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GSM with FEM
L101 DNI
TP1
C102
100p
L103
22n
SW101
2
ANT
COMMON
GND
1
G3
G4
3
4
VREG_MSMP_2.6V
C106
C107
1u
33p
ANT_SEL[2]
R100
ANT_SEL[1]
R101
ANT_SEL[0]
R102
C111
TX_HB
C112
DNI
L108
TX_LB
C116
12n
Table.1
V
MIN
ramp
V
(TP4)
ramp
V
Input Current
ramp
Operating Case Temperature
Supply Voltage, V
LGE Internal Use Only
WCDMA_1900
WCDMA_850
33p
C104
L106
FL100
DNI
12
ANT
L107
13
GND4
GSM850RX1
14
VDD
GSM900RX2
15n
15
VC3
GSM900RX1
16
VC2
GSM1800/1900RX2
17
VC1
GSM1800/1900RX1
1K
TX_HB TX_LB
1K
1K
TP2
1.2n
U100
17
C113
PGND
16
HB_RFOUT
DNI
15
GND6
14
GND5
13
GND7
12
GND4
11
GND3
10
6p
GND2
9
LB_RFOUT
C117
DNI
TP3
V
ramp = 0.2V,1.6V
(TP5)
BATT
5
4
3
2
1
C108
C109
C110
1n
12p
22u
1
HB_RFIN
GSM_PA_BAND
2
BAND_SEL
3
GSM_PA_EN
TXEN
4
VBATT
5
VRAMP
R1062.2K
6
NC
7
C115
GND1
8
LB_RFIN
33p
For Attenuator
0
-25
3.0
- 60 -
Copyright © 2012 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
L100
4.7n
GSM900_RX_M
DNI
C100
C101
4.7n
L102
4.7n
GSM900_RX_P
DCS/PCS_RX_P
C103
8.2p
L104
DNI
DNI
L105
C105
8.2p
DCS/PCS_RX_M
+VPWR
TP5
GSM_PA_RAMP
TP4
C151
100p
R107100p
R109
R108
DNI
DNI
0
0.25
V
1.6
V
10
μA
+90
C
o
3.5
4.8
V
dc
Only for training and service purposes
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Troubleshooting
