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