LG U8120 Service Manual page 149

4. TROUBLE SHOOTING
E. WCDMA Mode
ANTSW1
ANTSW2
ANTSW3
WCDMA
Logic OK?
Input Signal and Power to
Antenna Switch Block is OK.
See the Next P age
Low
Low
Low
Figure 4-25. WCDMA Mode
No
4.4. 1 p ar t Check
Yes
Change the Board
WCDMA Mode
MODE=4
WTXC=9 75 0, 0,1, 0
SYCT= 107 00
TXGN=1,4 3
No
OK?
Yes
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Try 4.4.1 part