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4. TROUBLE SHOOTING
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Copyright © 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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ͽͶ͑ ͺΟΥΖΣΟΒΝ͑ ΆΤΖ͑ ΟΝΪ͑
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SAW Filter
FIG 20 Schematic of WCDMA I Tx SAW Filter
FIG 21 Schematic of WCDMA VIII Tx SAW Filter
FIG 22 Schematic of WCDMA IV Tx SAW Filter
{wGXXG
{wGXWG
{wG`G
{wGXY
{wGXZ
{wGX[
6.8n
L118
1950MHz
FL104
5 3 2
4
1
IN
OUT
G1
G2
G3
897.5MHz
FL105
5 3 2
4
1
IN
OUT
G1
G2
G3
2.7n
C151
33p
C131
1732.5 MHz
FL103
5 3 2
4
1
IN
OUT
G1
G2
G3
2.7n
L117
1p
C33
0.5p
L119
33p
C150
DNI
C112
1.8n
L104
1n
L109
DNI
C156
15n
C122
DNI
C157
33p
C152
DNI
L151
0.5p
L150
33p
C153
TX_AWS
TX_W2100
TX_W900
6.8n
L118
1950MHz
FL104
5 3 2
4
1
IN
OUT
G1
G2
G3
897.5MHz
FL105
5 3 2
4
1
IN
OUT
G1
G2
G3
2.7n
C151
33p
C131
1732.5 MHz
FL103
5 3 2
4
1
IN
OUT
G1
G2
G3
2.7n
L117
1p
C33
0.5p
L119
33p
C150
DNI
C112
1.8n
L104
1n
L109
DNI
C156
15n
C122
DNI
C157
33p
C152
DNI
L151
0.5p
L150
33p
C153
TX_AWS
TX_W2100
TX_W900
6.8n
L118
1950MHz
FL104
5 3 2
4
1
IN
OUT
G1
G2
G3
897.5MHz
FL105
5 3 2
4
1
IN
OUT
G1
G2
G3
2.7n
C151
33p
C131
1732.5 MHz
FL103
5 3 2
4
1
IN
OUT
G1
G2
G3
2.7n
L117
1p
C33
0.5p
L119
33p
C150
DNI
C112
1.8n
L104
1n
L109
DNI
C156
15n
C122
DNI
C157
33p
C152
DNI
L151
0.5p
L150
33p
C153
TX_AWS
TX_W2100
TX_W900
TP10
TP13
TP11
TP14
TP9
TP12