LG KE820 Service Manual page 101

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