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7. CIRCUIT DIAGRAM
1
2
OUT500
OUT501
A
R505
6.8nH
L506
10p
R507
NA
SW500
RF500
B
L501
NA
C517
22p
L502
NA
C
MODE
VLOGIC
TX_EN
L
GSM 850 RX
H
H
L
D
PCS1900 RX
H
H
GSM 850 TX
H
H
PCS1900 TX
RF_TEMP
E
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3
4
5
R500
100ohm
R501
100ohm
R502
68
R504
100ohm
C500
C501
C502
C503
39p
68p
27p
27p
VBAT
C510
33u
6
1
PCS_RX
VBATT
7
20
GSM_RX
U501
GND9
8
19
GND1
PCS_IN
9
18
GND2
NC
SKY77517
10
17
GND3
GSM_IN
11
16
ANT
GND8
C521
7p
FL500
L503
5.6nH
B9310
C522
7p
1
9
I1
O1_1
8
O1_2
7
O2_1
C523
3p
4
6
I2
O2_2
L504
18nH
2
3
5 10
C531
3p
BS
L
PART_NO SFSB0001401
H
IN CASE OF GSM900/DCS1800
CHANGE THIS DUAL SAW FILTER
L
TO PART_NO SFSB0001401
H
R517
22K
PT500
10K
4
5
6
7
PA_BAND
PA_EN
TX_RAMP
ANT_SW
4dB
C504
R508
24
R509
R510
33p
220
220
C505
R512
30
10p
R511
R513
QP
180
180
5dB
C509
NA
QN
X500
2V75_VVCXO
C518
0.1u
3
4
2
1
C519
0.1u
26MHz
TSX-3225_26MHZ
C520
0.1u
RX1900B
25
RX1900
VLDO2
26
16
RX1800B
U502
VLDO1
27
15
RX1800
VBAT
28
14
RX900B
AD6548
VDD
29
13
RX900
EUSY0280101
VCC_TXVCO
30
12
RX850B
TXOP_HI
31
11
RX850
TXOP_LO
32
10
VLDO3
9
GND
33
C527
C528
0.1u
C532
C533
27p
39p
IP
C537
NA
IN
- 83 -
8
9
10
Close to BT Module
2V75_VVCXO
R514
26MHz_BT
L500
C506
0
NA
NA
C507
C508
2.2u
39p
5
VCC
C511
1000p
2
4
26M
GND
R515
3
AFC
C516
1K
NA
R516
1M
U500
MC74VHC1G04DFT2G
2V8_VMEM
VBAT
C524
C525
C526
0.1u
0.1u
0.1u
C529
C530
27p
0.1u
220n
S_EN
S_CLK
S_DATA
C534
C535
C536
27p
27p
27p
LGE Internal Use Only
C
D
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