LG GS290 - Page 90

- 91 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
GS290 Operational Description Revision B
LG Electronics 91/136 LGE Property
Check
T
P1 of SW500
with RF Cable
and TP2 of C524
T
P1 Signal same
as TP2
?
Replace Mobile SW (SW500)
Yes
No
Yes
Mobile SW & FEM is OK.
Check Antenna.
Replace U100
Control Signal is
OK
?
No
Yes
Check
T
P3, TP4 of FL500 ?
Replace FEM (FL500)
T
P5~8 Signal is
OK
?
No
Yes
Checking Flow
Figure 10 Mobile SW (R403) Figure 11 FEM Control Signals
DCS/PCS
RX
FE1
FE2