LG KU950 - Checking Rf Tx Level

4. TROUBLE SHOOTING
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4.6.2 Checking Ant. SW Module
Refer to chapter 3.4
4.6.3 Checking RF Tx level
Test Point (RF Tx Level)
Schematic of RF Tx Level
2012
Near to G-PAM
18nH
C148
C121
0.01u
ANT101
2.7nH
33u
C117
L101
C106
33p
C107
33p
L103
100nH
33p
R121
ANT
G1
G2
RF
KMS-507
SW100
C123
0.01u
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
+VPWR
0.01u
C122
VREG_RFRX_1_2.85V
33p
R113
C105
33p
5.6nH
C135
L111 10nH
0
R199
C102
33p
L102
NA
ANT100
R101
NA
GSM_OUT
PGND
21
RSVD_GND
19
20
VAPC
VBATT
17
VCC1A
2
VCC1B
6
1
BS
DCS_PCS_IN
3
DCS_PCS_OUT
15
18
ENABLE
5
GND1
7
GND2 GND3
8
GND4
9
GND5
10 12
GND6 GND7
13
GND8
14 16
GND9
4
GSM_IN
11
U101
SKY77328
OUT100
ANT_SEL0
ANT_SEL1
ANT_SEL2
TP1
TP3
TP2