Trouble Shooting Of Receiver Part - LG KE820 Service Manual

5.12.2 Trouble Shooting of Receiver Part

Checking Flow
START
Setup Test Equipment
Cell Power : -7 4dBm
EGSM CH30
DCS CH699
1
Check point
VCTCXO
Check point
PLL Control
Check point
Mobile SW &
4
Check point
RX I/Q Signal
Re-Download S/W & CAL
2
3
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5. Trouble shooting
Checking Points
Figure 2. Main PCB
Figure 3. Main PCB Bottom
1
2
3
4
3