LG L601i Service Manual page 85

4. TROUBLE SHOOTING
4.6.2 Checking Ant. SW Module
Refer to chapter 3.4
4.6.3 Checking RF Tx level
TP1
TP2
ANT100
0
R643
NA
C104
C101
NA
VREG_RFRX_0_2.85V
Test Point (RF Tx Level)
TP1
ANT101 ANT102
3
OUT2
2
GND
56p SW100
1
G2
OUT1
ANT RF
C100 G1
56p C102
KMS-507 UPG2010TB-E3
RF_OUT
ANT_SEL0
ANT_SEL1
ANT_SEL2
L114 15nH
TP2
C122
33p
Schematic of RF Tx Level
- 86 -
VREG_RFRX_0_2.85V
U100
4
VCONT AC_T_N
5
IN
6 R100
VDD
10K
L504
C106
NA
33p
FL508
LMSP54MA-543 11
19
GSM900_RX1
14 20
VC1 GSM900_RX2
15
VC2
16 21
VC3 GSM1800_RX1
22
GSM1800_RX2
13
VDD
23
GSM1900_RX1
1 24
GND1 GSM1900_RX2
2
GND2
4 3
GND3 GSM1800_1900TX
5 6
GND4 GSM900TX
8 7
GND5 UMTS2
10 9
GND6 UMTS1
12
GND7
17 25
GND8 PIN_DIREC1
18 26
GND9 PIN_DIREC2
TP3
C117 C118
33p 33p C125
0.01u
TP3
C120
22u