LG GS290 Service Manual page 54

GS290 Operational Description
LBAND_PAM_IN
HBAND_PAM_IN
C511
Figure 24 RF transceiver PMB6272 SMARTi-PM schematic
LG Electronics
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
VC1
VC2
FE2
33
VBIAS
34
VDDTX1V5
35
TX1
36
TX2
37
VDDTX2V8
R507
38
VDDMIX2V8
10
39
C522
GND3
40
220n
GND4
41
VRF_1V5
VRF_2V85
C518
220n 0.1u
C506
0.1u
VDDRX2V8
20
VDDRX1V5
19
U500 VCO_RC
18
VDDVCO2V8
PMB6272 17
EN
16
VDDXO2V8
15
FSYS1
14
GND1
13
X500 TSX-3225
4
3
GND2 HOT2
1 2
HOT1 GND1
26MHz
CLK26M
RF_CLK
RF_DA
QX
Q
IX
I
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Revision B
3. TECHNICAL BRIEF
VRF_1V5 VRF_2V85 VRF_2V85
C537 C536 C535
0.1u 0.1u 0.1u
C516 1n
C517
R508
47n
820
LGE Property
LGE Internal Use Only
RF_EN
26MHZ_MCLK