LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 71 -
4.4.4 Checking RF Rx Level
C12
33p
1.5p
1K
R112
C3
0.1uF
C11
17
NC
15
UMTS1
UMTS2
16
14
VC1
VC2
13
12
VC3
VC4
11
10
VDD
21
GND4
GND5
23
GND6
24
26
GND7
27
GND8
GND9
28
GSM1800RX1
1
2
GSM1800RX2
GSM1800_1900TX
22
GSM1900RX1
3
4
GSM1900RX2
7
GSM850RX1
GSM850RX2
8
25
GSM850_900TX
GSM900RX1
5
6
GSM900RX2
LMSP4LMA-573TEMP
U101
19
ANT
GND1
9
18
GND2
20
GND3
ANT103
L108
15nH
56p
C1
R115
1K
4.7nH
L103
1.8nH
L704
1K
R113
KMS-512
ANT
G1
G2
RF
SW101
C822
1p
ANT101
ANT102
R102
5.6nH
56p
C18
0
R101
L707
NA
C15
56p
R116
1K
C16
NA
WCDMA_1900
WCDMA_850
VREG_RF_2.85V
ANT_SEL2
ANT_SEL0
ANT_SEL1
ANT_SEL3
WCDMA
L130
15nH
G2
G3
G4
G5
G6
G7
RX
TX
FL102
ACMD-7402-TR1G
ANT
G1
C71
39p
RX
TX
B7637
FL104
ANT
GND1
GND2
GND3
GND4
GND5
GND6
C61
3.9p
NA
C75
10p
C52
L127
3.3nH
C823
1p
56p
C68
RX_WCDMA_1900
RX_WCDMA_850
WCDMA_850
WCDMA_1900
(1%)
(PPS)
(1%)
1.6K
1.6K
2.2u
C108
30p
C105
10
R143
C104
0.1u
C88
150p
2.2u
C107
C87
2.2n
10K
R136
120p
C114
C103
47nH
L145
30p
22p
C115
0603
3
8
VDDA3
11
VDDA4
VDDA5
16
VDDA6
21
26
VDDA7
31
VDDA8
VDDA9
36
VDDM1
22
25
VDDM2
20
RX_IP
19
18
RX_QM
RX_QP
17
R_BIAS
2
R_BIAS_GPS
33
R_BIAS_UMTS
13
23
SSBI
45
TCXO
47
UMTS_CP_OUT
1
VDDA1
39
VDDA10
40
VDDA11
VDDA12
42
VDDA13
46
48
VDDA14
VDDA2
GPS_PLNA_OUT
30
GRX_IM
29
GRX_IP
GRX_QM
28
GRX_QP
27
6
HB_INM
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
44
NC3
RX_IM
RFR6275
U110
34
BLANK
24
GND
GND_SLUG
49
41
GPS_CP_OUT
38
GPS_INM
GPS_INP
37
GPS_PLNA_IN
32
35
22p
C113
L144
47nH
G1
2
G2
5
IN
1
O1
3
O2
4
FL105
B7838
1.2nH
1.2nH
L137
L143
C112
120p
2.7
R141
30p
C101
0.1u
C102
30p
C93
L141
33nH
68nH
L149
R139
5.62K
C81
33p
L139
15nH
L706
R142
51
1.8nH
C85
4p
C109
C99
NA
NA
R137
1.5K
0.5p
2
G1
G2
5
IN
1
O1
3
O2
4
C110
FL106
B7847
C96
100p
22p
C116
82p
C92
L142
15nH
L140
15nH
L146
68nH
R140
330
11.8K
R138
4.7nH
C94
L147
L705
0.01u
C82
1.8nH
4p
NA
C100
C89
1nH
10p
L148
100p
C117
VREG_W
VREG_RF_SMPS
RX_IM
RX_IP
RX_QM
RX_QP
VREG_MSMP_2.8V
VREG_W
RFR6275_TCXO
RX_WCDMA_1900
RX_WCDMA_850
SSBDT_RFR
TP1
TP2
TP3
Vbias’
Vbias
TP4
TP2’
TP3’
TP4’
Содержание CU575
Страница 1: ...Date Mugust 2007 Issue 1 0 Service Manual Model CU575 Service Manual CU575 ...
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Страница 137: ... 138 LGE Internal Use Only Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 141: ...LGE Internal Use Only Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes 142 ...
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Страница 178: ...LGE Internal Use Only Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes Note ...
Страница 179: ...Note LGE Internal Use Only Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes ...