EGSM
Date
Approved
8
Checked
H
2012
2
E
DRAWING
MODEL
D
B
Sheet/
3
1
DCS
H
1%
Iss.
4
1
Sheets
6
LGIC(42)-A-5505-10:01
C
A
NO.
DRAWING
Date
B
DCSSEL
3
A
L
5
07/28
G3100
4/4
RF Circuit
7dB Atten.
7
Designer
EGSM
4dB Atten.
LG Electronics Inc.
Name
1608
9
L
D
H
DCS
Sign & Name
2
NAME
SPFY0060901_1.1
BANDSEL1
L
C
GSMSEL
10
Notice No.
4
Section
5
LG Electronics Inc.
ANTENNA
130
R409
2003
C424
680p
15K
R424
27p
C408
C440
0.1u
GND
NA
L414
C482
0.5p
C417
12p
10p
C434
TP409
10
R419
NC
R428
C405
TP401
100p
1000p
C406
TP410
12p
C418
C452
NC
C436
C456
COG
1608
1n
1000p
10u
C414
2012
C419
47p
12p
C427
100
R425
NC
R431
RF2.85V
RF2.85V
RF2.85V
1.2p
C444
C432
47p
0.1u
C439
10
R417
L413
27p
L402
1.5nH
TP407
R422
1K
27p
RF2.85V
C407
C404
C403
22p
0.1u
2012
L401
10nH
G1
G2
RF
C454
2.2u
51
R412
CN401
KMS-502
ANT
1608
82nH
L407
ADP3330
U404
4
GND
2
IN
NR
5
OUT
1
_ERR
3
6
_SD
COIL
1u
C422
1.8p
RF2.85V
C415
0.1u
C411
0
R430
L411
3.3nH
27p
C448
20
GND8
21
GND9
GSM_IN
7
9
GSM_OUT
3
TX_ENABLE
4
VBATT
VCC1
8
12
VCC2
VCC_OUT
10
VRAMP
6
VREG
5
GND19
31
GND2
14
32
GND20
33
GND21
GND22
34
35
GND23
GND24
36
GND25
37
38
GND26
39
GND27
40
GND28
15
GND3
GND4
16
GND5
17
18
GND6
GND7
19
U402
BAND_SELECT
2
1
DCS_IN
DCS_OUT
11
GND1
13
GND10
22
GND11
23
24
GND12
25
GND13
GND14
26
27
GND15
GND16
28
GND17
29
30
GND18
RF3110
0.1u
C447
TP402
RF2.85V
C428
0.1u
100p
L405
4.7nH
C401
22p
C430
C410
0.1u
L403
NC
470p
C442
C412
10p
RF2.85V
TP406
33p
5.6K
R407
C413
C445
10p
22
TxQP
2
TxVCOTune
UHFBYP
49
UHFCPO
41
50
UHFTune
8
VCC1
26
VCC2
52
VCC3
VCC4
59
36
VCCD
VCCF
37
42
VCCFNCP
60
VCCTxVCO
VCCUHF
51
48
VDDBB
58
RxIP
RxQN
55
56
RxQP
SXENA
43
TXBYPASS
7
32
T_H
TxCPO
9
TxDCSPCS
1
4
TxEN
TxFN
25
24
TxFP
64
TxGSM
TxIN
21
10
TxINP
20
TxIP
TxQN
23
LNAGSMIN
11
LNAPCSIN
15
54
LON
LOP
53
LPFADJ
31
NC1
63
62
NC2
NC3
61
34
NC4
NC5
33
16
NC6
NC7
17
PCO1
5
6
PCO2
RXEN
3
RxIN
57
27
CapIP
30
CapQN
CapQP
29
DATA
45
14
FEENA
18
FILTN
FILTP
19
38
FREF
G1
GND1
40
GNDCP
GNDD
35
GNDFN
39
12
GNDLNAGSM
44
LDMUX
LE
47
LNADCSIN
13
CX74017
U401
46
CLK
28
CapIN
C455
1000p
22p
C425
10
R420
R405
100
2012
C426
8200p
NC
L406
FILM
22p
C409
390
R421
13MHz
X401
1
CTL
2
GND
3
OUT
VCC
4
R401
RF2.85V
15K
1p
C433
C451
RF2.85V
1.5p
R402
10
100p
C449
VBAT
TP404
TP403
RF2.85V
RF2.85V
390
R411
C453
100p
TP408
10nH
L408
OUT2
OUT401
G1
2
G2
4
G3
6
8
G4
IN1
1
IN2
3
OUT1
7
5
39p
C402
FL402
FAR-G6CS-1G8425-L257
39K
R423
R426
1%
1M
L412
10nH
NC
R429
R416
180
2.2K
R413
C438
12p
22p
C441
C450
0.5p
8
ANT
DCS_RX
1
DCS_TX
3
EGSM_RX
10
EGSM_TX
5
GND1
4
GND2
6
GND3
7
GND4
9
GND5
12
GND6
13
VC1
2
VC2
11
FL401
LMSP54AA-097
510
R410
NC
R427
R418
10
VBAT
C421
GND
3
IN
2
OUT
4
VCC
5
10u
U403
SN74AHC1GU04DCKR
L409
2.7nH
10u
C458
TP405
2012
C423
220p
C437
22p
0.1u
C435
C446
22p
L410
0
180
R415
47
R406
C457
2012
2.2u
0
R403
150nH
L404
1608
C431
10p
470p
C459
47p
C420
33
R414
RF2.85V
470p
C443
100
R404
R408
130
DCSSEL
GSMSEL
TX_RAMP
TXPA
RF2.85V
BANDSEL1
AFC
VSYNTHEN
TEMPSENSE
13MHZ
2V7_VTCXO
PLL_PD
T_H
TX_EN
TXIN
TXIP
TXQN
TXQP
PLL_CLK
PLL_DATA
PLL_LE
BANDSEL1
RX_EN
RXIN
RXIP
RXQN
RXQP
8.4 RF Part
- 118 -
Summary of Contents for G3100
Page 32: ... 34 3 TECHNICAL BRIEF Figure 3 20 TX IQ Signal Figure 3 21 RX IQ Signal ...
Page 40: ... 42 Figure 3 26 1 Voice band circuit diagram Headset Hands free kit part 1 3 TECHNICAL BRIEF ...
Page 42: ... 44 Figure 3 27 AD6521 circuit diagram 3 TECHNICAL BRIEF ...
Page 73: ... 75 4 3 8 Receiver RF Level Figure 4 1 Test Points of Rx Level 4 TROUBLE SHOOTING ...
Page 74: ... 76 4 3 9 Transmitter RF Level Figure 4 2 Test Points of Tx Level 4 TROUBLE SHOOTING ...
Page 81: ... 83 The Receiver part Circuit Diagram C203 C207 C206 4 TROUBLE SHOOTING ...
Page 87: ... 89 R202 MIC201 R204 C204 C201 R208 R206 C208 Q203 4 TROUBLE SHOOTING ...
Page 93: ... 95 Test SIM Connector Check J301 4 TROUBLE SHOOTING ...
Page 97: ... 99 J201 R240 C234 L201 R241 4 TROUBLE SHOOTING U205 U203 U204 ...
Page 101: ... 103 CN302 U203 U204 4 TROUBLE SHOOTING ...
Page 102: ... 104 U205 4 TROUBLE SHOOTING ...
Page 117: ... 119 9 PCB LAYOUT 9 1 Rear Part ...
Page 118: ...9 2 Front Part 120 ...
Page 134: ... 137 13 EXPLODED VIEW REPLACEMENT PART LIST 13 1 Exploded View ...