User Guide

# Signal name Test point Voltage (all bands)

1 VCTCXO supply R7501 2.5 V

2 AHNEUS supply from DC/DC conv C7590 3.2 V

3 FEM supply L7510 3.9 V

4 WCDMA PA supply from DC/DC conv C7543 0 V (1.3 V* when transmitting. Settings

as in figure below)

5 Vbat at WCDMA PA C7547 3.9 V

6 Supply input to DC/DC conv L7592 3.9 V

* With these settings, the result should be 1.3 V.

RM-348; RM-349; RM-350

RF Troubleshooting

Page 4 –8 COMPANY CONFIDENTIAL Issue 2