Circuit Diagram - LG L705i Service Manual

7. CIRCUIT DIAGRAM

1 2 3
VREG_TCXO_2.85V
GND100 ANT
ACT_N
L503 C100 U100
2.7nH
9p
3 4
OUT2 VCONT
C102
56p
2 5
GND IN ANT
C602 R108
1 6
1p NA SW100
OUT1 VDD
KMS-507
UPG2010TB-E3 ENWY0003301
A
EUSY0207001
C111 C112
NA 47pF
RF_OUT
R106
51
Chip - 0603
R111
ANT_SEL0 R112
B ANT_SEL1 1K R113
ANT_SEL2 1K
1K
C121 C122 C123
33p 33p 33p
C133 C134
68p C137
68p
68p
WCDMA_800
WCDMA_2100
C135 C136
68p 39p
C148 L117
L112 L113
NA NA
NA 5.6nH
C
L114 C150
15nH 56p
FRONT END MODULE LOGIC
CTRL1 CTRL2 CTRL3
EGSM TX HIGH LOW HIGH
DCS/PCS TX LOW HIGH HIGH
EGSM RX HIGH LOW LOW
DCS RX HIGH HIGH LOW
PCS RX LOW HIGH LOW
UMTS 1 LOW HIGH HIGH
UMTS 2 HIGH LOW HIGH
D
GSM/EDGE
WCDMA
U103
WCDMA_2100 SCDY0003403
CP0402A1950DNTR
FL103
SAYZY1G95EA0B00
E
C604
C173
5.6p
10p
W2100_RX
R129
47
L506
1nH
FL106
EFSD836MF2S2
6 1
WCDMA_800
ANT TX
L501
3 82p
RX
L128
L502
2 9 8.2nH W800_RX
2.7nH
GND1 GND6
4 8
GND2 GND5
C185
5 7
F GND3 GND4 NA U105
CP0402A0836BNTR
SCDY0003401
L135
6.8nH
G
FL107 C192
EFCH881MTDAA
C195 4p
SFSY0030101
5 4
82p
1 G2 O2
IN
G1 O1 L136
NA
2 3
C199
C198
NA 4p
H
1 2 3
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4 5 6
C103
56p
G2
RF
G1
L103
56nH
FL100
DGM099M01
9 1 2
PCN_PCS_TX PCN_RX1
11 13
GSM850_EGSM_TX PCN_RX2
14
PCS_RX1
20 15
WCDMA2100 PCS_RX2
21 16
WCDMA850 EGSM_RX1 R607
22 17
WCDMA1900 EGSM_RX2
18
GSM850_RX1
4 19
CTRL1 GSM850_RX2
5
CTRL2
6 7
CTRL3 VDD VREG_RF_SMPS
0603 0603
C119 C120
0.1u 33p
+VPWR
C130 C125
0.01u 10u
C138
8p
C131 C132 R116
NA NA 10 C142
0.01u
0603 C139
10u
C141
0.01u
C152
68p
L115 C151
0603
3.9nH 68p
15 3
DCS_PCS_OUT DCS_PCS_IN
11 4
EGSM_OUT EGSM_IN
U102 R119
19 18 100 0603
RSVD_GND SKY77318 ENABLE GSM_PA_EN
SMPY0014001
21 1
P_GND BS GSM_PA_BAND
R123 0603
100
4 5
O1 G3
IN
C161 C162 G2 G1
10p 10p
3 2
0603 0603
FL102
EFCH897MTDB1
SFSY0030201
C163
68p
+VPWR C165
1000p
C166 C167 C164
0.01u 120p 4.7u
C169 L122
1.2p NA
U104
AWT6277R
11
GND5
L505
10 1
VCC2 VCC1 2.2nH
9 2
GND4 RFIN
8 3
RFOUT GND1
7 4
GND3 VMODE L126
6 5
GND2 VREF NA
C178
0.1u
0603
U106
AWT6307R
8 1
GND1 VEN PA_ON1
C603 L504
68p 1.5nH
7 2 R130 0
RFOUT VMODE PA_R0 C183 C184
0603
68p 12p
6 3
GND2 RFIN
5
C182 VCC
9 4
NA
BGND VBATT +VPWR
L129
18nH
C187 C186
68p
10u
R131
PWR_DET
75
R132 R133
100ohm 100ohm
RFR6275
U107
L132 R134 EUSY0300401
33nH 1.5K
17
RX_QP
14 18
W800_RX LB_LNA_IN RX_QM
10
LB_LNA_OUT
19
L133 RX_IP
5 20
1.2nH
LB_INP RX_IM
4
LB_INM
27
C191
GRX_QP
100p
15 28
HB_LNA_IN GRX_QM
0603 9
L134
HB_LNA_OUT
15nH 29
GRX_IP
7 30
HB_INP GRX_IM
6
HB_INM
45
C196 TCXO
100p 32
GPS_PLNA_IN
L137 0603 35 41
GPS_PLNA_OUT GPS_CP_OUT
15nH 47
UMTS_CP_OUT
37
GPS_INP
38 12
GPS_INM NC1
L138 (1%) 43
NC2
R136 11.8K
1.2nH 2 44
R_BIAS NC3
R137 5.62K
13 1
R_BIAS_UMTS VDDA1
3
VDDA2
(1%)
33 8
R_BIAS_GPS VDDA3
11
VDDA4
16
VDDA5
23 21
SSBDT_RFR SSBI VDDA6
34 26
BLANK VDDA7
31
VDDA8
24 36
GND VDDA9
49 39
GND_SLUG VDDA10
R140 40
VDDA11
47 22 42
VREG_MSMP_2.7V VDDM1 VDDA12
0603 25 46
C210 VDDM2 VDDA13
48
100p VDDA14
0603
4 5 6
7 8 9
L100
18nH
EGSM RX
L101 L102
NA NA
U101 RTR6275-CHARTERED
L104
C105 6p
18nH 46
W2100_TX_OUT DA_HB1_OUT
C106 6p 44
L105 DCS_PCS_TX DA_HB2_OUT
C107 5p
4.7nH 43
DA_LB1_OUT
GSM_TX
C110 12p 42
DCS RX
W800_TX_OUT DA_LB2_OUT
L106 24
NA
TX_ON RF_ON
NA 56
TX_AGC_ADJ VCNTRL
54
DAC_REF DAC_REF
L107
C117
14 EUSY0300502
12p SBDT
4.7nH
(1%)
R109 12K 3
R_BIAS1
27
R_BIAS2
R110 680
L108 (1%)
SSBDT_RTR
30
GCELL_INN
4.7nH 31
GCELL_INP
32
C118 22p
EGSM_INP
PCS RX 33
EGSM_INN
38
C124 DCS_INP
L110
39
0.5p DCS_INN
NA 36
GPCS_INP
37
GPCS_INN
L111
4.7nH 26
W2100_RX WLNA_IN
21
TEST
55
OPEN
C149 L116
6p 1.2nH
FL101
C153
2 3 SAFEB2G14FA0F00
6.8nH G1 O1 L118
1
IN
R118 G2 O2 NA
39
5 4
DCS_PCS_TX
C155 L120
L119
6p 1.2nH
0.5p
R120 R121
130 130
L121
1.5nH
R124
30
1
GSM_TX
R125 R126
180 180
Q100 Blocking Cap : place to RF Chip
KRX102E
EQBA0000602 TCXO
Chip - 0603
PA_ON0
X100
C168 1000p
VREG_TCXO_2.85V TCXO_PM OUT
3
C170 1000p
FL104 RTR6275_TCXO VCC
SFSY0028101 4
C171 1000p
SAFEB1G95KA0F00
L123 RFR6275_TCXO
3
5.6nH
G3
4 1
W2100_TX_OUT
OUT IN
G2 G1
VREG_TCXO_2.85V
5 2
C174 L124
NA NA C176 C177
0.1u 1000 pF
L130
4 5
3.3nH
O1 G3
1
IN W800_TX_OUT
G2 G1 FL105
EFCH836MTDB1
3 2
SFSY0030301
C188 L131
NA NA
0603
C189 C190
47pF 0.1u
RX_QP
RX_QM
RX_IP
RX_IM
RFR6275_TCXO
R135
C194
C193
10K 2.2n PPS
150p
1608
C197
10n
0603
L139 L140
47nH 47nH
VREG_RF_SMPS
C200 C201
C202 C203 C204 C205 C206
2.2u 2.2u
33p 33p 33p 0.1u 33p
1005 1005
R138 0
C207 C208 C209
R139 10
100p 22p 100p
Chip - 0603
C211 C212
22p 22p
7 8 9
- 149 -
10 11 12
TX_IP
C101
180p
C104
180p
TX_IM
TX_QP
C108
51
TX_IP 180p
50
TX_IN
53
TX_QP C113
52
TX_QN 180p
TX_QM
7
TCXO RTR6275_TCXO
5
V_TUNE1
C114
12
3300p
RX_IP RX_IP
13
RX_IN RX_IM
10
RX_QP RX_QP
11
RX_QN RX_QM
40
PWD_DET_IN PWR_DET
L109
4
VDDA1 VREG_SYNTH_2.6V
6 47nH
VDDA2
8
VDDA3
9
VDDA4
15
VDDA5 C129
16 10u
VDDA6
19
VDDA7
20
VDDA8
28 1608
VDDA9
49
VDDA10
48
VDDA11
47
VDDA12
45
VDDA13
41
VDDA14
R114 2.7
17
VDDM
R115 5.1
VREG_MSMP_2.7V
R117
100ohm
C154
100p
VREG_RF_SMPS
R122
10
C159 C160 C156
10u
C157 C158 22u 100p
22p 0.1u 2012 1608
Thermistor Circuit
=> Using RTR Internal Therm
TG-5010LH_19_2M_75A
EXSK0007802
19.2MHz
GND
2 R127
100
VCONT TRK_LO_ADJ
1
C172
0.01u
10 11 12
LGE Internal Use Only
A
B
C
D
E
F
G
H