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
6881094C31-C October 14, 2003
Troubleshooting Charts: TX RF (UHF R1/700-800 MHz) 5-33
TX RF (UHF R1/700-800 MHz)—Page 3
INT > 5 Vdc?
Vgate at TP111
is low (< 4 Vdc)
Measure INT
at TP104
Ye s
No
No
Ye s
Ye s
No
Replace
Q108
INT is low.
Measure VLIM
at TP119
PCIC is
programmed.
Measure TEMP
at R130
Bad PCIC
Replace U104
VLIM
about 2 to
3 Vdc?
No
Ye s
Measure
RFIN at
TP101
TEMP
< 1.0 Vdc at
25C?
RFIN is low, INT
is low, bad PCIC,
replace U104
TP101
< 0.5 Vdc?
Low output power,
RFIN is high, check
RF detectors and
op amp U106.
Repair defects
Repair temperature
sensor circuit
(U103, Q109,
R130)
4
4
TXINH
< 1 Vdc?
TX7V is low.
Measure TXINH
at P1-19, Q101-b
No
No
Ye s
Ye s
RXH
< 1 Vdc?
No
Ye s
Bad PCIC
Replace U104
RXH
> 5 Vdc?
Bad control
signal from
VOCON
Trace dc levels
through switching
transistors Q101,
Q102, Q103,
and Q106
Replace bad
transistors
Measure RXH
at U104-23
and Q103-b
3
MAEPF-27476-O