LG -E405 Service Manual page 45

W2100 RX(2110 - 2170 MHz)
WCDMA_2100_RTX
TP2
WCDMA_900_RTX
VDD_RX
R1015
RX_WCDMA_2100_LNA_OUT
0
R1016
RX_WCDMA_1900_LNA_OUT
DNI
LGE Internal Use Only
FL1002
C1085
6 1
ANT RX
3.9p
3
TX
L1020
L1021
2 7
DNI 3n
GND1 GND4
4 8
GND2 GND5
5 9
GND3 GND6
1950MHz, 2140MHz
Band I
TP3
3.3p
L1029
C1104
DNI
3.3p
FL1007
10p L1031
6 1
ANT RX1
8
RX2
C1111
C1112
5.6n
3
TX
DNI
2
GND1
L1033 4 9
GND2 GND5 C1116
5 7
GND3 GND4
0.5p
Band V
Bias
WCDMA RX 2100 LNA Circuit
L1017
2n
C1086
8.2n
L1015
RX_WCDMA_HB
2n
L1016
C1076
3.6n
DNI
VBAT
C1081 C1082
2.2u 330p
11
PGND
10
VCC2
9
RFOUT
8
ISO
7
GND
C1091
C1089 6
CPL
DNI
3.9n
R1017
PDET_IN
51
R1019
R1018
8dB
110 110
VBAT
C1096 C1097
2.2u 680p
11
PGND
10
VCC2
9
RX_WCDMA_900_P
RFOUT
8
ISO
C1103 7
GND
6.8n 6
CPL
RX_WCDMA_900_M
DNI
C1117
FL1003
1 3
IN OUT
DNI
4
_OUT C1083
G1 G3
2 5
2140MHz
TP5
- 45 - Copyright © 2012 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
C1080
U1002 Close to pin1
330p
1 1950MHz
FL1004
VCC1
2
4 1
RFIN
OUT IN
3
G3 G2 G1
NC
4
5 3 2
VMODE PA_R0
5
3.9n
VEN PA_ON0
C1090
C1093 C1094
100p 100p
C1095
680p
U1003
1
L1102
VCC1
2 R1020
RFIN
3
12
NC
4
VMODE
PA_R0
5 C1107
VEN PA_ON1
2p
C1109 C1110
100p 100p
Tx SAW filter is deleted.12/01/02
L1018
WB2100_MIX_INP
1.8n
W2100 RX(2110 - 2170 MHz)
L1024
WB2100_MIX_INM
1.8n
Only for training and service purposes
WCDMA_1900_2100_TX_OUT
3.3n
C1088
5.6n
WCDMA_850_900_TX_OUT
C1108
DNI