LG U8120 Service Manual page 148

D. DCS Tx Mode
ANTSW1
ANTSW2
ANTSW3
DCS Tx
Logic OK?
Yes
WCDMA Mode
DCS Tx
MODE=2
SWTX= 1,6 99 ,0 ,1 02 4,1
Low
High
Low
Figure 4-24. DCS Tx Mode
No
4.4. 1 p ar t Check
OK?
Yes
Change the Board
- 149 -
4. TROUBLE SHOOTING
No
Try 4.4.1 part