LG CE110 Service Manual page 38

3.4.9 Bottom System Connector
Pin # CE110
18Pin
1 GND
2 HSMICIP/HOOK DETECT
3 JACK_TYPE
4 HSO_L
5 HSO_R
6 UART3_TX/USB_DP
7 UART3_RX/USB_DM
8 JACK_DETECT
9 VBAT
10 VBAT
11 RPWON
12 VCHG_IN
13 VGHG_IN
14 UART3_DSR
15 VBUS
16 UART2_TX
17 UART2_RX
18 GND
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Only for training and service purposes
3. Circuit Description
Description
GND
HEAD SET
HAED SET
CHARGING (VCHG)
CHARGING (VCHG)
USB/UART3 (Transmit Data)
USB/UART3 (Receive Data)
HEAD SET
BATTERY(+4.2V)
BATTERY(+4.2V)
REMOTE POWER ON
CHARGING (VCHG)
CHARGING (VCHG)
UART3 (Transmit Data)
USB POWER( +5.0 V)
TEST : UART2 (Transmit Data)
TEST : UART2 (Receive Data)
GND
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LGE Internal Use Only