Circuit Diagram - LG P705 Service Manual

7. CIRCUIT DIAGRAM

SW1000
C1106
G1
2
G2 ANT ANT COMMON
2.7n 1
G3 G4
3 4
L1042 L1043
DNI DNI
0603
R1000
GSM_PA_RAMP
2.2K
C1024
39p
R1003
1
GSM_HB_TX HB_IN
47 2
GND1
3
DCS(1710-1785 MHz)
7dB LB_IN
4
PCS(1850-1910 MHz) VAPC
5
VBATT
6
BS2
7
BS1
R1006 8
GSM_LB_TX TXEN_
33
GSM850(824-849MHz)
29
7.4dB
PGND1
GSM900(880-915MHz) 30
PGND2
31
PGND3
32
2mm PGND4
33
PGND5
VBAT
34
PGND6
0603
C1033
C1034
0603
47p
C1049 1n
10u
1n
C1050
C1051 1n
C1052 1n
ANT_SEL[3]
ANT_SEL[2]
ANT_SEL[0]
ANT_SEL[1]
ANTENNA SWITCH MODULE LOGIC(SKY77544)
ANT_SEL0
GSM850/GSM900 TX LOW
DCS1800/PCS1900 TX HIGH
PCS1900 RX LOW
DCS1800 RX LOW
GSM900 RX
HIGH
GSM850 RX HIGH
W1700 HIGH
W900(W850) LOW
W2100 HIGH
WCDMA Dual
VSNS_RF_SMPS_2.1V
L1026
2n
C1089
R1014 C1088 33p
3.3n
0
C1090
DNI
R1015
DNI
LGE Internal Use Only
C1094
1.8n
WCDMA_HB_RTX
C1009 100p
C1012
L1000
L1001
L1002
DNI
DNI 100n L1003
FL1000 82n
C1013 100p
4 7
IN_881_5 OUT_881_5_1
6 C1014 3.3p
OUT_881_5_2
9
C1018 3.9n OUT_942_5_1
1 8
IN_942_5 OUT_942_5_2
2 5
GND1 GND3
3 10
L1005 GND2 GND4
L1006
DNI
44
PGND16 0.5p
43
PGND15
42
PGND14
41
PGND13
22
GND5
21
GND4
U1001
20
GND3
19
GND2
18
ANT
GSM Quad
17
WCDMA3
FEM 16
WCDMA2
15
WCDMA1
40
PGND12
39
PGND11
38
PGND10
DNI
L1009
L1014
1842.5MHz,1960MHz
FL1001
C1056 2.4n 0.5p
4 7
IN_1842_5 OUT_1842_5_1
6
OUT_1842_5_2
9
OUT_1960_1
C1058
18p 1 8
IN_1960 OUT_1960_2
2 5
GND1 GND3
L1012
3 10
GND2 GND4
4.7n
L1011
0.75p
ANT_SEL1 ANT_SEL2 ANT_SEL3
HIGH LOW LOW
HIGH LOW LOW
LOW LOW (X) HIGH
HIGH LOW (X) HIGH
C1068 FL1002
HIGH LOW (X) HIGH
6
WCDMA_LB_RTX ANT
15p
LOW LOW (X) HIGH
L1017 L1018
LOW LOW LOW DNI 4.7n
2
GND1
4
GND2
LOW HIGH LOW
5
GND3
LOW HIGH LOW
BAND8(2520) : SAYRJ897MCA0B0A
BAND5(2520) : B7671
FL1005
L1027 1.5n
6
WCDMA_HB_RTX ANT
L1029 L1030
15n 6.8n
2
GND1
4
GND2
5
GND3
BAND1(2520):B7697
BAND2(2520):ACMD-7407
L1028
C1086
WCDMA_HB_MIX_INM
1.2n
3.9p
2 3
FL1006
1 G1 O1
IN C1087
G2 O2
DNI
5 4
L1032
C1093
WCDMA_HB_MIX_INP
1.2n
3.9p
M7
TX_ON RF_ON
C1
TCXO_RTR_19.2MHZ TCXO
M3
RTR6285_SSBI SBDT
100p
C1002 A10
GSM_LB_TX
LB_RF_OUT1
C1003 100p B9
WCDMA_LB_TX LB_RF_OUT2
33p
C1006 A9
GSM_HB_TX
HB_RF_OUT1
A8
HB_RF_OUT2
C1010 33p
A7
WCDMA_HB_TX HB_RF_OUT3
3.3p
N9
WCDMA_LB_RX_P WPRXLBP
M9
WCDMA_LB_RX_M WPRXLBM
N10
L1004 WPRXHBP
GSM(869-894 MHz) N11
WPRXHBM
8.2n
H13
WDRXLB
GSM850_RX_P
J12
WDRXHB1
J13
C1023 WDRXHB2
C13
GSM850_RX_P
12n GCELL_INP
B13
GSM850_RX_M GCELL_INN
L1007
GSM(925-960 MHz) C12
10n GSM900_RX_P
EGSM_INP
B12
GSM900_RX_M EGSM_INN
C1025
E13
GSM900_RX_P
DCS_RX_P DCS_INP
12n D13
DCS_RX_M DCS_INN
E12
PCS_RX_P GPCS_INP
D12
PCS_RX_M GPCS_INN
C1026 100p G13
GPS_IN GPS_IN
C1030 100p
A12
PDET_IN PDET_IN
R1007 12K
A2
TX_RBIAS
1%
L1008
DNI
K13
5.6n WPRXSE1
C1032 L13
WPRXSE2
33p
C1053
WCDMA2100_RX_LNA_OUT
DCS_RX_M
2.2n
WCDMA1900_RX_LNA_OUT
L1013
DCS(1805-1880 MHz)
33n
C1057
DCS_RX_P
2.2n
C1059
PCS_RX_M
1.2n
L1010 PCS(1930-1990 MHz)
12n
C1063
PCS_RX_P
1.2n
C1064 18p
L1031
1
RX
1.2n L1015 L1016
DNI
3
TX 8.2n
L1033
9 39n
GND6
8
GND5
7
GND4
R1010
PDET_IN
62
2.2n
C1084
L1024 L1025
DNI
0.5p
L1038
1
RX
2.2n
3
TX DNI
7
C1102
GND4
8
GND5 VREG_RF_2.7V
9
GND6
C1104
10n
6 17
RFINM PGND
C1097
7 16
RFINH RFOUTM
U1003
10p
8 15
L1039 RFGNDM1 RFOUTH
2.7n
9 14
RFGNDM2 RFOUTL
C1098
22p
C1103
3.3p
L1034
8.2n
C1105
22p
- 131 -
C1000
150p
A4
TX_IP
B5
TX_IN C1001
B3
TX_QP 150p
B4
TX_QN
E1
C1004 10n
VTUNE1
N5 C1005 10n
VTUNE2 TX_Q_P
G1 C1007 1n
VTUNE_GPS
C1008
150p
J1
PRX_QP RX0_Q_P
J2
PRX_QN RX0_Q_M
K2
PRX_IP RX0_I_P C1011
K1
RX0_I_M 150p
PRX_IN
L1
DRX_QP RX1_Q_P
L2 TX_Q_M
DRX_QN RX1_Q_M
M1
DRX_IP RX1_I_P
M2
DRX_IN RX1_I_M
N2
U1000 C1019 C1020 C1021 C1022
NC
A3 0.1u 0.1u 0.1u 0.1u
DAC_IREF DAC_REF
A11
VDDA1_1
D1
VDDA1_2
D2
VDDA1_3
F1
VDDA1_4
H1
VDDA1_5
H2
VDDA1_6
A5
VDDA2_1
A6
VDDA2_2
B1
VDDA2_3
B6
VDDA2_4
B10
VDDA2_5
F2
VDDA2_6
F13
VDDA2_7
G2
VDDA2_8
L12
VDDA2_9
M6
VDDA2_10
N3
VDDA2_11
N6
VDDA2_12
N7
VDDA2_13
C1035 C1036 C1037 C1038 C1039 C1040 C1041 C1042 C1043 C1044 C1045 C1046
0.1u 4.7u 0.1u 4.7u 0.1u 0.1u 4.7u 0.1u 0.1u 0.1u 0.1u 0.1u 0.1u
C1054 C1055
0.1u 4.7u
C1060 C1062
C1061
22p 100p 0.1u
Near to 4 Pin Near to 12 Pin
Near to 12 Pin
1mm
VBAT
C1067
C1065 C1066
1n 330p
10u
U1002 FL1003
L1020
C1071
14 1 4 1
OUT_BAND_VIII IN_BAND_VIII OUT IN
13 2 5.6n
100p
GND3 VMODE_0 PA_R0
12 3 G3 G2 G1
VCC2_2 VMODE_1
11 4 5 3 2
GND2 VCC2_1 L1021
10 5
OUT_BAND_I VEN_BAND_VIII PA_ON1
DNI
9 6
GND1 VEN_BAND_I
8 7
CPL_OUT IN_BAND_I
15
PGND1
FL1004
C1080 L1022 3
C1081
G3
4 1
OUT IN
BAND18:SKY77195 3.3n
G2 G1
33p
BAND15: 0603 5 2
BAND25:
L1023
8.2n
L1040
2.7n L1041 2.7n
C1099
2.7p
C1095 2.7p
FL1007
2 3
L1035 22n C1107 33p C1101
1 G1 O1 L1037
IN
DNI 10n
G2 O2
5 4
C1100 C1096 2.7p
DNI
Copyright © 2012 LG Electronics. Inc. All right reserved.
7. CIRCUIT DIAGRAM
TX_I_P
TX_I_M
R1001
VREG_RF_2.7V_RTR
0
C1015 C1016 C1017
1n 0.1u 4.7u
VREG_RF_2.7V
VSNS_RF_SMPS_2.1V
R1002 0
VREG_SMPS_2.1V
C1027 C1028 C1029
0.1u 10u 4.7u
C1047 C1048
4.7u
W900/850
C1072 C1073
WCDMA_LB_TX
6.8n
12n
C1074
1p
W2100/1900
C1082 2.2n
100p
C1083
DNI
Only for training and service purposes