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CIRCUIT
1V8_VDD
IO_EXPANDER1
C145
1u
X+
Y+
X-
Y-
LGE Internal Use Only
U103
3
OUT1
1
IN
2
OUT2
4
EN_SET
8
OUT3
7
TP3
OUT4
5
6
GND
OUT5
Touch & Haptic Driver Ckts
VBAT
C322
2.2u
U301
4
VDD
VDDP
SDA
18
XP
SCL
1
YP
SADD
2
XN
LEN
3
YN
INTB
PWM/CLK
HEN
19
PGND
VDP
VDN
GAIN
C321
0.1u
4. TROUBLE SHOOTING
IO_EXPANDER1
TOUCH_EN
LCD_RESET
VIB_EN
C
C
A
FM_LNA_EN
C
A
C
CAM_RESET
H
O
O
K
K
K
B
T
1V8_VDD
1V8_VDD
R314
DNI
C320
2.2u
R313
4.7K
9
7
8
6
17
TP309
5
TP310
10
TP310
16
14
12
R315
13
DNI
C338
10n
TP310
- 76 -
Copyright © 011 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
K16
TRIG_IN
J13
MON1
J12
MON2
C4
MON3
G11
BT_CLK
FSYS1
Main
F11
FSYS2
J11
SPI_CLK
DIGUP_CLK
IC
H11
PCM_CLK
DIGUP1
G10
PCM_SYNC
DIGUP2
(U102)
G
6
A
M
_
P
C
L
K
C
F I
_
P
C
L
K
E
F
7
M
_
H
S
Y
N
C
C
F I
_
H
S
Y
N
C
E
7
M
_
V
S
Y
N
C
C
F I
_
V
S
Y
N
C
F
6
A
M
_
M
C
L
K
C
L
K
O
U
T
2
G
7
F
_
B
O
O
T
C
F I
_
P
D
C
E
6
V
B I
_
P
W
M
C
F I
_
R
E
S
E
T
A
9
_
D
E
T
E
C
T
K
P
_
N I
0
E
A
1
0
S
P
_ I
C
S
K
P
_
N I
1
B
1
0
E
Y
_
C
O
L
2
K
P
_
N I
2
C
1
0
E
Y
_
C
O
L
3
K
P
_
N I
3
D
1
0
_
D
B
B
_
N I
T
K
P
_
N I
4
E
1
0
M
U
C I
_
N I
T
K
P
_
N I
5
D
9
I2C_SDA
I2C_SCL
TOUCH_EN
TOUCH_INT
VIB_PWM
VB301
VIB_EN
+
1
2
-
C337
1u
Only for training and service purposes
Main IC
(U10)
N I
T
6
C
1
C
C
I 3
O
N I
T
0
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