LG GD580 - Page 136

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4. Trouble Shooting
B. EGSM Tx mode
EGSM Tx
MODE=0
SWTX=0,64,255
GSM850/EGSM Tx
Logic OK?
See the Next mode
(DCS Rx Mode)
No No
Yes Yes
Figure 4-17-1. EGSM Tx Mode
Try 4.17 part
4.17 part Check
OK?
ANTSW1:High Æ Low
ANTSW2:Low
ANTSW3:High
Change the Board
Change U101
ANTSW1
ANTSW2
ANTSW3
No
Yes
Low
High
Low
High