Only For Training And Service Purposes - LG KU380 Service Manual

4. TROUBLE SHOOTING
4.6.3 Checking RF Rx Level
WCDMA
TP2
L123
1.8nH
FL102
4 1
PGND RX
3.9p
3 2
ANT TX
C154
ACMD-7602
L126
12nH
LGE Internal Use Only
L101
3.3nH
C101
L102
1.5p
15nH
NEAR TO PAM
+VPWR
C149 C151
4.7u 1u
AWT6277R
11
GND5
10
C155 VCC2
9
10p
GND4
8
RFOUT
7
GND3 VMODE
6
GND2
L127
C157
15nH
NA
20dB
U103
CP0402A1950DNTR
PWR_DET
R122
R123 R124
47
130 130
7dB
- 84 -
TP1
TP2
TP4
TP3
TP1
C100
SW100
56p
G2
ANT RF
G1
KMS-507
L103
100nH
U100
C148
NEAR TO PAM 8.2p
+VPWR
C152
O1
1u L122 L121
G2
NA
5.6nH
U104
1
VCC1
2
RFIN
3
GND1
4
PA_R0
5
VREF
NEAR TO PAM
C158 TR100
KRX102U
100p
PA_ON
VREG_TCXO_2.85V
C162
100p
Copyright © 2007 LG Electronics. Inc. All right reserved.
TP4
VDD_RX
C150
L120
100p
FL101 1nH
EFCH1950TDF1
4 5
G3
1
IN
G1
3 2
L124
C153
4.7nH
TP3 2.2p
5 4
1 G2 O2 FL103
IN
G1 O1 EFCH2140TDE1
2 3
L129
L130
4.7nH
10nH
L131 C166
2.2nH 10p
L132
2.7nH

Only for training and service purposes

C156
2.2p
L125
4.7nH
C160
2.2p