Samsung SGH-B300 User manual

GSM TELEPHONE
SGH-B300
1. Safety Precautions
2. Specification
3. Product Function
4. Array course control
5. Exploded View and Parts list
6. MAIN Electrical Parts List
7. Disassembly and Assembly
Instructions
8. Block Diagrams
9. PCB Diagrams
10. Chart of Troubleshooting
11. Reference data
GSM TELEPHONE CONTENTS

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. 04. 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
Phase 2
DCS1800
Phase 1
Freq. Band[MHz]
Uplink/Downlink
880~915
925~960
1710~1785
1805~1880
ARFCN range 0~124 & 975~1023 512~885
Tx/Rx spacing 45 MHz 95 MHz
Mod. Bit rate/
Bit Period
270.833 kbps
3.692 us
270.833 kbps
3.692 us
Time Slot Period/Frame
Period
576.9 us
4.615 ms
576.9 us
4.615 ms
Modulation 0.3 GMSK 0.3 GMSK
MS Power 33 dBm~5 dBm 30 dBm~0 dBm
Power Class 5 pcl ~19pcl 0pcl ~15pcl
Sensitivity -102 dBm -100 dBm
TDMA Mux 8 8
Cell Radius 35 Km 2 Km

Speclflcation
2-2
2-2. GSM Tx Power Class
TX Power
control level GSM900
5 33±2 dBm
6 31±2 dBm
7 29±2 dBm
8 27±2 dBm
9 25±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±3 dBm
18 7±3 dBm
19 5±3 dBm
TX Power
control level DCS1800
0 30±3 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

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5. Exploded View and Parts List
5-1
This Document can not be used without Samsung's authorization
5-1. Cellular phone Exploded View
QFU01
QFR01
QSH01
QME16
QLC01
QFL01
QCR06
QKP01
QME01
QCR12
QMP01
QMI01
QAN02
QRE01
QCR87
QBA01
QBA00
QMW02
QSP01
QLC02
QMO01
QSC01
QRF03

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Exploded View and Parts List
5-2
This Document can not be used without Samsung's authorization
Design LOC Discription SEC CODE
QAN02 INTENNA-SGHB300 GH42-01534A
QBA00 PMO COVER-BATTERY GH72-46670A
QBA01 INNER BATTERY PACK-750MAH,BLK, GH43-02483A
QCR06 SCREW-MACHINE 6001-001155
QCR12 SCREW-MACHINE 6001-001530
QCR87 SCREW-TAPPING 6002-001412
QFL01 ASSY CASE-LOWER GH98-07688A
QFU01 ASSY CASE-UPPER GH98-07689A
QKP01 ASSY KEYPAD-(XEF/DGA) GH98-07671A
QLC01 LCD-MODULE SGHB110L GH07-01241A
QLC02 ELA UNIT-SGHB300 LCD MODULE SV GH96-03067A
QME01 DOME SHEET-SGHB300 GH59-05506A
QME16 UNIT-SGHB300 CON TO CON GH59-05509A
QMI01 MICROPHONE-ASSY-SGHB300 GH30-00467A
QMO01 MOTOR DC-SGHZ130 GH31-00154C
QMP01 PBA MAIN-SGHB300 GH92-04468A
QMW02 PMO WINDOW-MAIN GH72-46665A
QRE01 ASSY CASE-REAR GH98-07686A
QSC01 TAPE-COVER SCREW LOWER GH74-38101A
QSH01 ASSY BRACKET-SHIELD CAN GH98-07685A
QSP01 SPEAKER 3001-002344
QFR01 ASSY CASE-FRONT GH98-07687A
QRF03 PMO COVER-EAR GH72-46664A
5-2. Cellular phone Parts list

SAMSUNG Proprietary-Contents may change without notice
7. Disassembly and Assembly Instructions
7-1
This Document can not be used without Samsung's authorization
7-1. Disassembly
1
43
2
1) Release SCREW 4POINT at Rear.
※Caution
1) Be careful not to make scratch.
1) Disjoint HOOK from up to down.
※Caution
1) Be careful Hook damage when you Disjoint a
REAR.
1) Seperate the IF COVER front FRONT.
1) Disjoint LCD CONNECTOR.
2) Separate PBA from FRONT.
①
②
③
IF COVER
HOOK 2M 카메라
PBA
HOOK
2POINT
LCD
CONNECT
OR

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Exploded View and Parts List
7-2
This Document can not be used without Samsung's authorization
5
87
6
1) Seperate UPPER from LOWER.
Release aHOOK which locate upside first.
※Caution
1) Be careful Hook damage when you disjoint a UPPER.
1) Sperate MOTOR from the LOWER
2) Sperate SPEAKER from the LOWER
1) Put tweezers to Front hole and Press
down aHinge.
2) Separate FRONTand FOLDER ASS'Y during
doing NO.1.
※Caution
1) Beware that you do not damage LCD F-PCB.
2) Be caredful that you do not make scratch when
you press down a Hinge.
1) Remove SCREW CAP using tweezers.(2POINT)
2) Release SCREW.
※Caution
1) Be careful not to make scratch and molding damage!
SCREW
2POINT
SPEAKER
MOTOR

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Exploded View and Parts List
7-3
This Document can not be used without Samsung's authorization
9
1) Seperate aFolder LOWER and LCD MODULE.
※Caution
1) Beware that you do not damage LCD F-PCB.
2) Beware that you do not damage F-PCB
when you passing F-PCB to hole of LOWER
LCD F-
PCB

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Exploded View and Parts List
7-4
This Document can not be used without Samsung's authorization
7-2. Assembly
1
43
2
1) Twist the MOTOR wire twice, then put
into the LOWER
※Caution
1) Arrange WIRE not to be interfered
with other components.
1) Assemble Folder Lower and Folder Upper
from upside.
※Caution
1) Be careful not to make scratch and molding
damage.
2) Check GAP is exist after finish assembly.
1) Put the SPEAKER on the UPPER
※Caution
1) Arrange WIRE not to be interfered
with other components.
1) Put LCD F-PCB into the hole of LOWER.
2) Put LCD Ass'y in Folder Lower.
※Caution
1) Be careful not to make scratch and molding
damage.
2) Beware that you do not damage F-PCB
when you insert F-PCB to hole of LOWER
Twiste twice