LG KC780 Service Manual page 97

5. TROUBLE SHOOTING
AP503 AP501 AP505
DNI
R525
C? R506
DNI DNI
LGE Internal Use Only
GSM850_EGSM TX
DCS_PCS TX
GSM850 RX
EGSM900 RX
DCS1800 RX
AP502 AP504
NA PCS1900 RX
R526
TP1
SW501 RF-600
R508
ANT
6.8p
L501
DNI
4.7nH
L502
SW500
Fig 8 RF S/W circuit (U501)
VC1 VC2
PIN 14 PIN 13
H L
L H
L
L
L L
L L
L L
TP2
17
G2
RF
G1
C508 C509 C510
C511
2.7p 2.7p
5p
5p
L506
L505
15nH
18nH
TP1
TP2
- 98 - Copyright © 2008 LG Electronics. Inc. All right reserved.
R501
VC1
1
C501
33p
R502
VC2
1
0.01u
C502
U502
LMSP43NA-782
C512 C513 C514 C515
5.6p 5.6p 8.2p 8.2p
L507
L508
3.9nH
3.3nH
Only for training and service purposes