LG KS20 Operating Instructions Manual page 88

4. TROUBLE SHOOTING
Logic Table of the FEM
GSM 850/GSM 900 TX
GSM 1800/GSM 1900 TX
GSM 850 RX
GSM 900 RX
GSM 1800 RX
GSM 1900 RX
WCDMA
LGE Internal Use Only
ANT_SEL0 ANT_SEL1
HIGH
HIGH
-
LOW
LOW
LOW
HIGH
- 90 -
ANT_SEL2
HIGH
LOW
-
LOW
LOW
LOW
LOW
Check VCC
TP1 VRF_SMPS
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Only for training and service purposes
LOW
LOW
-
LOW
LOW
HIGH
HIGH