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Troubleshooting Charts: List of Troubleshooting Charts
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
Volume Set Error
Button Test
Top/Side Button Test
VCO TX/RX Unlock
VOCON TX Audio
VOCON RX Audio
RX RF
TX RF
Keyload Failure
Secure Hardware Failure
6871620L01-C
Table
5-1) end up by pointing to an IC to replace. It is not always
Table 5-1. Troubleshooting Charts List
Chart Title
5-1
Page No.
5-2
5-3
5-6
5-10
5-13
5-14
5-15
5-16
5-17
5-19
5-21
5-26
5-29
5-30
May 28, 2008
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Table of Contents
Troubleshooting
