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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
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Schematic of the Antenna Switch Block
TP1
2.2K
R1006
U1002
31
30
29
44
43
42
41
40
39
38
73
63
53
16
15
41
31
21
11
01
34
33
32
17
9
18
8
19
7
20
6
21
5
22
4
32
3
42
2
52
62
72
82
1
DCS_PCS_IN
11
D
N
G
01
D
N
G
9
D
N
G
8
D
N
G
GND1
7
D
N
G
GSM_IN
6
D
N
G
VAPC
GND5
VBATT
GND4
BS2
GND3
BS1
GND2
_TXEN
ANT
E
D
O
M
WCDMA3
PGND4
PGND5
PGND6
P
M
ET
4
X
R
3
X
R
2
X
R
1
X
R
WCDMA1
WCDMA2
7
D
N
G
P
8
D
N
G
P
9
D
N
G
P
PGND10
PGND11
PGND12
PGND13
PGND14
PGND15
PGND16
PGND1
PGND2
PGND3
39p
C1024
03
1
4
R
47
R6
03
1
5
R
+VPWR_RF
C1043
10u
75
R7
19
61
R
C1045
1n
1n
C1047
1n
C1048
C1051
1n
19
51
R
47p
C1044
ANT_SEL1
ANT_SEL2
ANT_SEL0
ANT_SEL3
GSM_PA_RAMP
DCS_PCS_TX
GSM_TX
0603
2mm
11dB
7dB
GSM850(824-849MHz)
80
61
GSM900(880-915MHz)
PCS(1850-1910 MHz)
DCS(1710-1785 MHz)
0603
TP1