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
October 14, 2003 6881094C31-C
5-20 Troubleshooting Charts: VOCON TX Audio
VOCON TX Audio—Page 2
MAEPF-27397-A
Replace U501
(GCAP II)
Replace
U509
(EEPOT)
Go to
TX RF
flowchart
Replace U301*
(Flipper ASIC)
Clock
and Frame Sync
present?
Data
present at TX
test point?
Use an oscilloscope to check the
SSI audio signals from the GCAP
(U703). The following test points
are used for data collection:
DCLK: 520 kHz Square Wave Clock*
TX: Audio Data Words
SYNC: 8 kHz Frame Sync Pulse
No
Ye s
Ye s
End
Problem
Resolved?
Ye s
1
2
1
No
No
End
Replace
U501
(GCAP II)
Is
1 kHz signal
present at about
14 mV
rms?
Problem
Solved?
No
Ye s
No
Ye s
256 kHz Square Wave Clock**
* on NTN9564, NNTN4563 & NNTN4819 VOCON boards
** on NNTN4717 VOCON board
* on NTN9564, NNTN4563 & NNTN4819 VOCON boards
** on NNTN4717 VOCON board
Replace U401**