LG GS290 - Page 89

- 90 -
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4. TROUBLE SHOOTING
GS290 Operational Description Revision B
LG Electronics 90/136 LGE Property
4.12.3 Checking Mobile SW & FEM
EGSM/GSM850 DCS/PCS
VC1 OFF OFF
VC2 OFF OFF
SW500
FL500
TP1G
TP2G
TP5 ~ 8G
TP3_C508 (VC2)G
Mobile SW & FEM Circuit Diagram
Figure 8. Mobile SW & FEM Circuit
Checking Points
Figure 9. Mobile SW & FEM
Table 2. FEM RX Control Logic
TP4
TP3
TP1 TP2
TP4_C503 (VC1)G
22p
C524
KMS-518_P
SW500
G1
A
C
G2
100n
L501
C539
DNI
100R502
100R504
C503
47p
C508
47p
LMSP43NA-782
FL500
02
9131
11
81 5
18
417 216
9
5
4
013 612
1
17
ANT
1XR058MSG
2XR058MSG 1CV 1XR
0
09MSG 2CV
2X
R0
09
MS
G
1XR0081MSG 1DNG
2XR0081MSG 2DNG
1X
R0
0
91MSG 3DNG
2X
R
009
1
MSG 4
D
N
G
5DNG
XT0091_0081MSG
X
T
0
09_
0
58MSG 1CN
2
C
N
VC1
VC2
TP1
TP2
TP4
TP3