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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
942.5MHz
FL1
4
5
1
3
2
G1 O1
IN
G2 O2
DNI
R9
10p
C23
3.3p
C26
8.2n
L2
8
R
0
10n
C20
DNI
R12
VREG_TCXO_2.85V
BGA735L16
U2
9
8
7
6
5
01
4
11
3
21
2
31
1
14
15
16
17
PGND
RFOUTM
RFOUTH
RFOUTL
C
N
F
E
R
R
S
G
V
1
N
E
V
C
C
V
2
N
E
V
1
H
D
N
GF
R
L
NI
F
R
2
H
D
N
GF
R
RFINM
RFINH
RFGNDM1
RFGNDM2
1.5p
C36
DNI
C1148
10p
C27
3.3n
L7
2.7n
L6
1.5p
C37
22n
L8
10n
L9
2.2n
L10
DNI
C1128
22p
C24
L4000
DNI
1
R24
3.3n
C10
12p
C28
0
01
R
27K
R18
C1728
DNI
4.7p
C15
C1928
DNI
100p
C14
0
R14
RX_WCDMA_2100
RX_WCDMA_900_P
RX_WCDMA_900_M
RX_WCDMA_1900_SE
INTER_RX_SW_SEL_1
INTER_RX_SW_SEL_2
LNA_GAIN_CONTROL
0603
TP3
TP3
TP4
TP4
K1
91
01
R
76
01
C
u1.
0
p0
01
86
01
C
3.9p
C1069
L1018
1.8n
2n
L1017
L1019
1.8n
DNI
C1070
C1080
3.9p
C1073
DNI
VDD_RX
C1072
33p
33p
C1071
2140MHz
FL1003
4
5
1
3
2
G1 O1
IN
G2 O2
DNI
R1021
R1029
DNI
WB2100_MIX_INM
WB2100_MIX_INP
RX_WCDMA_1900_LNA_OUT
RX_WCDMA_2100_LNA_OUT
3
0
6
0
W2100 RX(2110 - 2170 MHz)
Bias
TP5