Lge Internal Use Only - LG -E400 Service Manual

FL1008
6
ANT
WCDMA_2100_RTX
L1035 L1031
1.5n DNI 2
GND1
4
GND2
5
GND3
1950MHz,2140MHz
Band I
FL2
6
ANT RX1
WCDMA_900_RTX
RX2
C1081
L1021
TX
12n
DNI
2
GND1
4
GND2 GND5
5
GND3 GND4
Band VIII

LGE Internal Use Only

1
RX
3
TX
9
GND6
8
GND5
7
GND4
RX_WCDMA_HB
C144 DNI
3.3p L116
PDET_IN
TP3
RX_WCDMA_900_P
C138
C137
DNI
6.8n
RX_WCDMA_900_M
1
8
3
9
C197 C198
7
DNI 0.75p
VBAT
C174 C175
U102
2.2u 330p
11
PGND
10 1
VCC2 VCC1
9 2
RFOUT RFIN
8 3
ISO VBP
7 4
GND VMODE
6 5
1p
1p CPL VEN
C183
C180
R122
51
R124
R123
8dB
110 110
VBAT
C187 C188
2.2u 680p
U103
11
PGND
10 1
VCC2 VCC1
9 2
RFOUT RFIN
8 3 GND
ISO VBP
7 4
GND VMODE
6 5
CPL VEN
- 67 - Copyright © 01 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
TP2
C172
Close to pin1
330p
1950MHz
FL102
4 1
OUT IN
G3 G2 G1
5 3 2
PA_R0
PA_ON0 3.9n
C182
C184 C185
100p 100p
TP1
C186
680p
DNI
C121
FL104
33p
C194 4 1
OUT IN
G3 G2 G1
5 3 2
PA_R0
897.5MHz
22n
PA_ON1
C199
C200 C201
100p 100p
Only for training and service purposes
WCDMA_1900_2100_TX_OUT
3.3n
C181
WCDMA_850_900_TX_OUT