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4. TROUBLE SHOOTING
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Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
VREG_MSMP_2.6V
100p
C102
L103 22n
L101 DNI
SW101
4
3
2
1
ANT
COMMON
G3
G4
C104 33p
SW100
G1
AN
T
G2
L106
DNI
GND
TP9
U101
8
7
9
6
10
5
11
4
12
3
13
2
14
1
15
GND5
RFIN_LB
RFOUT_LB
VMODE0
GND4
VMODE1
VCC2
VCC1
GND2
VEN_LB
RFOUT_HB
VEN_HB
GND1
RFIN_HB
CPL_OUT
150
R111
1n
C138
1n
C141
1n
C140
+VPWR
82p
C124
1n
C139
C122
10u
C123
100n
C134 1.2n
C150
0.75p
C143
0.5p
L117
0.5p
C129
3.9p
C120
3.9n
100p
C137
100p
C146
C125
DNI
DNI
L122
C144 100p
8.2n
L112
L111
8.2n
C136 10p
0.5p
C131
C145 10p
C149
DNI
L110 33p
L121
1.5n
2
1
C147
8.2n
L120
33K
3.9n
L119
L115 33p
DNI
C127
FL104
1880 MHz,1960 MHz
9
5
8
4
7
2
3
6
1
RX1
ANT
TX
GND1
GND4
GND2
RX2
GND3
GND6
R112
150
R110
36
C142
8.2n
C126
6.8n
FL103
5 3 2
4
1
IN
OUT
G1
G2
G3
FL101
836.5 MHz,881.5 MHz
9
5
7
3
1
2
8
4
6
ANT
GND2
RX_OUT2
GND1
RX_OUT1
TX_IN
GND4
GND3
GND5
C128
1n
L116 100p
C132
DNI
L109
10p
L113
DNI
L118
DNI
C133
10n
L114
1p
836.5MHz
FL102
5 3 2
4
1
IN
OUT
G1
G2
G3
W850_TX_OUT
W850/GSM850_RX_M
W850/GSM850_RX_P
W1900_TX_OUT
WCDMA_PA_ON1
PA_R0
PA_R1
PWR_DET
WCDMA_850
WCDMA_1900
WCDMA_PA_ON2
W1900_RX_M
W1900_RX_P
about 6dB
1608
WCDMA 1900
WCDMA_850
B7696
B7955
FL102
W1900
W2100
WCDMA
<PA_ENABLE Signal>
W1900 : WCDMA_PA_ON1
W850 : WCDMA_PA_ON2
TP8
TP5
TP4
TP1
TP2
TP3
TP6
TP7