Only For Training And Service Purposes - LG MG295 Service Manual

4. TROUBLE SHOOTING
Checking Flow
Check C543,C544,C545
Check whether Ant SW
Set as TX mode
Refer to Graph 4.3.2
Refer to Table 4.3.2
Check RF Level of
FL501 Pin 6(forEGSM) &
Pin 8(for DCS&PCS)
Check SW501.ANT, RF with RF
Cable connected.
Check SW501.ANT,RF
with RF Cable disconnected
LGE Internal Use Only
For the test,
TX Stand alone Mode is needed. Refer to
chapter 10 (PL=7 for GSM, PL=2 for
DCS&PCS)
Check Vctrl 1,2,3 & Vdd
Yes
Pin6 : ~29.5dBm
Pin8 : ~26.5dBm
Yes
Open
Yes
Short
Yes
END
TX Mode EGSM
Vctrl 1 On
Vctrl 2 Off
Vctrl 3 Off
Table 4.3.2
- 48 -
No
Changing board
No
Go to 4.3.4 Checking PAM
control signal
No
Changing SW501
No
Changing SW501
DCS/PCSS
On
On
Off
Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes