Introduction - Nokia NSB-9 Service Manual

CCS Technical Documentation

Introduction

The system module RM9 consists of Radio Frequency (RF) and baseband (BB). User Inter-
face (UI) contains display, keyboard, IR link, vibra, HF/HS connector and audio parts. Part
of the keyboard is implemented in separate flip module, named TF9.
FM radio is located on the main PWB RM9. Headset is used as an antenna for FM radio.
The electrical part of the T9 and half of qwerty keyboard is located inside Flip. TF9 is con-
nected to radio PWB through four 2-pole poco connectors
NSB-9 has Pop-Port accessory interface. Both two and three wire type of chargers are
supported. BLC-2 Li-ion battery with nominal capacity of 1000 mAh is used as main
power source.
The Baseband blocks provide the MCU, DSP, external memory interface and digital con-
trol functions in the UPP ASIC. Power supply circuitry, charging, audio processing and RF
control hard ware are in the UEM ASIC.
The purpose of the RF block is to receive and demodulate the radio frequency signal from
the base station and to transmit a modulated RF signal to the base station.
Issue 1 04/03
System Module and User Interface
Nokia Corporation
NSB-9
Page 7