User Guide

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 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 note below)

RM-135

Nokia Customer Care RF troubleshooting

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