LG A395 - Page 28

3. TECHNICAL BRIEF
- 28 -
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Only for training and service purposes
LGE Internal Use Only
TX Module Mode Tx ENABLE GpCtrl1 GpCtrl0
O 0 0 0
RX 0 0 1 0
RX 1 0 1 1
GSM850/900 TX Mode 1 1 0
DCS1800/PCS1900 TX Mode 1 1 1
Figure 3.3.2 RF-module CIRCUIT DIAGRAM
C463
DNI
DNI
C464
C465
DNI
C410 22u
C461 100p
U400
12
18 19 20 21 22
13
6
14
2
15
5
16
4
17
3
11
1
10 9 8 723
GND_SLUG
VRAMP
TX_ENABLE
GPCTRL0 GPCTRL1
GND1
VBATT
GND2
RX1
RFIN_LB
NC2
GND3
ANTENNA
RFIN_HB
GND6
GND4
GND5
GND9
GND8
GND7 NC3
RX0
NC1
C408 0.1u
C409 22p
C451
DNI
DNI
C452
C462 100p
VBAT
220p
C407
R409
24K
10KR407
RF_TX_RAMP
LowBand_Tx
HighBand_Tx
RF_PA_EN
RF_ANT_SW1
RF_ANT_SW2
Changed (9/10)
Changed (7/27)
Changed (11/6)
(7/16) U400 : RF7180 -> RF7182
(50ohm)
(50ohm)
(10V, X5R)
(50V)
close to TXM
Shielding by GND
(7/3) DC Blocking