LG GD910 - Page 51

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. RF Circuit Technical Brief
GD910 service manual
[Figure 4.2.5-1] GD910 Front End Control (FEM input)
[Figure 4.2.5-2] GD910 Front End Control (Control signal from Baseband IC)
MAIN ANT
UMTS3
VC1
3
VC2
4
VC3
5 6
VC4
7
VDD
GND2
8
GND3
23
GND4
24
GND5
GSM1800_1900TX
9
GSM1800_RX1
16
17
GSM1800_RX2
GSM1900_RX1
18
19
GSM1900_RX2
11
GSM850_900TX
GSM850_RX1
12
13
GSM850_RX2
14
GSM900_RX1
15
GSM900_RX2
UMTS1
20
UMTS2
21
22
LMSP43QL-771
FL400
ANT
2
GND1
1
10
1
2
ANT401
C440
0.1u
1
A1
A2
5
B1
2
6
B2
4
GND
8
VCC
Y1
7
Y2
3
NL27WZ32USG
U403
1800FB404
1800FB403
SW400
MM8130-2600
G1G2
G3 G4
INOUT
1800FB401
1800FB402
C439
1000 pF
1u
C444
2V85_VRF
C400
6.8p
100p
C405
2.2nH
C401
L426
NA
2V85_VRF
C517
DNI
ANT_SEL6
ANT_SEL2
ANT_SEL1
ANT_SEL4
ANT_SEL3
ANT_SEL5
T_OUT1
P7
T_OUT2
T_OUT3
W11
T_OUT4
U10
U9
T_OUT5
T_OUT6
AA10
T_OUT7
W10
N7
T_OUT8
SPK_AMP_EN
_CHG_EOC
ANT_SEL1
ANT_SEL3
ANT_SEL2
PA_MODE
B18
GPIO14
A15
GPIO15
GPIO16
B13
C13
GPIO17
GPIO18
A12
GPIO19
B12
ANT_SEL6
ANT_SEL5
ANT_SEL4
3G_PA_MODE1