LG KG290 - Page 64

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 65 -
Check RF600.ANT, RF with RF
Cable connected.
Open
Yes
Changing RF600
Check RF600.ANT,RF
with RF Cable disconnected
Short
Yes
Changing RF600
No
No
Check C544,C545,C546
Check whether Ant SW
Set as TX mode
Refer to Graph 4.3.2
Refer to Table 4.3.2
Yes
Check Vctrl 1,2,3 & Vdd
Check RF Level of
FL500 Pin 6(for EGSM) &
Pin 8(for DCS&PCS)
Pin6 : ~29.5dBm
Pin8 : ~26.5dBm
No
Yes
No
Changing board
Go to 4.3.4 Checking PAM
control signal
END
For the test,
TX Stand alone Mode is needed. Refer to
chapter 10 (PL=7 for EGSM, PL=2 for
DCS&PCS)
Checking Flow
Table 4.3.2
TX Mode EGSM DCS/PCS
Vctrl 1 On On
Vctrl 2 Off On
Vctrl 3 Off Off