Fem For Triband(Fl500) - LG KG290 Service Manual

3.3 FEM for Triband(FL500)

Mode Tx 1GHz
Vdd On
Vctrl1 On
Vctrl2 Off
Vctrl3 Off
C534
39p
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Tx 2GHz
On
On
On
Off
Table 3-1 Band SW Logic Table
FL500
YGHF-S006T
GND6
10
GND5
9
GND4
7
GND3
5
GND2
4
GND1
2
VCTRL3
20
VCTRL2
2V75_VVCXO 21
VCTRL1
22
VDD
3
C535
0.1u
C544 C545
39p 39p
Figure 3- 2 FEM CIRCUIT DIAGRAM
3. TECHNICAL BRIEF
Rx GSM Rx EGSM
On On
Off Off
On On
On Off
11
TX2G
8
TX1G
6
PCS_RX+
13
PCS_RX-
12
DCS_RX+
15
DCS_RX-
14
EGSM_RX+
17
EGSM_RX-
16
NC2
19
NC1
18
C546
39p
- 19 -
Rx DCS Rx PCS
On On
Off Off
Off Off
On Off
ANT_SW1
ANT_SW2
ANT_SW3
LGE Internal Use Only