LG GX500 Service Manual page 66

GX500 Operational Description
C407
0.1U
LBAND_PAM_IN
HBAND_PAM_IN
Figure 3-31 RF PAM TQM7M5005H schematic
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
GSM850 GSM900
C409 C412 C426
C423 4.7P 4.7P 3.3p
4.7N
FE1
FE2
FE2
33
VBIAS
34
VDDTX1V5
35
TX1
36
TX2
37
VDDTX2V8
R405
38
VDDMIX2V8
10
39
C432
GND3
40
0.22U
GND4
41
R401
10
C413 C438
220N 0.1U
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3. TECHNICAL BRIEF
DCS1800 PCS1900
C421
C431
C435 C408 C427
3.3p
2.2P 2.2P 2.7p
2.7p
C430
0.1U
VDDRX2V8
20
VDDRX1V5
R402
19
VCO_RC
820
18
VDDVCO2V8
17
EN
16
VDDXO2V8
15
FSYS1
14
GND1
13
X401
4 3
1 2
26MHz
DSX321SG-26M
TP401
TP402
Revision A
C416 C411
0.1U 0.1U C442
0.1U
RF_CLK
RF_DA
QX
Q
IX
I
LGE Internal Use Only