Checking Ant. Sw Module Block - LG L601i Service Manual

4. TROUBLE SHOOTING

4.4 Checking Ant. SW Module Block

ANT101 ANT102
ANT100
56p
0
R643 C100
NA
C104
C101
NA
ANT_SEL0
ANT_SEL1
ANT_SEL2
Antenna Switch Block(Bottom)
3
OUT2
2
GND
SW100
1
G2
OUT1
ANT RF
G1
56p C102
KMS-507
UPG2010TB-E3
RF_OUT
ANT_SEL0
ANT_SEL1
ANT_SEL2
Schematic of the Antenna Switch Block
- 74 -
LMSP54MA-543
TP 1. VREG_RFRX_0_2.85V
VREG_RFRX_0_2.85V
U100
4
AC_T_N
VCONT
5
IN
6 R100
VDD
10K
C106
33p
FL508
LMSP54MA-543
11
GSM900_RX1
14
VC1 GSM900_RX2
15
VC2
16
VC3 GSM1800_RX1
GSM1800_RX2
13
VDD
GSM1900_RX1
1
GND1 GSM1900_RX2
2
GND2
4
GND3 GSM1800_1900TX
5
GND4 GSM900TX
8
GND5 UMTS2
10
GND6 UMTS1
12
GND7
17
GND8 PIN_DIREC1
18
GND9 PIN_DIREC2
L504
NA
19
20
21
22
23
24
3
6
7
9
25
26