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4. TROUBLE SHOOTING
4.6.3 Checking Rx Level
SW100
G2
ANT
G1
UFL-R-SMT10
WCDMA_2100
WLNA_OUT
LGE Internal Use Only
SW101
R100
0
G2
ANT
G1
C101
C104
DNI
DNI
KMS-512
TP2
C146
FL102
ACMD-7602
4
1
6.8nH
PGND
RX
3
2
ANT
TX
C153
15p
TP5
C160
5
4
EFCH2140TDE1
1
G2
O2
IN
FL104
G1
O1
18p
2
3
3.3nH
C162
WCDMA_2100_TX_OUT
DCS_PCS_TX
GSM_TX
TX_ON
TX_AGC_ADJ
DAC_REF
C115
12p
SSBDT_RTR
TP4
RX_WCDMA_2100
VREG_RF_SMPS
C131
10u
WLNA_OUT
WCDMA_MIX_IN_P
[Fig 4.6.3.2] Schematic of the WCDMA RX Block
- 92 -
TP1
RF
C102
56nH
TP3
R122
RX_WCDMA_2100
3.3p
C151
2.7nH
LDC151G9520Q-359
U103
L120
0
C155
C156
DNI
1.2p
HDET
R124
51
L124
L123
1nH
1nH
L125
L126
1nH
1nH
55
OPEN
C106
6p
46
HB_RF_OUT1
44
HB_RF_OUT2
C107
6p
C108
4p
43
LB_RF_OUT1
42
LB_RF_OUT2
24
RF_ON
56
VCONTROL
VTUNE1
VTUNE2
54
DAC_REF
U100
14
SBDT
(1%)
RTR6275
R102
12K
3
R_BIAS1
27
R_BIAS2
R103
680
(1%)
PWD_DET_IN
31
GCELL_INP
30
GCELL_INN
32
EGSM_INP
33
EGSM_INN
38
DCS_INP
39
DCS_INN
36
GPCS_INP
37
GPCS_INN
VDDA10
22
GND1
VDDA11
23
GND2
VDDA12
VDDA13
26
WLNA_IN
VDDA14
L119
1nH
Copyright © 2008 LG Electronics. Inc. All right reserved.
C100 56p
FL100
LMSP4LMA-573TEMP
14
GND1
6
GND2
7
RFOUT
8
GND3
9
VCC
10
PGND
11
AWT6279R
WCDMA_MIX_IN_M
WCDMA_MIX_IN_P
2
GND5
1
GND4
51
TX_IP
50
TX_IN
53
TX_QP
52
TX_QN
7
TCXO
5
18
12
RX_IP
13
RX_IN
10
RX_QP
11
RX_QN
40
21
TEST
4
VDDA1
6
VDDA2
8
VDDA3
9
VDDA4
15
VDDA5
16
VDDA6
19
VDDA7
20
VDDA8
28
VDDA9
41
45
47
48
49
Only for training and service purposes
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Table of Contents
Troubleshooting
