Lge Internal Use Only - LG -E400 Service Manual

C109
100p
GND
7
VBATT
18
GPCTRL2
17
GPCTRL1
19
GPCTRL0
20
TX_EN
21
VRAMP
22
PGND1
23
PGND2
24
GND2
8
GSM850(824-849MHz)
GSM900(880-915MHz)

LGE Internal Use Only

TP1
SW100
2
ANT COMMON
1
3 4
G3 G4
C116
DNI
TRX2
13
TRX1
12
RX2
11
RX1
10
GND7
U101
16
GND4
6
GND3
9
GND8
2
GND1
1
C1091 C1092
56p 22p
R116
75
11dB
R113
47
7dB
Schematic of GSM/DCS/PCS Rx Block
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
WCDMA_900_RTX
WCDMA_2100_RTX
FL1002
1 IN
O1_1
O1_2
O2_1
L1012
GND O2_2
4
9.1n
2 3 5 10
- 79 - Copyright © 01 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
0.75p C1013
PCS(1930-1990 MHz)
L1014 DNI
9
8
7
C1036
6
5.6n
L1010
0.75p
DNI
L1011
C1040
5.6n
L1008
L1007
DNI
15n
9
8
7
6
L1003 L1005
DNI 18n
Only for training and service purposes
RX_PCS_P
RX_PCS_M
RX_DCS_P
DCS(1805-1880 MHz)
RX_DCS_M
RX_GSM_900_P
GSM(925-960 MHz)
RX_GSM_900_M
RX_GSM_850_P
GSM(869-894 MHz)
RX_GSM_850_M