Circuit Diagram - LG KU380 Service Manual

7. CIRCUIT DIAGRAM

1 2 3
ANT100 ANT101 ANT102 ANT103
C100
L101 SW100
A 56p
G2
ANT RF
G1
3.3nH
KMS-507
C101
L102
1.5p
15nH L103
100nH
U100
L106
19
VREG_RF_SMPS VDD GSM900_RX1
7.5nH
GSM900_RX2
C110 GSM1800_RX1
B 10p GSM1800_RX2
7
GND1 GSM1900_RX1
8
GND2 GSM1900_RX2
10
GND3 WCDMA2100
12
GND4
13 D5011
GND5
15
GND6
17
GND7
20
GND8
21
GND9 GSM900_TX
23
GND10 GSM18001900_TX
C
D
E
GSM/EDGE
WCDMA
F
L123
1.8nH
FL102
4 1
PGND RX 3.9p
3 2
ANT TX
C154
ACMD-7602
L126
12nH
20dB
C
CP0402A1950DNTR
R123
D
E
F
1 2
LG(42)-A-5505-10:01
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4 5
ANT_SEL0 ANT_SEL1
GSM 1800/GSM 1900 RX LOW LOW
GSM 850/ GSM 900 RX HIGH LOW
GSM 850/GSM 900 TX/ WCDMA LOW HIGH
GSM 1800/GSM 1900 TX HIGH HIGH
C106
5
NA
DCS
6
1
2
3
4
9
18
CTRL1 ANT_SEL0
22
1K R102
CTRL2 ANT_SEL1
1K R103
C115
PCS
C116 C117 0.5p
16
33p 33p
14
C120
EGSM
NA
L115 L116
8.2nH
18nH
R110
GSM_PA_RAMP
2.2K
C131
68p
C122 L117
8.2p 1.5nH NEAR TO PAM
+VPWR
C133 C134
NA NA
C136 C132
33p 33u
2
DCS_PCS_IN
16 7
DCS_PCS_OUT U102 GSM_IN
SKY77329
R118 100ohm
9 1
GSM_OUT TX_EN GSM_PA_EN
3 R119 100ohm
BS GSM_PA_BAND
C143 C144
15p 15p
GSM_PA_BAND
NEAR TO PAM
NEAR TO PAM
+VPWR +VPWR
C149 C151 C152
4.7u 1u 1u
AWT6277R U104
11
GND5
10 1
C155 VCC2 VCC1
9 2
10p
GND4 RFIN
8 3
RFOUT GND1
7 4
GND3 VMODE
6 5
GND2 VREF
L127
C157 NEAR TO PAM
15nH
NA
C158
100p
U103
PWR_DET
R122
R124
47
130 130
7dB
VREG_TCXO_2.85V
C175 100p
TCXO_PM
C177 1000p
RTR6275_TCXO
4 5 6 7
L104
C104
2.2nH NA
L105
2.2nH C107
L107
DCS_PCS_TX
C108
2.2nH
GSM_TX
C111
L108
TX_ON
2.2nH
TX_AGC_ADJ
L109
3.9nH DAC_REF
L110
C118
12p
2.2nH
R104 12K
L111 12nH
R105 680
SSBDT_RTR
C119
L112
12nH
L113 12nH
10dB
R111
DCS_PCS_TX
68
FL100
6dB
4 5
R115
O1 G3 1
GSM_TX
IN
G2 G1
39
3 2
EFCH897MTDB1
MODE
LOW GSM
DCS/PCS
HIGH
VDD_RX
C148
8.2p
FL101
EFCH1950TDF1
4 5
O1 G3 1
L122 L121
IN
G2 G1
NA
5.6nH
3 2
C153
2.2p
PA_R0
1
IN
TR100
KRX102U
L130
10nH
PA_ON
VREG_TCXO_2.85V
C162
100p
L131 C166
2.2nH 10p
L132
2.7nH
TCXO
DSA321SCE-19.2M X100
100ohm R126
4 1
VCC VCONT TRK_LO_ADJ
3 2
OUTPUT GND
8 5
NC4 NC1
7 6
NC3 NC2
R127 100K
C176
1000p
VCC
5
C178 0.01u 2 4
TCXO_BT
U105 3
GND
TC7SH04FU
8 9
- 143 -
14 15
TX_IP
C102
180p
C103
C105 180p
NA TX_IM
55 2
ENV_OUT ENV_LNP TX_QP
1
8.2p ENV_LNN C109
46
HB_RF_OUT1 180p
44 51
HB_RF_OUT2 TX_IP
6p
50
TX_IN C112
43 53
LB_RF_OUT1 TX_QP 180p
12p
42 52
LB_RF_OUT2 TX_QN TX_QM
24 7
RF_ON TCXO RTR6275_TCXO
C113 3300p
56 5
VCONTROL VTUNE1
C114 1000p
18
VTUNE2
54
VTUNE-Connected directly to GND
DAC_REF
12
RX_IP RX_IP
U101 13
14
SBDT RX_IN RX_IM
(1%) RTR6275
3 10
R_BIAS1 RX_QP RX_QP
27 11
R_BIAS2 RX_QN RX_QM
(1%)
40
PWD_DET_IN PWR_DET
22p
31 21
GCELL_INP TEST
30 R106 5.1
GCELL_INN
4 R107 2.7
VDDA1
32 6
EGSM_INP VDDA2
33 8 R108 2.7
EGSM_INN VDDA3
9
R109 5.1
VDDA4
38 15
DCS_INP VDDA5
39 16
VDDA6 L114 47nH
DCS_INN
19
VDDA7
36 20
GPCS_INP VDDA8 C130
28
37
GPCS_INN VDDA9 22p
41
VDDA10
22 45
CAL_INP VDDA11
23 47
CAL_INN VDDA12 L118
48
VDDA13
47nH
26 49
WLNA_IN VDDA14
R114 10
L119
47nH
R120
100ohm
C145 C146 C147
1000p 22p 0.01u
C150
L120
100p
1nH
L124 C156
4.7nH 2.2p
BLUETOOTH
5 4
L125
G2 O2
FL103
4.7nH
EFCH2140TDE1
G1 O1
2 3
L129 C160
C159
2.2p
4.7nH
100p
L128
NA
M100
LBRQ-2B43A
C163 1000p
9 4
BT_CLK CLK_REF SBST
11
SBCK
C164 1u 3 12
VCC_OUT SBDT
C165 2.2u 2 5
VDD_INT SYNC_DET_TX_EN
R125
10 13
VREG_MSMP_2.7V VDD_MSM RX_BB_TX_BB
0
14 7
VREG_BT_2.85V VDD_BAT XTAL_IN
1000p C167
LGE Internal Use Only
16
A
B
C
VREG_RF_SMPS
C121
22u
VREG_SYNTH_2.6V
D
VDD_RX
VREG_RF_SMPS
VREG_MSMP_2.7V
E
F
AMAA802012LG09
C
GND1
FEED GND2
ANT104
BT_SBST
BT_SBCK
BT_SBDT
BT_TX_RX_N
D
BT_DATA
TCXO_BT
E
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