LG S5000 Service Manual page 59

4. TROUBLE SHOOTING
Checking Flow
Check C539,C540
Check whether Ant SW
Set as TX mode
RRefer to Graph4-6
RRefer to Table 6-11
Check RF Level of
FL500 Pin 5 (for GSM) & Pin 3 (for
DCS)
Check SW500.ANT, RF with RF
Cable connected.
Check SW500.ANT,RF
with RF Cable disconnected
ANT SW
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_EGSM
VC_CDSPCS
0 1
1 0
0 0
No
Changing board
No
Go to 4.3.5 Checking PAM
control signal
No
Changing SW500
No
Changing SW500
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