Samsung SGH-X461 service manual.pdf

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GSM TELEPHONE
SGH-X461
GSM TELEPHONE
1.
2.
3.
4.
5.
6.
7.
CONTENTS
Specification
Flow Chart of Troubleshooting
Exploded View and Parts List
Electrical Parts List
PCB Diagrams
Block Diagrams
Exploded and assembling View
1. SGH-X461 Specification
1-1. GSM General Specification
GSM900
Ph ase 1
Freq. Ban d [M Hz ]
Upl in k/Downl in k
A RF C N ra n g e
Tx/R x sp aci ng
Mod. Bit rat e/
Bit Period
Tim e Sl ot
P eri od /F rame
Peri od
Modu la t ion
MS Power
P ow er Cl a ss
S en si ti vi ty
TDM A Mu x
Cell Ra d iu s
89 0~ 91 5
93 5~ 96 0
1 ~ 1 24
45 MHz
270.833kbp s
3.692us
576.9us
4. 61 5m s
0. 3GM SK
E G S M 9 00
Ph ase 2
88 0~ 91 5
92 5~ 96 0
0 ~ 1 24 &
9 75 ~ 10 23
45 MHz
2 70 . 8 33 k b ps
3.692us
576.9us
4 .6 15 m s
0. 3GM S K
DCS1800
Ph ase 1
1 71 0~ 1 78 5
1 80 5~ 1 88 0
51 2~8 85
95 MHz
270.833kbp s
3.692us
576.9us
4. 61 5ms
0. 3GM SK
3 0d B m ~ 0 d Bm
0pcl ~ 15pcl
-1 00d Bm
8
2 Km
PC S1 90 0
18 50 ~1 91 0
19 30 ~1 99 0
5 12 ~8 10
8 0M Hz
27 0. 83 3kb p s
3. 69 2u s
57 6. 9u s
4. 61 5ms
0 .3 GMS K
30 d Bm ~ 0d B m
0pcl ~ 15pcl
-1 00 dBm
8
-
3 3d B m ~ 13 dB m 3 3d B m ~ 5 d B m
5 p cl ~ 15 p cl
-102d Bm
8
35 Km
5pcl ~ 19pcl
-10 2d Bm
8
35 Km
1-1
SGH-X461 Specification
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
10
11±3 dBm
9±3dBm
7±3 dBm
5±3 dBm
11
12
13
14
15
8±4dBm
6±4 dBm
4±4 dBm
2±5 dBm
0±5 dBm
11
12
13
14
15
8±4dBm
6±4 dBm
4±4 dBm
2±5 dBm
0±5 dBm
TX Power
control level
0
1
2
3
4
5
6
7
8
9
10
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
13±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
10±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
10±4 dBm
1-2
2. SGH-X461
Flow Chart of Troubleshooting
2-
1. Baseband
2-1-1. Power ON
'Power ON' does not work
check the current
consumption
>= 100mA
Yes
No
Download again
Check the Voltage
of the Battery
>= 3.3V
Yes
No
Charge the battery
Check the pin C212,
C213,C214, C215
of U200 is
>=2.8V
Yes
No
Check
"Power On"
key?
Yes
No
check keypad
1
check
U100
and
C100
Check the clock signal at
pin #1 of U802
Freq=26Mhz,
Vrms >=300mV
No
Check the clock generation
circuit U802
2
Yes
Check the Initial Operation
Yes
END
2-1
SGH-X461 Flow Chart of Troubleshooting
2-2

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