Chapter 1 Introduction; General; Notations Used In This Manual - Motorola ASTRO XTS 5000 Detailed Service Manual

Chapter 1 Introduction

1.1

General

This manual includes all the information needed to maintain peak product performance and
maximum working time. This detailed level of service (component level) is typical of some service
centers, self-maintained customers, and distributors. This manual is to be used in conjunction with
the ASTRO XTS 5000 Digital Portable Radios Basic Service Manual (Motorola part number
68P81094C28), which uses the pass/fail service approach to radio problems.
First conduct the basic performance checks outlined in the Basic Service manual. This will verify the
actual need for analyzing the radio and 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, then the radio should be aligned according to the radio alignment
procedure.
Included in other areas of this manual are disassembly/reassembly procedures, functional block
diagrams, detailed theory of operation, troubleshooting charts and waveforms, schematics and parts
lists, and exploded view and parts list. You should be very familiar with these sections to aid in
determining the problem circuit. Also included are component location diagrams to aid in locating
individual circuit components and some IC diagrams, which point out some convenient probe points.
The "Detailed Theory of Operation" on page 4-1
many circuits. Once the area of the problem is located, it would be strongly advisable to review the
operation of the circuit pertaining to the troubleshooting flow chart.
1.2

Notations Used in This Manual

Throughout the text in this publication, you will notice the use of warnings, cautions, and notes.
These notations are used to emphasize that safety hazards exist, and care must be taken and
observed.
D A N G E R
W A R N I N G
!
DANGER indicates an imminently
hazardous situation which, if not avoided,
will result in death or injury.
WARNING indicates a potentially hazardous
! !
situation which, if not avoided, could result in
death or injury.
contains detailed descriptions of the operations of