Chapter 5 Troubleshooting Charts; List Of Troubleshooting Charts; Table 5-1. Troubleshooting Charts List - Motorola ASTRO XTS 5000 Detailed Service Manual

Chapter 5 Troubleshooting Charts

This section contains detailed troubleshooting flowcharts. These charts should be used as a guide in
determining the problem areas. They are not a substitute for knowledge of circuit operation and
astute troubleshooting techniques. It is advisable to refer to the related detailed circuit descriptions in
the theory of operation sections prior to troubleshooting a radio.
5.1

List of Troubleshooting Charts

Most troubleshooting charts (see
noted, but it is good practice to verify supplies and grounds to the affected IC and to trace
continuity to the malfunctioning signal and related circuitry before replacing any IC. For
instance, if a clock signal is not available at a destination, continuity from the source IC should be
checked before replacing the source IC.
Main Troubleshooting Flowchart
Power-Up Failure
DC Supply Failure
Display Failure (NNTN4563, NNTN4819, & NNTN4717
VOCON Kits)
Display Failure (NTN9564)
Volume Set Error
Channel/Zone Select Error
Button Test
Top/Side Button Test
VCO TX/RX Unlock
VOCON TX Audio
VOCON RX Audio
RX RF
TX RF (VHF)
TX RF (UHF R1/700-800 MHz)
Keyload Failure
Secure Hardware Failure
Table 5-1) end up by pointing to an IC to replace. It is not always

Table 5-1. Troubleshooting Charts List

Chart Title
Page
Number
5-2
5-3
5-5
5-8
5-11
5-14
5-15
5-16
5-17
5-18
5-19
5-21
5-23
5-28
5-31
5-34
5-35