Trouble Shooting Of Receiver Part - LG GD310 Service Manual

5.12 Trouble shooting of Receiver part

Checking Flow
START
Setup Test Equipment
Cell Power : –74dBm
EGSM CH30
DCS CH699
Check point ①
DCXO
Check point ②
PLL Control
Check point ③
Mobile SW & FEM
Check point ④
RX I/Q Signal
Re-Download S/W & CAL
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Only for training and service purposes
Checking Points
Figure 1. Main PCB
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5. TROUBLE SHOOTING
①
②
④
③
③
LGE Internal Use Only