LG KG800 - Page 64

4. TROUBLESHOOTING
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(3) Checking Ant SW & Mobile SW
VC1 LOW
VC2 LOW
VC3 HIGH
VC1 LOW
VC2 HIGH
VC3 LOW
Waveform
FEM Control EGSM
Graph 4-6(a)
FEM Control DCS & PCS
Graph 4-6(b)
C414
C415
C416
Figure 4-5
TEST POINT
CIRCUIT
GND3
7
GND4
GND5
14
GND6
15
16
GND7
GSM18001900_TX
8
GSM1800_RX
4
GSM1900_RX
6
GSM900_RX
2
GSM900_TX
10
VC1
11
9
VC2
VC3
12
LMSP54LA-445TEMP
FL400
13
ANT
1
GND1
GND2
3
5
27p
C415
27p
C416C414
27p
ANT_SW2
ANT_SW1
ANT_SW3