LG C1150 Service Manual page 53

4. TROUBLE SHOOTING
(4) Checking Ant SW & Mobile SW
Test Points
Circuit Diagram
KMS-506 SW301
C312 22p
FL301
8
ANT
4
GND1
6 5
GND2 EGSM_TX
7 3
GND3 DCS_TX
9
GND4
12
GND5
13 10
GND6 EGSM_RX
14 1
GND7 DCS_RX
11 2
SHS-C090DR
C336
C338
SW 301. A N T
L306 (VC1 )
L304 (VC2 )
C316
NA
C346
NA
C326
27p
L304 33nH
ANT_SW2 GPO_11
10p
33nH
L306
ANT_SW1 GPO_9
3.3p
FL301. 10
Figure 4-5
Waveform
VC1
VC2
ANT SW Control GSM& DCS RX Mode
Graph 4-3
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SW 301. RF
FL301. 1
Low
Low