4. TROUBLE SHOOTING
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Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
VBAT
VDD_IO_1V8
90
4
R
K2
8
R426
DNI
CN401
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1u
C406
VAUX_2V85
1u
C416
VAUX_2V85
R412
100ohms
R413
100ohms
R432
100ohms
100ohms
R411
R422
100ohms
R420
100ohms
R434
100ohms
27p
C408
R410
100ohms
100ohms
R419
100ohms
R421
R431
100ohms
100ohms
R429
R427
0
26
4
R
K0
1
R407
120K
C420
27p
C410
27p
27p
C413 C415
27p
27p
C419 C417
27p
27p
C414 C412
27p
27p
C409 C407
27p
27p
C418
LCD_CS_N
MEM_A_[16]
LCD_MAKER_ID
MEM_AD_[15]
MEM_AD_[14]
MEM_AD_[13]
MEM_AD_[12]
MEM_AD_[11]
MEM_AD_[10]
MEM_AD_[09]
MEM_AD_[08]
MEM_WR_N
GND
MLED1
MLED2
NLCD_RESET_1.8
IOVCC
CIRCUIT
0
R219
R220
0
U205
33
82
27
26
13
25
11
01
24
23
13
22
92
21
20
14
12
7
2
9
5
32
19
18
17
8
03
6
16
4
3
15
1
1T
U
O
AUD1
VIN
3T
U
O
AUD2
1
D
N
G
L
C
S
2
D
EL
MIC
CAP
RES
DSS
4T
U
O
3
D
EL
2T
U
O
1
D
EL
DP
U2
UID
D+
A
D
S
D-
\T
NI
VBUS1
VBUS2
4
D
EL
DN
VBAT1
U1
VBAT2
EXPDET
2
D
N
G
D
N
G
P
C259
1u
VAUX_2V85
1u
C218
R223
10K
VBAT
VDD_IO_1V8
C217
DNI
R212
100Kohms
VUSB_CHG_IN
10K
R224
10K
R225
2.2K
R216
R218
0
R221
300Kohms
DSS
VAUX_2V85
3V1_TORCH
VBAT
FB204
0
C214
1u
C208
1u
I2C_SDA
I2C_SCL
UART_TX
UART_RX
1
D
EL
M
EAR_R
EAR_L
2
D
EL
M
ABB_INT_N
MUIC_ACC_ID
D
EL
_
Y
E
K
MUIC_IO_P
MUIC_IO_M
HS_MIC
TP3
TP1
TP2