User Guide

PAMS
UIF Module DU8
NHB–3
Technical Documentation
Original 26/97
Page 5–2
CHAPTER 5 – UIF MODULE DU8
CONTENTS
Page No
Introduction 5–3
Technical Outline 5–3
Mechanics 5–3
Electronics 5–4
List of Submodules and Mechanical Parts 5–5
Technical Specifications 5–5
Maximum Ratings 5–5
DC Characteristics 5–5
Control Signals 5–6
AC Characteristics 5–6
External Signals and Connections 5–7
Mechanical Characteristics 5–9
Functional Description 5–9
Circuit Description 5–9
DU8C Circuit Description 5–9
Keyboard scanning and display driver control 5–9
Keyboard and display illumination 5–9
Audio Circuitry 5–10
LCD Module Interface 5–10
SIM interface 5–11
Power Distribution Diagram 5–11
Assembly 5–12
Construction 5–12
Assembly Description 5–12
Flexi Diagram 5–14
Assembly Parts of UIF Module DU8 5–14
Testing 5–14
Recommended Test Equipment 5–14
Test Procedure 5–14
Circuit Diagram of DU8 5–15
Layout and Foil Diagram 5–16