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LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.4.4 Checking RF Rx Level
4. TROUBLE SHOOTING
- 76 -
C88
56p
0.1u
C86
L90
6.8p
56p
C80
0.5p
C98
R102
1K
C87
33p
R100
1K
15nH
L106
C92
NA
SW100
ANT
G1
G2
RF
KMS-507
ANT100
1K
R103
R101
1K
C82
6.8nH
15nH
L103
L112
1.5nH
14
13
VC2
VC3
12
11
VC4
VDD
10
26
GND8
27
28
GND9
1
GSM1800RX1
GSM1800RX2
2
22
GSM1800_1900TX
3
GSM1900RX1
GSM1900RX2
4
GSM850RX1
7
8
GSM850RX2
GSM850_900TX
25
5
GSM900RX1
GSM900RX2
6
NC
17
UMTS1
15
16
UMTS2
VC1
U100
LMSP4LMA-573TEMP
ANT
19
9
GND1
GND2
18
GND3
20
GND4
21
23
GND5
24
GND6
GND7
1.8nH
L109
56p
L111
WCDMA_1900
WCDMA_850
ANT_SEL2
ANT_SEL3
ANT_SEL0
ANT_SEL1
VREG_RF_2.85V
WCDMA
0.5p
C159
C156
39p
C150
56p
ANT
G1
G2
G3
G4
G5
G6
G7
RX
TX
ACMD-7402-TR1G
FL101
C135
33p
15nH
L129
ANT
GND1
GND2
GND3
GND4
GND5
GND6
RX
TX
FL104
LM56C
82p
C142
5.6nH
L125
C146
0.5p
WCDMA_850
RX_WCDMA_850
RX_WCDMA_1900
WCDMA_1900
(1%)
(1%)
L137
15nH
0.1u
C179
NA
C171
C197
100p
1.2nH
L133
100p
C176
4p
C167
C163
33p
C190
10p
C189
1.8p
31
VDDA8
VDDA9
36
VDDM1
22
25
VDDM2
R_BIAS_UMTS
13
23
SSBI
45
TCXO
47
UMTS_CP_OUT
1
VDDA1
39
VDDA10
VDDA11
40
VDDA12
42
VDDA13
46
48
VDDA14
VDDA2
3
8
VDDA3
11
VDDA4
VDDA5
16
VDDA6
21
26
VDDA7
HB_INP
7
HB_LNA_IN
15
9
HB_LNA_OUT
4
LB_INM
LB_INP
5
14
LB_LNA_IN
10
LB_LNA_OUT
NC1
12
43
NC2
NC3
44
RX_IM
20
RX_IP
19
18
RX_QM
RX_QP
17
R_BIAS
2
R_BIAS_GPS
33
RFR6275
34
BLANK
24
GND
GND_SLUG
49
41
GPS_CP_OUT
38
GPS_INM
GPS_INP
37
GPS_PLNA_IN
32
35
GPS_PLNA_OUT
30
GRX_IM
29
GRX_IP
28
GRX_QM
GRX_QP
27
6
HB_INM
U107
R137
51
L142
2.7nH
11.8K
R132
15nH
L134
4
FL106
B7847
2
G1
G2
5
IN
1
O1
3
O2
330
R135
L138
33nH
L136
NA
L144
3.6nH
G1
2
G2
5
IN
1
O1
3
O2
4
FL105
B7838
R131
1.5K
L139
1.2nH
L141
39nH
R133
5.62K
15nH
L135
L143
39nH
1.8p
C182
10p
C181
C178
82p
4p
C164
0.5p
C188
C187
NA
C183
82p
SSBDT_RFR
VREG_W
VREG_MSMP_2.6V
RX_WCDMA_850
RX_WCDMA_1900
TP1
TP2
TP3
Vbias’
Vbias
TP4
TP2’
TP3’
TP4’
Содержание CU405
Страница 1: ...Date May 2007 Issue 1 0 Service Manual Model CU405 Service Manual CU405 Internal Use Only ...
Страница 131: ...LGE Internal Use Only Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes 132 ...
Страница 143: ... 144 LGE Internal Use Only Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 151: ... 152 LGE Internal Use Only Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 153: ... 154 LGE Internal Use Only Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 175: ...Note ...
Страница 176: ...Note ...