Circuit Diagram - LG U8500 Service Manual

7. CIRCUIT DIAGRAM

ANT1000
ANT1001
SW1002
C1230
G2
ANT RF
G1
15p
KMS-512
C1112
L1035 L1034
0.5p
4.7nH 15nH C1111 33p
L1031 7.5nH
FXL4T245BQX U1008
1 9 2
VREG_RFRX_0_2.85V VCCA _OE
14 4
VCCB
6 11
C1108 T__R
7 20
0.1u
GND1
8
GND2
15
BGND
13 2 8
ANT_SEL0 B0 A0
12 3
ANT_SEL1 B1 A1
11 4
ANT_SEL2
B2 A2
10 5
B3 A3
R1050
0
L1026
NA
GSM/DCS/PCS
WCDMA
12p C1113
5.6nH
C1114
L1002
NA
R1011 270
TX_AGC_ADJ
C1028
0.01u
C1001
27p
1.8K
C1031 100p
R1013
R1012
PA_ON
G1 10K
G2
ANT G3
G4
G5
G6
G7
C1008 12p L1001 2.7nH
R1003
0
C1043
1.2p
VREG_RFRX_1_2.85V
ANT_SEL2 ANT_SEL1 ANT_SEL0 GSM_PA_BAND MODE
GSM 900 TX LOW LOW HIGH LOW GSM
GSM 900 RX/WCDMA LOW LOW LOW HIGH DCS/PCS
DCS1800/PCS1900 TX HIGH HIGH LOW
DCS 1800 RX LOW HIGH LOW
PCS 1900 RX HIGH LOW LOW
M054E
U1006
12
CTRL1 RX_DCS1
13
CTRL2 RX_DCS2
14
CTRL3 RX_PCS1
15
CTRL4 RX_PCS2
16
RX_EGSM1
17
RX_EGSM2
3
UMTS TX_DCSPCS
1
TX_EGSM
R1049
0
+VPWR
C1100
C1104
0.01u
68u
L1025
NA
C1098 C1070
10u
C1102 0.01u
68p
R1027
15 3
DCS_PCS_OUT DCS_PCS_IN
24
R1032
11 4
U1005
GSM_OUT GSM_IN
15
18
100 R1041
SKY77328 ENABLE GSM_PA_EN
19 1
RSVD_GND BS GSM_PA_BAND
R1044 100
C1103 C1101
15p 15p
SKY77410
U1002
C1215 R1015
RF_OUT RF_IN
11 3
12p
0
C1034
NA
VREG_W_PA
C1026
10u
+VPWR
C1037
0.01u
C1032 TR1000
UMC4N
0.01u
PA_ON
HDET
VREG_RFTX_2.85V
U1001 LMV225TLX
A1 A2
RFIN_EN VDD VREG_RFTX_2.85V
B1 B2
GND OUT HDET1
C1030 C1007
1200p 27p
13
ILNA_OUT PLNA_OUT PGND
14
ILNA_OUT GLNA_BIAS
15
PLNA_BIAS GLNA_IN
16
L1004 100nH
PLNA_IN R_BIAS
17
ILNA_BIAS VDDA8
18
ILNA_IN SBST
19
VDDRF3 EUSY0246001 SBDT
20
C1045 RX_IP U1000 SBCK
21
680p RX_IM VDDM
22
RX_QP GRX_IP
23
RX_QM GRX_IM
24
VDDA2 GRX_QP
GRX_QM
C1049 C1048
0.1u 10p
C1058 C1056 RX_QM
0.1u 10p
R1004
RX_QP
0
RX_IM C1017
C1016 3.9n
C1014 C1012 RX_IP 470p
0.1u 100p
TX_VCO_EN_0_N TX_VCO_EN_1_N
GSM900 HIGH LOW
DCS1800/PCS1900 LOW HIGH
OFF HIGH HIGH
L1032 3.3nH
1930-1990 MHz
L1033 3.3nH
VREG_RFTX_2.85V
VREG_RFRX_0_2.85V
L1029 5.1nH
C1089
0.1u
L1016
7.5nH
1805-1880 MHz
C1087
1000p C1092
L1017
0.1u
7.5nH
L1030 5.1nH
L1027 10nH
L1014
9.1nH
925-960 MHz R1037
C1086
1000p 82
L1015
C1083 C1085 C1084 (PPS)
9.1nH
120p 1000p 22n
L1028 10nH
R1036
MQW5V0C869M U1003 FB1000
47
10 3
VC VB VREG_RFTX_2.85V
R1025 100
1 9
GSM_TX_VCO_0_EN_N
OUT_GSM SW1
5 11 R1026 100
OUT_DCSPCS SW2 GSM_TX_VCO_1_EN_N
R1030
8 2
GND5 GND1 VREG_MSMP_2.7V
12 4
51
GND6 GND2
13 6
GND7 GND3
14 7
VREG_RFTX_2.85V
GND8 GND4
C1077 C1080
R1034
C1073
10u
0.1u
51
C1047
ILNA_OUT
FL1002
8.2p
EFCH1950TDC1 3
C1082 5.6p
G3 R1031
4 1
OUT IN
L1005
G2 G1
0
2.2nH
5 2
L1013
8.2nH
IMT_RX_P
IMT_RX_M
VREG_TCXO_RFR
C1051 C1013 C1023
10p 5p 10p
10u 0.1u
VREG_TCXO_RFR
49
48
47
46 R1008
45 11K
44
SBST
43
SBDT
42
SBCK
R1009
41
VREG_MSMP_2.7V
40
51
39
C1020 C1019
38
10p 1u
37
C1018
0.01u
- 147 -
DAC_REF
TX_IM
L1018
3.6nH
TX_IP
C1088
TX_QM
1000p
L1019
3.6nH
TX_QP
R1022
C1093 VREG_RFTX_2.85V
33p 10
C1091
0.1u
VREG_SYNTH_2.85V
C1052
0.1u
C1057
R1038
RX_IM
CP_HOLD2 RX_IN 0.1u
29 14
0 CP2 RX_IP RX_IP
30 13
VDDA9 RX_QN RX_QM
31 12
RX_VCO_IN RX_QP RX_QP
R1024
R1039 32 11
R_BIAS VDDA4
11K (1%) 33 10
C1064 C1062 10
GSM1800_INN VCO_TUNE
34 9
GSM1800_INP RTR6250 VTUNE_REF 47p
35 8 1u
VDDA10 U1004 VDDA3
36 7
GSM900_INP TCXO
37 6
VDDA2 R1019
GSM900_INN
38 5
6.2K
VDDA11 VDDA1
39 4 R1018
TX_MOD_CP FAQ1
40 3 6.2K
VDDA12 CP1
41 2
TX_VCO_FB CP_HOLD1 C1046 C1040
42 1 C1061
3.9n 390p C1059
C1079 C1044 0.1u
(PPS) 33p
82p 0.01u
VREG_RFTX_2.85V
C1074 C1042 C1035 C1039
C1076 C1081 C1072 33p 33p 100p 0.1u
0.1u 0.01u 22p
R1017
RF_ON_TX_ON TX_AGC_ADJ
100p
C1078 C1075 1K
100p 4700p
C1055 33p
IMT_RX_P
L1011
3.9nH
FL1001
C1010
2 3
R1048 C1060 0.1u 1000p
G1 O1 L1007
1
IN
G2 O2 33nH
0
LN04A 5 4
L1010
C1004 C1003
3.9nH
C1054 33p
1000p 0.1u
IMT_RX_M
19.2MHz
VCC GND
4 2
X1000
OUT VCONT
3 1
TG-5001LA-19.2MHz
C1009
1000p
4.7
VREG_TCXO_2.85V
R1021
C1021 C1053 C1063
10u
0.1u 100p
R1040
VREG_RFTX_2.85V
80.6K
(1%)
VREG_RFTX_2.85V
VREG_RFTX_2.85V
VREG_TCXO_2.85V
R1002
TRK_LO_ADJ
100
C1005
0.01u
C1011 100p
TCXO_PM
TCXO_BT_IN
PA_THERM
R1043
RT1000 C1097
0.068u
470K
(1%)
68K
U8500