LG KG320 - Page 63

4. TROUBLE SHOOTING
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Check SW400.ANT, RF with RF
Cable connected.
Open
Yes
Changing SW400
Check SW400.ANT,RF
with RF Cable disconnected
Short
Yes
Changing SW400
No
No
Check C439,C440
Check whether FEM
Set as TX mode
 Rrefer to Graph4-6(a), 4-6(b)
Rrefer to Table 4-3
Yes
Check VC1, VC2, VC3
Check RF Level of
FL400 PIN 8(for GSM) & Pin 5 (for
DCS)
Pin10 : ~32.5dBm
Pin 8 : ~29.5dBm
No
Yes
No
Changing board
Go to 4.3.5 Checking PAM
control signal
END
For the test,
TX Stand alone Mode is needed. (PL=5 for
GSM, PL=0 for DCS)
Checking Flow
Table 4-2
Select Mode Vc(EGSM) Vc(DCS/PCS)
EGSM-Rx Low Low
EGSM-Tx High Low
DCS-Rx Low Low
PCS-Rx Low Low
DCS/PCS-Tx Low High