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7. CIRCUIT DIAGRAM
- 78 -
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
L
1
2
3
B
6
close to DBB
5
D
4
850/900 TX
4
MODE
1
10
H
E
C
1800/1900 RX
5
A
8
A
7
3
7
D
6
9
C
A
1800/1900 TX
850/900 RX
ANT_SW1
ANT_SW2
H
L
L
H
L
2
H
C407
0.01u
DNI
C419
2.7p
C428
C402
1.5p
L408
15nH
C401
2.2p
V_EXTH
C409
39p
1000p
C431
L405
47nH
4.7K
R408
15p
C410
C413
47p
ANT403
L407
L406
5.1nH
3.9nH
1.5p
C414
C405
ECCH0003002
10u
GND5
10
12
GND6
GND7
13
14
GND8
16
GND9
P_GND
21
RSVD_GND
19
20
VAPC
VBATT
17
VCC1A
2
VCC1B
6
C2012JF1A106ZT
U400
SKY77318
1
BS
3
DCS_PCS_IN
DCS_PCS_OUT
15
EGSM_IN
4
EGSM_OUT
11
18
ENABLE
5
GND1
GND2
7
GND3
8
9
GND4
68p
C433
C400
1000p
V_EXTH
270K
R406
0.01u
C406
VBAT
10nH
R403
L404
10
3.5p
C434
15nH
L409
C435
4p
L400
3.3nH
C432
1000p
0.5p
C421
ANT401
ANT402
2.7nH
L410
0.01u
C408
C429
2.7p
L403
18nH
L401
1nH
L411
3.3nH
L412
1.8nH
0
R401
SW400
GRS300-2S-H36-E3000
ANT
G1
G2
RF
VDDRF1
C423
27p
0.5p
C422
1.5p
C403
1p
C417
R404
47
DNI
180p
C412
C418
DNI
C424
3.5p
C426
3.5p
C427
22K
PT400
ANT400
C436
C415
0.5p
4p
R405
47
15K
R400
C430
3.5p
C404
1.2p
C425
100p
L402
2.2nH
21
VDD
DNI
C411
18
GND7
22
GND8
GSM1800_1900_TX
15
GSM1800_RX1
3
4
GSM1800_RX2
GSM1900_RX1
1
2
GSM1900_RX2
17
GSM850_900_TX
GSM850_RX1
7
8
GSM850_RX2
GSM900_RX1
5
6
GSM900_RX2
23
NC1
24
NC2
19
VC1
VC2
20
FL400
LMSP43QC-789TEMP
11
ANT
GND1
9
GND2
10
12
GND3
GND4
13
14
GND5
GND6
16
680
R407
GSM_RXN
GSM_RXP
EGSM_RXN
EGSM_RXP
ANT_SW1
ANT_SW2
TXLB
TXHB
TX_RAMP
PCS_RXN
PCS_RXP
DCS_RXP
DCS_RXN
TEMPSENSE
PA_BAND
PA_EN