Checking Ant. Sw Module Block - LG L602i Service Manual

4.4. Checking Ant. SW Module Block

ANT_SEL0
ANT_SEL1
ANT_SEL2
ANT100 ANT101
C1007
1.2nH
L1010
C1009
1p
NA
VREG_RFRX_0_2.85V
C1018
33p
Antenna Switch Block(Bottom)
C1001
U1000
56p
3 4
OUT2 VCONT
C1003
2 5
GND IN
1 6
OUT1 VDD
R1001
UPG2010TB-E3 10K
C1005
56p
RF_OUT VREG_RFRX_0_2.85V
L1015
15nH
C1019
0.1u
Schematic of the Antenna Switch Block
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4. TROUBLE SHOOTING
TP 1. VREG_RFRX_0_2.85V
LMSP54MA-543
AC_T_N
SW1000
56p
G2
ANT RF
G1
LMSP54MA-543
KMS-507
14
C1004
1000p 15
16
13
1
2
4
5
R1004 0
8
ANT_SEL0
R1005 0 10
ANT_SEL1
R1006 0 12
ANT_SEL2
17
18
15nH
C1002
12p
FL1000
19
GSM900_RX1
20
VC1 GSM900_RX2
VC2
21
VC3 GSM1800_RX1
22
GSM1800_RX2
VDD
23
GSM1900_RX1
24
GND1 GSM1900_RX2
GND2
3
GND3 GSM1800_1900TX
6
GND4 GSM900TX
7
GND5 UMTS2
9
GND6 UMTS1
GND7
25
GND8 PIN_DIREC1
26
GND9 PIN_DIREC2