LG KG280 Service Manual - Page 18

FEM for TribandFL600

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3. TECHNICAL BRIEF 3.3 FEM for Triband(FL600) GSM_TX DCS/PCS_TX GSM_RX DCS_RX PCS_RX ANT_SW1 High Low Low Low Low Table 3-1 Band SW Logic Table ANT_SW2 Low High Low Low Low C615 22p ANT_SW2 ANT_SW1 R616 R617 100ohm 100ohm FL600 20 GND7 19 GND6 GND5 18 GND4 16 13 GND3 11 GND2 GND1 9 15 VC2 VC1 14 LSHS-M085FJ GSM850_900_TX 12 GSM1800_1900_TX 10 GSM1900_RX_OUT2 GSM1900_RX_OUT1 8 7 GSM1800_RX_OUT2 GSM1800_RX_OUT1 6 GSM900_RX_OUT2 5 4 GSM900_RX_OUT1 3 GSM850_RX_OUT2 GSM850_RX_OUT1 2 1 ANT 17 C630 C631 39p 39p Figure 3- 2 FEM CIRCUIT DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes - 19 - LGE Internal Use Only

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- 19 -
3. TECHNICAL BRIEF
3.3 FEM for Triband(FL600)
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
Table 3-1 Band SW Logic Table
Figure 3- 2 FEM CIRCUIT DIAGRAM
ANT_SW1
ANT_SW2
GSM_TX
High
Low
DCS/PCS_TX
Low
High
GSM_RX
Low
Low
DCS_RX
Low
Low
PCS_RX
Low
Low
R617
100ohm
GND6
19
GND7
20
10
GSM1800_1900_TX
5
GSM1800_RX_OUT1
6
GSM1800_RX_OUT2
GSM1900_RX_OUT1
7
8
GSM1900_RX_OUT2
GSM850_900_TX
12
GSM850_RX_OUT1
1
2
GSM850_RX_OUT2
GSM900_RX_OUT1
3
GSM900_RX_OUT2
4
VC1
14
VC2
15
LSHS-M085FJ
FL600
17
ANT
GND1
9
GND2
11
13
GND3
GND4
16
18
GND5
C630
39p
39p
C631
100ohm
R616
22p
C615
ANT_SW2
ANT_SW1