LG KE820 Service Manual page 104

5.12.7 Trouble Shooting of Transmitter Part
Checking Flow
Setup Test Equipment
Cell Power : -7 4dBm
EGSM CH30
DCS CH6
1
Check point
VCTCXO
Check point
PLL Control
Check point
TX I/Q Signal
4
Check point
Transceiver
5
Check point
PAM Control
6
Check
FEM & Mobile
Re-Download S/W & RF
CAL
2
3
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5. Trouble shooting
Checking Points
Figure 17. Main PCB Top
Figure 18. Main PCB Bottom
4
1
5
2
3
6