Table of Contents
Table of Contents
Foreword............................................................................................................................................ii
Document Copyrights ........................................................................................................................ii
Disclaimer ..........................................................................................................................................ii
List of Figures .............................................................................................viii
List of Tables .................................................................................................ix
Related Publications ......................................................................................x
Service Tools....................................................................... 1-1
1.1
Test Equipment.............................................................................................................................. 1-1
1.2
Service Aids................................................................................................................................... 1-2
2.1
3.1
Controller ....................................................................................................................................... 3-1
3.1.1
Microprocessor Circuitry ................................................................................................... 3-1
3.1.1.1
Memory Usage ........................................................................................................ 3-2
3.1.1.2
3.1.1.3
3.1.1.4
3.1.1.5
3.1.1.6
3.1.1.7
3.1.1.8
Boot Mode Control................................................................................................... 3-4
3.1.1.9
3.1.1.10 Battery Gauge.......................................................................................................... 3-4
3.1.2
Audio Circuitry .................................................................................................................. 3-4
3.1.2.1
3.1.2.2
Audio Power Amplifier ............................................................................................. 3-5
3.1.2.3
3.1.2.4
PTT Circuits ............................................................................................................. 3-6
3.1.2.5
VOX Operation ........................................................................................................ 3-6
3.1.2.6
HKLN4216A
Module 1: VHF 146-174 MHz
iii
November 24, 2003