Service Manuals, User Guides, Schematic Diagrams or docs for : LG Mobile Phone LG U8120 LG U8120
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9. CIRCUIT DIAGRAM
1 2 3 4 5 6 7 8 9 10 11 12
A A
C1012
22p
RX
ANT
WCDMA_TX TX WCDMA_RX
N1002
G4
G3
G2
G1
DFYK61G95LBNCB
B B
W1001
KMS-507 C1000
C1013 3.9p
GSM_TX
G2
RF
G1
ANT ANTPAD
22p
DCS_TX N1000
8 LMSP54MA-213 L1001 L1002
12 14 6
6.8nH 6.8nH
ANT
GSM900_RX GSM1800_1900_TX
GSM900_TX
WCDMA
15 9
GND2 VC2
13 10
GND1 VC1
5
GND5
7 GND4
V1001 3 11
GSM1900_RX
VDD
GSM1800_RX
GND3
RN47A4
VCCB
VCG
3
4
R1002 16 4 2 1
C C1010 NA C
1000p C1011
2
R1007 22p
DCS_RX
51
1
5
GSM_RX
R1001 R1006
ANTSW3
NA 0
R1005
ANTSW2
0
R1004
ANTSW1
0
R1003
ANTSW0
0
D D
C1007 C1001 C1009 C1002 C1008 C1003 C1004 C1005
0.01u 10p 10p 0.01u 10p 0.01u 0.01u 10p
E R1810 E
VDD_A VCCA
0
R1811
VDD_B VCCB
0
C1810 C1811 C1802
10u 10u 10u
2012 2012 2012
N1800
LP2985AIBP-2.8
R1804 5 1
EXTLDO ON_OFF GND
NA
2
F BYPASS F
R1800 4 3 R1801
VIN VOUT
NA NA
NA
VBATI
C1800
0.1u C1801
1000p
R1825
V_wivi_A
R1851 0
0 R1826
1
N1850 LP3981ILD-2.8
6
V_wivi_B
VOUT VEN 0
R1850 2 5
G VIN BYPASS G
0
3 4
VOUT_SE GND1
7 GND2
C1850 C1852 C1851
0.1u 10u 0.033u
2012
H Engineer:
H
SG Kang LG ELECTRONICS INC.
Drawn by: 3G HANDSETS LAB.
SG Kang DEVELOPMENT GROUP 1
R&D CHK: TITLE: Size:
A2
DOC CTRL CHK: ANT SW to ANT 12 1 8 A
MFG ENGR CHK: U8120 PT V1.3 STG INTEL PAM
Changed by: Date Changed: Time Changed: QA CHK: REV: Drawing Number: Page:
SG Kang Tuesday, September 04, 2003 5:01:55 pm 1
1 2 3 4 5 6 7 8 9 10 11 12
CIRCUIT DIAGRAM
1 2 3 4 5 6 7 8 9 10 11 12
A A
Z1420
TMX-M453
6 1
IN- IN+
5 2
SHIELD GND
4 3
OUT+ OUT-
C1441 C1442
2200p C1443 2200p
1.2p
B L1441 B
100nH
1608
C1453
VCCB RXQA
0.01u C1454
RXQB
0.01u C1451
C1422 C1423 RXIA
27p 27p 0.01u C1452
RXIB
0.01u R1760
R1401 R1410 R1440 C1421
0
MCLK
0 0
0
NA L1760
L1422 1uH
C1761
68nH
82p
C C
1608 C1760
0.01u
C1448 C1447
0.01u 0.01u
L1421 R1411
68nH 3.3K
R1430
1608 VCCB
C1403 C1404 C1414 C1425 C1424 10
2200p 22p
22p 0.01u 22p C1431
22p
C1444
22p C1777 C1772 R1771 R1770
A10
VCXOCONT
A1
A2
A3
A4
A5
A6
A7
A8
A9
C4
C5
C6
C7
47p 330p 10K 1K
IFOUT
GNDMIX
VCCIF
IFINA
IFINB
VCCLF
QRA
QRB
IRA
IRB
CDQ
CDI
GNDLF
MCLK
C1776 C1773 C1770
4.7p 4.7p V1770 0.01u
B1 B10
IFOUTB VCCREF B1770 BBY58-02W
C1 C10 TSX-8A
VCCMIX XOIA
D1 D10 4
C1778
MIXINA XOIB 3 HOT2 GND2
E1 E10
D F1
MIXINB VCCBUS
F10
2 GND1 HOT1 1 D
GNDBIAS IFLOA 13MHz 56p
G1 G10
C1401 GNDEME IFLOB R1772
H1 N1400 H10
WCDMA_RX J1
RFIN
LZT-108-5323
GNDRFLO
J10
10K
22p GNDBYP RFLOOA
K1 C8
VCCRF XOOA
C3 D8
GNDIF XOOB
L1401 D3 E8
DATA GNDREF
2.2nH E3 F8
C1400 L1411
F3
CLK GNDBUS
G8
IFLO
NA STROBE REFON
G3 H8
6.8nH GLNA GNDVCO IFLOBAR
GNDTUNE
VCCRFLO
C1402 C1750 22p
GNDPHD
VCCVCO
VCCPHD
PHDOUT
RFLOOB
GNDPLL
VCCPLL
INDBYP
XOOON
RFLO
RFOUT
VTUNE
1000p C1412 C1413
RXON
1.2p 1.2p R1505
K2 NA C1751 22p
K3
K4
K5
K6
K7
K8
K9
K10
H3
H4
H5
H6
H7
RFLOBAR
XOOA
5
4
6
Z1400
O2
G3
O1
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