4. TROUBLE SHOOTING
- 161 -
Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4.21.3 Checking VDDIO, REG_PU, VDD_EE
Settings NFC mode on and check the supplying voltage 1.8V of VDDIO (Pin13), REG_PU (Pin25), VDD_EE (Pin32)
47pC9015
C9017
33p
33p
C9020
L9002 330n
330nL9003
C9014 47p
MCE62492901
ANT9004
FEED
ANTENNA
C9039
330n
ANT9003
MCE62492901
FEED
ANTENNA
330n
C9029
R9003
0
0
R9004
DNI
R9014
DNI
C9036
U9003
1
3 6
8
9
5
2
4
7
NC2
IO0
SWIO
CLK
NC3
VPS
RSTNC1
GND
C9037 DNI
1uC9031
10nC9034
1nC9035
R9001 4.7K
4.7KR9002
10u
C9038
U9002
31
18
8
7
10
11
29
28
19
20
33
34
3
4
12
14
16
17
15
22
25
26
13
1
2
5
6
9
21
23
24
27
30
32
35
GND
VDD_EE
VDD_ANT
VDDA_CAP
VDDC_CAP
VDD_VCO
VDD_XTAL
VDD_EEPROM_IN
VDD_ADC
VDDSWP_OUT1
VDDSWP_OUT0
VDDSWP_IN
VDDIO
VBAT
REG_PU
LPO
SPI_INT
UART_RXD
UART_CTS_N
UART_RTS_N
UART_TXD
SWPIO_1
SWPIO_0
SCL
SDA
XTAL_XOP
XTAL_XON
TX2
TX1
CLK_REQ
HOST_WAKE
NFC_WAKE
TM2
NC1
NC2
1ZCB26000AB0M
26MHz
X9001
21
34
C9027 4.7u
C9030 4.7u
180p
C9016
C9033
4.7u
180p
C9019
TP9002
VREG_S4_1P8
VREG_S4_1P8
R9007
0
NFC_VPWR
100n
C9026
TP9003
C9028
100n
0R9009
R9008 0
R9006 0
+3V0_USIM_NFC
4.7KR9010
C9022
12p
C9023 12p
VREG_MODEM_L6_2P85
+VPWR
TP9004
NFC_VPWR
VA9002
VA9001
TP9006
TP9005
DNI
R9012
1nC9032
I2C_COMMON_SCL
I2C_COMMON_SDA
NFC_WAKE_BCM
CLK_REQ_BCM
NFC_SWP
NFC_IRQ
NFC_VEN
VDD_EE
VDD_EE
Rev.E Rev.E
Rev.E
Rev.E
Rev.D
Rev.D
Current handling 250mA minimum
DCR = 1 ohm or less
L9002/L9003
A suggested part is the Coilcraft 0603HL-331XJRC
Keep away from noise trace
Rev.B
will add an EXTERNAL EEPROM for eSE
1.8V
1.8V
To Next Page
Loading...
