LG GD580 Service Manual page 139

4. Trouble Shooting
E. DCS / PCS Tx mode
ANTSW1
ANTSW2
ANTSW3
DCS Tx
Logic OK?
WCDMA1900 Mode
LGE Internal Use Only
DCS / PCS Tx
MODE=2(DCS) or 1(PCS)
SWTX=0,699,255
High
Low
High
High
Figure 4-17-4. DCS / PCS Tx Mode
No
Yes
Change the Board
No
4.17 part Check
OK?
Yes
- 140 - Copyright © 2009 LG Electronics. Inc. All right reserved.
Try 4.17 part
Only for training and service purposes