LG -E400f Service Manual page 61

SW100
L102 C109
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
R116
75
GSM850(824-849MHz)
11dB
GSM900(880-915MHz)
R113
47
DCS(1710-1785 MHz)
7dB
PCS(1850-1910 MHz)
LGE Internal Use Only
TP1
2
COMMON
4 3
G3 G4
C116 R100
DNI 68n
WCDMA_850_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
Schematic of GSM/DCS/PCS Rx Block
FL1001
1 8
1842_5/1960MHz 1960MHz_1
9
1960MHz_2
4 6
GND5 1842_5MHz_1
2 7
L1006
GND1 1842_5MHz_2
3
3.3n
GND2
5 10
GND3 GND4
FL1002
1 IN 9
O1_1
8
O1_2
7
O2_1
L1012
GND O2_2
4 6
9.1n
10 5 3 2
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4. TROUBLE SHOOTING
TP2
L1014
C1013
PCS(1930-1990 MHz)
1p
DNI
C1036
5.6n
L1010
L1011
DCS(1805-1880 MHz)
DNI
0.75p
C1040
5.6n
RX_GSM_900_P
L1008
L1007
DNI
15n
GSM(925-960 MHz)
RX_GSM_900_M
RX_GSM_850_P
L1003 L1005
GSM(869-894 MHz)
DNI 18n
RX_GSM_850_M
Only for training and service purposes
RX_PCS_P
RX_PCS_M
RX_DCS_P
RX_DCS_M