LG GX500 Service Manual page 97

4. TROUBLE SHOOTING
GX500 Operational Description
Checking Flow
Check TP1 of (SW401/SW602)
with RF Cable and TP2 of (C418/C616)
Check TP3, TP4 of FL401/FL1 ?
Mobile SW & FEM is OK.
Figure 4-39 Mobile SW (R403)
LGE Internal Use Only
LG Electronics
TP1 Signal same as
TP2?
Yes
Yes
Yes
Control Signal is
OK ?
Yes
TP5~8 Signal is
OK ?
Yes
Check Antenna.
98/143
No
Replace Mobile SW
(SW401/SW602)
No
Replace U101 / U503
No
DCS/PCS RX
Figure 4-40 FEM Control Signals
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Revision A
Replace
FEM (FL401/FL1)
FE1
FE2
Only for training and service purposes
LGE Property