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TP2
TP3
C167
C168
RX_WCDMA_2100
56p
56p
L125
1.2nH
PQ
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Only for training and service purposes
VDD_RX
WLNA_OUT
C152
3.9p
2.2nH
L121
+VPWR
FL103
SAYZY1G95EB0B00
U104
SCDY0003403
C169
5.6p
20dB
R124
51
Check Vbias over 2V?
Check TP2
Signal exist?
Check TP3
Signal exist?
Check TP4
Signal exist?
4. TROUBLE SHOOTING
Vbias
C149
EFCH2140TDE1
22p
FL102
L114
1.5nH
C153
C154
56p
56p
L117
1.8nH
PQ
TP4
C160
C162
C163
22u
0.01u
100p
U105
11
GND5
10
VCC2
VCC1
9
C170
GND4
RFIN
8
RFOUT
GND1
7
1.8p
GND3
VMODE
4.7nH
6
GND2
VREF
L128
L126
8.2nH
AWT6277R
R123
PWR_DET
68
R125
R126
100
100
8 dB
Check the RF S/W
Check FEM
FL100
Check the Duplexer
FL103
Check the RTR6275
U100
- 105 -
L115
L116
WCDMA_MIX_IN_M
1nH
1nH
2
3
C155
G1
O1
0.5p
IN
1
G2
O2
5
4
L118
L119
WCDMA_MIX_IN_P
1nH
1nH
FL104
EFCH1950TDF1
C159
8.2p
4
5
C164
O1
G3
1
1u
IN
G2
G1
L123
L124
3
2
15nH
C165
3.3nH
1
2
3
4
PA_R1
5
Q100
VREG_TCXO_2.85V
C173
PA_ON
100p
KRX102E
LGE Internal Use Only
C161
56p
NA
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Table of Contents
Troubleshooting
