LG U830 KU830 Service Manual page 87

4. TROUBLE SHOOTING
Test Point (RF Rx Level)
TP2
TP1
< Bottom Side>
TP4
TP3
< Top Side>
TP1: RF Mobile Connector Output
TP2: FEM Output
TP3: Duplxer Output
TP4: WCDMA LNA Output
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