LG LG-E410 - Page 40

4. TROUBLE SHOOTING
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Only for training and service purposes
LGE Internal Use Only
Checking Switch Block Power Source
Check ANT_SEL 0,1,2,3
High Level
1.2V < Voltage < 3V
Check the TP1(VBATT)
No
Yes
Check the Logic
In each mode
Antenna Switch Module logic(SKY77584)
ANT_SEL 0 ANT_SEL 1 ANT_SEL 2 Tx_EN
STAND-BY LOW LOW LOW LOW
GTX_LB LOW LOW HIGH HIGH
GTX_HB LOW HIGH HIGH HIGH
GRX_LB HIGH LOW LOW LOW
GRX_HB HIGH HIGH LOW LOW
WTRX_HB HIGH LOW HIGH LOW
WTRX_LB LOW HIGH LOW LOW