LG W3000 Service Manual

GSM Phone
SERVICE MANUAL
MODEL : W3000
P/N : XXXXX JUNE, 2002
SERVICE MANUAL MODEL : W3000
ANT S/W
CX74017
Base Band
Block
DCS : 1805 ~ 1880MHz
GSM : 925 ~ 960MHz
90
0
90
0
2/3
RXIP RXIN
RXQP
RXQN
4/3
PCS : 1805 ~ 1880MHz
f
vco
GSMSEL DCSSEL
LMSP54AA-097
FAR-G6CS-1G8425-L257
ANT S/W
GSM
TXVCO
PAM(RF3110)
CX74017
Base Band
Block
DCS : 1710 ~ 1785MHz
GSM : 880 ~ 925MHz
90
0
LF
TXIP TXIN
TXQP TXQN
PFD
/D2
/D1
X2
DCS
f
vco
/3
X2
f
TX
f
IF
f
LO
GSMSEL
DCSSEL
TXPA
TXRAMP
BANDSEL1
LMSP54AA-097
=
VCOfVCO
f
GSM
REFCLK
CX74017
Base Band
Block
13MHz
Fractional-N
PLL
X2
DCS
/R
f
vco = (N+3.5+FN/2^22)fref/R
f
vco
f
ref
/3
LF
f
LO
AFC
13MHz
2V7_VTCXO
GSM
DCS
4/3 2/3
VC-TCXO-208C
1
5
4
3
CTL
GND OUT
VCC
23
SN74AHC1GU04DCKR
2V7_VTCXO
0R
15k
1n
1n
AFC
42
2.2u
(2012)
1M
1k
13MHz
FREF
ADP3330_2V85
OUT
IN
/ERR
/SD
NR
GND
1
2
3
6
5
4
10u
(2012)
0R
470p
RF2.85V
2.2u
VSYNTHEN
VBAT
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