Circuit Diagram - LG U310 Service Manual

7. CIRCUIT DIAGRAM

1 2 3
ANT1001 ANT1002
A
SW1000
R1038
G2
ANT RF
G1
0
KMS-512
L1007 C1003
B 10nH NA C1005
33p
FL1000
DGM092M03
9 12
PCN_PCS_TX EGSM_RX1
13
EGSM_RX2
11 14
GSM850_EGSM_TX PCN_RX1
15
PCN_RX2
21 16
WCDMA2100 PCS_RX1
17
PCS_RX2
4 18
ANT_SEL0
CTRL1 GSM850_RX1
5 19
ANT_SEL1
CTRL2 GSM850_RX2
6 7
ANT_SEL2
CTRL3 VDD
C C1015
10p
C1018 C1019 C1020
33p 33p 33p
C1025 33p C1026 33p
D
L1022
10nH
C1041 100p
C1042 33p
C1049
NA
E
+VPWR
C1062
C1061 1000p
4.7u
WS2512_TR1G U1002
F
10 1
VCC2 VCC1
9 2
GND4 RFIN
8 3
RFOUT GND1
7 4
GND3 VCONT
C1070
6
1p
GND2
11 5
BGND VREF
L1023
4.7nH
C1074
NA
C
U1004
0 C1079
1 4
OUT 50OHM
C1082 R1028 100p
33p
2 3
IN COUP
L1028 CP0402A1880EL
D
56nH
FL1003 LP69A
ANT TX
RX
GND1 GND6
GND2 GND5
GND3 GND4
L1029
C1093 L1030
100nH
2.7nH
100p
E L1300 C1095
4.7nH
0.5p
F
1 2
LG(42)-A-5505-10:01
4 5
1P7T SWITCH ANT_SEL0 ANT_SEL1 ANT_SEL2
GSM_PA_BAND MODE
GSM 900 TX H L H
LOW GSM
GSM 1800/1900 TX
L H H
DCS/PCS GSM900
HIGH
GSM1800 RX L H L
DCS1800/PCS1900
GSM1900 RX H L L
OFF
GSM 900 RX
H H L
UMTS RX/TX L L H
L1011
VREG_RFRX_0_2.85V
7.5nH
+VPWR
C1016 C1013
33u
0.01u
C1024
0.01u
C1027 C1023
R1008
C1028 0.01u 22u
24
68p
R1012
200
R1013
150
15 3
DCS_PCS_OUT DCS_PCS_IN
11 4
EGSM_OUT U1001 EGSM_IN
R1015
R1018
R1017 100ohm 51
19 18 150
RSVD_GND ENABLE GSM_PA_EN
SKY77318
C1044
21 1
P_GND BS 15p
SMPY0014001
R1020
R1022
24
200
R1024 100ohm
GSM_PA_BAND
C1058
15p
GSM/DCS/PCS
WCDMA
+VPWR
C1063
1000p
C1068
R1025
NA
6.2K
PA_R0
Q1000
UMC4N
C1071
15p
PA_ON
VREG_RFTX_2.85V
C1077 C1075
4.7u
0.1u
R1027
PA_ON
10K
U1003 LMV228TLX-NOPB
A1 A2
VREG_RFTX_2.85V
RFIN_EN VDD
B1 B2
HDET1
GND OUT
HDET C1084 C1085
27p 1200p
C1086 C1087
100000pF 10p
C1088
C1091 10p
100000pF
C1096 C1097 C1098 RX_IP
VREG_RFRX_1_2.85V RX_IM
680p 0.1u 100p
RX_QP
RX_QM
VREG_TCXO_RF_2.85V
C1104 C1105
C1103 0.1u 5.6p
10u
4 5 6 7
TX_VCO_EN_1_N TX_VCO_EN_0_N
LOW HIGH
HIGH LOW
HIGH HIGH
L1003 2.7nH
L1005 3.6nH
C1004 1000p
1930-1990 MHz
L1008 3.6nH
L1009 2.7nH
L1012 5.6nH
L1014 7.5nH
C1009 1000p 1805-1880 MHz
L1015 7.5nH VREG_RFTX_2.85V
C1012
L1017
33p
5.6nH
L1018 10nH
L1019 9.1nH
C1017 1000p R1006 11K
(1%)
L1020 9.1nH 925-960 MHz
L1021 10nH
C1035
C1033 R1009 C1034
22n
82
120p 1000p VREG_RFTX_2.85V C1038
(PPS)
0.1u C1030
(2012)
C1029 82p
R1014 C1039
47 10u 100p
X1000
MQW6V0C869M
FB1000
5 9
OUT1 VC VREG_RFTX_2.85V
1
OUT2
R1016 100ohm
10
SW1 GSM_TX_VCO_1_EN_N
3 8 R1019 100ohm
VB SW2 GSM_TX_VCO_0_EN_N
C1053
C1050 C1043
R1021
33p 10u 15p
VREG_MSMP_2.7V
51
C1052
C1051 C1054 C1055
0.1u 15p 0.1uF
SBCK
SBDT
SBST
FL1001
L1301 C1065
SAFEB1G95KA0F00
3.3nH 3
3p
G3
4 1
OUT IN
G2 G1
5 2
C1069
NA
C1076
1.2nH
L1024 FL1002
5.6nH
3 2
C1078
L1025 O1 G1 1
IN
NA O2 G2
C1080
3.3p
SAFEB2G14FA0F00 4 5
NA
L1026
5.6nH L1027
3.3nH
C1081
1.2nH
VREG_TCXO_RF_2.85V
C1089 C1090
100p 0.1u
13 49
PLNA_OUT PGND
14 48
ILNA_OUT GLNA_BIAS
15 47
PLNA_BIAS GLNA_IN
R1034
16 46
PLNA_IN R_BIAS
17 45
ILNA_BIAS VDDA8 11K
18 44 (1%)
ILNA_IN SBST SBST
19 43
RFR6250E SBDT SBDT
VDDRF3
20 42
SBCK SBCK
RX_IP U1005 R1035
21 41
VREG_MSMP_2.7V
RX_IM VDDM
22 40
GRX_IP 51
RX_QP
23 39
RX_QM GRX_IM
24 38
VDDA2 GRX_QP C1099 C1100
37
VREG_TCXO_RF_2.85V
GRX_QM 10p 1u
C1101 C1102
10p 0.1u
VREG_TCXO_RF_2.85V
C1106 C1107
100p 0.1u
C1108 R1036 C1110
C1109 3.9n
470p 3.3K 0.01u C1111
(PPS)
(1%) TCXO_OUT
(2012)
1000p
R1037
(1%)
4.7K
8 9
- 143 -
14 15 16
DAC_REF
L1000
TX_IM
2.2uH
C1000
L1001 47p
TX_IP
2.2uH
L1002
TX_QM
2.2uH
C1001
L1004
47p
TX_QP
2.2uH
R1004
VREG_RFTX_2.85V
10
C1006
0.1u
L1010
VREG_RFRX_0_2.85V
47nH
C1007 C1008
33p
0.1u
L1013
VREG_SYNTH_2.85V
47nH
C1010 C1011
0.1u 33p
L1016
VREG_RFTX_2.85V
47nH
C1014
0.1u
CP_HOLD2 RX_IN RX_IM
29 14
CP2 RX_IP RX_IP
30 13
VDDA9 RX_QN RX_QM
31 12
RX_VCO_IN RX_QP RX_QP
32 11
R_BIAS VDDA4
33 10
C1021
GSM1800_INN VCO_TUNE C1022
34 U1000 9 1uF 47p
GSM1800_INP VTUNE_REF R1007
35 8
VDDA10 VDDA3 10
36 7
GSM900_INP RTR6250D TCXO
37 6
VDDA2
GSM900_INN R1011
38 5
VDDA11 VDDA1 6.2K VREG_RFTX_2.85V
39 4 R1010
FAQ1 C1031 C1032
TX_MOD_CP
40 3 6.2K
VDDA12 CP1 0.1u
33p
41 2
C1036 C1037
TX_VCO_FB CP_HOLD1 (PPS)
42 1
(2012) 3.9n 390p
C1040
0.01u
ECHU1C392JX5
VREG_RFTX_2.85V
C1046 C1047 C1048
C1045
33p 33p 100p 0.1u
C1056
0.01u 22p
R1023
TX_AGC_ADJ
1K
C1057
4700p
RF_ON_TX_ON
C1059
100p
C1060
1000p
VREG_TCXO_2.85V
C1066 C1067
1000p 0.1u
19.2MHz
VCC GND
R1026
4 2
X1001
C1072 100ohm
TCXO_PM TRK_LO_ADJ
OUT VCONT
3 1
100p
TG-5001LA-19.2MHz
C1073
TCXO_OUT 0.01u
4.7
VREG_TCXO_2.85V
VREG_TCXO_RF_2.85V
R1029
C1083
10u
R1031
VREG_RFTX_2.85V PA_THERM
80.6K
R1032
R1033
(1%) C1092
68K
470K
0.068u
(1%)
Section Date Sign & Name
Monday, June 12, 2006 U310
MODEL
Designer
Checked
RF
DRAWING
Approved
DRAWING
LG Electronics Inc. U310_REV_1.1
NO.
LG Electronics Inc.
A
B
C
D
E
F
C
D
E
Sheet/
Sheets
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