Samsung SGH-E490 service manual.pdf

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GSM TELEPHONE
SGH-E490
GSM TELEPHONE
1.
2.
3.
4.
5.
6.
7.
8.
9.
CONTENTS
Specification
Exploded View and Parts list
Chart of Troubleshooting
Array course control
Block Diagrams
PCB Diagrams
MAIN Electrical Parts List
Reference data
Safety Precautions
10. Product Function
Contents
1. Specification
1-1. GSM General Specification .......................................................................................1-1
1-2. GSM TX power class ...............................................................................................1-2
2. Exploded View and Parts list
2-1. Cellular phone Exploded View ..................................................................................2-1
2-2. Cellular phone Parts list ............................................................................................2-2
2-3. Disassembly ...............................................................................................................2-9
2-4. Assembly ..................................................................................................................2-11
3. Chart of Troubleshooting
3-1. Baseband ............................................................................................................3-1
3-1-1. Power ON .....................................................................................................3-1
3-1-2. System Initial ................................................................................................3-5
3-1-3. SIM Part .......................................................................................................3-8
3-1-4. Charging Part .............................................................................................3-10
3-1-5. Microphone Part .........................................................................................3-12
3-1-6. Speaker Part ..............................................................................................3-15
3-1-7. Camera Part ..............................................................................................3-18
3-1-8. LCD .............................................................................................................3-21
3-2. RF ......................................................................................................................3-13
3-2-1. EGSM Rx ...................................................................................................3-23
3-2-2. DCS Rx ......................................................................................................3-24
3-2-3. PCS Rx ......................................................................................................3-25
3-2-4. EGSM Tx ...................................................................................................3-27
3-2-4. DCS & PCS Tx .........................................................................................3-28
3-2-6. BLUETOOTH ..............................................................................................3-30
Contents
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. Block Diagrams
6. PCB Diagrams
7. MAIN Electrical Parts List
8. Reference data
8-1. Reference Abbreviate ..............................................................................................8-1
9. Safety Precautions
9-1. Repair Precaution ......................................................................................................9-1
9-2. ESD(Electrostaically Sensitive Devices) Precaution ................................................9-2
10. Product Function
1. Specification
1-1. GSM General Specification
GSM900
Phase 1
Fr eq. Band [MHz]
Uplink/ Downlink
ARFCN ran ge
Tx/Rx spacin g
Mod. Bit ra te/
Bi t Peri od
Tim e Slot
Per iod/ Fr ame
Period
Mod ulat ion
MS Power
Power Cl ass
Sensitivity
TDMA M ux
Cell Radius
890~9 15
935~9 60
1~12 4
45MHz
270.8 33kbps
3.69 2us
576. 9us
4 .615ms
0.3G MSK
3 3dBm~1 3dBm
5pcl ~ 1 5pcl
- 102dBm
8
35Km
EG SM 900
Phase 2
880~ 915
925~ 960
0~ 124 &
975~ 1023
45MHz
270. 833kbps
3.6 92us
576. 9us
4.615 ms
0.3 GMSK
33dBm~5dBm
5pcl ~ 19pcl
- 102dBm
8
35 Km
DCS1 800
Phase 1
1710~1 785
1805~1 880
512~8 85
95MHz
2 70.83 3kbps
3.69 2us
576. 9us
4 .615ms
0.3G MSK
3 0dBm~0 dBm
0pcl ~ 15pcl
- 100dBm
8
2Km
PCS190 0
18 50~191 0
19 30~199 0
5 12~810
80MHz
27 0.833 kbps
3 .692u s
5 76.9u s
4. 615ms
0 .3G M SK
30 dBm~0d Bm
0pcl ~ 15pcl
-10 0dBm
8
-
1-1
Speclflcation
1-2. GSM Tx Power Class
TX Power
control level
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
TX Power
control level
0
1
2
3
4
5
6
7
8
9
13±2 dBm
10
11±3 dBm
11
9±3dBm
7±3 dBm
5±3 dBm
12
13
14
15
6±4 dBm
4±4 dBm
2±5 dBm
0±5 dBm
12
13
14
15
6±4 dBm
4±4 dBm
2±5 dBm
0±5 dBm
8±4dBm
11
8±4dBm
10±4 dBm
10
10±4 dBm
TX Power
control level
0
1
2
3
4
5
6
7
8
9
GSM900
DCS1800
PCS1900
33±2 dBm
31±2 dBm
29±2 dBm
27±2 dBm
25±2 dBm
23±2 dBm
21±2 dBm
19±2 dBm
17±2 dBm
15±2 dBm
30±3 dBm
28±3 dBm
26±3 dBm
24±3 dBm
22±3 dBm
20±3 dBm
18±3 dBm
16±3 dBm
14±3 dBm
12±4 dBm
30±3 dBm
28±3 dBm
26±3 dBm
24±3 dBm
22±3 dBm
20±3 dBm
18±3 dBm
16±3 dBm
14±3 dBm
12±4 dBm
1-2

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