texet X-Navi, Service Manual

Page: 11 / 12

End
2
、
RF parts
2.1
、
2G RX failure
2G Dual band RX failure
check the antenna contact with shrapnel
try to Re-welding
or
Check all control signals of Check the RX output signal
change U701
U701: PAEN, BANDSW, and from Z600
MODE_PA
Re-welding or change Z600
Check U600 and the components
around it.
Check or try to change U600 and U101
End
2.2
、
2G TX failure
2G TX failure
check the antenna contact with shrapnel
Try to Re-welding
or
Check all control signals of Re-welding or change
Change U701
U701: PAEN, BANDSW, and U600
MODE_PA
Re-welding or change U101
End
2.3
、
3G TX/RX failure