Circuit Diagram - LG CU920 Manual

7. CIRCUIT DIAGRAM

1 2 3
SW100
SW101
C100 56p
R100 0 G2
G2 ANT
ANT RF
G1
G1
C101
UFL-R-SMT10 L103 C102
NA KMS-512
NA
56nH
A FL100
LMSP4LMA-573TEMP
14
VC1 GSM1800RX1
13
VC2 GSM1800RX2
12
VC3 GSM1900RX1
11
VC4 GSM1900RX2
L109 15nH GSM900RX1
10
VREG_RF_SMPS VDD GSM900RX2
GSM850RX1
9
C112 C113 GND1 GSM850RX2
0.1uF 33p 18
GND2
20
GND3 UMTS1
21
GND4 UMTS2
23
GND5
24
GND6 GSM1800_1900TX
26
GND7 GSM850_900TX
27
B
GND8
28
GND9
R108 1K
ANT_SEL0
R109 1K
ANT_SEL1
R111 1K
ANT_SEL2
R112 1K
ANT_SEL3
C
ANTENNA SWITCH MODULE LOGIC
LMSP4LMA-573TEMP_Rev B Later
ANT_SEL0 ANT_SEL1 ANT_SEL2 ANT_SEL3
GSM900/GSM850 TX HIGH HIGH LOW LOW
DCS/PCS TX HIGH LOW LOW LOW
GSM 850 RX LOW LOW LOW LOW
GSM900 RX LOW LOW HIGH LOW
DCS RX LOW HIGH HIGH LOW
PCS RX LOW HIGH LOW LOW
UMTS 850 HIGH LOW HIGH LOW
D
UMTS 1900 HIGH
LOW HIGH HIGH
GSM/EDGE
E
WCDMA U102
C144 C145
33p
U103
WCDMA_850
ANT TX L128
C148
15nH
39p
RX RX_WCDMA_850
CP0402A0836BNTR
GND1 GND6
C150
GND2 GND5 NA
GND3 GND4
B7637
F
WCDMA_1900
FL102
U104
C154
CP0402A1880EL
8.2p
RX TX
ACMD-7402-TR1G C153
68p
C930
L904
100p
3.3nH
RX_WCDMA_1900
C R124
51
L903
4.7nH
L136
1.2nH
FL104
C929 C170
2 3
4p
100p
G1 O1
1
IN
C169 G2 O2
L905 100p 5 4
C172
R125
L139 6.8nH
2.2K 4p
22nH
D
VREG_W
L141
C173 C174
82p 0.1u
FL105
L142
C176 2 3
82p 2.7nH
1 G1 O1
IN
G2 O2
R126
5 4
2.2K
C180
L144
2.7p
1nH
E
F
1 2 3
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4 5 6 7
L101
NA
1
2
3
4
5
6 L107
7 2.7nH
8
15
16
L909
5.6nH
22
WCDMA_850
25
C115
56p
17
NC
L112
L113
NA
NA
WCDMA_1900
C931
C118
68p
100p
C119
1p
L119
18nH
C121
100p
GSM_PA_RAMP
R113 2.2K
L122
C128
NA
68p
C127
56p L124
L901
2.2nH
27nH C132
33p
L125
10nH
C928
33p
C140
0.5p
2
DCS_PCS_IN
16 7
DCS_PCS_OUT U101 GSM_IN
SKY77329
9 1
GSM_OUT TX_EN GSM_PA_EN
3
BS GSM_PA_BAND
C146
27p 7p
L127
10nH
C149 C147
68p 33u
HDET
C151
PA_ON1
1000p
C152
0.01u
AWT6321R U105
L908
1.5nH 15
PGND L130
14 1
6.8nH
GND4 VEN_CELL
13 2
RFOUT_CELL RFIN_CELL
12 3
VCC VMODE
C933 11 4
L131
NA VCCA VBATT PA_R0
10 5 NA
GND3 GND1
9 6
GND2 RFIN_PCS
8 7
RFOUT_PCS VEN_PCS
C165
PA_ON2 10p
L135
C168 NA
0.01u
L138
15nH
L140
15nH
14
RX_WCDMA_850 LB_LNA_IN
10
LB_LNA_OUT
1.2nH
5
LB_INP
4
LB_INM
L907 1.2nH
15
RX_WCDMA_1900 HB_LNA_IN
9
C177 L143 HB_LNA_OUT
1.5p 68nH
7
HB_INP
6
HB_INM
32
GPS_PLNA_IN
L145 35
C179 GPS_PLNA_OUT GPS_CP_OUT
68nH
1.5p
UMTS_CP_OUT
37
GPS_INP
38
U106
L906 1.2nH GPS_INM
R128 11.8K (1%) 2
R_BIAS
R129 5.62K (1%)
13
R_BIAS_UMTS
33
R_BIAS_GPS
R130 5.62K
23
SSBDT_RFR SSBI
34
BLANK
24
GND
49
GND_SLUG
22
VREG_MSMP_2.8V VDDM1
25
R131
C190 VDDM2
51
100p
RFR6275
4 5 6 7
8 9 10 11
L100
4.7nH
L102
NA
L104
4.7nH
C105 6p
WCDMA_1900_TX_OUT
DCS_PCS_TX
C106 6p
C107 4p
L106
GSM_TX
3.3nH
WCDMA_850_TX_OUT
L108 C109 12p
18nH
L110 TX_ON
3.3nH
TX_AGC_ADJ
DAC_REF
C117
12p
(1%)
L111
27nH R103 12K
L114
68nH R104 680
SSBDT_RTR
(1%)
L116
27nH
L118
22nH
L120
47nH
L121
22nH
+VPWR
C129
33u
R115
82
DCS_PCS_TX
R116
R117
82 82
VREG_MSMP_2.8V
FL101
LMSM32AA-533
R119
51
5 1
RFOUT RFIN GSM_TX
7.75dB
7
VC R120 R121
110 110
R122
200
GSM_SAW_SW_MODE
EGSM LOW
C143
NA GSM850 HIGH
remain LOW when not transmitting
+VPWR
L132
3.3nH
WCDMA_850_TX_OUT
DGLP36M01 FL103
9 I1_CELL O1_CELL 1
C159
NA
8
G6
7
G5
6 4
I2_PCS O2_PCS
L134
3.9nH
10 5 3 2
WCDMA_1900_TX_OUT
C167
NA
VREG_W
17
RX_QP RX_QP
18
RX_QM RX_QM
19
RX_IP RX_IP
20
RX_IM RX_IM
27
GRX_QP
28
GRX_QM
29
GRX_IP
30
GRX_IM
R127
45 10K
TCXO RFR6275_TCXO
C181 C178
41 150p
2.2n
47
12
NC1 L146
43
NC2 47nH
44
NC3 VREG_RF_SMPS
1
VDDA1
3
VDDA2 C183
8
VDDA3 C184 C185 C186 C187 2.2u
11
VDDA4 0.068u 30p 30p 0.1u
16
VDDA5
21
VDDA6
26
VDDA7
31
VDDA8
36
VDDA9
39
VDDA10 C188 C189
40
VDDA11 22p 120p
42
VDDA12
46
VDDA13
48 R132 10
VDDA14 C191 C192
22p 22p
C193
33p
8 9
- 171 -
12 13 14 15
TX_IP
C103
180p
C104
180p
55 2
ENV_OUT ENV_LNP TX_IM
1
ENV_LNN
46
HB_RF_OUT1 TX_QP
44 51
HB_RF_OUT2 TX_IP C108
50
180p
TX_IN
43 53
LB_RF_OUT1 TX_QP
42 52
LB_RF_OUT2 TX_QN C110
180p
24 7
RF_ON TCXO RTR6275_TCXO TX_QM
C111 3300p
56 5
VCONTROL VTUNE1
C114 1000p
18
VTUNE2
54
DAC_REF
VTUNE-Connected directly to GND
12
U100 RX_IP RX_IP
14 13 R102 56
SBDT RX_IN RX_IM
RTR6275 R105
3 10
110
R_BIAS1 RX_QP RX_QP
27 11
R_BIAS2 RX_QN RX_QM
40
PWD_DET_IN
31 21
GCELL_INP TEST
30
GCELL_INN
4 R107 5.1 L117
VDDA1
32 6 47nH
EGSM_INP VDDA2
33 8
EGSM_INN VDDA3
9 R110 2.7 C120
VDDA4
38 15 2.2u
DCS_INP VDDA5
39 16
DCS_INN VDDA6
19
VDDA7
36 20
GPCS_INP VDDA8
37 28
GPCS_INN VDDA9
41
VDDA10 L123
22 45
47nH
CAL_INP VDDA11
23 47
CAL_INN VDDA12
48
VDDA13 C130
26 49
WLNA_IN VDDA14 0.1u
R114 10
VREG_RF_SMPS
C133
2.2u
R118
100ohm
C142
C141
0.01u 22p
TCXO
VREG_TCXO_2.85V TG-5010LH_19_2M_75A
OUT GND
3 2 R123
100ohm
C156 VCC VCONT TRK_LO_ADJ
4 1
0.1uF
C157 X100 19.2MHz
33p
C158
0.01u
C160 100p
TCXO_PM
C161 1000p
RTR6275_TCXO
C164 1000p
RFR6275_TCXO
C166 100p
RBR1000_TCXO TCXO_BT
(PPS)
LGE Internal Use Only
16
A
HDET
R106
110 B
VREG_RF_SMPS
C
VREG_SYNTH_2.6V
D
E
F
C
D
E