LG GT350 Service Manual page 91

4. TROUBLE SHOOTING
4.12.3 Checking Mobile SW & FEM
4.12.3 Checking Mobile SW & FEM
ANT601
C637
8.2p
C612
L608
DNI
12n
TP5 ~ 8
TP5 ~ 8
LGE Internal Use Only
Mobile SW & FEM Circuit Diagram
Mobile SW & FEM Circuit Diagram
TP1
TP1
TP1
CN601
L601
100n
Figure 8. Mobile SW & FEM Circuit
Figure 8. Mobile SW & FEM Circuit
Checking Points
Checking Points
FL60
FL60
Figure 9. Mobile SW & FEM
Figure 9. Mobile SW & FEM
Table 2. FEM RX Control Logic
EGSM/GSM850
Table 2. FEM RX Control Logic
FE1 OFF
EGSM/GSM850
FE2 OFF
FE1 OFF
FE2 OFF
CI:$0.05(CMOS->PIN)
TP2
TP2
TP2
C604
ANT
17
22p
CN601
CN601
DCS/PCS
ON
DCS/PCS
OFF
ON
OFF
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TP4
TP4
TP
TP4
R606 100
(FROM Transceiver)
VC1
R607 100
VC2 (FROM Transceiver)
C607 C610
47pF 47pF
TP3
TP3
TP3_C604 (FE1)
TP4_C605 (FE2)
TP3_C604 (FE1)
TP4_C605 (FE2)
TP2
TP2
TP1
TP1
Only for training and service purposes