LG GD510 Service Manual page 90

GD510 Operational Description
5.13.6. Checking FEM & Mobile SW
ANT602
ANT601
ANTENNA_PAD
C643 DNI
C656
0
TP5
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Only for training and service purposes
Mobile SW & FEM Circuit Diagram
ANTENNA_PAD
TP1
TP1 TP2
SW601
GRS302-2S-H22-E3000
C625
G2
ANT RF
G1
0
C697
0.5p
Figure 28. Mobile SW & FEM Circuit
Checking Points
FL601
SW601
Figure 29 Mobile SW & FEM
Table 5. FEM TX Control Logic
EGSM/GSM850
FE1 OFF
FE2 ON
96/113
VRF_2V85
C635
C636
39p 100n
TP2
TP5
TP5
ANT
17
C608 22p
L608
100n
TP3_C632 (FE2)
TP4_C613 (FE1)
TP2
TP1
DCS/PCS
ON
ON
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5. Trouble shooting
Revision A
TP4
TP4 TP3
FE1
FE2
TP3
C613 C632
100p 100p
LGE Internal Use Only
LGE Property