LG KE770 Service Manual page 93

5. Trouble shooting
5.12.5 FEM & Mobile SW
Test Points
Circuit Diagram
MAIN PCB_BOTTOM SIDE
ANT_SW1
ANT_SW2
PGSM/EGSM_Tx
Ant SW 1
U403
Ant SW 2
Figure 4-10
CN401
R401
WFL-R-SMT10
2
0
G1
3
G2
4
G3 ANT C401
NA
PGSM/EGSM_Tx
2V85_RF
U403
A1 Y1
GND VCC
A2 Y2
NC7WV16P6X
VC1 VC2
H L
SW401
PIN17
SW401
KMS-518
G1 A C G2
C402
NA
VC1 VC2
H L
DCS/PCS_Tx L H
PGSM_Rx L L
EGSM_Rx L L
DCS_Rx L L
PCS_Rx L L
9
11
16
C495
18
1000p
19
20
14
13
10
C497
C498 C499
10p
100p 100p
- 94 -
FL401
PIN1
L409
100nH
C496
22p
FL401
1
GSM850_RX_OUT1
GND1
2
GSM850_RX_OUT2
GND2
3
GND3 GSM900_RX_OUT1
4
GND4 GSM900_RX_OUT2
5
GND5 GSM1800_RX_OUT1
6
GSM1800_RX_OUT2
GND6
7
GSM1900_RX_OUT1
8
VC1 GSM1900_RX_OUT2
VC2
12
GSM1800_1900_TX
15
ESD GSM850_900_TX
LSHS-M085FE