User's Manual
Table Of Contents
- Front Cover
- Foreword
- Table of Contents
- Foreword ii
- List of Figures vii
- List of Tables xi
- Commercial Warranty xiii
- Model Numbering, Charts, and Specifications xvii
- Chapter 1 Introduction 1-1
- Chapter 2 Radio Power 2-1
- Chapter 3 Theory of Operation 3-1
- Chapter 4 Troubleshooting Procedures 4-1
- Chapter 5 Troubleshooting Charts 5-1
- Chapter 6 Troubleshooting Waveforms 6-1
- Chapter 7 Troubleshooting Tables 7-1
- Chapter 8 Schematics, Board Overlays, and Parts Lists 8-1
- Appendix A Replacement Parts Ordering A-1
- Glossary Glossary-1
- Index Index-1
- List of Figures
- List of Tables
- Related Publications
- Commercial Warranty
- Model Numbering, Charts, and Specifications
- Portable Radio Model Numbering System
- ASTRO XTS5000 VHF Model Chart
- ASTRO XTS5000R (Ruggedized) VHF Model Chart
- ASTRO XTS5000 UHF Range 1 Model Chart
- ASTRO XTS5000R (Ruggedized) UHF Range 1 Model Chart
- ASTRO XTS5000 700–800MHz Model Chart
- ASTRO XTS5000R (Ruggedized) 700–800MHz Model Chart
- Specifications for VHF Radios
- Specifications for UHF Range 1 Radios
- Specifications for 700–800 MHz Radios
- Chapter 1 Introduction
- Chapter 2 Radio Power
- Chapter 4 Troubleshooting Procedures
- Chapter 5 Troubleshooting Charts
- 5.1 List of Troubleshooting Charts
- 5.2 Main Troubleshooting Flowchart
- 5.3 Power-Up Failure
- 5.4 DC Supply Failure
- 5.5 Display Failure (NNTN4563, NNTN4819, & NNTN4717 VOCON Kits)
- 5.6 Display Failure (NTN9564)
- 5.7 Volume Set Error
- 5.8 Channel/Zone Select Error
- 5.9 Button Test
- 5.10 Top/Side Button Test
- 5.11 VCO TX/RX Unlock
- 5.12 VOCON TX Audio
- 5.13 VOCON RX Audio
- 5.14 RX RF
- 5.15 TX RF (VHF)
- 5.16 TX RF (UHF R1/700-800MHz)
- 5.17 Keyload Failure
- 5.18 Secure Hardware Failure
- Chapter 6 Troubleshooting Waveforms
- Chapter 7 Troubleshooting Tables
- Appendix A Replacement Parts Ordering
- Glossary
- Index
- Back Cover
Chapter 4 Troubleshooting Procedures
The purpose of this chapter is to aid in troubleshooting problems with the ASTRO XTS 5000 radio. It
is intended to be detailed enough to localize the malfunctioning circuit and isolate the defective
component. It also contains a listing of service tools recommended for PC board repair at the
component level.
4.1 Handling Precautions
Complementary metal-oxide semiconductor (CMOS) devices, and other high-technology devices,
are used in this family of radios. While the attributes of these devices are many, their characteristics
make them susceptible to damage by electrostatic discharge (ESD) or high-voltage charges.
Damage can be latent, resulting in failures occurring weeks or months later. Therefore, special
precautions must be taken to prevent device damage during disassembly, troubleshooting, and
repair. Handling precautions are mandatory for this radio, and are especially important in low-
humidity conditions. DO NOT attempt to disassemble the radio without observing the following
handling precautions.
1. Eliminate static generators (plastics, Styrofoam, etc.) in the work area.
2. Remove nylon or double-knit polyester jackets, roll up long sleeves, and remove or tie back
loose-hanging neckties.
3. Store and transport all static-sensitive devices in ESD-protective containers.
4. Disconnect all power from the unit before ESD-sensitive components are removed or inserted
unless otherwise noted.
5. Use a static-safeguarded workstation, which can be accomplished through the use of an anti-
static kit (Motorola part number 01-80386A82). This kit includes a wrist strap, two ground
cords, a static-control table mat and a static-control floor mat.
Most of the ICs are static sensitive devices. Do not attempt to
disassemble the radio or troubleshoot a board without first
referring to the following Handling Precautions section.
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C a u t i o n