User's Manual

b. Turn on the mobile control head and re-enable the VRS.
7. Tuning is complete.
8. Troubleshooting Charts
Introduction to this Section
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" section prior to
troubleshooting.
List of Troubleshooting Charts
Chart Number Description Page Number
1 VRS Enable Failure 44
2 Error 12/10 45
3 Error 12/81 45
4 Error 12/82, Codeplug Checksum Error 45
5 Error 12/84, Configuration Register Corruption 46
6 Error 12/88, HC11 RAM Failure 46
7 VRS 001, VRS Synthesizer lock error 46
8 Single Tone Encode Failure 46
9 Single Tone Failure 46
10 Base-to-Portable Repeat Failure 47
11 Portable-to-Base Repeat Failure 48
12 VRS ICM Audio Failure 49
13 Serial Bus Failure 51
14 Portable Audio at Local Speaker Issue 51
15 Programming/Tuning Failure 52
9. Diagrams and Parts Lists
Introduction to this Section
This section contains schematics, a component layout diagram, an exploded view, and
electrical and exploded view parts lists.
List of Diagrams and Parts Lists
Description Page Number
Printed Circuit Board Electrical Parts List 54-55
Printed Circuit Board Component Location Diagram 56
Printed Circuit Board Schematic Diagram 57-58