![background image](http://html.mh-extra.com/html/samsung/sgh-e720/sgh-e720_service-manual_1190615007.webp)
SAMSUNG Proprietary-Contents may change without notice
SGH-E720 Flow Chart of Troubleshooting
2-
4
This Document can not be used without Samsung's authorization
V
C
C
B
V
C
C
D
_
1
_
5
C
4
2
1
C
42
6
T
H
1
0
1
V
C
C
D
E
A
R
_
C
H
E
C
K
R
S
T
P
C
S
_
R
X
_E
N
AUXOUTN
RTXIN
S
E
R
D
A
T
F
L
A
S
H
_
R
E
S
E
T
V
C
C
A
C
4
1
8
C
4
0
3
C
4
0
2
V
C
C
D
_
1
_
8
V
B
A
T
R
41
3
C
4
0
9
C428
V
C
C
D
R
4
0
7
Z
D
40
5
M
4
0
0
NEG
POS
V
R
F
V
B
A
T
C
4
0
8
VSS3 R2
P6
VSS4
VXVCM
R13
XOENAQ
D1
C
4
0
5
V
C
C
A
V
C
C
B
V
R
F
C
4
5
8
D
S
P
_
D
B
(0
:1
5
)
D
S
P
_
A
B
(0
:8
)
S
IM
_
R
S
T
B
P
_
V
F
S
IM
_
C
L
K
MICOUTP
MICOUTN
MICINP
MICINN
D
S
P
_
D
B
(0
)
K
E
Y
_
B
L
2
K
E
Y
_
B
L
1
D
S
P
_
IO
IN
T
R
Q
DSP_INT
D
S
P
_
D
B
(9
)
D
S
P
_
D
B
(8
)
D
S
P
_
D
B
(7
)
D
S
P
_
D
B
(6
)
D
S
P
_
D
B
(5
)
D
S
P
_
D
B
(4
)
D
S
P
_
D
B
(3
)
D
S
P
_
D
B
(2
)
D
S
P
_
D
B
(1
5
)
D
S
P
_
D
B
(1
4
)
D
S
P
_
D
B
(1
3)
D
S
P
_
D
B
(1
2
)
D
S
P
_
D
B
(1
1
)
D
S
P
_
D
B
(1
0
)
D
S
P
_
D
B
(1
)
C
4
0
0
R
41
2
C
4
1
7
V
R
T
C
C
4
1
9
V
C
C
B
C
4
1
4
V
C
C
D
_
1
_
8
R
41
4
PSW1_BUF
C
4
0
1
C
4
1
6
C
4
0
4
V
B
A
T
U
P
_
C
S
AUXOUTP
AUXINP
AUXINN
AOUTBP
AOUTBN
AOUTAP
AOUTAN
AFC
D
S
P
_
A
B
(8
)
D
S
P
_
A
B
(7
)
D
S
P
_
A
B
(6
)
D
S
P
_
A
B
(5
)
D
S
P
_
A
B
(4
)
D
S
P
_
A
B
(3
)
D
S
P
_
A
B
(2
)
D
S
P
_
A
B
(1
)
D
S
P
_
A
B
(0
)
B
1
2
V
L
D
O
_5
B
1
0
V
L
D
O
_
6
A
1
4
V
L
D
O
_
7
C
1
2
V
R
E
F
A
1
0
VREGN
R14
VREGP
M13
V
R
T
C
H
1
1
V
S
IM
K
1
2
VSS1 G5
VSS2 K4
V
E
X
T
E
1
4
V
IB
_
D
R
V
F
1
5
L9
VIB_RNG_EN
V
L
4
S
_
A
A
1
2
V
L
4
S
_
B
B
1
1
V
L
5
S
_
A
D
1
0
C
9
V
L
5
S
_
B
V
L
D
O
_1
G
1
1
V
L
D
O
_
2
J
1
2
V
L
D
O
_
3
A
1
3
V
L
D
O
_
4
VDD2 M3
VDD3 N6
C
1
1
V
D
D
3
4
VDD5 C10
VDD67 B13
VDDB A6
VDDD N11
VDDV L11
VDD_IO1 N5
VDD_IO2 J4
VDD_OCTL C4
K
1
4
S
IM
_
IO
J
1
1
S
IM
_
R
S
T
K
1
1
TXP
E7
U
P
_
C
L
K
N
9
U
P
_
IO
P
1
0
U
P
_
R
S
T
R
1
0
V
A
C
C
F
1
4
V
B
A
T
E
1
3
VDD1 J3
V
D
D
1
2
J
1
3
D6
RXTXIP
D7
RXTXQN
C6
RXTXQP
C7
S
C
L
K
_
P
S
C
L
8
M
7
S
D
I_
P
S
C
S
D
O
_
P
S
C
N
7
S
E
R
C
K
C
2
C
1
S
E
R
D
A
B
1
S
E
R
L
E
1
S
E
R
L
E
2
A
2
S
IM
_
C
L
K
PWR_SW1N
C15
PWR_SW2
C14
RAREF1
B6
RAREF2
B5
R
3
R
E
S
E
T
N
_
C
S
P
RESET_O
K9
R
IN
G
_
D
R
V
F
1
3
R
T
C
_A
L
M
N
H
1
0
RTC_CLK
N4
R
W
N
L
2
RXTXIN
P5
O
C
T
L
0
E
6
C
5
O
C
T
L
1
O
C
T
L
2
F
5
E
5
O
C
T
L
3
O
C
T
L
4
A
4
G
6
O
C
T
L
5
O
C
T
L
6
B
3
A
3
O
C
T
L
7
PSW1_BUF
L7
PWR_KEEP
M9
I|O
L
E
D
1
_
D
R
V
G
1
3
L
E
D
2
_
D
R
V
G
1
2
MC
R6
MICINN
M14
MICINP
N14
MICOUTN
P15
MICOUTP
N15
MODE
N10
1
NC5
NC6 2
NC7
GNDS6 G8
GNDS7 G9
GNDS8 G10
GNDS9 H6
GNDV P13
GND_HCUR F11
GND_OCTL B4
GND_PSC1 B15
GND_PSC2 K15
INTRQ
L10
L
3
GNDS11 H8
H9
GNDS12
GNDS13 J7
GNDS14 J8
GNDS15 J9
GNDS16 J10
GNDS17 K10
GNDS2 F8
GNDS3 F9
GNDS4 F10
GNDS5 G7
H
5
D
B
6
G
3
D
B
7
G
4
D
B
8
F
4
D
B
9
F
1
DINTR
P3
GNDB F6
M10
GNDD
GNDQ E8
GNDS1 F7
GNDS10 H7
K
2
D
B
1
D
B
1
0
F
2
D
B
1
1
F
3
D
B
1
2
E
2
D
B
1
3
E
3
D
B
1
4
D
3
D
2
D
B
1
5
D
B
2
K
3
J
5
D
B
3
D
B
4
J
6
D
B
5
D13
C
H
_
B
D
R
V
E
1
1
C
H
_
IS
E
N
F
1
2
C
H
_
R
E
S
D
1
4
E
9
C
R
E
F
K
8
C
S
N
_
P
S
C
DAICK
R4
DAIDI
L6
DAIDO
M6
DAIRN
P4
D
B
0
K
1
E
1
0
A
D
C
_
A
U
X
2
D
1
5
AFC
D9
AOUTAN
N12
AOUTAP
P11
AOUTBN
P12
AOUTBP
R12
AUXINN
L14
AUXINP
M15
AUXOUTN
L13
AUXOUTP
K13
AUX_ADC3
U
4
0
1
A
B
0
K
6
P
1
A
B
1
A
B
2
L
5
N
1
A
B
3
A
B
4
N
2
M
2
A
B
5
A
B
6
M
1
K
7
A
B
7
A
B
8
K
5
A
D
C
_
A
U
X
1
C
45
6
C
4
0
7
R
4
0
5
5
5
6
6
7
G
G
8
9
G
G
1
0
C
N
4
0
1
1
1
2
2
3
3
4
4
C
4
0
6
R
4
0
6
C
4
2
0
C
4
2
7
C
4
1
5
C
45
7
S
IM
C
L
K
VAPC
S
IM
_
R
S
T
S
IM
_
IO
S
IM
_
C
L
K
S
E
R
L
E
S
E
R
C
L
K
U
P
_
S
D
O
U
P
_
S
D
I
U
P
_
S
C
L
K
RTXQP
RTXQN
RTXIP
D
S
P
_
R
W
N
CLK32K
R
T
C
A
L
A
R
M
JIG_ON
PWR_ON
P
W
R
_
K
E
E
P
P
A
C
_
E
N
R
F
_
E
N
T
X
_
B
A
N
D
_
S
E
L
V
S
IM
S
IM
_
IO
XOENAQ
V
S
IM
D
C
S
_
T
X
_
E
N
G
S
M
_
T
X
_
E
N
V
IB
_
E
N
M
O
T
S
IM
R
S
T
S
IM
D
A
T
A