Samsung SGH-C140 service manual.pdf

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GSM TELEPHONE
SGH-C140
GSM TELEPHONE
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10.
CONTENTS
Specification
Exploded View and Parts List
Flow Chart of Troubleshooting
Array course control
Block Diagrams
PCB Diagrams
MAIN Electrical Parts List
Reference data
Safety Precautions
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 Part list .............................................................................................2-2
2-3. Disassembly ...............................................................................................................2-4
2-4. Assembly ....................................................................................................................2-6
2-5. LCD KIT .....................................................................................................................2-8
3. Flow Chart of Troubleshooting
3-1. Baseband
3-1-1. Power ON .............................................................................................................9-1
3-1-2. Initial ......................................................................................................................9-4
3-1-3. Sim Part ................................................................................................................9-6
3-1-4. Charging Part ........................................................................................................9-8
3-1-5. Microphone Part ....................................................................................................9-9
3-1-6. Speaker Part .......................................................................................................9-11
3-1-7. LCD ......................................................................................................................9-13
3-1-8. Camera ................................................................................................................9-16
3-2. RF
3-2-1. GSM Receiver.......................................................................................................3-18
3-2-2. DCS Receiver.......................................................................................................3-19
3-2-3. PCS Receiver.......................................................................................................3-20
3-2-4. GSM Transmitter...................................................................................................3-23
3-2-5. DCS Transmitter...................................................................................................3-24
3-2-6. PCS Transmitter...................................................................................................3-25
3-2-7. Bluetooth Part .....................................................................................................3-27
4. Array course control
Software Downloading
4-1. Downloading Binary Files ..........................................................................................4-2
4-2. Pre-requsite for Downloading ....................................................................................4-2
4-3. S/W Downloader Program .........................................................................................4-3
Contents
5. MAIN Electrical Parts List
6. Block Diagrams
7. PCB Diagrams
8. Reference data
9. Safety Precautions
9-1. Repair Precaution ......................................................................................................9-1
9-2. ESD(Electrostatically Sensitive Devices) Precaution ...............................................9-2
10. Product Function
10-1. Main Function .........................................................................................................10-1
1. Specification
1-1. GSM General Specification
EG SM 9 00
Ph ase 2
F req. Ban d[MHz]
Uplin k/Down link
ARF CN ra nge
T x/Rx spacing
Mo d. Bit r ate/
Bit Period
Ti me Slo t Pe rio d/Fr am e
Per iod
Modula tion
M S Power
Powe r Class
Se nsitivity
TDM A M ux
Cell Radiu s
8 80~915
9 25~960
0~1 24 & 9 75~102 3
45 M Hz
270 .833 kb ps
3 . 692 u s
5 76.9 u s
4. 615 ms
0 .3 G M SK
33 d Bm ~5 dBm
5 pcl ~ 19 pcl
-10 2 dBm
8
35 Km
DCS1 800
Phase 1
1710~1 785
1805~1 880
512~8 85
95 MHz
2 70.83 3 kbps
3.69 2 us
576. 9 us
4 .615 ms
0.3 G MSK
3 0 dBm ~0 dBm
0 pcl ~ 15 pcl
- 100 dBm
8
2 Km
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±3 dBm
7±3 dBm
5±3 dBm
12
13
14
15
6±4 dBm
4±4 dBm
2±5 dBm
0±5 dBm
8±4 dBm
10±4 dBm
GSM900
DCS1800
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
1-2

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