LG KS20 Operating Instructions Manual page 168

9. PCB LAYOUT
LD400
No Camera Flash LED
X400
No Bluetooth/FM Function
U304(PMIC)
No Power On
No USB/USIM Function
ANT400
Low Bluetooth Tx Power
Low Bluetooth Rx Sensitivity
X300(32.768kHz)
RTC Reset
U303
No USB Function
U301
No UART Function
No Bluetooth Power On
LGE Internal Use Only
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U401
Low Speaker Sound
U400
No Speaker/Receiver Sound
U402
No Headset Sound
U100 (BB/Modem)
No Power/Boot On
No Display No Service
U201(Memory)
No Boot
U300
No TA/USB Charging
U302
No TA Charging
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