Mobile Device 
 
SM-G9550 Common 
 
 
 
CONTENTS 
1.  Safety Precautions 
2.  Specification 
3.  Product Function 
4.   Exploded View and Parts list  
5.   MAIN Electrical Parts List 
6.   Level 1 Repair 
7.   Level 2 Repair 
8.   Level 3 Repair 
9.   Reference data 
   
 Notice: All functionality, features, specifications, 
and other product information provided in this 
document, including but not limited to, benefits, 
design, pricing, components, performance, 
availability, and capabiliti-es of the product are 
subject to change without notice. Samsung 
reserves the right to alter this doc-ument or the 
product described herein at anytime, without 
obligation to provide notification of such 
changes. 
 
 
 
 
 
 
 
 
 
 
 
 
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. 
 
 
 
 
 
 
 
 
1. Safety Precautions 
 
 
1-2. ESD(Electrostatically Sensitive Devices) Precaution   
 
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. 
 
 
 
 
 
2. Specification 
 
 
2-1. GSM & WCDMA General Specification 
 
  
GSM850 
EGSM 900 
DCS1800 
PCS1900 
WCDMA 
2100 
WCDMA 
1900 
WCMDA 
850 
Freq.   
Band[MHz] 
Uplink/ 
Downlink 
824.2~848.8 
869.2~893.8 
876.2~914.8 
921.2~959.8 
.8 
.8 
.8 
.8 
1710.2~1784
1850.2~1909
1922.4~1977
1852.4~1907
1805.2~1879
1930.2~1989
2112.4~2167
1932.4~1987
826.4~846.6
871.4~891.6
.6 
.6 
UL: 
DL: 
8 
.6 
.6 
UL: 
DL: 
9612~9888 
10562~1083
9262~9538 
4132~4233
9662~9938 
4357~4458
UL: 
DL: 
ARFCN 
range 
128~251 
0~124 
& 975~1023 
512~885 
512~810 
Tx/Rx 
spacing 
45MHz 
45MHz 
95MHz 
80MHz 
190MHz 
80MHz 
45MHz 
Mod. Bit 
rate/ 
Bit Period 
270.833kbps 
3.692us 
270.833kbps 
3.692us 
270.833kbps
3.692us 
270.833kbps
3.692us 
3.84Mcps 
3.84Mcps 
3.84Mcps 
Time Slot 
Period/ 
Frame 
Period 
576.9us 
4.615ms 
576.9us 
4.615ms 
576.9us 
4.615ms 
576.9us 
4.615ms 
FrameLengt
FrameLengt
FrameLengt
h: 
10ms 
h: 
10ms 
h: 
10ms 
Slotlength: 
0.667ms 
Slotlength: 
0.667ms 
Slotlength:
0.667ms 
Modulation 
0.3GMSK 
0.3GMSK 
0.3GMSK 
0.3GMSK  QPSK/16QA
M 
QPSK/16QA
M 
QPSK/16QA
M 
MS Power  33dBm~5dB
m 
32.5dBm~5d
Bm 
29.5dBm~0d
Bm 
29.5dBm~0d
Bm 
24dBm~ 
-50dBm 
24dBm~ 
-50dBm 
24dBm~ 
-50dBm 
Power Class  5pcl ~ 19pcl  5pcl ~ 19pcl 
0pcl ~ 15pcl
0pcl ~ 15pcl
3(max+24dBm)  3(max+24dBm) 3(max+24dBm)
Sensitivity 
-102dBm 
-102dBm 
-100dBm 
-100dBm 
-106.7dBm 
-104.7dBm 
-104.7dBm
TDMA Mux 
8 
8 
8 
8 
- 
- 
- 
Cell Radius 
35Km 
35Km 
35Km 
35Km 
2Km 
2Km 
2Km 
 
 
 
 
 
2. Specification 
 
 
 
Freq. 
Band[MHz] 
Uplink/ 
Downlink 
ARFCN range 
WCDMA 
900 
882.4~912.6 
927.4~957.6 
TDSCDMA 
2000 
TDSCDMA 
1900 
2010 ~ 2025 
1880 ~ 1920 
UL: 
DL: 
9262~9538 
9662~9938 
10050 ~ 10125 
9400 ~ 9600 
Tx/Rx spacing 
45MHz 
- 
- 
Mod. Bit rate/ 
Bit Period 
Time Slot Period/ 
Frame Period 
3.84Mcps 
1.28Mcps 
1.28Mcps 
FrameLength: 
10ms 
Slotlength: 
0.667ms 
FrameLength: 
10ms 
Slotlength: 
0.675ms 
FrameLength: 
10ms 
Slotlength: 
0.675ms 
Modulation 
QPSK/16QAM 
QPSK/8PSK 
QPSK/8PSK 
MS Power 
24dBm~ 
-50dBm 
24dBm~ 
-48dBm 
24dBm~ 
-48dBm 
Power Class 
3(max+24dBm) 
2(max+24dBm) 
2(max+24dBm) 
Sensitivity 
-103.7dBm 
-107.3dBm 
-107.3dBm 
TDMA Mux 
Cell Radius 
- 
2Km 
- 
- 
11.25Km 
11.25Km 
 
 
 
 
 
2. Specification 
 
 
2-2. LTE General Specification 
 
 
LTE Band1 
LTE Band2 
LTE Band3 
LTE Band4 
LTE Band5 
Freq. 
Band[MHz] 
Uplink/ 
Downlink 
ARFCN range 
1920~1980 
2110~2170 
1850~1910 
1930~1990 
1710~1785 
1805~1880 
1710~1755 
2110~2155 
824~849 
869~894 
UL: 
DL: 
0~599 
UL: 
DL: 
UL: 
DL: 
UL: 
DL: 
UL: 
DL: 
18000~18599 
18600~19199 
19200~19949 
19950~20399 
20400~20649 
600~1199 
1200~1949 
1950~2399 
2400~2649 
Tx/Rx spacing 
190MHz 
80MHz 
95MHz 
400MHz 
45MHz 
Channel 
Bandwidth 
5/10/15/20 MHz  1.4/3/5/10/15/20 
MHz 
1.4/3/5/10/15/20 
MHz 
1.4/3/5/10/15/20 
MHz 
1.4/3/5/10 MHz
Modulation 
QPSK,16/64QAM  QPSK,16/64QAM QPSK,16/64QAM QPSK,16/64QAM  QPSK,16/64QAM
MS Power 
(MPR) 
Sensitivit 
(QPSK) 
(BW 10MHz) 
-35~25.7 dBm 
-35~25.7 dBm 
-35~25.7 dBm 
-35~25.7 dBm 
-35~25.7 dBm 
-96.3 dBm 
-94.3 dBm 
-93.3 dBm 
-96.3 dBm 
-94.3 dBm 
Cell Radius 
>5Km 
>5Km 
>5Km 
>5Km 
>5Km 
 
 
 
 
 
2. Specification 
 
 
 
LTE Band7  
LTE Band8  
LTE Band12  
LTE Band13  
LTE Band17  
Freq.  
Band[MHz]  
Uplink/  
Downlink  
ARFCN range  
2500~2570  
2620~2690  
880~915  
925~960  
699~716  
729~746  
777~787  
746~756  
704~716  
734~746  
UL:  
DL:  
2750~3449  
UL:  
DL:  
UL:  
DL:  
UL: 
DL: 
UL:  
DL:  
20750~21449  
2712~2863  
23010~23179  
23180~23279  
23730~23849  
2937~3088  
5010~5179  
5180~5279  
5730~5849  
Tx/Rx spacing  
120MHz  
45MHz  
30MHz  
-31MHz  
30MHz  
Channel 
Bandwidth  
5/10/15/20 MHz   1.4/3/5/10 MHz
1.4/3/5/10 MHz
5/10 MHz  
5/10 MHz  
Modulation  
QPSK,16/64QAM  QPSK,16/64QAM QPSK,16/64QAM QPSK,16/64QAM  QPSK,16/64QAM
MS Power  
(MPR)  
Sensitivit  
(QPSK)  
(BW 10MHz)  
-35~25.7 dBm  
-35~25.7 dBm  
-35~25.7 dBm  
-35~25.7 dBm  
-35~25.7 dBm  
-94.3 dBm  
-93.3 dBm  
-93.3 dBm  
-93.3 dBm  
-93.3 dBm  
Cell Radius  
>5Km  
>5Km  
>5Km  
>5Km  
>5Km