Circuit Diagram - LG -S310 Service Manual

7. CIRCUIT DIAGRAM

16 15 14
L
RF BLOCK
±¸Á¶ FIX º¯µ¿ºÎ
K
J
I
H
AVDD_2V8
R100
22K
RF_TEMP
G
R101
10K
FL101
F
836.5 ,1880MHz
NC2
20
NC1
19
GND
GSM1800_1900TX
GND5
18
GND4
16
GND3
13
GND2
12
GND1
9
RF_ANT_SW2
VC2
10
RF_ANT_SW1
VC1
E
14
C124
C125
100p 100p
SW101
G2
ANT_FEED
D ANT RF
G1
C129 100p
L102
100n
C
B
A
16 15 14
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
13 12 11 10
Coaxial
ANT_SW1 ANT_SW2
L L
GSM850 RX
L L
EGSM900 RX
L L
DCS1800 RX
L L
PCS1900 RX
H L
GSM/EGSM TX
L H
DCS/PCS TX
U101
FL100
C110
16
OUT 500HM DCS_PCS_OUT
3 2 15
C114 5.6p
C140 GND6
100p 14
C112
IN COUPLING DNI GND5
GSM850_900TX 4 1 13
15 22n
VCC_OUT
11 100p 12
C117 GND4
11
GND3
GSM1900RX2
10
8 FL102 8.2p C118 GND2
GSM1900RX1
4 1 9 SKY77336
7
GSM1800RX2 IN COUPLING GSM_OUT
6
GSM1800RX1 3 2 C120
5
OUT 500HM L107
GSM900RX2 28
4 DNI
18n PGND12
GSM900RX1
3 27
PGND11
GSM850RX2
26
2 PGND10
GSM850RX1
25
1 PGND9
51 24
PGND8
23
R115
PGND7
R117 R118
150 150
R116
39
13 12 11 10
9 8 7 6
G2 ANT
ANT_FEED
G1
SW100
C100
VBAT VPM_RF_2V8
39p
R102 2.2K
RF_IP
C103
82p
R104 2.2K
C105 39p
RF_IN
1
U100
I
2
C107 22u
IB
3
VSUP_BBI
4
REF_SEL
5 AD6546
SEL_26M
6
VLDO3_DRV
C108 56p 7
TXOP_LO
1 R106 C111 22p 8
DCS_PCS_IN TXOP_HI
2 9
12
BS RF_PA_BAND VLDO3_VCO
3 10
R107 R108
TX_EN RF_PA_EN VBAT1
4
VBATT 470 470
C115 C116
5
VAPC 0.1u 0.1u
6
NC
7
GND1
8 R109
GSM_IN
20 RF_TX_RAMP
R110 R111 R112 10K
17
PGND1 270 270
18 R114 C121
PGND2 VBAT
19 220p
PGND3 24K
20
PGND4
21
PGND5
22
PGND6
C126
C127
39p 0.1u
9 8 7 6
- 161 -
5 4 3 2
RF SMT Shield Can
SC100
1
AVDD_2V8
VPM_RF_2V8
C101
C102 100p
0.1u
R103 2.2K
RF_QP
C104
30
82p
Q
29 R105 2.2K
RF_QN
QB
28
SCLK RF_S_CLK
27
SDATA RF_S_DATA
26
SEN RF_S_EN
25
VDD
24 C109 1n
REF_OP
23
REFIN
22
REFINB X100 DSX321G-26M
21
4 3
VSUP_REF
C113
1 2 L101
39p
1u
26MHz
R113 1K
C122 C123
220n 0.1u
C128
220n
DCS EGSM GSM850
PCS
C131
C136
C130 C132 C133 C134 C135 C137
10p 3.9p 3.9p 22p 10p
10p 22p 10p
L103
L104 L105 L106
18n 18n
6.8n 4.7n
5 4 3 2
1
L
K
J
I
H
G
F
CLK_26M
RF_AFC
E
D
C
B
A
1
LGE Internal Use Only