Distribution, transmi ssion, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohib ited.
Confidential and pr oprietary-the c ontents in this ser vice guide subject to change wi thout prior noti ce
2. Specification
control level
control level
control level
control level
2-2. GSM Tx Power Class
TX Power
5
6 31±2 dBm 6 31±2 dBm 1 28±3 dBm 1 28±3 dBm
7 29±2 dBm 7 29±2 dBm 2 26±3 dBm 2 26±3 dBm
8 27±2 dBm 8 27±2 dBm 3 24±3 dBm 3 24±3 dBm
9 25±2 dBm 9 25±2 dBm 4 22±3 dBm 4 22±3 dBm
10 23±2 dBm 10 23±2 dBm 5 20±3 dBm 5 20±3 dBm
11 21±2 dBm 11 21±2 dBm 6 18±3 dBm 6 18±3 dBm
12 19±2 dBm 12 19±2 dBm 7 16±3 dBm 7 16±3 dBm
GSM850
33±2 dBm 5 33±2 dBm 0 30±3 dBm 0 30±3 dBm
TX Power
EGSM900
TX Power
DCS1800
TX Power
PCS1900
13 17±2 dBm 13 17±2 dBm 8 14±3 dBm 8 14±3 dBm
14 15±2 dBm 14 15±2 dBm 9 12±4 dBm 9 12±4 dBm
15 13±2 dBm 15 13±2 dBm 10 10±4 dBm 10 10±4 dBm
16 11±3 dBm 16 11±3 dBm 11 8±4 dBm 11 8±4 dBm
17 9±3dBm 17 9±3dBm 12 6±4 dBm 12 6±4 dBm
18 7±3 dBm 18 7±3 dBm 13 4±4 dBm 13 4±4 dBm
19 5±3 dBm 19 5±3 dBm 14 2±5 dBm 14 2±5 dBm
- -
- -
15 0±5 dBm 15 0±5 dBm
Confidential and pr oprietary-the c ontents in this ser vice guide subject to change wi thout prior noti ce
Distribution, transmi ssion, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohib ited.
Distribution, transmi ssion, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohib ited.
Confidential and pr oprietary-the c ontents in this ser vice guide subject to change wi thout prior noti ce
Confidential and pr oprietary-the c ontents in this ser vice guide subject to change wi thout prior noti ce
Distribution, transmi ssion, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohib ited.
Distribution, transmi ssion, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohib ited.
Confidential and pr oprietary-the c ontents in this ser vice guide subject to change wi thout prior noti ce
Confidential and pr oprietary-the c ontents in this ser vice guide subject to change wi thout prior noti ce
Distribution, transmi ssion, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohib ited.
Confidential and proprietary-the contents in this service guide subject to change without prior notice
Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
9. Reference Abbreviate
Reference Abbreviate
― 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
Confidential and proprietary-the contents in this service guide subject to change without prior notice
Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
1. Safety Precautions
1-1. Repair Precaution
Before attempting any repair or detailed tuning, shield the device from RF noise or static
electricity discharges.
Use only demagnetized tools that are specifically designed for small electronic repairs,
as most electronic parts are sensitive to electromagnetic forces.
Use only high quality screwdrivers when servicing products. Low quality screwdrivers can
easily damage the heads of screws.
Use only conductor wire of the properly gauge and insulation for low resistance, because of the low margin
of error of most testing equipment.
We recommend 22-gauge twisted copper wire.
Hand-soldering is not recommended, because printed circuit boards (PCBs) can be easily
damaged, even with relatively low heat. Never use a soldering iron with a power rating of
more than 100 watts and use only lead-free solder with a melting point below 250°C (482°F).
Prior to disassembling the battery charger for repair, ensure that the AC power is disconnected.
Always use the replacement parts that are registered in the SEC system. Third-party replacement parts
may not function properly.
Confidential and proprietary-the contents in this service guide subject to change without prior notice
Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
Many semiconductors and ESDs in electronic devices are particularly sensitive to static discharge and can
be easily damaged by it. We recommend protecting these components with conductive anti-static bags
when you store or transport them.
Always use an anti-static strap or wristband and remove electrostatic buildup or dissipate
static electricity from your body before repairing ESDs.
Ensure that soldering irons have AC adapter with ground wires and that the ground wires are properly
connected.
Use only desoldering tools with plastic tips to prevent static discharge.
Properly shield the work environment from accidental electrostatic discharge before opening
packages containing ESDs.
The potential for static electricity discharge may be increased in low humidity environments,
such as air-conditioned rooms. Increase the airflow to the working area to decrease the
chance of accidental static electricity discharges.
Confidential and proprietary-the contents in this service guide subject to change without prior notice
Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
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