LG C1150 Service Manual page 62

(4) Checking Ant SW & Mobile SW
Checking Flow
Check L304, L306
Check whether Ant SW
Set as TX mode
Refer to Graph 4-7(a),4-7(b)
Refer to Table 4-2
Check RF Level of
FL301 Pin 5 (for GSM) & Pin 3
(for DCS)
Check SW301.ANT, RF with
RF Cable connected.
Check SW301.ANT,RF
with RF Cable disconnected
Table 4-2
ANT SW
DCS TX
EGSM TX
EGSM,DCS RX
For the test,
TX Stand alone Mode is needed. Refer to
chapter 11 (PL=7 for GSM, PL=2 for DCS)
Check VC1, VC2
Yes
Pin5 : ~29.5dBm
Pin 3 : ~26.5dBm
Yes
Open
Yes
Short
Yes
END
VC1 VC2
0 1
1 0
0 0
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4. TROUBLE SHOOTING
No
Changing board
No Go to 2,3,4 Checking PAM
control signal
No
Changing SW301
No
Changing SW301