Chapter 1 Introduction
1.1
General
This manual includes all the information needed to maintain peak product performance and
maximum working time for the ASTRO APX 3000 radio. This detailed level of service (component
level) is typical of the service performed by some service centers, self-maintained customers, and
distributors.
Use this manual in conjunction with the
APX 3000
764–870 MHz, UHF1 (380–470 MHz), UHF2
(450–520 MHz) and VHF (136–174 MHz)
Digital Portable Radios Basic Service Manual
, which can
help in troubleshooting a problem to a particular printed circuit (PC) board.
Conduct the basic performance checks outlined in the basic service manual first to verify the need to
analyze the radio and to help pinpoint the functional problem area. In addition, you will become
familiar with the radio test mode of operation, which is a helpful tool. If any basic receive or transmit
parameters fail to be met, the radio should be aligned according to the radio alignment procedure.
Included in other areas of this manual are functional block diagrams, detailed theory of operation,
troubleshooting charts and waveforms, schematics, and parts lists. You should become familiar with
these sections to aid in determining circuit problems. Also included are component location diagrams
to aid in locating individual circuit components and some IC diagrams, which identify some
convenient probe points.
Theory of Operation,
contains detailed descriptions of the operations of many circuits. Once you
locate the problem area, review the troubleshooting flowchart for that circuit to fix the problem.
Summary of Contents for Astro APX 3000
Page 1: ...APXTM TWO WAY RADIOS APX 3000 DETAILED SERVICE MANUAL ...
Page 2: ......
Page 4: ...Notes ...
Page 6: ...vi Document History Notes ...
Page 10: ...x Table of Contents Notes ...
Page 12: ...xii List of Tables Notes ...
Page 18: ...xviii List of Figures Notes ...
Page 22: ...xxii CommercialWarranty Notes ...
Page 46: ...3 20 Theory of Operation Main Board Notes ...
Page 84: ...3 58 Theory of Operation Bluetooth Notes ...
Page 208: ...6 64 Troubleshooting Waveforms LF CW on Spectrum Analyzer Notes ...
Page 222: ...7 14 Troubleshooting Tables List of Board and IC Signals Notes ...
Page 282: ...8 60 Schematics Boards Overlays and Parts Lists Main Board Block UHF1 84012513001_A Notes ...
Page 390: ...8 168 Schematics Boards Overlays and Parts Lists Main Board Block VHF 84012512001_A Notes ...
Page 456: ...9 8 Debugging Fixture Powering up Covert Board Notes ...
Page 468: ...Glossary 10 Glossary Notes ...
Page 472: ...Index 4 Index Notes ...
Page 473: ......