Only For Training And Service Purposes - LG KF350 Service Manual

3. TECHNICAL BRIEF
2V85_VRF
1V5_VRF
C431
0.1u
LBAND_PAM_IN
HBAND_PAM_IN
1V5_VRF
R412
10
Figure 25 RF transceiver PMB6272 SMARTi-PM schematic
LGE Internal Use Only
GSM850 GSM900 DCS1800
2V85_VRF
C423 C424 C425
C426
2.2p 2.2p
2.2p
2.2p
C432
4.7n
L401
L400
18nH
18nH
FE2
33
VBIAS
34
VDDTX1V5
35
TX1
U401
36
TX2
PMB6272
37
VDDTX2V8
38
VDDMIX2V8
39
R411
C440 GND3
40
10
220n
GND4
41
2V85_VRF
C443 C444
220n 0.1u
PCS1900
C427 C428 C429 C430
2.2p 2.2p 2.2p 2.2p
L402
L403
6.8nH
5.6nH
1V5_VRF
C433
0.1u
VDDRX2V8
20 C437
VDDRX1V5
19 R410 47n
VCO_RC
18 820
VDDVCO2V8
17
EN
16
VDDXO2V8
15
FSYS1
14
GND1
13
X400 NX3225SA
4
3
GND2 HOT2
1 GND1 2
HOT1
26MHz
BT_CLK
RF_CLK
RF_DA
QX
Q
IX
I
Copyright © 2008 LG Electronics. Inc. All right reserved.
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2V85_VRF 2V85_VRF
C434 C435 C436
0.1u 0.1u 0.1u
RF_EN
C439
26MHZ_MCLK
1000p

Only for training and service purposes