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
2-4 Radio Power: DC Power Routing—VOCON Board
Transistor Q501 is also under the control of the microcontroller unit (MCU) via Vref from U501. This
allows the MCU to follow an orderly power-down sequence when it senses that B+SENSE is off. This
sense is provided through MECH_SW_BAR (inverted B+SENSE, see Q508).
The digital circuits in the VOCON board are powered from regulators located in the GCAP II IC
(U501), an external 5 Vdc regulator (VCC5, U505), and an external 1.55 Vdc regulator (VSW_1.55V,
on NNTN4717 VOCON kit only). The GCAP II IC provides three supplies: VSW1, VSW2, and V2.
These regulators are software programmable. Table 2-4 lists the supply voltages and the circuits that
use these voltages.
Table 2-4. VOCON Board DC Power Distribution
Supply
Name
Output
Voltage
Supply Type
Unprogrammed
Output Voltage
Circuits Supplied
UNSW_B+ 9 to 6 Vdc
7.5 Vdc
nominal
Battery N/A VCC5 input
Mechanical switch
Power switch (FET)
Secure module
Real-time clock battery
SW_B+ 9 to 6 Vdc
7.5 Vdc
nominal
Battery N/A VSW1 input (GCAP)
Audio power amplifier
Side connector
SW_B+ to transceiver board
GCAP IC
Secure module
USB circuitry
VCC5 5Vdc Linear
Regulator
N/A Smart battery circuitry
Int. / ext. microphone bias
Audio preamplifier
Flipper IC
Keypad / Display LEDs
VSW1 3.8 Vdc Switching
regulator
software
progammable
3.2 Vdc 3-V regulators (RF)
VSW2 input
V2 input
VSW2 1.8 Vdc Switching
regulator
software
progammable
2.2 Vdc Patriot core
FLASH IC
SRAM
Display (only on NTN9564
VOCON board)
V2 3 Vdc*
2.9 Vdc**
Linear
regulator
software
progammable
2.775 Vdc Patriot I/O ring
Flipper IC
EEPOT
Display
16.8 MHz buffer
VSW_1_55V 1.55 Vdc Linear
regulator
N/A Patriot core (only on
NNTN4717 VOCON board)
* = NTN9564,NNTN4563 & NNTN4819 VOCON kits
** = NNTN4717 VOCON kit