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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 UHF/ UHF2 Controller..........................................................................................2-1

1.1 All models except those with PCB 8486458Z03.............................................2-1

1.2 Models with PCB 8486458Z03 .......................................................................2-2

Chapter 3

CONTROLLER SCHEMATICS

1.0 Allocation of Schematics and Circuit Boards .......................................................3-1

2.0 Controller - Set 1 (PCB 8480450Z03, 8485641Z02, 8480587Z01,

All manuals and user guides at all-guidesbox.com

8485677Z01, 8480641Z03) ......................................................3-3

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Table of Contents