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4. TROUBLE SHOOTING
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Copyright © 01 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
C137
DNI
U102
6
5
7
4
8
3
9
2
10
1
11
PGND
VCC1
VCC2
RFIN
RFOUT
VBP
ISO
VMODE
GND
VEN
CPL
U103
6
5
7
4
8
3
9
2
10
1
11
PGND
VCC1
VCC2
RFIN
RFOUT
VBP
ISO
VMODE
GND
VEN
CPL
L1031
DNI
C144
3.3p
2.2u
C187
C181
3.3n
C199
22n
C183
1p
1950MHz
FL102
5
3
2
4
1
IN
OUT
G1
G2
G3
C138
6.8n
C174
2.2u
897.5MHz
FL104
5
3
2
4
1
IN
OUT
G1
G2
G3
C197
DNI
330p
C172
680p
C186
n7.
2
59
1
C
87
1
C
n7.
2
DNI
L116
FL2
7
5
8
4
9
2
3
1
6
ANT
RX1
TX
GND1
GND5
GND2
RX2
GND3
GND4
110
R123
110
R124
12
1
L
n3
22
1
L
p7
2
09
01
C
p8
1
FL1008
1950MHz,2140MHz
7
5
8
4
9
2
3
1
6
ANT
RX
TX
GND1
GND6
GND2
GND5
GND3
GND4
51
1
L
n4.
2
n9.
3
97
01
C
L1021
12n
C182
3.9n
21
1
L
n0
1
92
1
L
n7.
2
C198
0.75p
C180
1p
69
1
C
I
N
D
100p
C184
n0
1
41
1
L
L1035
1.5n
C121
DNI
C188
680p
VBAT
100p
C185
C175
330p
VBAT
R122
51
33p
C194
9.
94
62
1
R
100p
C201
100p
C200
DNI
C1081
GND
PA_ON0
PA_R0
PA_R0
RX_WCDMA_HB
PDET_IN
RX_WCDMA_900_P
RX_WCDMA_900_M
WCDMA_850_900_TX_OUT
WCDMA_1900_2100_TX_OUT
WCDMA_2100_RTX
WCDMA_900_RTX
PA_ON1
8dB
Close to pin1
Band I
Band VIII
TP3
TP1
TP2