LG KE820 Service Manual page 111

5. Trouble shooting
5.12.13 Checking FEM & Mobile SW
Circuit Diagram
C462
10p
Checking Points
SW40
R40
RX Mode
ANT_SW1
ANT_SW2
ANT_SW3
Mobile SW & FEM
SW401
KMS-506
C404
R406
G2
ANT RF
G1
0
100p
L408
2.7nH
Figure 30. Mobile SW & FEM Circuit
Figure 31 Mobile SW & FEM Input
EGSM
On
Off
Off
Table 5. FEM TX Control Logic
2V85_RF
C437
0.1u
GND11
GND10
ANT GND9
1
GND8
GND7
FL30
R403
DCS PCS
On On
On On
Off Off
- 112 -
26
25
24
23
11
R441
R405