LG F3000 - Page 60

4. TROUBLESHOOTING
- 61 -
(2) Checking Ant SW & Mobile SW
VC1 LOW
VC2 LOW
VC3 HIGH
VC1 LOW
VC2 HIGH
VC3 LOW
Graph 4-7(b)
FEM Control DCS & PCS
Graph 4-7(a)
FEM Control EGSM
TEST POINT
CIRCUIT
Waveform
SW500
KMS-506
ANT
G1 G2
RF
27p
C505
ANT
13
GND1
1
GND2
3
GND3
5
GND4
7
14
GND5
15
GND6
GND7
16
8
GSM18001900_TX
4
GSM1800_RX
6
GSM1900_RX
2
GSM900_RX
10
GSM900_TX
VC1
11
VC2
9
12
VC3
FL610
LMSP54LA-445TEMP
C504
27p
C503
27p
1000p
C502
ANT_SW3
ANT_SW2
ANT_SW1