LG U8550 Service Manual page 148

A. EGSM Rx mode
ANTSW1
ANTSW2
ANTSW3
B. EGSM Tx mode
ANTSW1
ANTSW2
ANTSW3
EGSM Rx
MODE=0
SWRX=64,1024,2
LOW
LOW
High
Figure 4-19-2. EGSM Rx Mode
EGSM Tx
MODE=0
SWTX=1,64,7,1024,1
LOW
LOW
High
Figure 4-19-3. EGSM Tx Mode
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4. TROUBLE SHOOTING