LG C1100 Service Manual page 50

(5) Checking SAW Filter Circuit
Test Points
FL302
Figure 4-6.
Checking Flow
Check RF Level of
Saw Filter Input
For GSM : FL302.1
Check RF Level of
Saw Filter Output
For GSM : FL302.3
For DCS : FL303.3
Saw Filter is OK
See next Page to check
Rx IQ Signal
For the test,
RX Stand alone Mode is
needed. Refer to chapter 11
FL303
FL303.1 : ~ -61dBm
Check the parts are
well Soldered
For GSM : C387
Yes
FL302.3 : ~ -64dBm
FL303.3 : ~ -65dBm
Check the parts are
well Soldered
Yes
For GSM : L303,C351
For DCS : L304, C353
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Circuit Diagram
2 3 FL302
C387
G1 O1
1
IN
G2 O2
27p
5 4
B7820
2 3 FL303
G1 O1
1
IN
G2 O2
5 4
B7821
No
Changing
C387for GSM
No Changing
C387for GSM
Yes
Changing
L303, C351 for GSM
L304, C353 for DCS
4. Trouble Shooting
C351
1p
L303 27nH
C352
1p
C353
1p
L304 7.5nH
C354
1p
Changing
No
FL302 for GSM
FL303 for DCS