Rf Part - LG G3100 Service Manual

8.4 RF Part

1 2
ANTENNA
OUT401
A
GND
L413
27p
CN401 C417
12p
KMS-502
B
C425
22p
12
C427
VCC2
12p
11
DCS_OUT
FL401
8 LMSP54AA-097
L403 L412 U402
ANT 10
NC 10nH RF3110
VCC_OUT
4
3
GND1
DCS_TX
6
5 9
GND2
EGSM_TX
GSM_OUT
7
GND3 L405
9
GND4 4.7nH 8 VCC1
12
1
GND5
DCS_RX
13 10
GND6 EGSM_RX
L406
C433
NC
1p
2 11
C
L409 L410
2.7nH 0
DCSSEL
C445
FL402
10p
FAR-G6CS-1G8425-L257
1
IN1
GSMSEL
3
C448 IN2
G4 G3
27p
C451 C452
1.5p NC
D
GSMSEL DCSSEL
EGSM H L
DCS L H
RF2.85V
E
TEMPSENSE
C458
10u
2012
1 2
LGIC(42)-A-5505-10:01
3 4 5
R401
15K
TX_RAMP
C402
39p
R403
0
RF2.85V
C406
1000p
R404
100
TXPA
C407 EGSM
27p
DCS
R405
100
BANDSEL1
C408
27p
VBAT
L401
7dB Atten.
10nH
R408 R406
R409
130 47
130 R410
C418 C419 C420 C421 510
12p 47p 47p 10u
2012
R411 R412
390 51
4dB Atten.
1
L402
R415 R414
R416
DCS_IN 1.5nH
180 33
2
180
BAND_SELECT
3
TX_ENABLE
4
VBATT
L404
5
150nH
VREG C432
1608
47p
VRAMP
6
GSM_IN
RF2.85V
7
R421
390 R420
10
R422
C436
1%
1n 1K
1608
C441
COG
12p
L408
10nH
C444
1.2p
7
OUT1 L411
3.3nH
5
OUT2
G2 G1
C450
0.5p
RF2.85V VBAT
U404
1 6
OUT _SD VSYNTHEN
3 2
_ERR IN
5 4
C457
NR GND
R430
2.2u
0
ADP3330
2012
C459
470p
3 4 5
6 7
RF2.85V
R402
10
C403 C404
22p 0.1u
BANDSEL1
L
RF2.85V
H
C413 C412
33p 10p
C422
1.8p
1
TxDCSPCS
2
TxVCOTune
TP403 3
RX_EN
RXEN
TP405 4
TX_EN TxEN
5
BANDSEL1 TP407
PCO1
6
PCO2
7
TXBYPASS
8
VCC1
9
TxCPO
U401
10
TxINP
11
CX74017
LNAGSMIN
12
GNDLNAGSM
13
LNADCSIN
14
TP410 FEENA
15
LNAPCSIN
16
NC6
17
NC7
C434
C435
10p
0.1u
L407
1608
82nH
COIL
C446
22p
C447
0.1u
2V7_VTCXO
X401
13MHz
GND VCC
C456
R424 2
1000p
15K
AFC CTL OUT
1
Section
Designer
Checked
Approved
Iss. Notice No. Date Name
LG Electronics Inc.
- 118 -
8 9
C401
100p
C405
100p
RF2.85V RF2.85V
C411
0.1u
C409
22p
C410
0.1u
TP401
C414
10u
C415
2012
1u
R407
1608
5.6K
RF2.85V
C423
220p
RF2.85V
49 R413
UHFBYP C424
48 2.2K
VDDBB 680p
TP402
47
PLL_LE
LE
TP404
46
CLK PLL_CLK
C426
45 TP406
PLL_DATA
DATA 8200p
TP408
44
2012 FILM
LDMUX R417
TP409
43
SXENA PLL_PD 10
42
VCCFNCP
41 C428
UHFCPO
C430
40 0.1u
GNDCP C431 22p
39
GNDFN 10p
38
FREF
RF2.85V
37
VCCF
36 RF2.85V
VCCD
35
GNDD
34
NC4
33
NC5 R418 R419
10 10
G1
GND1
C439 C440
C438 C437
0.1u 0.1u
22p 22p
R423
39K
1%
RF2.85V
T_H
TXQN
C449
100p
TXQP
TXIN
C453
100p
TXIP
C454
2.2u
2012
U403
SN74AHC1GU04DCKR
C455
4 5 R425
1000p
100
2 VCC 4
13MHZ
IN OUT
3
GND
3
R426 1M
Date Sign & Name
MODEL G3100
07/28
2003
DRAWING
RF Circuit
NAME
DRAWING
SPFY0060901_1.1
NO.
10
RXIP
RXIN
RXQP
RXQN
A
B
C
D
Sheet/
Sheets
4/4
LG Electronics Inc.