Samsung SGH-E770 service manual.pdf

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GSM TELEPHONE
SGH-E770
GSM TELEPHONE
1.
2.
3.
4.
5.
6.
CONTENTS
Specification
Flow Chart of Troubleshooting
Exploded View and Parts List
MAIN Electrical Parts List
PCB Diagrams
Block Diagrams
1. SGH-E770 Specification
1-1. GSM General Specification
GSM 900
F r e q . Ba n d [ M Hz ]
Uplink/ Downlink
AR FC N range
T x /Rx s pacing
G P RS
EDGE
DCS1800
1710~1785
1805~1880
512~885
95M Hz
270.833Kbp s
3.692us
812.5Kbp s
3.692us
576.9us
4.615ms
0.3GM S K
8P SK
30dBm~0dBm
26~0dBm
0pcl~15pcl
2~15(class E2)
-100dBm
8
2Km
PCS1900
1850~1910
1930~1990
512~810
80M Hz
270.833Kbp s
3.692us
812.5Kbp s
3.692us
576.9us
4.615ms
0.3G MS K
8P SK
30dBm~0dBm
26~0dBm
0pcl~15pcl
2~15(class E2)
-102dBm
8
2Km
88 0~9 15
92 5~9 60
0~12 4
& 9 75 ~10 23
45M Hz
270.833Kbp s
3.692us
812.5Kbp s
3.692us
576.9us
4.615ms
0.3GM S K
8P SK
33dBm~5dBm
27~5dBm
5pcl~19pcl
8~ 19(clas s E 2)
-102dBm
8
35Km
M od . Bit
rate/
Bit P eriod
T i m e Slo t
Period/Frame Per iod
G P RS
Modu lation
ED G E
G P RS
M S P o w er
ED G E
G P RS
EDGE
P o wer
Leve l
Sens itivity
T DM A Mu x
Cell R adius
1-1
SGH-E770 Specification
1-2. GMSK TX power Level
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
12
13
14
15
TX Power
control
level
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
GSM900
33±2dBm
31±3dBm
29±3dBm
27±3dBm
25±3dBm
23±3dBm
21±3dBm
19±3dBm
17±3dBm
15±3dBm
13±3dBm
11±5dBm
9±5dBm
7±5dBm
5±5dBm
DCS1800
30±2dBm
28±3dBm
26±3dBm
24±3dBm
22±3dBm
20±3dBm
18±3dBm
16±3dBm
14±3dBm
12±4dBm
10±4dBm
8±4dBm
6±4dBm
4±4dBm
2±5dBm
0±5dBm
PCS1900
30±2dBm
28±3dBm
26±3dBm
24±3dBm
22±3dBm
20±3dBm
18±3dBm
16±3dBm
14±3dBm
12±4dBm
10±4dBm
8±4dBm
6±4dBm
4±4dBm
2±5dBm
0±5dBm
1-2
SGH-E770 Specification
1-3. EDGE TX Power Level
TX Power
control
level
8
9
10
11
12
13
14
15
16
17
18
19
TX Power
control
level
2
3
4
5
6
7
8
9
10
11
12
13
14
15
TX Power
control
level
2
3
4
5
6
7
8
9
10
11
12
13
14
15
GSM850
27±3dBm
25±3dBm
23±3dBm
21±3dBm
19±3dBm
17±3dBm
15±3dBm
13±3dBm
11±5dBm
9±5dBm
7±5dBm
5±5dBm
DCS1800
26±3dBm
24±3dBm
22±3dBm
20±3dBm
18±3dBm
16±3dBm
14±3dBm
12±4dBm
10±4dBm
8±4dBm
6±4dBm
4±4dBm
2±5dBm
0±5dBm
PCS1900
26±3dBm
24±3dBm
22±3dBm
20±3dBm
18±3dBm
16±3dBm
14±3dBm
12±4dBm
10±4dBm
8±4dBm
6±4dBm
4±4dBm
2±5dBm
0±5dBm
1-3
2. SGH-E770 Flow Chart of Troubleshooting
2-1.Baseband
2-1-1. Power ON
'Power ON' Does not work
Check the current consumption
Current consumption
≥
100mA ?
YES
Check the V bat. voltage
NO
Down load again
Voltage
≥
3.3V ?
YES
Check the pins of UCP301
NO
Charge the Battery
C311
≥
1.8V ?
YES
C314 and C315 = 2.8V?
YES
NO
NO
Check UCP301 and C311
C316=1.5V?
YES
NO
Check UCP301 and C316
Check the clock signal
at pin #3 of TCX101
Freq.=13MHz,Vrms
≥
300mV
YES
NO
Check the clock generation
circuit (TCX101, U104 pin#4)
Check the Initial operation
END
2-1
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