4. TROUBLE SHOOTING
- 114 -
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
U501
2
1
L
1
1
B
0
1
E
1
1
C
2
1
C
6
L
2
J
6
H
7
F
2
D
3
E
1
C
1
E
3
G
6
B
1
B
4
C
4
A
3
A
2
1
M
1
1
L
1
1
K
2
1
K
2
1
J
1
1
J
0
1
M
3
D
1
D
9
M
0
1
L
8
K
8
J
8
F
0
1
B
7
B
0
1
A
9
A
7
A
F12
E8
D8
D7
A8
J10
J9
F10
K9
L9
H4
H5
G4
J3
H3
H1
H2
D4
H7
F2
G1
F1
L2
L1
K1
M7
M6
L8
M8
M5
L7
K7
J7
K6
K4
J1
H10
G11
H12
G12
H11
F9
F5
G5
F4
E5
H9
H8
G10
G9
D6
F6
E7
E6
D12
E12
B12
A12
A11
K3
M4
M1
L4
K5
L3
M2
M3
D5
B3
A5
A6
E4
2
A
1
A
1
1
M
0
1
K
2
K
6
J
5
J
4
J
8
G
7
G
6
G
9
E
0
1
D
1
1
E
1
1
D
0
1
C
9
D
9
B
9
C
8
B
8
C
7
C
2
G
3
F
2
E
3
C
6
C
2
B
5
C
5
B
4
B
2
C
5
L
1
1
F
0
M
T
_
T
B
L
E
S
_
G
A
T
J
D
N
G
_
A
_
N
E
G
O
L
_
F
R
W
G
5
_
A
P
D
N
G
_
F
R
W
G
2
_
A
P
D
N
G
_
F
R
W
D
N
G
_
V
R
D
A
P
_
F
R
W
G
5
_
A
N
L
D
N
G
_
F
R
W
G
2
_
A
N
L
D
N
G
_
F
R
W
D
N
G
_
A
N
A
_
F
R
W
D
N
G
_
O
C
V
_
F
R
W
D
N
G
_
E
F
A
_
F
R
W
D
N
G
_
L
A
T
X
_
F
R
W
S
S
V
F
I
_
T
B
S
S
V
_
T
B
S
S
V
E
F
_
T
B
S
S
V
O
C
V
_
T
B
S
S
V
F
R
_
T
B
S
S
V
L
L
P
_
T
B
O
I
D
U
A
S
S
V
_
M
F
S
S
V
X
R
_
M
F
O
C
V
S
S
V
_
M
F
S
S
V
L
L
P
_
M
F
S
S
V
_
M
F
1
C
S
S
V
2
C
S
S
V
3
C
S
S
V
4
C
S
S
V
5
C
S
S
V
6
C
S
S
V
S
S
V
A
_
C
I
S
H
S
S
V
A
_
U
M
P
S
S
V
P
_
R
S
1
C
N
2
C
N
WRF_RES_EXT
WRF_RFIN_2G
WRF_RFOUT_2G
WRF_A_TSSI_IN
WRF_G_TSSI_IN
RF_SW_CTRL_0
RF_SW_CTRL_1
RF_SW_CTRL_2
RF_SW_CTRL_3
RF_SW_CTRL_4
RF_SW_CTRL_5
RF_SW_CTRL_6
RF_SW_CTRL_7
FM_AOUT1
FM_AOUT2
FM_TX
FM_RXP
FM_RXN
BT_UART_RXD
BT_UART_TXD
BT_UART_RTS_N
BT_UART_CTS_N
BT_I2S_CLK
BT_I2S_DI
BT_I2S_WS
BT_I2S_DO
BT_PCM_CLK
BT_PCM_IN
BT_PCM_OUT
BT_PCM_SYNC
BT_GPIO_0
BT_GPIO_1
BT_GPIO_2
BT_GPIO_3
BT_GPIO_4
BT_GPIO_5
HSIC_AVDD12
VDDIO_RF
WL_VDDIO
BT_VDDIO
VDD_ISLAND
SDIO_DATA_0
SDIO_DATA_1
SDIO_DATA_2
SDIO_DATA_3
SDIO_CLK
SDIO_CMD
HSIC_STROBE
HSIC_DATA
HSIC_RREF
WRF_XTAL_OP
WRF_XTAL_ON
WRF_TCXO_IN
LPO
WRF_GPIO_OUT
WL_GPIO_0
WL_GPIO_1
WL_GPIO_2
WL_GPIO_3
WL_GPIO_4
WL_GPIO_5
WL_GPIO_6
WL_REG_ON
BT_REG_ON
BT_RST_N
EXT_SMPS_REQ
EXT_PWM_REQ
BT_RF
BT_CLK_REQ_IN
BT_CLK_REQ_POL
BT_CLK_REQ_MODE
BT_CLK_REQ_OUT
3
P
3
D
D
V
A
P
_
T
B
2
P
1
D
D
V
A
N
L
_
T
B
2
P
1
D
D
V
O
C
V
_
T
B
2
P
1
D
D
V
F
I
_
T
B
2
P
1
D
D
V
L
L
P
_
T
B
1
C
D
D
V
_
T
B
2
C
D
D
V
_
T
B
3
C
D
D
V
_
T
B
1
O
D
L
N
L
_
T
U
O
V
O
D
L
C
_
T
U
O
V
8
P
1
_
N
I
_
O
D
L
O
C
V
_
D
D
V
_
F
R
W
2
P
1
_
T
U
O
_
O
D
L
O
C
V
_
F
R
W
O
D
L
_
N
I
V
1
P
3
_
T
U
O
V
3
P
3
_
T
U
O
V
2
_
1
T
A
B
D
D
V
_
R
S
2
T
A
B
D
D
V
_
R
S
1
X
L
V
_
R
S
2
X
L
V
_
R
S
G
5
_
A
P
D
D
V
_
F
R
W
G
2
_
A
P
D
D
V
_
F
R
W
D
D
V
_
V
R
D
A
P
_
F
R
W
G
5
_
2
P
1
_
A
N
L
D
D
V
_
F
R
W
G
2
_
2
P
1
_
A
N
L
D
D
V
_
F
R
W
2
P
1
D
D
V
_
L
A
T
X
_
F
R
W
D
D
V
_
O
X
C
T
_
F
R
W
2
P
1
D
D
V
_
A
_
N
E
G
O
L
_
F
R
W
2
P
1
_
E
F
A
D
D
V
_
F
R
W
2
P
1
_
A
N
A
D
D
V
_
F
R
W
1
C
D
D
V
_
L
W
2
C
D
D
V
_
L
W
3
C
D
D
V
_
L
W
4
C
D
D
V
_
L
W
2
P
1
D
D
V
F
R
_
M
F
2
P
1
D
D
V
F
I
_
M
F
5
P
2
D
D
V
_
M
F
O
I
D
U
A
D
D
V
_
M
F
1
_
1
T
A
B
D
D
V
_
R
S
C510
220p
18p
C536
X500
1ZZCAB37400AA0A
37.4MHz
4
2
3
1
IN1
IN2
GND1
GND2
C531
1.5p
1
0
5
R
0
C535
18p
C511
10u
L505
3.3n
C515
2.2u
C530
10p
TP511
FB502
120
3
0
5
B
F
C532
1u
TP515
TP508
TP507
TP506
TP505
3
V
3
_
D
D
V
u
7.
4
7
1
5
C
10p
C537
4
0
5
B
F
u
1
4
2
5
C
N
L
_
D
D
V
5
V
2
_
D
D
V
O
D
L
_
N
I
V
4
0
5
L
u
2.
2
C526
0.1u
C525
0.1u
M
F
_
D
D
V
C516
220n
5
V
2
_
D
D
V
T
B
_
D
D
V
0.1u
C518
F
R
W
_
D
D
V
N
L
_
D
D
V
O
D
L
_
N
I
V
C509
0.1u
2
2
5
C
p
0
1
C528
0.1u
VREG_MSME_1.8V
R
W
P
V
+
F
R
W
_
D
D
V
3
V
3
_
D
D
V
E
R
O
C
_
D
D
V
TP509
R506
0
TP504
TP501
TP502
TP503
TP500
TP517
0
2
5
C
u
7.
4
R503 15K
1
2
5
C
u
7.
4
N
L
_
D
D
V
VDD_BT
VDD_FM
VDD_WRF
FB500
120
120
FB501
u
7.
4
3
2
5
C
VDD_3V3
TP518
TP516
E
R
O
C
_
D
D
V
E
R
O
C
_
D
D
V
75
FB505
C527
4.7u
1
1
5
R
0
2
2
2
0
5
R
I
N
D
9
1
5
C
p
0
1
C533
1u
0.1u
C529
TP514
TP513
TP512
BT_UART_RTS
BT_UART_CTS
BT_RESET_N
BT_UART_RXD
BT_PCM_SYNC
BT_PCM_CLK
WLAN_SDIO[3]
WLAN_SDIO[1]
WLAN_SDIO[2]
WLAN_SDIO[0]
WLAN_CMD
WLAN_CLK
BT_HOST_WAKEUP
BT_WAKEUP
BT_UART_TXD
SLEEP_CLK
WLAN_RESET_N
FM_L
FM_R
WLAN_HOST_WAKEUP
BT_PCM_OUT
BT_PCM_IN
FM_ANT
TX_WLBG
EXT_LNA_GAIN
SW_BT_TX
SW_WL_TX
SW_WL_BT_RX
RX_BG
TX_BT
NC: SDIO, 1: SPI
A1: WRF_RFIN_5G, A2:WRF_RFOUT_5G
To be obsolete
To be obsolete
L503
2.7n
8
0
5
C
p
0
1
C512
0.1u
L506
2.7n
0
0
5
C
p
8
1
C507
10p
L508
8.2n
L507
2.7n
FL500
EAM62250401
LFB212G45CG7D227
3
2
1
IN
D
N
G
OUT
3
V
3
_
D
D
V
C506
10p
C514
0.1u
CN500
1
C505
DNI
U500
7
8
9
0
1
1
1
2
1
2
3
1
1
5
4
6
3
GND2
D
D
V
N
E
_
A
N
L
T
U
O
_
X
R
TX_IN
D
N
G
P
GND1
X
T
_
C
X
R
_
C
T
N
A
C_BT
BT
GND3
9
3
5
C
p
7
2
C503
100p
TX_WLBG
NI
A
G
_
A
N
L
_
T
X
E
SW_BT_TX
X
T
_
L
W
_
W
S
X
R
_
T
B
_
L
W
_
W
S
G
B
_
X
R
TX_BT