4. TROUBLE SHOOTING
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Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Schematic of the Antenna Switch Block
C1038
10u
1.2n
C1022
DNI
C1125
VBAT
U1001
16
15
14
13
12
11
10
17
9
8
7
6
4
3
28
1
44
43
42
41
40
39
38
37
36
35
32
33
34
24
23
22
29
30
31
18
21
25
20
26
19
27
5
2
GND2
GND5
GND13
TRX1
AN
T
TRX2
GND12
TRX3
VRAMP
PGND3
PGND2
PGND1
GND10
TRX4
GND11
PGND6
PGND5
PGND4
PGND7 PGND8 PGND9
PGND10
PGND11
PGND12
PGND13
PGND14
PGND15
PGND16
GND1
GND14
GND3
GND4
GND6
GND7
GND8
TX_HB_I
N
TXEN
TX_LB_I
N
BS
2
BS
1
VBAT
T
VC
C
GND9
MODE
C1039
100p
1
2
DNI
C1124
130
R1012
2
1
R1011
47
2
1
130
R1013
R100
8
91
2
1
R100
7
91
75
R1006
100p
C1046
1n
C1118
1
2
ANT_SEL2
ANT_SEL1
W1900_W2100_RTX
W850_W900_RTX
11dB
7dB
2mm
TP1