LG KU950 Service Manual page 89

4. TROUBLE SHOOTING
ANT100
R101
NA
R199
0
C101
ANT_SEL0
ANT_SEL1
ANT_SEL2
VREG_RFRX_1_2.85V
TP3
TP2
1920-1980 MHz
Near to Tx Path
U105
R129
IN COUP
2 3
68
OUT 50OHM
1 4
C170
33p
R130
51
L122
NA
C173
NA
L125
33p VREG_RFTX_2.85V
FL103 SAYZY1G95EA0B00
2 5
ANT RX
7
TX
1 3
GND1 GND6
4 6
GND2 GND5
8 9
GND3 GND4
OUT100
L101 KMS-507
SW100
G2
ANT RF
G1
2.7nH
1p
L102
NA
C105 C106
33p 33p
L111 10nH
PGND
17
RF_OUT
11
VCC2B
9
VCC2A
13
HDET
RFIN COMM
VOPS VRMS
ADL5500 U106
C174
100p
ANT101
33p
C102
L103
100nH
FL100
LMSP54MA-543
14
VC1
15
VC2
16
VC3
13
C107
VDD
33p
1
GND1
2
GND2
4
GND3
5
GND4
8
GND5
10
GND6
12
C109 GND7
17
0.01u
GND8
18
GND9
TP4
C152
0.01u
C153
0.01u
VREF
5
RF_IN
3
VENABLE
2
R126
VMODE
1
6.2K
C160 C161
SKY77420
100p 15p
U103
C166
C167 C168 C169
100p 0.01u NA
NA
HDET1
C175
1200p
- 90 -
TP1
19
GSM900_RX1
20
GSM900_RX2
21
GSM1800_RX1
22
GSM1800_RX2
23
GSM1900_RX1
24
GSM1900_RX2
3
GSM1800_1900TX
6
GSM900TX
7
UMTS2
9
UMTS1
25
PIN_DIREC1
26
PIN_DIREC2
+VPWR
VREG_RFTX_2.85V
SAW FILTER(SFSY0023001)
FL101
EFCH1950TDC1
3
C154
G3
4 1
OUT IN
G2 G1
3.3nH
5 2
PA_ON
PA_R0
+VPWR
C164
10u
C155
0.5p