LG G5300 Service Manual page 19

3. TECHNICAL BRIEF
Testing Transmitter
Using a suitable high frequency probe measure the RF levels at the relevant points shown in
Fig. 3-9, 10, and compare your measurements with those shown in the diagram. If there are any
major difference between the readings taken and those indicated then further investigation of that
particular point will be required. It will also be necessary to ensure that all the following power
supplies and signals are present which control this part of the transmitter circuit:
1. The Control Signal of FEM (see Fig. 3-15, 16, 17)
2. RF2V8 (see Fig. 3-12)
3. 2V7_VTCXO (see Fig. 3-13)
4. 13 MHz (see Fig. 3-14)
5. TXEN, TXRAMP, TXPA (see Fig. 3-19)
6. TX IP, IN, QP, QN (see Fig. 3-20)
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