LG C3400 Service Manual page 53

4. Troubleshooting
Checking Flow
Check SW500 Pin ANT,RF
with RF Cable connected.
Check SW500 Pin ANT,RF
with No RF Cable Connected
Check C537,C531
Check whether Ant SW
Refer to Table 4-2
Check RF Level of
FL500.10 (for GSM) &
FL500.1(for DCS)
For these 2 test case,
No Call connection is needed
Set as RX mode
Ant SW & Mobile SW is OK
For this RF Level test case,
RX Stand alone Mode is needed
refer to chapter 11
Open
Yes
Short
Yes
VC1 :Low
VC2 :Low
Yes
Pin10 : ~ -62dBm
Pin 1 : ~ -63dBm
Yes
See next Page to check
Rx IQ Signal
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No
Changing SW500
No
Changing SW500
No
Changing the Board.
No
Changing FL500
ANT SW VC1
DCS TX
0
EGSM TX 1
0
EGSM, DCS RX
Table 4-2
VC2
1
0
0