Circuit Diagram - LG CT815 Service Manual

7. CIRCUIT DIAGRAM

1 1 2 2 3 3
ANT101 ANT102 KMS-518
G1
A
C
R101 G2
0
SW101
A A R102 0 C4 0
C5 33p
C11
ANT103 L103
L104
0.75p
0.75p 100nH
FL102
R103
D5015
DNI
PCS_RX1
PCS_RX2
2
ANT PCN_RX1
PCN_RX2
1
GND1 EGSM_RX1
8
GND2 EGSM_RX2
10
GND3
23
GND4 GSM850_RX1
24
B B GND5 GSM850_RX2
WCDMA_2100
WCDMA_850
WCDMA_1900
PCN_PCS_TX
+2.75V GSM850_EGSM_TX
L109
VREG_SYNTH
15nH
C34 C35
0.1u 33p
ANT_SEL0
ANT_SEL1
ANT_SEL2
ANT_SEL3
C C
ANTENNA SWITCH MODULE LOGIC
ANT_SEL0 ANT_SEL1 ANT_SEL2 ANT_SEL3
GSM850/EGSM TX HIGH HIGH LOW LOW
PCN/PCS TX HIGH LOW LOW LOW
WB 850 LOW LOW HIGH HIGH
WB 1900 LOW HIGH LOW HIGH
WB 2100 LOW LOW LOW HIGH
GSM850 RX LOW HIGH HIGH LOW
D D EGSM RX LOW LOW HIGH LOW
PCN RX LOW HIGH LOW LOW
LOW LOW LOW LOW
PCS RX
ANT104 ANT105
R123 100p
R127
C72 L116
0
NA NA
E E
FL106
B9416
L117 L118
1 4
OUT IN
G1 G2 G3 6.8nH 4.7nH
2 3 5
C77 DNI DNI
DNI C80 C81
U104
6.8K
2 5
C88
GPS_LNA_EN S_D VDD
R130 3 4
GND FIL_OUT
33p
LNA for the GPS ALM-1412
SMZY0016501
F F
WCDMA
VDD_RX
SFSY0034601
C101 C102
FL110
0.1u 100p
L126
SAFEB1G96FL0F00
2.2nH
2 3
C111 C112
1 G1 O1
RX_WCDMA_1900_LNA_OUT IN
G2 O2
G G 33p
33p
5 4
L131
NA
WCDMA RX 1900 LNA Circuit
VDD_RX
C123 C124 SFSY0028201
0.1u 100p L137 FL113
C126
2.2nH 33p
SAFEB2G14FB0F00
5 4
L142
H H C132 33p
G2 O2
RX_WCDMA_2100_LNA_OUT
IN
1
2.7nH G1 O1
2 3
C135
DNI
WCDMA RX 2100 LNA Circuit
1 1 2 2 3 3
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4 4 5 5 6 6
C1 1.8p
RX_GSM_850_M
GSM(869-894 MHz)
L101 L102
NA 22nH
C6 1.8p
RX_GSM_850_P
C14 2.2p
RX_GSM_900_M WCDMA_1900_TX_OUT
WCDMA_2100_TX_OUT
GSM(925-960 MHz)
L105 L106
18 NA 18nH
19
C18 2.2p
RX_GSM_900_P
16
17
14
15
12 C28 4.7p
RX_DCS_M
13
TX mode
20
WCDMA 850
21 L107 L108
DCS(1805-1880 MHz)
WCDMA 1900
22 NA 4.7nH
WCDMA 2100
9 C31 4.7p
RX_DCS_P
11
RX mode
C32 2.7p
RX_PCS_M WCDMA 850
WCDMA 1900
WCDMA 2100
PCS(1930-1990 MHz)
L110 L111
NA 3.9nH
C38 2.7p
RX_PCS_P
GSM
GSM850(824-849 MHz)
GSM900(880-915 MHz)
2mm
VBAT
C60
C61 L113 C62
(2012)
100p 33u
33p
100p
L114
27nH
2
BAND_SELECT
9
GSM_OUT
C68 C69 1
DCS_PCS_IN
11
DCS_PCS_OUT
Rev 1.1 for the TRP
2.7nH 8
4.7p GSM_IN
U102
DCS1800(1710-1785 MHz)
L115 7 3
GND1 TQM7M5012 TX_EN
PCS1900(1850-1910 MHz) 12
6.8nH GND2
4
VBATT
6
NC1
10 5
NC2 VRAMP
SMPY0017001
R129
VREG_RFRX_1
12ohm
C78 C79
10p 0.1uF
FL107
B7683
R131 33p
33p
C89 33p C90
GPS_IN ANT TX
C92 RX1
C93
DNI RX2
GND1
DNI
GND2 GND5
GND3 GND4
SDDY0004701
Band V
W1900 TX(1850 - 1910 MHz)
FL109
C103 C104
Rev.C ACMD-7402-TR1G
WB1900_MIX_INM
33p 33p G1
L129 C110
G2
ANT G3 SDPY0002902
W1900 RX(1930 - 1990 MHz) 3.3nH
33p
L133 G4
Band II
4.7nH G5
L130
G6
NA
G7
C113 C114
WB1900_MIX_INP
33p 33p
Rev.C
FL112
B7684
GND3 GND6
GND2 GND5
GND1 GND4
C127
WB2100_MIX_INP
3.3p
RX_OUT
C130 L141
ANT TX_IN
L140
W2100 RX(2110 - 2170 MHz) 2.2nH
33p
2.7nH
C136 SDMY0001501
DNI
Band I
C139
C138
WB2100_MIX_INM
33p 3.3p
4 4 5 5 6 6
7 7 8 8 9 9
U101 RTR6285
TP101
26
RTR_TX_ON RF_ON TX_IP
2
TCXO_RTR_19.2MHz TCXO TX_IN
20
SSBDT_RTR SBDT TX_QP
TX_QN
C3 100p 55
GSM_TX LB_RF_OUT1
57
WCDMA_850_TX_OUT LB_RF_OUT2 VTUNE1
VTUNE2
C9 33p
56
DCS_PCS_TX HB_RF_OUT1 VTUNE_GPS
FL101 58
HB_RF_OUT2
C12 33p
1 5 59
OUT1 IN HB_RF_OUT3 PRX_QP
3
OUT2 PRX_QN
6 30
VC1 C15 RX_WCDMA_850_P WPRXLBP PRX_IP
2 4 31
GND VC2 DNI RX_WCDMA_850_M WPRXLBN PRX_IN
32
WPRXHBP
UPG2214TK C16 33p
R104 1K 33
INTER_TX_SW_1 WPRXHBN DRX_QP
R105 1K
INTER_TX_SW_2 DRX_QN
C17 22p
41
WDRXLB DRX_IP
C19 C20
DRX_IN
C21 22p
40
WDRXHB1
C22 22p
100p 100p 39
WDRXHB2 NC
50
DAC_IREF
RX_GSM_850_P GCELL_INP
51
RX_GSM_850_M GCELL_INN
VDDA1_1
48
VDDA1_2
RX_GSM_900_P EGSM_INP
49
INTER_TX_SW_1 INTER_TX_SW_2
RX_GSM_900_M EGSM_INN VDDA1_3
H H VDDA1_4
46
L H RX_DCS_P DCS_INP VDDA1_5
47
RX_DCS_M DCS_INN VDDA1_6
H L
44
RX_PCS_P GPCS_INP VDDA2_1
45
RX_PCS_M GPCS_INN VDDA2_2
INTER_RX_SW_1 INTER_RX_SW_2
VDDA2_3
42
H H GPS_IN GPS_IN VDDA2_4
C33 33p 52
PDET_IN PDET_IN VDDA2_5
L H R111 12K 1% 68
TX_RBIAS VDDA2_6
H L
38
RX_WCDMA_1900 WPRXSE1 VDDA2_7
36
RX_WCDMA_2100 WPRXSE2 VDDA2_8
VDDA2_9
VDDA2_10
VDDA2_11
RX_WCDMA_2100_LNA_OUT VDDA2_12
RX_WCDMA_1900_LNA_OUT
FL103 UPG2214TK
1 5
WB1900_MIX_INP OUT1 IN
3
WB2100_MIX_INP OUT2
6
VC1
2 4
GND VC2
C53 1.2p
FL104 UPG2214TK
1 5 C54 1.2p
WB1900_MIX_INM OUT1 IN
3
WB2100_MIX_INM OUT2
6
VC1
2 4
C55 C56
GND VC2
22p 120p
R113 1K
SFAC0002001 INTER_RX_SW_1
R115 2.2K R116 1K
GSM_PA_RAMP INTER_RX_SW_2
C58 C59
C63
39p
100p 100p
GSM_PA_BAND GSM_PA_BAND MODE
LOW GSM
GSM_PA_EN
HIGH DCS/PCS
R118
4dB
DCS_PCS_TX
24
R119 R120
220 220
TP102
FL105
LMSM32AA-533
R121 4dB
5 1
RFOUT RFIN GSM_TX
24
7
VC R124 R125
220 220
R128 100ohm
GSM_SAW_SW_MODE EGSM LOW
C75 100p
GSM850 HIGH
Remain LOW state when not transmitting
U105
W850 TX(824 - 849 MHz)
LDC15836M20Q-360 C82
C83 C84
33p
33p 33p
C85
L119
1000p
NA
C91 2.7p
RX_WCDMA_850_P
R133
L120 L121
PDET_IN
NA 10nH 82
R134 R135
C94 2.7p
82 82
RX_WCDMA_850_M
AWT6321R
15
W850 RX(869 - 894 MHz) PGND
14
GND4
10dB
13
RFOUT_CELL
12
VCC
11
VCCA
10
GND3
9
L125 C100
GND2
8
RFOUT_PCS
1nH
33p
C106
SMPY0015801
0.5p
C116 C115 +VPWR_WPAM
RX_WCDMA_1900
C117
33p 33p C118 C119
10u
0.01u 330p
L134 (1608) SKY77170
1.8nH 11
PGND
10
VCC2
9
GND2
8
RF_OUT
7
GND1
W2100 TX(1920 - 1980 MHz)
2.7nH 6
6.8p CPL
SMPY0017801
C128 L139
C133
L143 C134
0.5p
RX_WCDMA_2100
4.7nH
1p
C137
DNI
7 7 8 8 9 9
- 167 -
10 10 11 11 12 12
LGE Internal Use Only
64
RTR_TXIP
63
66
C2
65
68p
5 C7 0.01u
RTR_TXIM
24 C8 0.01u
RTR_TXQP
C10 1000p
9
C13
11
RTR_RXQP 68p
12
RTR_RXQM
14
RTR_RXIP RTR_TXQM
13
RTR_RXIM
15
RTR_DRXQP
16
RTR_DRXQM
17
RTR_DRXIP
18
RTR_DRXIM
19
C23 12p
67
RTR_DAC_REF +2.7V
3
(0)
VREG_RFRX_1
4 R106 2.2
6 R107 10
10
22
53
VDDA1 : Pin 3,4,6,10,22,53 = +2.7V VDC VDD_RX
1
0603
7
VSNS_SMPS
8
R108 0
21 R109 5.1
VRF_SMPS
25 R110 5.1
27 Route together
+2.1V
VDDA2 : Pin 1,7,8,21,25,27,37,43,54,60,61,62 = +2.1V VDC
37
43
54
60
61
62
TP503
VREG_MSMP_2.6V
C57
0.1u
TCXO Circuit
VREG_TCXO_2.85V
C64
C65
1000p
0.1u
X101
C66 100p
4 3
VDD OUT TCXO_PM_19.2MHz
R117
1 2
RTR_TRK_LO_ADJ VCONT GND
100ohm 19.2MHz
C70 1000p
C67 EXSK0005704 TCXO_RTR_19.2MHz
0.01u DSA321SCA
VREG_MSME_1.8V
C71
R122 100K
0.1u
TC7SH04FS
VCC
5
C73 100p R126
1 4
USBH_REF_CLK
33
2
U103 C74
GND
100p
+VPWR_WPAM
+VPWR_WPAM +VPWR
C86
100p C87
10u
(1608)
WCDMA_850_ON
W850
C95 FL108
100p
SAWEP836MFH2F00
U106
L122 L123
C96
9 1
OUT1 IN1 WCDMA_850_TX_OUT
1 2.7nH 3.3nH
VEN_CELL 33p
C97
2 6 4
RFIN_CELL OUT2 IN2 C98
3 L124
VMODE 33p DNI
4 NA 7 2
VBATT GND2 GND1
5 8 3
NC GND4 GND3
C99
6 10 5
RFIN_PCS GND6 GND5
7
33p
VEN_PCS
SFSB0002201
L128
C105
WCDMA_1900_TX_OUT
L127 2.7nH
33p
33p
WCDMA_PA_R0 C109
WCDMA_1900_ON DNI
L132
NA
W1900
C120
FL111
330p
U108
SAFEB1G95KA0F00
1
VCC1
3 C121 L136
L135
C122 33p G3
2 4 1
RF_IN OUT IN WCDMA_2100_TX_OUT
1nH G2 G1
33p 2.7nH
3 5 2
VMODE1
L138
NA C125
4
VMODE0 0.5p
SFSY0028101
5
ENABLE
C129 RF 850, 900, 1800, 1900, 2100
C131
1000p 1000p WCDMA_PA_R0
WCDMA_2100_ON
W2100
10 10 11 11 12 12
LGE Internal Use Only
F F
G G
H H