Circuit Diagram - LG KB770 Service Manual

7. CIRCUIT DIAGRAM

1 2 3
SW101
SW100
C100 56p
R100 0
G2
G2 ANT ANT RF
G1
G1
C101 C104
C102
UFL-R-SMT10 DNI DNI
KMS-512
56nH
A
LMSP4LMA-573TEMP
14
VC1
13
VC2
12
VC3
11
VC4
L107 47nH
10
VREG_RF_SMPS VDD
9
C112 C113 GND1
0.1uF 33p 18
GND2
20
GND3
21
GND4
23
GND5
24
GND6
26
GND7
27
B
GND8
28
GND9
R107 1K
ANT_SEL0
R108 1K
ANT_SEL1
R110 1K
ANT_SEL2
R111 1K
ANT_SEL3
C
ANTENNA SWITCH MODULE LOGIC
LMSP4LMA-573TEMP_Rev B Later
ANT_SEL0 ANT_SEL1 ANT_SEL2 ANT_SEL3
GSM900 TX HIGH HIGH LOW LOW
DCS/PCS TX HIGH LOW LOW LOW
GSM900 RX LOW LOW HIGH LOW
DCS RX LOW HIGH HIGH LOW
PCS RX LOW HIGH LOW LOW
UMTS 2100
HIGH LOW HIGH HIGH
D
GSM/EDGE
E
WCDMA
F FL102
ACMD-7602
4 1
PGND RX
3 2
WCDMA_2100 ANT TX
C153
15p
C
D
C160 5 4
EFCH2140TDE1
1 G2 O2
WLNA_OUT
IN
G1 O1
18p
2 3
3.3nH
C162
E
F
1 2 3
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4 5 6 7
FL100
1
GSM1800RX1
2
GSM1800RX2
3
GSM1900RX1
4
GSM1900RX2
5
GSM900RX1
6
GSM900RX2
7
GSM850RX1
8
GSM850RX2
15
UMTS1
16
UMTS2
22
GSM1800_1900TX
25
GSM850_900TX
17
NC
WCDMA_2100
C117
C116
100p 100p
C119
0.75p
C120
100p
R112 2.2K
L114
C127
NA
68p
C126
10p L117
2.2nH
L116
15nH L118
10nH
C133
100p
C140
DNI
2
DCS_PCS_IN
16 7
DCS_PCS_OUT U101 GSM_IN
SKY77329
9 1
GSM_OUT TX_EN
3
BS
C147 C148 C143
C146
R122 100p 1u 10u
RX_WCDMA_2100
6.8nH
3.3p
C151
2.7nH
LDC151G9520Q-359
GND1 VEN
U103 6 5
GND2 VMODE1
L120
7 4
RFOUT VMODE2
8 3
0
GND3 RFIN
9 2
C155 C156 VCC VBATT
10 1
DNI 1.2p PGND
11
AWT6279R U102
HDET
R124 51
L124
L123
WCDMA_MIX_IN_M
1nH
1nH
FL104
L125
L126
WCDMA_MIX_IN_P
1nH 1nH
4 5 6 7
8 9 10 11
L100
4.3nH
L101 L102
DCS
NA NA
L103
4.3nH
WCDMA_2100_TX_OUT
DCS_PCS_TX
L104
GSM_TX
3.3nH
L105 L106 PCS
2.7nH 18nH
L108 TX_ON
3.3nH
TX_AGC_ADJ
DAC_REF
C115
12p
L109
22nH
L110 L111 EGSM
SSBDT_RTR
18nH 47nH
L112
22nH
GSM_PA_RAMP
+VPWR RX_WCDMA_2100
C130 C128
33p 33u
VREG_RF_SMPS
C131
10u WLNA_OUT
R114
82
DCS_PCS_TX WCDMA_MIX_IN_P
R115
R116 WCDMA_MIX_IN_M
82 82
FL101
EFCH897MTDB1
4 5 R118
51
O1 G3 1
GSM_PA_EN GSM_TX
IN
G2 G1
GSM_PA_BAND
3 2 7.75dB
R119 R120
110 110
+VPWR
FL103
EFCH1950TDF1 L121
4 5
2.2nH
R123
O1 G3 1
IN WCDMA_2100_TX_OUT
G2 G1
0 C157
C154
3 2
100p DNI
L122
NA
PA_R1
C158
100p
PA_ON
C159
100p
8 9
- 157 -
12 13 14 15
TX_IP
C103
180p
C105
180p
55 2
OPEN GND5 TX_IM
1
C106 6p GND4
46
HB_RF_OUT1 TX_QP
44 51
HB_RF_OUT2 TX_IP C109
C107 6p 50
TX_IN 180p
C108 4p 43 53
LB_RF_OUT1 TX_QP
42 52
LB_RF_OUT2 TX_QN C110
180p
24 7
RF_ON TCXO RTR6275_TCXO TX_QM
C111 3300p
56 5
VCONTROL VTUNE1
C114 1000p
18
VTUNE2
54
DAC_REF
VTUNE-Connected directly to GND
12
RX_IP RX_IP
U100
14 13 R101
SBDT RX_IN RX_IM
(1%)
RTR6275 R104
R102 12K 3 10
110
R_BIAS1 RX_QP RX_QP
27 11
R_BIAS2 RX_QN RX_QM
R103 680
(1%) 40
PWD_DET_IN
31 21
GCELL_INP TEST
30
GCELL_INN
4 R106 5.1
L113
VDDA1
47nH
32 6
EGSM_INP VDDA2
33 8
EGSM_INN VDDA3
9 R109 2.7
VDDA4 C118
38 15 2.2u
DCS_INP VDDA5
39 16
DCS_INN VDDA6
19
VDDA7
36 20
GPCS_INP VDDA8
37 28
GPCS_INN VDDA9
41
VDDA10
22 45
GND1 VDDA11
23 47
GND2 VDDA12
48
VDDA13 C129
26 49
WLNA_IN VDDA14 0.1u
R113 10
L119
1nH
C132
2.2u
R117
100ohm
VREG_MSMP_2.7V
C142
C141
0.01u 22p
TCXO
VREG_TCXO_2.85V TG-5010LH_19_2M_75A
OUT GND
3 2
C144 VCC VCONT
4 1
0.1uF
C145 X100 19.2MHz
33p
C150 100p
TCXO_PM
C152 1000p
RTR6275_TCXO
TCXO_BT
16
A
56
HDET
R105
110 B
VREG_RF_SMPS
L115
47nH C
VREG_SYNTH_2.6V
VREG_RF_SMPS
D
E
R121
100ohm
TRK_LO_ADJ
F
C149
0.01u
C
D
E
LGE Internal Use Only