Samsung SGH-D730 service manual, samsung service manuals schematy serwisowki
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MITs TELEPHONE
SGH-D730
MITs TELEPHONE
CONTENTS
1. Specification
2. Flow Chart of Troubleshooting
3. Exploded Views and Parts List
4. Electrical Parts List
5. PCB Diagrams
6. Block Diagrams
1. SGH-D730 Specification
1-1. 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 ~ 15pcl 5pcl ~ 19pcl
0pcl ~ 15pcl
0pcl ~ 15pcl
Sensitivity
-102dBm -102dBm -100dBm -100dBm
TDMA Mux
8
8
8
8
Cell Radius
35Km
35Km
2Km
-
1-
2
SGH-D730 Speclflcation
1-2. GSM Tx Power Class
TX Power
control level
GSM900
TX Power
control level
DCS1800
TX Power
control level
PCS1900
5
33±2 dBm
0
30±3 dBm
0
30±3 dBm
6
31±2 dBm
1
28±3 dBm
1
28±3 dBm
7
29±2 dBm
2
26±3 dBm
2
26±3 dBm
8
27±2 dBm
3
24±3 dBm
3
24±3 dBm
9
25±2 dBm
4
22±3 dBm
4
22±3 dBm
10
23±2 dBm
5
20±3 dBm
5
20±3 dBm
11
21±2 dBm
6
18±3 dBm
6
18±3 dBm
12
19±2 dBm
7
16±3 dBm
7
16±3 dBm
13
17±2 dBm
8
14±3 dBm
8
14±3 dBm
14
15±2 dBm
9
12±4 dBm
9
12±4 dBm
15
13±2 dBm
10
10±4 dBm
10
10±4 dBm
16
11±3 dBm
11
8±4dBm
11
8±4dBm
17
9±3dBm
12
6±4 dBm
12
6±4 dBm
18
7±3 dBm
19
5±3 dBm
13
4±4 dBm
13
4±4 dBm
14
2±5 dBm
14
2±5 dBm
15
0±5 dBm
15
0±5 dBm
1-
2
2. SGH-D730 Flow Chart of Troubleshooting and Circuit Diagrams
2-1.Baseband
2-1-1. P
ower ON
'Power On' does not work
Check the current
consumtion more than
100mA
NO
Downloader again
YES
Check the Vbat(batteryO)
Voltagemorethan3.3V
NO
Charge the Battery
YES
①
Check the pin
4 of Q303 is more
than 3.3V
NO
Check
CN304
,
C387
YES
②
Check the pin
1 of Q303 is more
than 3.3V
NO
Check
Q303
,
Q305
and
D302
YES
③
U100 pin A19
=3.0V
NO
Check
U308
,
U100
and
C109
YES
④
U100 pin B14
=1.8V
NO
Check
U308
,
U100
and
C106
YES
⑤
U100 pin A15
=1.6V
NO
Check
U304
,
U100
and
C101
YES
⑥
Check the clock signal
at pin1 of OSC100
Freq=12MHz
NO
Check the clock generation circuit
(
OSC100
)
YES
'Power On' does not work
END
2-
1
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
SGH-D730 Flow Chart of Troubleshooting and Circuit Diagrams
2-
2
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
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