Nokia 3600, 3620 Service Manual

NHM-10

Company Confidential

3 - Service Software

CCS Technical Documentation

Page 3-18

         Copyright  2004 Nokia Corporation

Issue 2 01/2004

Company Confidential

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. It is recommended to perform complete RF tuning if RF is repaired.

•

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", “Rx 
Band Filter Response Calibration”.

•

If Mjoelner is changed all calibrations have to be done.

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, mechanical parts or similar, there is no need to do any RF 
tuning.

This calibration is calibrating the Base band filter inside Mjoelner. It is done by internally 
measuring a prototype filter, for this reason the calibration is done once, not separately 
in 2 bands.

Set operating mode to local mode

Select

Maintenance

Alt-M

Tuning

T

RX Channel Select filter Calibration

H

A window pops up:

Select Yes and the RX Channel Select Filter Calibration window pops up.