Lge Internal Use Only - LG -E400 Service Manual

ANT100
ANT105
C118
1
2mm
VBAT
ANT_SEL2
C1043 ANT_SEL1
C1044
22u
ANT_SEL0
47p
ANT_SEL3
R107
GSM_PA_RAMP
2.2K
FL1008
6
ANT
WCDMA_2100_RTX
L1035 L1031
1.5n DNI 2
GND1
4
GND2
5
GND3
1950MHz,2140MHz
Band I
TP2
FL2
6
ANT RX1
WCDMA_900_RTX
RX2
C1081
L1021
TX
DNI 12n
2
GND1
4
GND2 GND5
5
GND3 GND4
Band VIII

LGE Internal Use Only

L102 C109
100p
ANT
1
100p 100p
GND
7
VBATT
18
GPCTRL2
17
GPCTRL1
19
GPCTRL0
20
TX_EN
21
VRAMP
22
PGND1
23
PGND2
24
GND2
8
C1024
39p
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)
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
C137 C138
DNI
6.8n
RX_WCDMA_900_M
1
8
3
9
C197 C198
7
DNI 0.75p
SW100
2
COMMON
3 4
G3 G4
C116
DNI
TP1
TRX2
13
TRX1
12
RX2
11
RX1
10
GND7
U101
16
GND4
6
GND3
9
GND8
2
GND1
1
C1091 C1092
56p 22p
VBAT
C174 C175
U102
2.2u 330p
11
PGND
10
VCC2 VCC1
9
RFOUT RFIN
8
ISO VBP
7
GND VMODE
1p 6
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
GND
8 3
ISO VBP
7 4
GND VMODE
6 5
CPL VEN
- 70 - Copyright © 01 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
R100
68n
Murata
EAM62492501
FL1001
1 IN
L1006
C_C5
4
3.3n
2 3 5
WCDMA_900_RTX
WCDMA_2100_RTX
FL1002
1 IN
L1012
GND
4
9.1n
2 3
C172
Close to pin1
330p
1950MHz
FL102
1
2 4 1
OUT IN
3 G3 G2 G1
4 5 3 2
PA_R0
5
3.9n
PA_ON0
C182
C184 C185
100p 100p
C186
680p
DNI
C121
FL104
C194 33p
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
9
O1_1
8
O1_2
7
O2_1
O2_2
6
10
9
O1_1
8
O1_2
7
O2_1
O2_2
6
5 10
WCDMA_1900_2100_TX_OUT
3.3n
C181
WCDMA_850_900_TX_OUT