Samsung SGH-X400 service manual(1), Samsung
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GSM TELEPHONE
SGH-X400
SERVICE
Manual
GSM TELEPHONE
CONTENTS
1. Specification
2. Exploded Views and Parts List
3. Electrical Parts List
4. Flow Chart of Troubleshooting
5. Block Diagrams
6. PCB Diagrams
1. SGH-X400 Specification
1. GSM General Specification
GSM900
Phase 1
EGSM 900
Phase 2
DCS1800
Phase 1
PCS1900
Freq. Band[MHz]
Uplink/Downlink
890~915
935~960
880~915
925~960
1710~1785
1805~1880
1850~1910
1930~1990
ARFCN range
1~124
0~124 &
975~1023
512~885
512~810
Tx/Rx spacing
45MHz
45MHz
95MHz
80MHz
Mod. Bit rate/
Bit Period
270.833kbps
3.692us
270.833kbps
3.692us
270.833kbps
3.692us
270.833kbps
3.692us
Time Slot
Period/Frame Period
576.9us
4.615ms
576.9us
4.615ms
576.9us
4.615ms
576.9us
4.615ms
Modulation
0.3GMSK
0.3GMSK
0.3GMSK
0.3GMSK
MS Power
33dBm~13dBm 33dBm~5dBm 30dBm~0dBm 30dBm~0dBm
Power Class
5pcl ~ 19pcl
5pcl ~ 19pcl
0pcl ~ 15pcl
0pcl ~ 15pcl
Sensitivity
-102dBm
-102dBm
-100dBm
-100dBm
TDMA Mux
8
8
8
8
Cell Radius
35Km
35Km
2Km
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1-
1
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SGH-X400 Specification
2. GSM TX power class
TX Power
control level
GSM900
TX Power
control level
DCS1800
TX Power
control level
PCS1900
5
33
±
2dBm
0
30
±
2dBm
0
30
±
2dBm
6
31
±
3dBm
1
28
±
3dBm
1
28
±
3dBm
7
29
±
3dBm
2
26
±
3dBm
2
26
±
3dBm
8
27
±
3dBm
3
24
±
3dBm
3
24
±
3dBm
9
25
±
3dBm
4
22
±
3dBm
4
22
±
3dBm
10
23
±
3dBm
5
20
±
3dBm
5
20
±
3dBm
11
21
±
3dBm
6
18
±
3dBm
6
18
±
3dBm
12
19
±
3dBm
7
16
±
3dBm
7
16
±
3dBm
13
17
±
3dBm
8
14
±
3dBm
8
14
±
3dBm
14
15
±
3dBm
9
12
±
4dBm
9
12
±
4dBm
15
13
±
3dBm
10
10
±
4dBm
10
10
±
4dBm
16
11
±
5dBm
11
8
±
4dBm
11
8
±
4dBm
17
9
±
5dBm
12
6
±
4dBm
12
6
±
4dBm
18
7
±
5dBm
13
4
±
4dBm
13
4
±
4dBm
19
5
±
5dBm
14
2
±
5dBm
14
2
±
5dBm
15
0
±
5dBm
15
0
±
5dBm
1-
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1
2
11
12
3
6
4
13
5
14
15
18
7
17
16
9
10
19
8
20
21
22
23
SAMSUNG Proprietary-Contents may change without notice
SGH-X400 Exploded view and its Part list
2. Cellular phone Parts list
NO
Description
SEC.CODE REMARK
1 DUAL WINDOW LCD
GH75-03088A
2 FOLDER UPPER
GH75-02636B
3 DUAL LCD
GH07-00319A
4 SPEAKER
3001-001393
5 MOTOR
3101-001351
6 MAIN LCD
GH07-00247A
7 FOLDER LOWER
GH75-02635B
8 MAIN WINDOW LCD
GH72-07620A
9 SCREW
6001-001155
10 HOLE SHEET(A)
GH74-04896B
HOLE SHEET(B)
GH74-04897B
11 FRONT COVER
GH75-02633B
12 SIDE KEY
GH75-02632A
13 KEYPAD
GH75-03162A
14 MAIN PBA
GH92-01422A
15 DOME SHEET
GH59-00745A
16 IF COVER
GH73-01688B
17 MIC
GH30-00015A
18 ANTENNA
GH42-00285A
19 REAR COVER
GH75-02634B
20 SCREW
6001-001478
21 SCREW CAP
GH73-01692B
22 RF COVER
GH73-01743B
23 BATTERY
GH43-00830B
900MAH
GH43-00853B
620MAH
2-
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This Document can not be used without Samsung's authorization
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