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Table of Contents
Chapter 1 THEORY OF OPERATION
1.0 Overview ..............................................................................................................1-1
2.0 Radio Power Distribution .....................................................................................1-1
3.0 Controller Circuits ................................................................................................1-2
3.1 Controller Architecture....................................................................................1-2
3.2 MCU Digital Architecture ................................................................................1-2
3.3 Real Time Clock .............................................................................................1-3
3.4 ModB/Vstby Supply ........................................................................................1-4
3.5 Audio/Signaling Architecture ..........................................................................1-4
Chapter 2 TROUBLESHOOTING CHARTS
1.0 300R1 Controller..................................................................................................2-1
2.0 VHF Controller (except models with PCB 8486473Z04
)
......................................2-2
3.0 VHF Controller (for models with PCB 8486473Z04
)
............................................2-3
4.0 Lowband Controller..............................................................................................2-4
Chapter 3 CONTROLLER SCHEMATICS
1.0 Allocation of Schematics and Circuit Boards .......................................................3-1
2.0 Controller - Set 1 (PCB 8486062B12/B14, 8485726Z01)....................................3-5
3.0 Controller - Set 2 (PCB 8486101B09/B10) ........................................................3-11
4.0 Controller - Set 3 (PCB 8485658Z01)................................................................3-17
5.0 Controller - Set 4 (PCB 8486062B16/17, 8486101B11) ....................................3-23
6.0 Controller - Set 5 (PCB 8485726Z04)................................................................3-29
7.0 Controller - Set 6 (PCB 8486473Z04)................................................................3-35
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