LG KS20 - Page 88

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4. TROUBLE SHOOTING
Logic Table of the FEM
LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check VCC
TP1 VRF_SMPS
ANT_SEL0 ANT_SEL1 ANT_SEL2
GSM 850/GSM 900 TX HIGH HIGH LOW
GSM 1800/GSM 1900 TX HIGH LOW LOW
GSM 850 RX - - -
GSM 900 RX LOW LOW LOW
GSM 1800 RX LOW LOW LOW
GSM 1900 RX LOW LOW HIGH
WCDMA HIGH LOW HIGH