Samsung SGH-E720 service manual, GSM, Service Manual, Samsung, Seria E, Samsung SGH-E720
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GSM TELEPHONE
SGH-E720
GSM 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-E720 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-
1
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SGH-E720 Specification
1-2. GSM TX power class
TX Power
control level
GSM900
TX Power
control level
DCS1800
TX Power
control level
PCS1900
5
33
±
2dBm
0
30
±
3dBm
0
30
±
3dBm
6
31
±
2dBm
1
28
±
3dBm
1
28
±
3dBm
7
29
±
2dBm
2
26
±
3dBm
2
26
±
3dBm
8
27
±
2dBm
3
24
±
3dBm
3
24
±
3dBm
9
25
±
2dBm
4
22
±
3dBm
4
22
±
3dBm
10
23
±
2dBm
5
20
±
3dBm
5
20
±
3dBm
11
21
±
2dBm
6
18
±
3dBm
6
18
±
3dBm
12
19
±
2dBm
7
16
±
3dBm
7
16
±
3dBm
13
17
±
2dBm
8
14
±
3dBm
8
14
±
3dBm
14
15
±
2dBm
9
12
±
4dBm
9
12
±
4dBm
15
13
±
2dBm
10
10
±
4dBm
10
10
±
4dBm
16
11
±
3dBm
11
8
±
4dBm
11
8
±
4dBm
17
9
±
3dBm
12
6
±
4dBm
12
6
±
4dBm
18
7
±
3dBm
13
4
±
4dBm
13
4
±
4dBm
19
5
±
3dBm
14
2
±
5dBm
14
2
±
5dBm
15
0
±
5dBm
15
0
±
5dBm
1-
2
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2. SGH-E720 Flow Chart of Troubleshooting
2-1.Baseband
2-1-1. Power ON
'Power ON' Does not work
Check the current consumption
Current consumption
≥
100mA ?
NO
Down load again
YES
Check the V bat. voltage
Voltage
≥
3.3V ?
NO
Charge the Battery
YES
Check the pins of U401
C415
≥
1.8V ?
NO
Check U401 and C415
YES
C418 and C419 = 2.8V?
NO
YES
NO
C420=1.5V?
Check U401 and C420
YES
Checktheclocksignal
at pin #3 of OSC101
Freq.=13MHz,Vrms
≥
300mV
NO
Checktheclockgeneration
circuit (OSC101, F100 pin#4)
YES
Check the Initial operation
END
2-
1
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SGH-E720 Flow Chart of Troubleshooting
P4
SIMCLK
NC2
2
T2 SIMIO
NC1
1
P5 PIO14_SIMRST
B19
PIO07_USB_SUSP
C19
PIO09_USB_VPI
VSSA_U
F18
C18
D17 PIO12_USB_VPO
E16 PIO13_USB_VMO
PIO11_USB_VMI
VDDA_U
F17
VSSA_D
R11
VDDA_D
T11
F16 PIO36_USB_OEN
E17
PIO37_USB_DATA
VSS18
M12
VSS17
M11
R3
VSS16
M10
SPCLK0
R4
SPRXD0
VSS15
M9
U2 SPTXD0_I2SD
VSS14
M8
T3 SPFS0
VSS13 L8
P3
RIO_PIO01
VSS12
L7
P2 DSR0_PIO02
DTR0_PIO03
VSS11 K8
N4
VSS10
J12
N2
RTS0_PIO04
H12
VSS9
M3
H11
TX0
VSS8
M1
RX0_IRQ28
VSS7
H10
M6 CTS0_PIO29
N5 DCD0_PIO44
VSS6
H9
VSS5 H8
R16 PIO41_IRDATX
PIO42_IRDARX
VSS4 G9
R17
VSS3 G8
K7
TX1
VSS2
A18
L6
RX1_IRQ28
A2
VSS1
J7
KEYBRD0
KEYBRD1
VDD_CORE8 V13
J6
VDD_CORE7 V7
J5
KEYBRD2
VDD_CORE6 N18
J4
J8
KEYBRD4
KEYBRD5
KEYBRD3
VDD_CORE5 M2
H18
VDD_CORE4
H6
H4
KEYBRD6
KEYBRD7
G2
VDD_CORE3
VDD_CORE2
B13
H1
VDD_CORE1
B8
H3
G6
KEYBRD9
KEYBRD8
VDD_IO_1P8_18
W18
VDD_IO_1P8_17
W8
G4
KEYBRD10
VDD_IO_1P8_16
U12
H2
VDD_IO_1P8_15
U5
KEYBRD11_PSW1_BUF
J15
VDD_IO_1P8_14
U1
PIO38_MCI_CLK
J13
T18
PIO08_MCI_CMD
VDD_IO_1P8_13
K13
PIO21_MCI_DAT0
PIO22_MCI_DAT1
P1
VDD_IO_1P8_12
L12
L13
PIO23_MCI_DAT2
L15 PIO24_MCI_DAT3
VDD_IO_1P8_11
L16
VDD_IO_1P8_10
L4
VDD_IO_1P8_9 F1
L14 PIO39_MCI_CMD_EN
PIO40_MCI_DAT_EN
VDD_IO_1P8_8
D18
M14
D9
VDD_IO_1P8_7
N14
C14
PIO43_MCI_DAT0_EN
VDD_IO_1P8_6
H19
C1
X1RTC
VDD_IO_1P8_5
F19
X2RTC
VDD_IO_1P8_4
B16
H17
VDD_IO_1P8_3
B12
RTCALARMN
G16
OSC32OUT
VDD_IO_1P8_2 B6
P15 PIO19_PWRKEEP
PIO20_SYSCLKREQ
VDD_IO_1P8_1 B4
P19
VRTC
G18
G5
W12
PWM1_PIO46
CKI
V17
RESTN
G15
PIO10
V19
PIO25
U16
PIO26
PIO27
TMS
TRSTN R12
W14
U19
W17
R13
PIO28
F200
2-
2
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PIO32
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