONE) ................................9-8
9-1-6. Speaker Part_2(RECEIVER) ................................................9-10
9-1-7. Charging Part ...................................................................9-11
9-2. RF .........................................................................................9-13
9-2-1. EGSM RX .........................................................................9-13
9-2-2. DCS RX ...........................................................................9-15
9-2-3. PCS RX ............................................................................9-16
9-2-4. EGSM TX .........................................................................9-17
9-2-5. DCS TX ...........................................................................9-18
9-2-6. PCS TX ............................................................................9-19
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/WCDMA General Specification
EGSM 900 DC S1800
PCS1900 WCDMA
Pha s e 2 Phase 1
Freq .
880~915 1710~1785 1850~1910 1920~1980
Band[MHz]
925~960 1805~1880 1930~1990 2110~2170
Upli nk/ Dow nl in k
0~124 &
AR FC N r a ng e 512~885 512~810 10562~10838
975~1023
Tx/R x sp a cin g 45 MHz 95 MHz 80 MHz 190 MHz
Mod. Bit rate/ 270.833 kbps 270.833 kbps 270.833 kbps
3.84 Mcps/s
Bit Period 3.692 us 3.692 us 3.692 us
T im e S lo t
576.9 us 576.9 us 576.9 us
P er io d /F ram e 10 ms
4.615 ms 4.615 ms 4.615 ms
P e ri od
UL:2BPSk
M od u lati on 0.3 GMSK 0.3 GMSK 0.3 GMSK
DL:QPSK
MAX:24(+1,-3) dBm
M S P ow er 33 dBm~5 dBm 30 dBm~0 dBm 30 dBm~0 dBm
MIN:<-50 dBm
P ow er Cl as s 5 pcl ~ 19 pcl 0 pcl ~ 15 pcl 0 pcl ~ 15 pcl CLASS3
Sen si ti vit y -102 dBm -100 dBm -100 dBm -106.7 dBm
TDM A M ux 8 8 8 -
C ell Rad iu s 35 Km 2 Km - -
2-1
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Specification
2-2. GSM TX power class
TX Power TX Power TX Power
EGSM900 DCS1800 PCS1900
control level control level control level
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