LG U8550 Service Manual page 230

8. CIRCUIT DIAGRAM
1 2 3
A
WCDMA_TX
N303
ESI-3EAR1.950G01-T
B
VCCWPA
N302
RF9266
C
GND5
12
GND6
13
GND7
14
VCC21
15
C308 VCC22
16
0.01u
GND8
17
VCC11
18
VCC12
19
C311 C310
10p 0.1u
D
E
B301
V_wivi_A V+ VO RTEMP
4 3
GND1
2
GND2 NC
5 1
LM20BIM7X-NOPB
F
V_wivi_A
V_wivi_B
G
H
1 2 3
4 5
R308
VDETECT
8
VBATI
VCC_DET
7
C312
GND2 22p
6
R307
VCC_BIAS2
5
0
VCC_BIAS1
4
GND1
3
VCTRL2
2
R306
WPAREF
VCTRL1
1
0
C309
RFLO
22p
RFLOBAR
V_wivi_A
C314 C322
0.01u 0.01u
C307 G3 G2 G1
33p I2
6 L308
O I1
2 4 10nH
SAFEH1G95FL0F00R05 FL301
R304 R305
NA NA
R315
680
L311
15nH
R317
0
L310
C328
47p
15nH
R314
680
R312
0
4 5
6 7 8
VBATI
N301
WDCDCREF
MAX1820ZEBC
A1 B1
_SKIP SYNC
A2 C1
COMP _SHDN
A3 C2
OUT BATT
0
A4 C3
R301 REF LX
33K
B4 C4
GND PGND
C302
22p
C301
330p
C318 C333
100p 100p
L306
NA
C319
4.7p
L305 BLM15BB750SN1J R310 R311
75
0 0
C315
C323 C325 C324
10p
10p 0.01u 10p
L307 L309
5.6nH 5.6nH
C326
10p
C320
33p
J2 A1
OUT QINBAR
J3 A2
OUTBAR QIN
J4 A3
C321
GNDRF INBAR
J5 A4
MIXOUT IN
J6 A5
33p MIXOUTBAR VCCBB
J7 A6
VCCIF VCCIFPHD
N304
J8 A7
IFBP PHDIFOUT
LZT-108-5322
J9 A8
IFBPBAR VCCIFPLL
J10 A9
VTUNERF GNDIFVCO1
H3 A10
C316 GNDRFLO2 VCCIFVCO
H4 C4
22p
GNDRF1 CLK
H5 C5
GNDRF2 GNDIFPHD
H6 C6
GNDRF3 GNDIFPLL
H7 C7
GNDIF WON
C327
4p
R313 R318
0
4.7K
C329 C334
NA 150p
6 7 8
231
9 10 11
3838
L304
R303
4.7uH
39K
C303 L301
C304
10u R302
10u 2012 C305 C306
2012
L303 100K
10u 2012 1000p
L302
R309
10
C317 C313
22p 0.01u
R319
0
TP302
C331 C332 TP301
22p 0.01u
TP303
TP304
TP305
TP306
C330
22p
R320
10
C335 C337
22p 0.01u
C336
3300p
Engineer:
JS Joo
Drawn by:
JS Joo
R&D CHK:
DOC CTRL CHK:
MFG ENGR CHK:
Changed by: Date Changed: Time Changed: QA CHK:
SG Kang 2004, May 16 5:04:02 pm
9 10 11
12
A
B
VCCWPA C
WPOWERSENSE
IFLOBAR
IFLO D
V_wivi_B
V_wivi_A
E
XOOA
XOOB
TXQB
TXQA
TXIB
TXIA
F
V_wivi_B
WDAT
WCLK
WSTR
G
H
LG ELECTRONICS INC.
Mobile Handsets R&D Center
HW Group, Development Lab 6
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TITLE:
U8550-spfy0106301-1.1 A2
12 1 8 A
UMTS TX (WIVI) to ISOLATOR
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