LG KG245 Service Manual page 58

CHECKING FLOW
Check C439,C440
Check whether Ant SW
Set as TX mode
RRefer to Graph4-6
RRefer to Table 6-11
Check RF Level of
FL400 Pin 5 (for GSM) & Pin 3 (for
DCS)
Check SW400.ANT, RF with RF
Cable connected.
Check SW400.ANT,RF
with RF Cable disconnected
ANT SW VC_EGSM
DCS TX
EGSM TX
EGSM, DCS RX
Table 4-3
For the test,
TX Stand alone Mode is needed. Refer to
chapter 11 (PL=7 for GSM, PL=2 for DCS)
Check VC_EGSM,
VC_DCSPCS
Yes
Pin5 : ~29.5dBm
Pin 3 : ~26.5dBm
Yes
Open
Yes
Short
Yes
END
VC_CDSPCS
0 1
1 0
0 0
4. TROUBLE SHOOTING
No
Changing board
No
Go to 4.3.5 Checking PAM
control signal
No
Changing SW400
No
Changing SW400
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