LG KE590 Service Manual page 45

4. TROUBLE SHOOTING
4.1.2.3 SAW Filter Bank
Pass wanted signal and include LNA matching circuit.
26
25
24
23
22
21
20
9
8
7
6
4
2
11
3
LGE Internal Use Only
GND13 EGSMGSM850TX
GND12 DCSPCSTX
GND11
GND10
GND9
GND8 PCSRX2
GND7 PCSRX1
FL401
GND6 HWXR693
GND5 SFAY00009801 DCSRX2
GND4 DCSRX1
GND3
GND2 EGSMRX2
GND1 EGSMRX1
VC_EGSMGSM850TX GSM850RX2
VC_DCSPCSTX GSM850RX1
<Fig.3> SAW Filter Bank Circuit Diagram
FL401
10
5
19
18
17
16
15
14
13
12
Copyright © 2007 LG Electronics. Inc. All right reserved.
- 46 -
22p
A1
PCSLNAI
B1
PCSLNAIB
C2
PCSDCSGND
C1
DCSLNAI
D1
DCSLNAIB
D2
DCSG90GND
E1
G90LNAI
F1
G90LNAIB
E2
G90G85GND
G1
G85LNAI
H1
G85LNAIB
F2
G85GND
G2
GNDLNA_TX1
H2
TXON
Only for training and service purposes