LG GX500 - Page 97

- 98 -
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Only for training and service purposes
4. TROUBLE SHOOTING
GX500 Operational Description Revision A
LG Electronics 98/143 LGE Property
Check
T
P1 of (SW401/SW602)
with RF Cable and TP2 of
(
C418/C616
)
T
P1 Signal same as
T
P2?
Replace Mobile SW
(SW401/SW602)
Yes
No
Yes
Mobile SW & FEM is OK.
Check Antenna.
Replace U101 / U503
Control Signal is
O
K
?
No
Yes
Check
T
P3, TP4 of FL401/FL1 ?
Replace
FEM (FL401/FL1)
T
P5~8 Signal is
OK
?
No
Yes
Yes
Checking Flow
Figure 4-39 Mobile SW (R403)
Figure 4-40 FEM Control Signals
DCS/PCS
RX
FE1
FE2