User Guide

Table Of Contents

General voltage checking

Steps

1. Set up the main board in the module jig. The phone should be in local mode.

2. Check the following:

# Signal name Test point Voltage (all bands)

1 VCTCXO supply R7501 2.5 V

2 AHNEUS supply from DC/DC conv L7502 3.2 V

3 TXFEM supply L7510 3.9 V

6 Supply to AHNEUS DC/DC conv L7592 3.9 V

Figure 13 General voltage checking test points (main board, top side)

RM-429

RF troubleshooting

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