LG TU550 Service Manual page 140

7. CIRCUIT DIAGRAM
1 2 3
C2001
ANT100
C1910 27p 4p C1000 56p
G2
ANT RF
G1
C1001 56nH
L103 L104
0.75p KMS-507 R1002
NA L1001 L105 NA
SW100
6.8nH
A
C1007
33p
23 1
ANT GND1
22 2
GND6 RX4
C1014 100p 21 3
WCDMA_800 TRX1 RX3
20 4
GND5 RX2
19 5
WCDMA_1900 TRX2 U100 RX1
18 6
GND4 CXG1198AEQ GND2
C1019
17 7
33p NC8 NC1
16 8
L117
NC7 NC2
15 9
NA
L116 NC6 NC3
14 10
NA NC5 NC4
B
C
C1046
C1511
100p
33p
C1828
0.5p
0.5p
C1827
L172
L402 4.7nH
ANTENNA SWITCH MODULE LOGIC 6.8nH
IN_A IN_B IN_C
D
GSM900/GSM850 TX HIGH HIGH LOW
16
DCS_PCS_OUT
DCS/PCS TX HIGH LOW LOW
10
GSM 850 RX LOW HIGH LOW GSM_OUT
UMTS 850 HIGH LOW HIGH
DCS RX LOW HIGH HIGH
PCS RX LOW LOW HIGH
UMTS 1900 HIGH HIGH HIGH
LOW LOW
GSM900 RX LOW
GSM/EDGE
E
WCDMA
WCDMA_1900
ACMD-7402-TR1G FL106 33p
C1071
RX TX
F
R1028
51
56p
C1075
FL107 LM56C
WCDMA_800 ANT TX
C
RX
GND1 GND6
R1029
GND2 GND5 51
GND3 GND4
VREG_RFRX_2.85V
D
C1081
0.1uF
C1082 R1038
100p 5.62K
(1%)
C1084 L145
82p 5.6nH
1
UMTS_L_IN GND3
2
C1823 UMTS_L_BIAS UMTS_H_OUT
3
NA NA UMTS_H_BIAS SBDT
L148 4
E
C1086 UMTS_H_IN VDDM
47nH
C1088
100p RFL6202
U109
L153
C1089
12p 1.5nH
C1824
NA 0.5p
L154
C1090
8.2nH
F
C1091
100p
1 2 3
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4 5 6 7
L101
15nH
VREG_RFRX_2.85V
R1000 1K
ANT_SEL2
R1001 1K
1K ANT_SEL1
ANT_SEL0
C1008 C1009 C1010 C1011
33p 33p 0.1uF 33p
C1444
C1015
33p
33p
L111
6.8nH
L118 L113
4.7nH 5.6nH
C1023
5 4
33p
C1026
G2 O2
IN
NA
1
G1 O1 C1030
2 3
B7837 1000p
FL102
L124
L121
L123
4.7nH
NA 6.8nH C1032 L126
15p 4.7nH
GSM_PA_RAMP
C1829
0.5p
R1008
(1%)
2.2K
C1038
C1041 22n
68p
FL104
NFM21PC105B1A3
2 1
OUT IN +VPWR
4 3
C1051 C1052 G2 G1
33p 100u
C1056
51p
1
DCS_PCS_IN
7 R1014 15
U102 GSM_IN
R1016 15
AND0041
3
TX_EN GSM_PA_EN
2 R1018 R1019
BS GSM_PA_BAND
R1020 R1021
270
270
220 220
R1022
51
VREG_RFTX_2.85V
C1094
L130
1nH 2200p
FL105
C1072
B9014
10p
OUT
C1073 10p C1099
GND2
NA C2002
NA
U105
RF5144
18 1
NC7 VREG_PCS
17 2
NC6 RFIN_PCS
L160 16 3
RFOUT_PCS VREG_CELL
2.2nH 15 4
NC5 VMODE_CELL
14 5
RFOUT_CELL RFIN_CELL
13 6
NC4 VCC1_CELL VREG_W_PA
NA
C1074 C1101 C1102
1.5p
C1077 2200p FL108
4.7u
L1002 B9003
6.8nH
OUT
GND2
L136
NA
VREG_RFTX_2.85V
U107
0.1uF
LMV232TLX
C1109
HDET1
C1078 100p
A1 A3
RFIN1 OUT
R1031
C1110
11K
C1079 100p 1500p
R1032 C1 A2 ( 1% )
C1080 100p RFIN2 FB
R1033
22
22
(0:RFIN2 | 1:RFIN1)
HDET_EN HDET_BAND_SEL
L141
68nH
C1112
B7838
6p
FL109
L142
10nH L143 C1083 L144 8.2nH
6.8nH 82p 5 4 L146
L147
G2 O2 C1115 8.2nH
IN
12 1 G1 O1 NA
11 2 3
C1085 0.1uF
10
NA
9
C1116 6p
L149 C1087 L150 3.3nH
C1117
4.7nH
3.3p 5 4 2.7p
L151 3.3nH
G2 O2 L152
C1118
IN
1 15nH
G1 O1 C1121
2 3
2.7p 0.1uF
B7847
FL110
RF_SBDT
RF_SBST
RF_SBCK
R1041
VREG_MSMP_2.7V
100
C1092 C1093
100p 0.1uF
4 5 6 7
8 9 10 11
L100
1nH
L102
4.7nH
C1004
5 4
33p
C1141
G2 O2
IN
1p
1 G1 O1
C1006
2 3
1000p
B7845
L106 L108
L107
FL100
NA 4.7nH
1nH
C1911
5.6p
L110
FL101
2.2nH
B7851 VREG_RFTX_2.85V
2 3
FB100 C1016
1 G1 O1
33p
IN
G2 O2
C1020
5 4
1000p
L114
C1912 R1004 1.8K
2.2nH
5.6p
R1005
L119
4.7nH 3.3K C1027 C1028
C1029
820p 0.01u
100p
C1031
L125 10n
CP_HOLD2
ECHU1C103JX5
4.7nH 29
CP2_OUT CP2
2 3 30
VDDA9
1 G1 O1 31
FL103
IN UHF_LO_BUFF RX_VCO_IN
R1006 11K 32
G2 O2 B7844
C1033 R_BIAS
5 4 (1%) 33
1000p GSM1800_INN
L127 34
L128 GSM1800_INP
4.7nH 35
4.7nH VDDA10
36
GSM900_INP
37
GSM900_INN
38
R1037 0 VDDA11
R1036 39
TX_MOD_CP
40
100
C1039 C1040 VDDA12
R1010 41
120p 330p TX_VCO_FB
42
33 33p
C1045
C1043
5.6n
ECHU1C562JX5
C1048
82p
TX_ON
R1012
VREG_MSMP_2.7V
100
C1503 C1054
C1055
0.01u 1000p
100p
MQW5V0C869M X101 FB102
10 3
VC VB VREG_RFTX_2.85V
1 9 R1015 100
OUT_GSM SW1 GSM_TX_VCO_1_EN_N
5 11 R1017 100
OUT_DCSPCS SW2 GSM_TX_VCO_0_EN_N
8 2 C1062
C1063 C1064 C1065 C1066 TX VCO CONTROL LOGIC
GND5 GND1
12 4
GND6 GND2 33p 15p 15p
13 6 0.1uF 4.7u
GND7 GND3
14 7
tcc_1608h_9_r SW2 SW1
GND8 GND4
GSM850/900 HIGH LOW
DCS1800/PCS1900 LOW HIGH
NO OSCILLATION HIGH HIGH
KRX102E
Q101
C1500
1000p PA_ON0
VCC
VREG_TCXO_2.85V
4
VREG_RFTX_2.85V C1130 C1131 OUT
3
0.1uF 1000p
L401 3.9nH
WCDMA_1900_TX_OUT
IN
C1133 100p
GND1
TCXO_PM
L132
C1134 1000p
NA
RTR6250_TCXO
C1135 1000p
Q100 RFR6202_TCXO
KRX102E
C1137
PA_ON1
VREG_RFTX_2.85V
C1501
1000p
Q102
KRX102E
C1105
33nH
UHF_VCO_0_EN
IN WCDMA_800_TX_OUT
GND1
C1106 VREG_SYNTH_2.85V
L135
NA
NA
R1030
UHF_BAND_SEL
1K
MQW541A1G44 X100
1
OUT
(5.62K : NEAR TO RFR6202 )
3
C1111 SWITCH
0.01u
8
GND4
6
GND3
(5.62K:NEAR TO RFR6202)
R1035
11K (1%) VREG_RFRX_2.85V
FB104
C1113 C1114
4.7u
0.1uF
RX0_Q_P
RX0_Q_M
RX0_I_P
1 30
GND1 RX_IM RX0_I_M
2 29
UMTS_L_INP VDDA7
3 28
GND2 TCXO RFR6202_TCXO
4 27
VDDA1 U108 VDDA6
5 26
GND3 RFR6202 SBDT RF_SBDT
6 25
UMTS_H_INP SBCK RF_SBCK
7 24
GND4 SBST RF_SBST
8 23
UMTS_H_INM VDDM VREG_MSMP_2.7V
9 22 51 R1040
GND5 GND8
10 21
DNC1 DNC3 C1119 C1120
100p 0.1uF
C11230.1uF
Closed to VDDA5
C1124 100p
UHF_LO_BUFF
C1125 27p
C1126 27p
R1042
C1127
100
12p
8 9
- 141 -
12 13 14 15
DAC_REF
TX_I_M
150p
C1002
150p
C1005
TX_I_P
TX_Q_M
150p
C1012
150p
C1013
R1003
C1017 C1018
10
33p 0.1uF
L112
47nH
C1021 C1022
C1024 C1025
47nH
4.7u
33p
L120 100p 0.1uF
RX_IN
14
RX_IP
13
RX_QN
12
RX_QP
11
VDDA4
10 R1043
VCO_TUNE
9 10
RTR6250D VTUNE_REF L129 47nH
8
U101 VDDA3
7
TCXO
6
VDDA2
5
VDDA1 R1009 3.3K ( 1% ) C1034 C1035 C1036
4
FAQ1
3 33p
C1037
CP1
33p 0.1uF
2 390p
CP_HOLD1 C1042 C1821
1 2.2u
3.9n
ECHU1C392JX5
C1047
R1011
0.01u 6.2K ( 1% )
C1049 4.7p
C1050 6p
FB101 R1013 1K
C1507
C1058 C1059
C1060
33p C1061
100p 0.1uF
4.7u
4700p
TCXO
19.2MHz
Thermistor Circuit
GND
2
R1023
VCONT TRK_LO_ADJ
1
100
X102
C1132
0.01u
R1024
68K
R1025
VREG_MSMP_2.7V
80.6K
R1026
(1%) C1140
470K
VREG_BT_2.85V 0.068u
(1%)
R1027 100K
C1136
VCC
1000p
1000p 5
2 4
TCXO_BT
U110 3
TC7S04FU GND
BLUETOOTH
C1155
1000p
C1107 C1108
4.7u
0.1uF
M1
RB06A
7 1
VCC GND1
R1900
16 7
ANT GND2
5 15
CON CP2_OUT 0 GND3
2
GND1
4
GND2
C1158
1u
C1156
1000p C1157 100p
1u
C1153
0.1uF C1151
C1150 100p
VREG_MSMP_2.7V
Section Section Date Date Sign & Name Sign & Name
10/31 TU550
CU500 CU500
MODEL MODEL
SH NAM
Designer Designer
2005 2005
Checked Checked
DRAWING DRAWING
RF/BT
NAME NAME
Approved Approved
DRAWING DRAWING
LG Electronics Inc. LG Electronics Inc. MAIN_1.2
NO. NO.
LGE Internal Use Only
16
A
TX_Q_P
VREG_SYNTH_2.85V
B
RX0_I_M
RX0_I_P
RX0_Q_M
RX0_Q_P
VREG_RFTX_2.85V
RTR6250_TCXO
C
WCDMA_800_TX_OUT
WCDMA_1900_TX_OUT
TX_AGC_ADJ
VREG_RFTX_2.85V
D
RF_SBST
RF_SBDT
RF_SBCK
E
PA_THERM
F
C
D
VREG_BT_2.85V
C1152
2.2u
E
Sheet/ Sheet/
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