LG GX500 Service Manual page 106

GX500 Operational Description
4.13.6 Checking FEM & Mobile SW
Mobile SW & FEM Circuit
Mobile SW & FEM Circuit
Mobile SW & FEM Circuit
TP2
TP1
TP1
TP1
Figure 4-57. Mobile SW & FEM Circuit
Figure 4-57. Mobile SW & FEM Circuit
Figure 4-57. Mobile SW & FEM Circuit
TP5
SIM1
Figure 4-58. Mobile SW & FEM
Figure 4-58. Mobile SW & FEM
Figure 4-58. Mobile SW & FEM
Table 4-5. FEM TX Control Logic
EGSM/GSM850
FE1 OFF
FE2 ON
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Mobile SW & FEM Circuit
ANT
1
C641
0.75p
SIM1 Circuit
TP5
SIM1 Circuit
SIM1 Circuit
TP2
TP2 TP2
TP5
TP1 TP2
TP1 TP5
5p L 611
C632
C641
18n
0.75p
SIM2 Circuit
SIM2 Circuit
SIM2 Circuit
Figure 4-57. Mobile SW & FEM Circuit
TP3
TP3
TP3
TP4
TP4
TP4
TP2
TP2
TP2
TP1
TP5
TP5 TP5
TP1
TP1
SIM1
SIM1 SIM1
Figure 4-58. Mobile SW & FEM
Table 4-5. FEM TX Control Logic
Table 4-5. FEM TX Control Logic Table 4-5. FEM TX Control Logic
DCS/PCS
EGSM/GSM850
EGSM/GSM850 EGSM/GSM850
ON
FE1 OFF
FE1 OFF FE1 OFF
ON
FE2 ON
FE2 ON FE2 ON
107/143
107/143
107/143
SW602
2
COMMON ANT
17
G3 G4
4 3 100NH
L601
TP3
TP4
TP1
SIM1 Circult
TP3
TP3
SIM1 Circuit
VC1 (FE1) VC2 (FE2)
TP5
TP5
GSM850 / 900_TX H L
GSM 1800 / 1900_ TX L H
GSM850 / 900_RX L L
GSM 1800 / 1900_ RX L L
SW602
2
ANT COMMON
1 17
G3 G4
4 3
100NH
L601
SIM2 Circult
SIM2 Circuit
TP3
TP4
TP5
TP2
TP5
TP5
TP1
SIM2
SIM2
SIM2
DCS/PCS
DCS/PCS DCS/PCS
ON
ON ON
ON
ON ON
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LGE Property
107/143
4. TROUBLE SHOOTING
Revision A
Revision A
Revision A
VC1
VC2
C637 C636
47P 47P
TP TP4
TP4
TP3
TP4 TP4
TP1
TP1 TP1
VC1
VC2
C637 C636
47P 47P
ANT
TP5
SIM2
LGE Property
LGE Property
Revision A
LGE Internal Use Only
LGE Property