User Guide

NPM-6/6X
System Module and User Interface CCS Technical Documentation
Page 8 Nokia Corporation. Issue 2 06/03
Introduction
Electrical Modules
The system module AK4 consists of Radio Frequency (RF) and baseband (BB). User Inter-
face (UI) contains display, keyboard, IR link, vibra, HF/HS connector and audio parts.
FM radio is located on the main PWB AK4.
The electrical part of the keyboard is located in separate UI PWB named KU4. KU4 is con-
nected to radio PWB through spring connectors.
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.
The UI module is described in a dedicated section of the manual.
Interconnection Diagram
Figure 1: Interconnection diagram
IHF
speaker
T
omahawk
Accessories
Keyboard
module
Microphone
IR Link
Earpiece
Antenna
Charger
BatterySIM
Display
Module
NHL-4
Radio
NPM-6/6X
/
Flashlight