LG GX500 Service Manual page 122

7. CIRCUIT DIAGRAM
12 11
L
MIC BIAS
K
BU18TD2WNVX
4
VIN
3
MIC_BIAS_EN STBY
C317
2.2u
J
MAIN MIC
I
1V8_MIC_BIAS
H
MAIN_MIC_N
C311
47P
MAIN_MIC_P
C316 C307
VA301
47p 47p
G
F
RCV SWITCH
U303 FSA2268TUMX_F113
E
SIM1_RCV_N 10
1B0 1A
SIM2_RCV_N 1
1B1 S1
2
SIM1_RCV_P
2B0 2A
3
SIM2_RCV_P
2B1 S2
4
GND VCC
D
C
HS MIC SWITCH
U305 FSA2268TUMX_F113
10 8
SIM1_HSMIC_N 1B0 1A
B 1 7
SIM2_HSMIC_N 1B1 S1
2 5
SIM1_HSMIC_P 2B0 2A
3 6
SIM2_HSMIC_P 2B1 S2
4 9
GND VCC
A
12 11
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
10 9 8
RPWRON_EN
V_BUS
FB301
U307
1 NLAS4157DFT2G U308
VOUT
2 6
GND USB_SEL S B1
5
VCC GND
C321
2.2U 4
A B0
C310
1u
L303
MIC301
100NH
1
P
2
G1
3
G2
4
O
C318
SPU0410HR5H-PB
2.2u
VA302
MIC SWITCH
2V62_VIO
2V62_VIO
U304 FSA2268TUMX_F113
10 8
SIM1_MIC_N MAIN_MIC_N
8 RCV_N 1B0 1A
1 7
SIM2_MIC_N SIM1_SIM2_SEL
7 SIM1_SIM2_SEL 1B1 S1
2 5
5 SIM1_MIC_P 2B0 2A MAIN_MIC_P
RCV_P
3 6
6 SIM2_MIC_P 2B1 S2
4 9
9 GND VCC
1U
1U
27P 27P
C320
C315
2V62_VIO
SGR STEREO Port is not used
HS_MIC_N
SIM1_SIM2_SEL
HS_MIC_P
1U
C313
10 9 8
7 6 5
SINGLE CHARGING IC
V_BUS
1
SGR_RPWRON_EN
1
2 IN
2
ISET
3
3 VSS1
SG3_RPWRON_EN 4
RPWRON_EN LDO
5
IFULL
C338 C337
1uF 1uF
560 ohm->(910mA) 2K(10%)->91mA
780 ohm->(680mA)
820 ohm->(646mA)
27pF
C327
C305 0.022uF
HS_MIC_N
C326
39pF
C306 0.022uF
HS_MIC_P
C329
27pF
USB SWITCH
VUSB VUSB VBAT
U301 DG2735DN-T1-E3
1 10
V+ NO2 SIM2_USB_DM
SIM2_USB_DP 2 9 USB_DM
NO1 COM2
USB_DP 3 8
COM1 IN2
R301
4 7 SIM1_USB_DM
IN1 NC2
33
R302
SIM1_USB_DP 5 6
NC1 GND
33
C302
1u
UART SWITCH
VBAT
U302 DG2735DN-T1-E3
1 10
V+ NO2
R311
2 9
SIM2_UART_TX NO1 COM2
10
R312
3 8
UART_TX COM1 IN2
10
R308
4 7
UART_SEL IN1 NC2
1K
5 6
SIM1_UART_TX NC1 GND
C314
1u
7 6 5
- 123 -
4 3 2
5PIN uUSB
V_BUS
VBAT 2V62_VIO 2V62_VIO 2V62_VIO
CN301
11 6
PGND
10 8
BAT
U310 9 10
_PG _PPR
BQ25040
8 _EOC 12
CHG
7 14
VSS2
6 _CHG_EN 1
EN_SET
USW_DM 2
USW_DP 3
C336 4
USW_ID
1uF
5
7
C333 9
22pF
11
13
15
L306
100n
1005 coil
MUIC
V_BUS
VBAT
2V62_VIO
C330
0.1uF
C331
0.1u
R319
2.2k
C4 E1
UART_TX UART_TX VBUS
C3 E2
UART_RX UART_RX DM USW_DM
E3
DP USW_DP
R314 0 FB303 1000
D4 D3
USB_DM R320 0 USB_DM ID USW_ID
E4 HB-1M1005-102JT
C324 USB_DP U309
R313 USB_DP
2.2uF
2.2k R315
ECCH0000198 FB302 1000 D1 A3
(2.2uF,6.3V,10%,1005) HSO_L AUDIO_L R2_2K
FB304 1000 TS5USBA33402 2.2k
C1
HSO_R AUDIO_R
A4
MIC
R318 100K C328
C2 (EUSY0372001)
RPWRON_EN DSS 22pF
B3
USW_INT _INT
C325
120pF A2 A1
I2C1_SDA SDA CLDO
B2
I2C1_SCL SCL
D2
GND
C332
C303 C304
10n
27p 27p
R305
USB_SEL
1K
SIM2_UART_RX
UART_RX
SIM1_UART_RX
4 3 2
1
L
K
J
FM_ANT
C334
10pF
I
H
G
F
E
D
C
B
A
1
LGE Internal Use Only