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4. TROUBLE SHOOTING
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LGE Property
4.12.3 Checking Mobile SW & FEM
EGSM/GSM850
DCS/PCS
VC1 OFF
OFF
VC2 OFF
OFF
SW501
FL50
TP1
TP5 ~ 8
TP3_C506
TP4_C505
TP2
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
L502
DNI
C521
DNI
100ohms
R505
100ohms
R506
C525
47pF
C528
47pF
1.8p
C530
ANT504
18n
C537
ANT505
C542
100pF
ANT506
SW501
4
3
2
1
ANT
COMMON
G3
G4
FL500
0
2
9
1
3
1
1
1
8
1
5
1
8
4
1
7
2
1
6
9
5
4
0
1
3
6
1
2
1
17
ANT
1
X
R0
58
M
S
G
2
X
R0
58
M
S
G
1
C
V
1
X
R0
09
M
S
G
2
C
V
2
X
R0
09
M
S
G
1
X
R0
08
1
M
S
G
1
D
N
G
2
X
R0
08
1
M
S
G
2
D
N
G
1
X
R0
09
1
M
S
G
3
D
N
G
2
X
R0
09
1
M
S
G
4
D
N
G
5
D
N
G
XT
00
91
_0
08
1
M
S
G
XT
00
9_
05
8
M
S
G
1
C
N
2
C
N
DNI
C554
82pF
C9
4.7pF
C10
56pF
C8
VC2
VC1
(FROM Transceiver)
(FROM Transceiver)
TP4
TP
TP2
TP1
Содержание GM360i
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