General Description - LG KF510C Service Manual

3. TECHNICAL BRIEF
BB Part
PMB887
26MHz_MCL
(S-GOLD3
I/I
Q/Q
TXON_P
PA
PA_BAND
Cont ro
PA_LEVEL
Hardwar
MOD
ANT_SW
GS
ANT_SW
Timer
RF_E
RF
RF_D
Uni
RF_CL
VCTCX
AF
VBAT
2.85
PMB682
BT_CL
(SM-Power
26MHz_MCL
RF1.5
RF2.85

3.20 General Description

The RF transceiver (PMB 6272 SMARTi-PM) is an integrated single chip, quad-band transceiver for
GSM850/GSM900/GSM1800/GSM1900 designed for voice and data transfer applications. The
transceiver provides an analog I/Q baseband interface and consists of a direct conversion receiver and
a quad-band polar transmitter for GSM and EDGE with integrated PGA functionality. Further on a
completely integrated SD-synthesizer with HSCSD and GPRS/EDGE capability, a digitally controlled
reference oscillator with three outputs, a fully integrated quad-band RF oscillator and a three wire bus
interface with all necessary control circuits complete the transceiver.
LGE Internal Use Only
PMB6272(SMARTi
AD
3-Wir
Sigma-Delt
Bu
Modul ato
inte rfac
26MH Fracti ona
N-PL
Loo p
RF2.85
Figure 30 KF510 RF block diagram
RF Part
LN
900MH
/
1800MH
1900MH
/
PG
Pola
Mod ulato
3.8GH
VSUPPL
RF1.5
Copyright © 2008 LG Electronics. Inc. All right reserved.
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RF2.8
FEM(LSHS-C085FB
SAW
T
Switc
R
R
VC
Deco de
VC
T
T
SKY7734
TXON_
A
PA_LEVEL
PA_BAND
MOD
Only for training and service purposes