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Table of Contents

Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS

1.0 CP040 Model Chart .............................................................................................1-1

2.0 Technical Specifications ......................................................................................1-2

Chapter 2 THEORY OF OPERATION

1.0 Introduction ..........................................................................................................2-1

2.0 VHF (136-162MHz) Receiver..............................................................................2-1

2.1 Receiver Front-End .......................................................................................2-2

2.2 Receiver Back-End.........................................................................................2-3

3.0 VHF (136-162MHz) Transmitter...........................................................................2-4

3.1 Transmitter Power Amplifier ...........................................................................2-4

3.2 Antenna Switch...............................................................................................2-4

3.3 Harmonic Filter ...............................................................................................2-5

3.4 Antenna Matching Network ............................................................................2-5

3.5 Power Control.................................................................................................2-5

4.0 VHF (136-162MHz) Frequency Generation Circuitry...........................................2-6

4.1 Fractional-N Synthesizer ................................................................................2-7

4.2 Voltage Controlled Oscillator (VCO) ...............................................................2-8

Chapter 3 TROUBLESHOOTING TABLES

1.0 Troubleshooting Table for Receiver.....................................................................3-1

2.0 Troubleshooting Table for Synthesizer ................................................................3-3

3.0 Troubleshooting Table for Transmitter ................................................................3-4

4.0 Troubleshooting Table for Board and IC Signals ................................................3-6

Chapter 4 UHF PCB/SCHEMATICS/PARTS LISTS

1.0 Allocation of Schematics and Circuit Boards .......................................................4-1

1.1 VHF (136-162MHz) ........................................................................................4-1

1.2 Six Layer Circuit Board...................................................................................4-1

1.3 Speaker and Microphone Schematic..............................................................4-2

2.0 VHF PCB 8486769Z02-A Schematic Diagrams ..................................................4-3

3.0 VHF PCB 8486769Z02-A Parts List...................................................................4-11

Motorola CP040 Service Information

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