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) 5-31
5.16 TX RF (UHF R1/700-800 MHz)—Page 1
TX
power OK?
Place XCVR and VOCON
into the analysis fixture.
Key up. Measure RF
power at antenna port
Ye s
No
No
Ye s
Ye s
No
No or low
TX power
Check
FGU
Frequency
OK?
No
Ye s
Check
FGU
Level
about
-3 dBm?
Check coaxial
connector and
cable assembly
Measure RF level
at driver amp
outlet, C107.
Use a spectrum analyzer
and high-impedance RF
probe. Measure TXRF
at TP11
RF level OK?
Approx. +26 dBm
No
No
Ye s
Ye s
Level about
+36 dBm?
Check
switch
Measure RF levels
at C103 and D701-
cathode. Calculate
switch loss
Measure RF level
at PA output,
C103.
Measure RF levels
at D701-cathode and
TP02. Calculate
harmonic filter loss
Loss < 1 db?
No
Ye s
Go to
VOCON TX
AUDIO flowchart
Loss < 2 db?
Remove
SH700,
repair defects
1
2
MAEPF-27475-B