LG GX500 - Page 106

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4. TROUBLE SHOOTING
GX500 Operational Description Revision A
LG Electronics 107/143 LGE Property
4.13.6 Checking FEM & Mobile SW
EGSM/GSM850 DCS/PCS
FE1 OFF ON
FE2 ON ON
TP4
G
TP1
TP3
TP2
SIM1 Circuit
SIM2 Circuit
TP1
TP5
TP1
TP2
TP3
TP4
SIM1
SIM2
TP5
TP5
Mobile SW & FEM Circuit
Figure 4-57. Mobile SW & FEM Circuit
Figure 4-58. Mobile SW & FEM
Table 4-5. FEM TX Control Logic
GX500 Operational Description Revision A
LG Electronics 107/143 LGE Property
4.13.6 Checking FEM & Mobile SW
EGSM/GSM850 DCS/PCS
FE1 OFF ON
FE2 ON ON
TP4
G
TP1
TP3
TP2
SIM1 Circuit
SIM2 Circuit
TP1
TP5
TP1
TP2
TP3
TP4
SIM1
SIM2
TP5
TP5
Mobile SW & FEM Circuit
Figure 4-57. Mobile SW & FEM Circuit
Figure 4-58. Mobile SW & FEM
Table 4-5. FEM TX Control Logic
GX500 Operational Description Revision A
LG Electronics 107/143 LGE Property
4.13.6 Checking FEM & Mobile SW
EGSM/GSM850 DCS/PCS
FE1 OFF ON
FE2 ON ON
TP4
G
TP1
TP3
TP2
SIM1 Circuit
SIM2 Circuit
TP1
TP5
TP1
TP2
TP3
TP4
SIM1
SIM2
TP5
TP5
Mobile SW & FEM Circuit
Figure 4-57. Mobile SW & FEM Circuit
Figure 4-58. Mobile SW & FEM
Table 4-5. FEM TX Control Logic
SW602
43
2
1
ANT COMMON
G3 G4
100NH
L601
1
LF
2
8
7
-A
N
34PSM
L
0
2
9131
1
1
8
1
5
18
417
216
95
4
013
612
1
17
ANT
1X
R0
5
8MS
G
2X
R0
5
8MS
G
1
CV
1XR
0
09MSG
2
CV
2XR
0
09MSG
1XR
0
0
81MSG
1
D
N
G
2XR0081MSG 2DNG 1XR0091MSG 3DNG
2XR
0
091MSG 4D
N
G
5
D
N
G
X
T
009
1
_00
8
1MS
G
XT0
0
9_
0
58MSG 1CN
2
CN
P001
6
1
6C
0.75p
C641
C636
47P47P
C637
VC2
VC1
5pL611
SW602
43
2
1
ANT COMMON
G3 G4
100NH
L601
1L
F
28
7
-AN34PSML
02 913
1
11
81 518 417
2
16 95
4
013
6
12
1
17
ANT
1X
R
058
MS
G
2X
R
05
8MS
G 1CV
1X
R0
0
9MS
G
2
CV
2X
R
0
0
9MS
G
1X
R0
0
8
1MS
G
1
D
N
G
2XR
0
0
81MSG
2D
N
G
1XR
0
09
1MS
G 3D
N
G
2XR009
1MS
G 4DNG
5D
N
G
X
T
0
0
91
_
0
08
1MS
G
X
T
0
0
9
_0
5
8MS
G 1CN
2CN
P0
0
1
6
1
6
C
0.75p
C641
C636
47P47P
C637
18n
C632
VC2
VC1
L
GSM 1800 / 1900_ RX
GSM 1800 / 1900_ TX
VC2 (FE2)
L
GSM850 / 900_RX
L
L
VC1 (FE1)
L
L
GSM850 / 900_TX
H
H
TP1 TP2
TP3 TP4
SIM1 Circult
SIM2 Circult
TP5
GX500 Operational Description Revision A
LG Electronics 107/143 LGE Property
4.13.6 Checking FEM & Mobile SW
EGSM/GSM850 DCS/PCS
FE1 OFF ON
FE2 ON ON
TP4
G
TP1
TP3
TP2
SIM1 Circuit
SIM2 Circuit
TP1
TP5
TP1
TP2
TP3
TP4
SIM1
SIM2
TP5
TP5
Mobile SW & FEM Circuit
Figure 4-57. Mobile SW & FEM Circuit
Figure 4-58. Mobile SW & FEM
Table 4-5. FEM TX Control Logic