LG F2400 Service Manual page 46

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(4) Checking Ant SW & Mobile SW
Test Points
Circuit Diagram
4. TROUBLE SHOOTING
Figure 4-5
Waveform
ANT SW Control GSM& DCS RX Mode
ANT_SW1
GSM_TX
HIGH
DCS_TX
LOW
RX
LOW
Table 4-2
- 47 -
Graph 4-3
ANT_SW2
LOW
HIGH
LOW

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