LG KU950 - Page 86

4. TROUBLE SHOOTING
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Logic Table of the Antenna Switch
Checking Switch Block power source
Mode ANT_SEL0 ANT_SEL1 ANT_SEL2
EGSM TX HIGH HIGH LOW
EGSM RX HIGH LOW LOW
DCS/PCS TX LOW LOW HIGH
DCS RX HIGH LOW HIGH
PCS RX LOW HIGH LOW
UMTS LOW HIGH HIGH
Check Soldering of
ANT_SEL0, 1, 2 High Level
2.5V < Voltgae < 3.0V
Check VCC
TP1 VREG_RFRX_0_2.85V
Check the Logic
in each mode
YES
NO