LG GD510 Service Manual page 80

GD510 Operational Description
5.12.3 Checking Mobile SW & FEM
ANT602
ANT601
ANTENNA_PAD
C643 DNI
C656
0
TP5 ~ 8
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Only for training and service purposes
Mobile SW & FEM Circuit Diagram
ANTENNA_PAD
TP1
TP1
SW601
GRS302-2S-H22-E3000
C625
G2
ANT RF
G1
0
C697
0.5p
Figure 8. Mobile SW & FEM Circuit
Checking Points
TP3_C632 (FE2)
TP4_C613 (FE1)
FL601
TP2
SW601
TP1
Figure 9. Mobile SW & FEM
Table 2. FEM RX Control Logic
EGSM/GSM850
FE1 OFF
FE2 OFF
VRF_2V85
C635 C636
39p 100n
TP2
TP2
ANT
17
C608 22p
L608
100n
DCS/PCS
ON
OFF
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5. Trouble shooting
Revision A
TP4
TP4
TP3
FE1
FE2
C613 C632
100p 100p
TP3
LGE Internal Use Only
LGE Property