Chapter 5 Troubleshooting Charts; List Of Troubleshooting Charts; Table 5-1. Troubleshooting Charts List - Motorola APX 7000 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 5V Failure
DC Supply 3 Volt Failure
DC Supply 1.8 Volt Failure
DC Supply 1.5 Volt Failure
Top/CID Display Failure
Main Display Failure
Volume Set Error
Channel Select Error
Keypad Error
Side Button Error
VOCON TX Audio Error
Keyload Failure
Secure Hardware Failure
Removable Memory Failure
RX RF Failure
FGU Failure
FGU Power Failure
GPS Failure
PA 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 No.
5-2
5-3
5-15
5-16
5-17
5-18
5-19
5-20
5-22
5-23
5-24
5-25
5-26
5-30
5-31
5-32
5-33
5-45
5-46
5-47
5-48