Circuit Diagram - LG -E400 Service Manual

7. CIRCUIT DIAGRAM

ANT100
ANT105 SW100
C118 100p L102 C109
1 2
ANT COMMON
1
100p 100p
3 G3 4 G4
2mm
GND TRX2
7
VBAT VBATT TRX1
18
ANT_SEL2 GPCTRL2 RX2
17
C1043 ANT_SEL1
C1044 GPCTRL1 RX1
19
22u
ANT_SEL0 GPCTRL0 GND7
47p U101
20
ANT_SEL3 TX_EN GND4
21
VRAMP GND3
22
PGND1 GND8
23
PGND2 GND1
24
GND2
8
R107
GSM_PA_RAMP
2.2K
C1024
39p
C1091 C1092
56p 22p
R116
GSM_TX
75
GSM850(824-849MHz)
11dB
GSM900(880-915MHz)
R113
DCS_PCS_TX
47
DCS(1710-1785 MHz) 7dB
PCS(1850-1910 MHz)
WCDMA RX 2100 LNA Circuit
VDD_RX
L118
2n
FL101
R120 33p L120
RX_WCDMA_2100_LNA_OUT 1 3
IN OUT
0 4
_OUT
G1 G3
2 5
8.2n 2140MHz
C177
R121
RX_WCDMA_1900_LNA_OUT
DNI
LNA for the GPS
FL103 3
ANT103
1575.42 MHz
1 G3 4
IN OUT
G1 G2
2 5
Near To LNA
L125 L126 C190
C232
C191 L128
DNI
1.5n 100n 0.5p
DNI
4.7n
GND VDD
R127
3 5
GPS_MODE S_D FIL_OUT
2 4
12
U104
C202
C204
6.8p 0.5p
LGE Internal Use Only
C116 R100
DNI 68n
RX_PCS_P
Murata
EAM62492501
0.75p C1013
PCS(1930-1990 MHz)
FL1001 L1014 DNI
1 IN O1_1 9
RX_PCS_M
O1_2 8
7
O2_1
C1036
L1006
C_C5 O2_2 RX_DCS_P
4 6
3.3n
5.6n
2 3 5 10
L1010
0.75p DCS(1805-1880 MHz)
DNI
WCDMA_900_RTX
L1011
13
WCDMA_2100_RTX
12
C1040
11
RX_DCS_M
10 5.6n
16
6
RX_GSM_900_P
9
2
1
L1008 L1007
DNI
15n
FL1002 GSM(925-960 MHz)
1 IN 9
O1_1
RX_GSM_900_M
8
O1_2
7
O2_1
L1012 RX_GSM_850_P
GND O2_2
4 6
9.1n
2 3 5 10 L1003 L1005
GSM(869-894 MHz)
DNI 18n
RX_GSM_850_M
WCDMA DUAL
L123
WB2100_MIX_INP
1.8n
W2100 RX(2110 - 2170 MHz)
DNI
C173
WCDMA_2100_RTX
L119
WB2100_MIX_INM
1.8n L1035
1.5n
R125
VREG_RF_2.7V
12
C192
C193
18p 0.1u
L130
GPS_IN
100p
C203
WCDMA_900_RTX
DNI
C1081 L1021
DNI 12n
R128
M7
TX_ON
RF_ON
C1
TCXO_RTR_19.2MHZ 0 TCXO
M3
RTR6285_SSBI
SBDT
C104 100p A10
GSM_TX
LB_RF_OUT1
B9
C105 100p
WCDMA_850_900_TX_OUT LB_RF_OUT2
C112 33p A9
DCS_PCS_TX HB_RF_OUT1
C1005 DNI A8
HB_RF_OUT2
C117 8.2p A7
WCDMA_1900_2100_TX_OUT HB_RF_OUT3
C1006 56p N9
RX_WCDMA_900_P
WPRXLBP
C1007 56p M9
RX_WCDMA_900_M WPRXLBM
C1008 DNI N10
WPRXHBP
C1009 DNI N11
WPRXHBM
H13
WDRXLB
J12
WDRXHB1
J13
WDRXHB2 U100
C13
RX_GSM_850_P
GCELL_INP
B13
RX_GSM_850_M GCELL_INN
C12
RX_GSM_900_P EGSM_INP
B12
RX_GSM_900_M
EGSM_INN
E13
RX_DCS_P
DCS_INP
D13
RX_DCS_M DCS_INN
E12
RX_PCS_P
GPCS_INP
D12
RX_PCS_M GPCS_INN
L110 100p
G13
GPS_IN GPS_IN
C136 33p A12
PDET_IN
PDET_IN
R108 12K A2
L111 TX_RBIAS
1%
6.8n
L113 DNI
K13
RX_WCDMA_HB WPRXSE1
C139 100p
L13
WPRXSE2
Near To RTR
RX_WCDMA_2100_LNA_OUT
RX_WCDMA_1900_LNA_OUT
C166 C167 C168
22p 0.1u
100p
VBAT
FL1008
6 1 C174
ANT RX
2.2u
3
TX
L1031
DNI 2 9
GND1 GND6
4 8
GND2 GND5
5 7
1p
GND3 GND4
1p
C183
1950MHz,2140MHz
C180
Band I
RX_WCDMA_HB
C144 DNI
3.3p L116
R122
PDET_IN
51
R123 R124
8dB
110 110
VBAT
C187 C188
2.2u 680p
RX_WCDMA_900_P
C137 C138
DNI
6.8n
RX_WCDMA_900_M
FL2
6 1
ANT RX1
8
RX2
3
TX
2
GND1
4 9
GND2 GND5
C197 C198
5 7
GND3 GND4 DNI 0.75p
Band VIII
- 150 -
TX_I_P
C101
150p
A4
TX_IP
B5
TX_IN
C102
B3
TX_QP 150p
B4
TX_QN
E1 C106 10n
TX_I_M
VTUNE1
C108 10n
N5
TX_Q_P
VTUNE2
G1 C113 1n
VTUNE_GPS
C114
J1 150p
PRX_QP RX0_Q_P
J2
RX0_Q_M
PRX_QN
K2
PRX_IP RX0_I_P C119
K1
PRX_IN RX0_I_M 150p
L1
DRX_QP RX1_Q_P
L2 TX_Q_M
DRX_QN RX1_Q_M
M1
DRX_IP RX1_I_P
M2
DRX_IN RX1_I_M
N2
NC
A3
DAC_REF
DAC_IREF
A11
VDDA1_1
D1
VDDA1_2
D2
VDDA1_3
F1
VDDA1_4
H1
VDDA1_5
H2
VDDA1_6
A5
VDDA2_1
A6
VDDA2_2
B1
VDDA2_3
B6
VDDA2_4
B10
VDDA2_5
F2
VDDA2_6
R109
F13
VDDA2_7
G2
VDDA2_8 0
L12
VDDA2_9 R110 0
M6
VDDA2_10 R111
N3
VDDA2_11
N6
0
VDDA2_12
N7
VDDA2_13
VREG_RF_2.7V_RTR
VREG_SMPS_2.1V|VSNS_RF_SMPS
VREG_MSME_1.8V
C172
C175
U102 Close to pin1
330p
330p
11
PGND 1950MHz
10 1 FL102
VCC2 VCC1
9 2 4 1
RFOUT RFIN OUT IN
8 3 G3 G2 G1
ISO VBP
7 4 5 3 2
GND VMODE PA_R0
6 5 3.3n
CPL VEN PA_ON0 3.9n
C181
C182
C184 C185
100p 100p
C186
680p
U103 DNI
C121
11
PGND
10 1 FL104
VCC2 VCC1
9 2 C194 33p 4 1
RFOUT RFIN OUT IN
GND
8 3 G3 G2 G1
ISO VBP
7 4 5 3 2
GND VMODE PA_R0
6 5 897.5MHz
22n
CPL VEN PA_ON1
C199
C200 C201
100p 100p
Copyright © 2012 LG Electronics. Inc. All right reserved.
7. CIRCUIT DIAGRAM
VREG_RF_2.7V_RTR
VREG_RF_2.7V
R102 0
+2.7V
0603
R103 VDD_RX
0
VREG_SMPS_2.1V
R106
0
WCDMA_1900_2100_TX_OUT
WCDMA_850_900_TX_OUT
Only for training and service purposes