User Guide

NPE-4

6 - Troubleshooting PAMS Technical Documentation

Page 6-52 ãNokia Corporation. Original

Phoenix tuning

Before any tuning the phone should syncronised with the PC.

Connect the the phone to a PC with DAU-9P cable and dongle and follow the following

instructions:

Start Phoenix Service Software

Select File Alt-F

Scan Product Ctrl-R

Wait until phone information shows in the lower right corner of the screen.

RF tuning after repairs

Different repairs require different tuning. In general it is necessary to determine in which

section the repair was done to select which tunings to perform. To determine if RF tuning

is necessary after repair it is important that the functionality of the repaired circuit is

understood well.

• In general repairs in the TX part will require "TX Power Level Tuning" and "TX IQ

Tuning".

• In general repairs in the RX part or PLL part always require "RX Calibration" and

in some cases require "RX AM Suppression" tuning, "RX Channel Select Filter Cal-

ibration" and/or "RX Band Filter Response Compensation" tuning.

Other parts interfacing to TX, RX or PLL might require tuning, but common sense should

be used, e.g. if a component that has no influence on RF performance has been changed,

e.g. the microphone, on/off key, mechanichal parts or similar, there is no need to do any

RF tuning.

RX Calibration

The "RX calibration" is used to determine gain at different gain-settings for front-end

and Hagar and needs to be done in both bands.

EGSM

Set operating mode to local mode

Select Maintenance Alt-M

Tuning T

RX Calibration C

Wait until the RX Calibration window pops up.

Select Band GSM 900

Autom.- 80

Man.- 50

Man.- 85