Troubleshooting Charts; Introduction To This Section; List Of Troubleshooting Charts - Motorola VRS750 Service Manual

Troubleshooting Charts

Introduction to this
Section
List of
Troubleshooting
Charts
This section contains detailed troubleshooting flowcharts. These
charts should be used as a guide in determining problem areas. They
are not a substitute for knowledge of circuit operation and astute
troubleshooting techniques. It is advisable to refer to the related circuit
descriptions in the "Hardware Detailed Theory of Operation,"
Chapter 6.
Chart
Number
1 VRS Enable Failure
2 Error 12/10
3 Error 12/81
4 Error 12/82, Codeplug Checksum Error*
5 Error 12/84, Configuration Register Corruption*
6 Error 12/88, HC11 RAM Failure
7 VRS 001, VRS Synthesizer Lock Failure
8 Single Tone Encode Failure
9 Single Tone Failure
10 Base-to-Portable Repeat Failure
11 Portable-to-Base Repeat Failure
12 VRS ICM Audio Failure
13 Serial Bus Failure
14 Portable Audio at Local Speaker Issue
15 Programming/Tuning Failure
*Older VRS-EP versions may show a 12/82 Error flashing every 5 seconds for
Codeplug Checksum Error, and a 12/82 Error at power-up only for
Configuration Register Corruption.
Description
8
Page
Number
68
69
69
69
69
69
70
71
72
73
74
75
76
77
78
67