Circuit Diagram - LG -E400f Service Manual

7. CIRCUIT DIAGRAM

ANT100
ANT105
C118 100p L102 C109
1
100p 100p
R101
0.75p
2mm
GND
7
VBAT VBATT
18
ANT_SEL2 GPCTRL2
17
C1043 ANT_SEL1
C1044 GPCTRL1
19
22u
ANT_SEL0 GPCTRL0
47p
20
ANT_SEL3 TX_EN
21
VRAMP
22
PGND1
23
PGND2
24
GND2
8
R107
GSM_PA_RAMP
2.2K
C1024
39p
GSM_TX
GSM850(824-849MHz)
GSM900(880-915MHz)
DCS_PCS_TX
DCS(1710-1785 MHz)
PCS(1850-1910 MHz)
WCDMA RX 2100 LNA Circuit
VDD_RX
L118
2n
R120 33p L120
RX_WCDMA_2100_LNA_OUT
0
8.2n
C177
R121
RX_WCDMA_1900_LNA_OUT
DNI
FL103 3
ANT103
1575.42 MHz L124 3.3n
1 G3 4
IN OUT
G1 G2
5 2
L125 L126 C190
C232
DNI
1.5n 100n 0.5p
R127
3
GPS_MODE
2
12
C204
6.8p
LGE Internal Use Only
SW100
2
ANT COMMON
1
G3 4 3 G4
C116 R100
DNI 68n
FL1001
1 8
1842_5/1960MHz 1960MHz_1
9
1960MHz_2
4 6
GND5 1842_5MHz_1
2 7
L1006
GND1 1842_5MHz_2
3
3.3n
GND2
5 10
GND3 GND4
TRX2 WCDMA_850_RTX
13
TRX1 WCDMA_2100_RTX
12
RX2
11
RX1
10
GND7
U101
16
GND4
6
GND3
9
GND8
2
GND1
1
FL1002
1 IN 9
O1_1
8
O1_2
7
C1091 C1092 O2_1
56p 22p L1012
GND O2_2
4 6
9.1n
R116
75
10 5 3 2
11dB
R113
47
7dB
WCDMA DUAL
L123
WB2100_MIX_INP
FL101 1.8n
1 3
W2100 RX(2110 - 2170 MHz)
IN OUT
4 DNI
_OUT C173
G1 G3
5 2 WCDMA_2100_RTX
2140MHz
L119
WB2100_MIX_INM
1.8n
LNA for the GPS
Near To LNA
C191 L128 R125
VREG_RF_2.7V
DNI
12
4.7n
C192
C193
18p 0.1u
GND VDD
L130
5
GPS_IN
S_D FIL_OUT
4
100p
U104
C202
C203
WCDMA_850_RTX
0.5p DNI
R128
M7
TX_ON
RF_ON
C1
TCXO_RTR_19.2MHZ 0 TCXO
M3
RX_PCS_P RTR6285_SSBI
SBDT
C104 100p A10
GSM_TX
LB_RF_OUT1
L1014 B9
C1013 C105 100p
PCS(1930-1990 MHz) WCDMA_850_TX_OUT LB_RF_OUT2
1p DNI
C112 33p A9
DCS_PCS_TX HB_RF_OUT1
C1005 DNI A8
HB_RF_OUT2
RX_PCS_M C117 8.2p A7
WCDMA_2100_TX_OUT HB_RF_OUT3
C1006 56p N9
RX_WCDMA_850_P
WPRXLBP
C1036
C1007 56p M9
RX_WCDMA_850_M WPRXLBM
RX_DCS_P C1008 DNI N10
5.6n WPRXHBP
C1009 DNI N11
WPRXHBM
L1010
L1011
DCS(1805-1880 MHz)
DNI
0.75p H13
WDRXLB
C1040
J12
WDRXHB1
RX_DCS_M J13
5.6n
WDRXHB2
C13
RX_GSM_850_P
GCELL_INP
B13
RX_GSM_850_M GCELL_INN
RX_GSM_900_P
C12
RX_GSM_900_P EGSM_INP
B12
RX_GSM_900_M
EGSM_INN
L1008 L1007
DNI E13
15n RX_DCS_P
GSM(925-960 MHz) DCS_INP
D13
RX_DCS_M DCS_INN
RX_GSM_900_M E12
RX_PCS_P
GPCS_INP
D12
RX_PCS_M GPCS_INN
L110 100p
RX_GSM_850_P G13
GPS_IN GPS_IN
C136 33p A12
PDET_IN
PDET_IN
R108 12K A2
L111 TX_RBIAS
L1003 L1005
GSM(869-894 MHz)
1%
DNI 18n 6.8n
L113 DNI
K13
RX_WCDMA_HB WPRXSE1
C139 100p
L13
WPRXSE2
RX_GSM_850_M
Near To RTR
RX_WCDMA_2100_LNA_OUT
RX_WCDMA_1900_LNA_OUT
FL1008
6 1
ANT RX
3
TX
L1035 L1031
2 9
1.5n DNI GND1 GND6
4 8
GND2 GND5
5 7
GND3 GND4
1950MHz,2140MHz
Band I
RX_WCDMA_HB
C144 DNI
3.3p L116
PDET_IN
L112 3.3p
RX_WCDMA_850_P
C137 C138
DNI
6.8n
L114 3.3p
RX_WCDMA_850_M
FL2
6 1
ANT RX1
8
RX2
L129 3.3n
C1081 L1021
3
TX
DNI 15n
2
GND1
4 9
GND2 GND5
C197
5 7
GND3 GND4 DNI
Band V
- 132 -
A4
TX_IP
B5
TX_IN
B3
TX_QP
B4
TX_QN
E1 C106 10n
VTUNE1
C108 10n
N5
VTUNE2
G1 C113 1n
VTUNE_GPS
J1
PRX_QP RX0_Q_P
J2
RX0_Q_M
PRX_QN
K2
PRX_IP RX0_I_P
K1
PRX_IN RX0_I_M
L1
DRX_QP RX1_Q_P
L2
DRX_QN RX1_Q_M
M1
DRX_IP RX1_I_P
M2
DRX_IN RX1_I_M
N2
U100 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
F13
VDDA2_7
G2
VDDA2_8
L12
VDDA2_9 R110 0
M6
VDDA2_10 R111
N3
VDDA2_11
N6
VDDA2_12
N7
VDDA2_13
VREG_RF_2.7V_RTR
VREG_MSME_1.8V
C166 C167 C168
22p 0.1u
100p
VBAT
C172
C174 C175
U102 Close to pin1
330p
2.2u 330p
11
PGND
10 1
VCC2 VCC1
9 2
RFOUT RFIN
8 3
L121 3n
ISO VBP
7 4
C180 GND VMODE PA_R0
C183 6 5
CPL VEN PA_ON0 3.9n
1p
1p
C182
C184 C185
100p 100p
R122
51
R123 R124
8dB
110 110
VBAT
C186
C187 C188 680p
2.2u 680p
C121
U103
11
PGND
10 1
VCC2 VCC1
9 2 C194 33p 4
RFOUT RFIN
GND
8 3
ISO VBP
7 4 836.5MHz
GND VMODE PA_R0
6 5
22n
CPL VEN PA_ON1
C199
C200 C201
100p 100p
C198
DNI
7. CIRCUIT DIAGRAM
TX_I_P
C101
150p
C102
150p
TX_I_M
TX_Q_P
C114
150p
C119
150p
VREG_RF_2.7V_RTR
TX_Q_M
VREG_RF_2.7V
R102 0
+2.7V
0603
R103 VDD_RX
0
VREG_SMPS_2.1V
R106
0
R109
0
0
VREG_SMPS_2.1V|VSNS_RF_SMPS
1950MHz
FL102
4 1
OUT IN WCDMA_2100_TX_OUT
G3 G2 G1
5 3 2
3.3n
C181
DNI
FL104
1
OUT IN WCDMA_850_TX_OUT
G3 G2 G1
5 3 2
C196
15n
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Only for training and service purposes