LG KU950 - Page 89

4. TROUBLE SHOOTING
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ANT101
2.7nH
L101
C106
33p
C107
33p
L103
100nH
ANT
G1
G2
RF
KMS-507
SW100
9
UMTS1
UMTS2
7
VC1
14
15
VC2
VC3
16
VDD
13
5
GND4
8
GND5
10
GND6
GND7
12
GND8
17
18
GND9
GSM1800_1900TX
3
21
GSM1800_RX1
GSM1800_RX2
22
23
GSM1900_RX1
GSM1900_RX2
24
6
GSM900TX
19
GSM900_RX1
GSM900_RX2
20
25
PIN_DIREC1
PIN_DIREC2
26
FL100
LMSP54MA-543
ANT
11
1
GND1
2
GND2
GND3
4
C101
1p
C109
0.01u
VREG_RFRX_1_2.85V
C105
33p
L111 10nH
0
R199
C102
33p
L102
NA
ANT100
R101
NA
OUT100
ANT_SEL0
ANT_SEL1
ANT_SEL2
Near to Tx Path
1920-1980 MHz
SAW FILTER(SFSY0023001)
HDET
10u
C164
100p
+VPWR
C160
100p
C167
NA
C173
VREG_RFTX_2.85V
3.3nH
C154
+VPWR
4
50OHM
COUP
32
IN
1
OUT
U105
L125
33p
C168
0.01u
C174
100p
0.5p
C155
VREG_RFTX_2.85V
NA
C166
U106ADL5500
COMMRFIN
VOPS VRMS
R126
6.2K
R129
68
C170
33p
C161
15p
C153
0.01u
L122
NA
1200p
C175
12
GND4
14
GND5
16
NC
17
PGND
RF_IN
3
11
RF_OUT
VBIAS
6
15
VCC1A
7
VCC1B
13
VCC2A
9
VCC2B
2
VENABLE
VMODE
1
VREF
5
SKY77420
U103
4
GND1 GND2
8 10
GND3
EFCH1950TDC1
G1
2
G2
5
G3
3
IN
14
OUT
FL101
SAYZY1G95EA0B00FL103
ANT
2
1
GND1
4
GND2
GND3
8
GND4
9
6
GND5
GND6
3
RX
5
7
TX
C169
NA
R130
51
0.01u
C152
PA_R0
PA_ON
HDET1
TP1
TP2
TP3
TP4