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Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
7. CIRCUIT DIAGRAM
7. CIRCUIT DIAGRAM
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
L123
8.2n
1n
C141
1n
C140
+VPWR
82p
C124
U100
12
13
14
15
16
17
6
5
7
4
8
3
9
2
10
1
11
GND3
HB_RFIN
GND2
BAND_SEL
LB_RFOUT
TXEN
LB_RFIN
VBATT
GND1
VRAMP
NC
PGND
HB_RFOUT
GND6
GND5
GND7
GND4
R103
12
1n
C139
C122
10u
FL100
21
20
19
12
18
10
16
13
8
9
7
6
11
5
4
14
3
15
2
1
17
VC1
GSM1800/1900RX1
GSM1800/1900RX2
VC3
GSM900RX1
VDD
GSM900RX2
GSM850RX1
GND3
GSM850RX
2
GND1
GND2
TRX1
GND4
VC2
TRX2
GND5
ANT
GSM1800/1900T
X
GSM850/900TX
PGND
C123
100n
C134 1.2n
C150
0.75p
C143
0.5p
C110
22u
R1062.2K
C111
1.2n
L117
0.5p
C129
3.9p
C120
3.9n
1n
C108
12p
C109
100p
C137
100p
C146
C125
DNI
R102
1K
R101
1K
R100
1K
C107
33p
DNI
L122
L107
15n
VREG_MSMP_2.6V
C106
1u
DNI
C101
C144 100p
+VPWR
C103
8.2p
8.2n
L112
L111
8.2n
C100
4.7n
C136 10p
0.5p
C131
C145 10p
8.2p
C105
L105
DNI
R108
DNI
C149
DNI
L110 33p
100p
C102
L121
1.5n
2
1
L103 22n
L101 DNI
SW101
4
3
2
1
ANT
COMMON
G3
G4
C104 33p
C112
DNI
C147
8.2n
L120
33K
4.7n
L100
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
C114 33p
R110
36
C142
8.2n
L104
DNI
C126
6.8n
33p
C119
C155
100p
SW100
G1
AN
T
G2
100p
C154
4.7n
L102
C153
8.2p
R107100p
8.2n
L125
C152 3.9p
L126
8.2n
L124
5.6n
100p
C151
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
L106
DNI
C118
100p
C132
DNI
L109
10p
C113
DNI
L108 6p
C116
12n
C117
DNI
R104
430
L113
DNI
L118
DNI
C133
10n
R109
DNI
R105
430
L114
1p
C115
33p
836.5MHz
FL102
5 3 2
4
1
IN
OUT
G1
G2
G3
W850_TX_OUT
W850/GSM850_RX_M
W850/GSM850_RX_P
GSM_HB_TX
GSM_LB_TX
ANT_SEL[2]
ANT_SEL[1]
ANT_SEL[0]
GSM_PA_BAND
W1900_TX_OUT
GND
WCDMA_PA_ON1
GSM_PA_EN
GSM_PA_RAMP
DCS/PCS_RX_P
DCS/PCS_RX_M
PA_R0
PA_R1
PWR_DET
WCDMA_850
WCDMA_850
WCDMA_1900
WCDMA_1900
WCDMA_PA_ON2
TX_HB
TX_HB
TX_LB
TX_LB
W1900_RX_M
W1900_RX_P
GSM900_RX_M
GSM900_RX_P
about 6dB
RFMD(2G) PAM LOGIC
X
>0.25
0
1
1
PCS RX
ANT_SEL0
About 2dB
For Attenuator
TX_EN
0
1
0
0
0
0
1
0
1
Vramp
0
0
STANDBY
1
1
1
1
0
1
1608
TXLB
DCS RX
EGSM RX
GSM850 RX
TXHB
WB1900
WB850
DCS/PCS TX
GSM850/EGSM TX
Optional Lower Vcc(Pout ¡Â 7dBm)
ANT_SEL2
ANT_SEL1
GSM with FEM
ANTENNA SWITCH MODULE LOGIC
High Power Mode(Pout = 18dBm to Pmax)
Medium Power Mode(Pout = 7dBm to 18dBm)
Optional Lower Vcc(Pout ¡Â 7dBm)
1
1
1
1
WCDMA 1900
WCDMA_850
0
1
Low Power Mode(Pout ¡Â 7dBm)
High
Low
Low
1
B7696
B7955
FL102
W1900
W2100
>0.25
1
High
3G PA Modes of Operation
VEN_LB
VEN_HB
Medium Power Mode(Pout = 7dBm to 18dBm)
High Power Mode(Pout = 18dBm to Pmax)
Low Power Mode(Pout ¡Â 7dBm)
¥±
BAND SEL
High
High
0
X
High
WCDMA
High
Low
High
Low
¥±
¥±
¥´
Low
Low
Low
¥´
¥´
¥´
Power Setting
¥±
High
Low
VMODE0
Low
Low
Low
High
High
Low
High
High
Low
VMODE1
Low
Low
Low
High
Low
Low
High
On
Vcc
On
TBD
TBD
On
On
On
On
Band
<PA_ENABLE Signal>
W1900 : WCDMA_PA_ON1
W850 : WCDMA_PA_ON2