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

LGE Internal Use Only

SW100
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
TP2
39p
R116
GSM_TX
75
GSM850(824-849MHz)
11dB
GSM900(880-915MHz)
TP3
R113
DCS_PCS_TX
47
DCS(1710-1785 MHz)
7dB
PCS(1850-1910 MHz)
Schematic of GSM/DCS/PCS Tx Block
2
COMMON
3 4
G3 G4
C116
DNI
TP1
WCDMA_900_RTX
TRX2
13
TRX1
WCDMA_2100_RTX
12
RX2
11
RX1
10
GND7
U101
16
GND4
6
GND3
9
GND8
2
GND1
1
C1091 C1092
56p 22p
- 76 - Copyright © 01 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
R100
68n
Murata
EAM62492501
FL1001
1 IN
O1_1
O1_2
O2_1
L1006
C_C5 O2_2
4
3.3n
2 3 5 10
FL1002
1 IN
O1_1
O1_2
O2_1
L1012
GND O2_2
4
9.1n
2 3 5 10
Only for training and service purposes
9
8
7
6
9
8
7
6