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
5-24 Troubleshooting Charts: RX RF
RX RF—Page 2
Q501-c
= 5.0 Vdc?
No
No
No
Ye s
Ye s
Ye s
Repair
Defects
Visual
examination
OK?
Check Voltage
Regulator U1
Q501-e
= 3.7 Vdc?
No
Ye s
Replace
Q501
Replace
Q502
Remove SH501
(UHF & 700-800)
or SH502 (VHF), inspect
2nd LO VCO
Signal
Present?
Measure 2nd LO at
TP501 (UHF & 700-800)
or TP18 (VHF)
on PCB side 2
No
No
Ye s
Ye s
LO Freq.
OK?
VHF: 42.6 MHz
UHF: 71.1 MHz
700-800:
107.4 MHz
Measure
RXCK, P1-5
RXFS, P1-6
RXDO, P1-12
Observe
0 to 3 Vdc
digital signals
Measure
bit clock rate
(Fbit) at RXCK
Levels
OK?
1
3
5
No
Ye s
RXFS = 20 kHz
sync pulse
Fbit =
1.2 MHz?
4
No
Ye s
No
Ye s
RXFS
OK?
RXDO = 24-bit I,
24-bit Q, 8-bit
AGC. AGC varies
with RF level
Go to
VOCON RX
AUDIO flowchart
RXDO
OK?
5
5
2nd LO, 700-800: 107.4 MHz, VHF: 42.6 MHz, about 356 mVpp
2nd LO DC bias
MAEPF-27471-B