L
PIN 13
L
L
DCS1800 RX
GSM850 RX
L
L
L
L
H
PCS1900 RX
VC1
GSM850_EGSM TX
VC2
DCS_PCS TX
L
EGSM900 RX
H
L
PIN 14
6
11
GSM1800_1900TX
GSM1900RX1
7
8
GSM1900RX2
1
GSM850RX1
GSM850RX2
2
GSM850_900TX
13
3
GSM900RX1
GSM900RX2
4
19
NC1
20
NC2
16
VC1
VC2
10
L
LMSP43NA-782
U502
17
ANT
GND1
9
GND2
12
14
GND3
GND4
15
GND5
18
5
GSM1800RX1
GSM1800RX2
5p
C510
R507
1.2nH
R526
NA
DNI
R506
C502
0.01u
2.7p
C508
DNI
L502
AP504
C511
5p
R525
DNI
AP505
1
R501
C509
2.7p
1
R502
C513
5.6p
3.9nH
L507
15nH
L506
L501
4.7nH
5.6p
33p
C512
C501
L505
18nH
8.2p
C515
AP501
AP503
8.2p
C514
DNI
C?
DNI
C?
SW501 RF-600
ANT
G1
G2
RF
3.3nH
L508
C503
120p
6.8p
R508
AP502
VC2
VC1
- 98 -
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. TROUBLE SHOOTING
Fig 8 RF S/W circuit (U501)
TP2
TP2
TP1
SW500
TP1