Text preview for : LG U880.pdf part of LG U880 LG Mobile Phone LG U880 LG U880.pdf
Back to : LG U880.pdf | Home
7. CIRCUIT DIAGRAM
ANT1000
ANT1001
ANT_SEL2 ANT_SEL1 ANT_SEL0 GSM_PA_BAND MODE
TX_VCO_EN_0_N TX_VCO_EN_1_N
GSM 900 TX LOW LOW HIGH LOW GSM
DCS/PCS GSM900 HIGH LOW
GSM 900 RX/WCDMA LOW LOW LOW HIGH
DCS1800/PCS1900 TX HIGH HIGH LOW DCS1800/PCS1900 LOW HIGH
SW1002
C1230 G2
ANT RF DCS 1800 RX LOW HIGH LOW
G1 OFF HIGH HIGH
15p PCS 1900 RX HIGH LOW LOW
KMS-512
L1035 L1034 C1112
4.7nH 15nH 0.5p C1111 33p
L1032 3.3nH
L1023
2.2uH
DAC_REF
M054E
150p
U1006
7
TX_IM
L1022
L1031 7.5nH
2.2uH
FXL4T245BQX U1008 L1018
ANT
1 9 2 12 3.6nH
VREG_RFRX_0_2.85V VCCA _OE CTRL1 RX_DCS1
C1096
14 4 13
VCCB CTRL2 RX_DCS2 TX_IP
L1024
2.2uH
6 11 14
C1108 T__R CTRL3 RX_PCS1
7 20 15 1930-1990 MHz
0.1u GND1 CTRL4 RX_PCS2 C1088
8 16
150p
GND2 RX_EGSM1 1000p TX_QM
L1021
2.2uH
15 17 L1019
BGND RX_EGSM2
3.6nH
C1095
13 2 8 3 L1033 3.3nH
ANT_SEL0 12
B0 A0
3
UMTS TX_DCSPCS
1
TX_QP
ANT_SEL1 11
B1 A1
4
GND6 TX_EGSM
GND5
GND4
GND3
GND2
GND1
ANT_SEL2 10
B2 A2
5
VREG_RFTX_2.85V
B3 A3 R1022
C1093 VREG_RFTX_2.85V
L1020
19
18
10
9
6
5
47nH
33p 10
C1091
L1029 5.1nH VREG_RFRX_0_2.85V 0.1u
L1008
C1094
47nH
C1089
0.1u
33p
L1016 VREG_SYNTH_2.85V
C1050
C1052
7.5nH
0.1u
L1009
33p
28
27
26
25
24
23
22
21
20
19
18
17
16
15
47nH
GSM_PA_RAMP
FAQ2
VDDA8
VDDA7
GSM1900_INP
GSM1900_INN
VDDA6
GSM850_INP
GSM850_INN
DAC_REF
TX_IN
TX_IP
TX_QN
TX_QP
VDDA5
1805-1880 MHz