LG GS290 Service Manual page 90

GS290 Operational Description
Checking Flow
with RF Cable and TP2 of C524
Check TP3, TP4 of FL500 ?
Mobile SW & FEM is OK.
Figure 10 Mobile SW (R403)
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Only for training and service purposes
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Check TP1 of SW500
TP1 Signal same
as TP2?
Yes
Yes
Control Signal is
OK ?
Yes
TP5~8 Signal is
OK ?
Yes
Check Antenna.
91/136
4. TROUBLE SHOOTING
No
Replace Mobile SW (SW500)
No
Replace U100
No
Replace FEM (FL500)
DCS/PCS RX
Figure 11 FEM Control Signals
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Revision B
FE1
FE2
LGE Internal Use Only
LGE Property