Motorola ASTRO XTS 5000 - Page 5

iv Table of Contents
November 16, 2006 6881094C31-E
Chapter 3 Theory of Operation............................................................ 3-1
3.1 Transceiver Board..........................................................................................................................3-2
3.2 VOCON Board .............................................................................................................................3-16
3.3 Encryption Module .......................................................................................................................3-42
Chapter 4 Troubleshooting Procedures............................................. 4-1
4.1 Handling Precautions.....................................................................................................................4-1
4.2 Recommended Service Tools........................................................................................................4-2
4.3 Voltage Measurement and Signal Tracing.....................................................................................4-3
4.4 Standard Bias Table ......................................................................................................................4-4
4.5 Power-Up Self-Check Errors..........................................................................................................4-5
4.6 Power-Up Self-Check Diagnostics and Repair (Not for Field Use)................................................4-6
Chapter 5 Troubleshooting Charts ..................................................... 5-1
5.1 List of Troubleshooting Charts.......................................................................................................5-1
5.2 Main Troubleshooting Flowchart....................................................................................................5-2
5.3 Power-Up Failure...........................................................................................................................5-3
5.4 DC Supply Failure..........................................................................................................................5-7
5.5 Display Failure (NNTN4563, NNTN4819, NNTN4717 & NNTN5567 VOCON Kits) ....................5-13
5.6 Display Failure (NTN9564) ..........................................................................................................5-16
5.7 Volume Set Error .........................................................................................................................5-19
5.8 Channel/Zone Select Error ..........................................................................................................5-20
5.9 Button Test...................................................................................................................................5-21
5.10 Top/Side Button Test ...................................................................................................................5-22
5.11 VCO TX/RX Unlock......................................................................................................................5-23
5.12 VOCON RX Audio........................................................................................................................5-28
5.13 VOCON RX Audio (for kit NNTN5567) ........................................................................................5-29
5.14 RX RF ..........................................................................................................................................5-31
5.15 TX RF (VHF and UHF Range 2)..................................................................................................5-36
5.16 TX RF (UHF R1/700-800 MHz)....................................................................................................5-39
5.17 Keyload Failure............................................................................................................................5-42
5.18 Secure Hardware Failure.............................................................................................................5-43
Chapter 6 Troubleshooting Waveforms ............................................. 6-1
6.1 List of Waveforms ..........................................................................................................................6-1
6.2 13 MHz Clock.................................................................................................................................6-2
6.3 16.8 MHz Buffer Input and Output .................................................................................................6-3
6.4 32.768 kHz Clock Outputs .............................................................................................................6-4
6.5 SPI B Data .....................................................................................................................................6-5
6.6 Receive Serial Audio Port (SAP) ...................................................................................................6-6
6.7 Receive Baseband Interface Port (RX BBP)..................................................................................6-7
6.8 Transmit Baseband Interface Port (TX BBP).................................................................................6-8
Chapter 7 Troubleshooting Tables ..................................................... 7-1
7.1 List of Board and IC Signals ..........................................................................................................7-1