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GSM TELEPHONE
SGH-D428
GSM TELEPHONE CONTENTS
1. Specification
2. Flow Chart of Troubleshooting
3. Exploded Views and Parts List
4. Electrical Parts List
5. Block Diagrams
6. PCB Diagrams
Samsung Electronics Co.,Ltd. Dec. 2004
This Service Manual is a property of Samsung Electronics Co.,Ltd. Printed in Korea.
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law. Code No.: GH68-06337A
BASIC.
1. SGH-D428 Specification
1. GSM General Specification
GSM900 E G S M 9 00 DCS1800
PC S1900
Ph ase 1 Ph ase 2 Ph ase 1
Freq. Ban d [M Hz ] 89 0~ 91 5 88 0~ 91 5 1 71 0~ 1 78 5 18 50 ~1 91 0
Upl in k/Downl in k 93 5~ 96 0 92 5~ 96 0 1 80 5~ 1 88 0 19 30 ~1 99 0
0 ~ 1 24 &
A RF C N ra n g e 1 ~ 1 24 51 2~8 85 5 12 ~ 8 10
9 75 ~ 10 23
Tx/Rx spaci ng 45 MHz 45 MHz 95 MHz 8 0M H z
Mod. Bit rat e/ 270.833kbp s 2 70 . 8 33 k b ps 270.833kbp s 27 0. 83 3kb p s
Bit Period 3.692us 3.692us 3.692us 3. 69 2u s
Tim e Sl ot
576.9us 576.9us 576.9us 57 6. 9u s
P eri od /F rame
4. 61 5m s 4 .6 15 m s 4. 61 5ms 4. 61 5ms
Peri od
Modu lat ion 0. 3GM SK 0. 3GM S K 0. 3GM SK 0.3GMSK
M S Power 3 3d B m ~ 13 dBm 33dBm~5dBm 3 0d B m ~ 0 d Bm 30 d Bm ~0d Bm
P ow e r Cl a ss 5pcl ~ 15pcl 5pcl ~ 19pcl 0pcl ~ 15pcl 0pcl ~ 15pcl
S e nsi ti vit y -102dBm - 10 2d B m -100dBm -100dBm
TDM A Mu x 8 8 8 8
Cell Radiu s 35 Km 35 Km 2Km -
1-1
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
SGH-D428 Specification
2. GSM TX power class
TX Power GSM900 TX Power DCS1800 TX Power PCS1900
control level control level control level
5 33