LG -E400f Service Manual page 58

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
R101
0.75p
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
4 3
G3 G4
C116
DNI
TP1
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
- 58 - Copyright © 01 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
R100
68n
FL1001
1
1842_5/1960MHz
4
GND5
2
L1006
GND1
3
3.3n
GND2
5
GND3
FL1002
1 IN
O1_1
O1_2
O2_1
L1012
GND O2_2
4
9.1n
10 5 3 2
Only for training and service purposes
8
1960MHz_1
9
1960MHz_2
6
1842_5MHz_1
7
1842_5MHz_2
10
GND4
9
8
7
6