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4 . TROUBLE SHOOTING
Checking Flow
Check R512, R515, R517
Check whether FEM
Set as TX mode
Refer to Graph4-6(a), 4-6(b)
Refer to Table 4-3
Check RF Level of
FL500 Pin 17 (for GSM) & Pin 15
(for DCS)
Check SW500.ANT, RF with RF
Cable connected.
Check SW500.ANT, RF
with RF Cable disconnected
For the test,
TX Stand alone Mode is needed. Refer to
chapter 11 (PL=7 for GSM, PL=2 for DCS)
Check VC1, VC2, VC3
Yes
Pin17 : ~29.5dBm
Pin15 : ~26.5dBm
Yes
Open
Yes
Short
Yes
END
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No
Changing board
No
Go to 4.3.5 Checking PAM
No
Changing SW500
No
Changing SW500
ANT SW CONTROL TABLE
VC1
EGSM_Tx
DCS PCS_Tx
EGSM DCS_ Rx
PCS_Rx
control singnal
VC2
VC3
L
H
L
H
L
L
L
L
L
H
L
L
Table 4-2
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