LG KF700 Service Manual page 116

WCDMA 2100
L116
6.8nH
C172
RX_WCDMA_2100
56p
L121
1.8nH
TP3
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
L113
C150
NA
100p
TP2
FL103
SAYZY1G95EA0B00
+VPWR
C160
4.7u
smd_1608h_9_r
C170
22p
U104
C171
SCDY0003801
L120
2.2p
1.8nH
1 2
L122
C173
4.7nH
DNI
20dB
R116
PWR_DET
R117
47 47
R118 R119
8 dB
120 100ohm
Check Vbias over 2V?
Check TP2
Signal exist?
Check TP3
Signal exist?
Check TP4
Signal exist?
4. TROUBLE SHOOTING
Vbias
VDD_RX
C149
22p L112
1nH
WLNA_OUT
C154
0.5p
C162 C164
C163
0.01u
0.01u 4.7u
smd_1608h_9_r
U105
AWT6279R
11
PGND
10 1
VCC VBATT
9 2
GND3 RFIN
8 3
RFOUT VMODE2
7 4
GND2 VMODE1
6 5
GND1 VEN
C174
DNI
C175 C176
0.01u
100p
Check the RF S/W
Check FEM
FL100
Check the Duplexer
FL103
Check the RTR6275
U100
- 117 -
FL102
EFCH2140TDE1
L114
WCDMA_MIX_IN_M
1.2nH
2 3
C152
C151
G1 O1
IN 0.5p
1
G2 O2
1p
5 4
L115
WCDMA_MIX_IN_P
1.2nH
TP4
FL104
L118
EFCH1950TDF1
1nH
4 5
C161 56p
O1 G3
1
C539 WCDMA_2100_TX_OUT
C165 IN
G2 G1
DNI 1p
3 2
L119
3.9nH
PA_R1
PA_ON
LGE Internal Use Only