LG E475F Service Manual page 30

1
LGE Internal Use Only
1
GND1
2
GND2
3
GND3
4
GND4
5
GND5
6
GND6
7
GND7
8
GND8
29
PGND1
30
PGND2
31
PGND3
32
PGND4
33
PGND5
34
PGND6
R1011
1 2
47
7dB
2
R1006
75
11dB
C1201
DNI
1 2
Schematic of the Antenna Switch Block
PGND16
PGND15
PGND14
PGND13
U1001
VRAMP
PGND12
PGND11
PGND10
2mm
2 2
C1118 C1039
1n 100p
1 1
C1125 C1124
DNI DNI
- 30 - Copyright © 2013 LG Electronics. Inc. All right reserved.
3. TROUBLE SHOOTING
44
43
42
41
22
GND10
21
TRX3
20
TRX2
19
TRX1
18
17
TXEN
16
MODE
15
GND9
40
39
38
VBAT
TP1
C1038
10u
ANT_SEL1
ANT_SEL2
Only for training and service purposes
W850_W900_RTX
W1900_W2100_RTX