LG LG-E400 - Page 89

4. TROUBLE SHOOTING
- 89 -
Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
TP901TP900
C904
22p
C926
u1
C923
n01
C922
u7.4
C921
u7.4
C918
n01
VREG_MSME_1.8V
R900
M
1
L904
82n
C910
47p
C917
n01
L901
68n
C924
n01
C919
n01
+3V_WLAN_WCN
C920
p01
R904
1M
VREG_MSME_1.8V
C925
0.1u
DNI
R903
L902
82n
R901
2.2K
R902
2.2K
TP902 TP903TP904 TP905
U900
WCN2243
EAN61966101
3
43
53
03 71
0
2
25 62
7
2
52
54
5
15
12
13
19
32
21
55
50
37
54
10
4
14
24
31
57
40
47
36
53
42
58
51
56
46
49
43
29
28
33
6
1 11 7 2 81 9
8 2
2
61 4
4
9
3
83
84
32 14
2DNG
3DNG
1MF_DNGA 2MF_DNGA
3MF_DNGA 4MF_
D
NG
A
4DNG
M
F
_
D
NG
A
1TB_DNGA
2TB_DNGA
3TB_DNGA
4TB_DNGA 5TB_DNGA 6
T
B
_
D
NG
A
7TB_DNGA
GND1
SYS_RST_N
I2C_SDA
I2C_SCL
FM_HRX_IN
FM_PRXTX_IO
FM_I2S_SD
FM_I2S_WS
FM_I2S_SCK
BT_PCM_IN
BT_PCM_CLK
SLEEP_CLK
BT_UART_RXD
BT_UART_TXD
BT_UART_CTS
BT_UART_RTS
VDD_IO
VDD_XO_BIAS
VREG_DIG
VREG_ANA
VDD_LDO_IN
VDD_FM_1P3_1
VDD_FM_1P3_2
VDD_FM_1P3_3
VDD_FM_1P3_4
VDD_DIG_1P3
VDD_FM_DAC
VDD_BT_PA
VDD_BT_1P3_1
VDD_BT_1P3_2
VDD_BT_1P3_3
VDD_BT_1P3_4
TNI_SDR_MF
KLC_SY
S
L_OL_MF R
_
OL
_
MF
TUO_MCP_TB CNYS_MCP_TB
QE
R
_
K
L
C
_T
B
EVITCA_TB SUTATS_TB MRIFNOC_XT
OIFR_TB
C927
p01
SLEEP_CLK
L
_MF
R
_
M
F
BT_PCM_CLK
BT_PCM_CLK
CN
Y
S_
M
C
P
_TB
BT_PCM_SYNC
BT_UART_CTS
BT_UART_RTS
FM_ANT
BT_PCM_OUT
BT_PCM_OUT
NI_MCP_TB
BT_PCM_IN
BT_RST_N
BT_UART_RX
BT_UART_TX
NCW_KLC_MF_TB
NCW_QER_KLC_MF_TB
I2C_COMMON_SDA_WCN
I2C_COMMON_SCL_WCN
TNI_SDR_MF
TCQ_FR_TB
EVITCA_NALW Y
TI
R
OI
R
P
_TB
EVITCA_TB
73nip ot esolc 45nip ot esolc 5nip ot esolc 31nip o
t
e
s
olc
BT/FM Module : WCN2243
C937 1n
K
0
1
509R
C932
470p
U901
EAN62416201
WCN1314-0-87WLNSP-TR-0D
63
33
53
56
45
71
84
75
82
28
13
16
6
15
14
23
11
21
12
17
22
87
80
41
29
20
39
19
26
25
9
27
18
SLEEP_CLK
GND_D1
DNC1
GND_D2
GND_D3
WLAN_RST_N
WLAN_ACTIVE
BT_PRIORITY
BT_ACTIVE
TCXO_IN
RF_RX
PDET_IN
PA_EN
WLAN_CLK_REQ
TR_SW_EN_0
TR_SW_EN_1
TR_SW_EN_2
SDIO_CMD
SDIO_CLK
SDIO_DATA3
SDIO_DATA2
SDIO_DATA1
SDIO_DATA0
DNC2
PLL_EXT_LPF
GND_A
RF_TX_DA
RF_TX_PA
GND_A1
GND_A2
GND_A3
GND_A4
REXT
SLEEP_CLK
WLAN_CLK
WLAN_CMD
WLAN_SDIO[3]
WLAN_SDIO[2]
WLAN_SDIO[1]
WLAN_SDIO[0]
WLAN_RST_N
WLAN_CLK_REQ_WCN
WLAN_CLK_WCN
WLAN_RF_TX
WLAN_RF_RX
WLAN_PWR_DET_IN
WLAN_SW_[2]
WLAN_SW_[1]
WLAN_SW_[0]
WLAN_ACTIVE
BT_PRIORITY
BT_ACTIVE
Wi-Fi : WCN1314