Tuning Instructions; General; During Tuning, Proceed As Follows - Nokia NSB-7 Series Service Manual

PAMS Technical Documentation

Tuning Instructions

General

All tuning operations are carried out using the service software. The service software
turns the phone into the locals mode, in which the phone can be outwardly controlled
via the MBUS interface.
Tuning is based on the software communicating with the D/A and A/D converters of the
phone. In some instances the phone processor will also calculate the required correction
parameter.
The tuning values of the phone reside on the EEPROM. The contents of the EEPROM can
be read by the service software and saved as a file. This is advisable when there is need
to retain that information, e.g. in view of replacement of the circuit. The program also
enables writing the default parameters on the EEPROM, in which case all tuning steps
should be carried out.

During tuning, proceed as follows:

• Take care not to damage sensitive measuring instruments with excessive RF
power.
• Carry out all tuning steps in the shortest possible time to avoid excessive heating
of RF units.
• Perform all tuning steps in the order presented.
• Never try to mask a fault by tuning it out!
Issue 1 06/00 ãNokia Mobile Phones Ltd.
Service Software Instructions
NSB-7
Page 95