Motorola EP450 Manuals

Manuals and User Guides for Motorola EP450. We have 3 Motorola EP450 manuals available for free PDF download: Service Manual, Basic Service Manual

Motorola EP450 Service Manual (173 pages)

VHF 146-174 MHz UHF 403-440 MHz UHF 438-470 MHz UHF 465-495 MHz

Brand: Motorola | Category: Portable Radio | Size: 5.67 MB

Computer Software Copyrights
3
Disclaimer
3
Document Copyrights
3
Product Safety and RF Exposure Compliance
3
Table of Contents
4
List of Figures

9
List of Tables

11
Chapter 1 Test Equipment, Service Aids, and Service Tools

12
Chapter 2 DC Power Distribution

16
Chapter 3 Controller Theory of Operation

18
- Controller
  18
  - Microprocessor Circuitry
    18
    
    Table 3-1. Radio Memory Requirements
    18
    
    Control and Indicator Interface
    19
    
    Memory Usage
    19
    
    Serial Bus Control of Circuit Blocks
    19
    
    Table 3-2. SPI Bus Signal Definitions
    19
    
    Interface to RSS Programming
    20
    
    Microprocessor Power-Up, Power-Down and Reset Routine
    20
    
    Sensing of Externally-Connected Accessories
    20
    
    Storage of Customer-Specific Information
    20
    
    Battery Gauge
    21
    
    Boot Mode Control
    21
    
    Microprocessor 7.3975 Mhz Clock
    21
  - Audio Circuitry
    21
    
    Transmit and Receive Low-Level Audio Circuitry
    21
    
    Audio Power Amplifier
    22
    
    Internal Microphone Audio Voice Path
    22
    
    PTT Circuits
    22
    
    Programming and Flashing through Microphone Jack
    23
    
    VOX Operation
    23
Chapter 4 VHF Theory of Operation

24
- Introduction
  24
- VHF Receiver
  24
  - Receiver Front-End
    24
  - Figure 4-1. VHF Receiver Block Diagram
    24
  - Receiver Back-End
    25
- VHF Transmitter
  26
  - Transmit Power Amplifier
    26
  - Antenna Switch
    26
  - Harmonic Filter
    26
  - Figure 4-2. VHF Transmitter Block Diagram
    26
  - Antenna Matching Network
    27
  - Power Control
    27
- VHF Frequency Generation Circuitry
  27
- Keypad
  30
- Figure 4-5. VHF VCO Block Diagram
  30
- Figure 4-6. Keypad Block Diagram
  30
Chapter 5 VHF Troubleshooting Tables

32
Chapter 6 VHF Schematic Diagrams, Overlays, and Parts Lists

48
Chapter 7 403-440 Mhz UHF Theory of Operation

70
- Introduction
  70
- UHF Receiver
  70
  - Receiver Front End
    70
  - Figure 7-1. UHF Receiver Block Diagram
    70
  - Receiver Back End
    71
- UHF Transmitter
  72
  - Transmitter Power Amplifier
    72
  - Antenna Switch
    72
  - Harmonic Filter
    72
  - Figure 7-2. UHF Transmitter Block Diagram
    72
  - Antenna Matching Network
    73
  - Power Control
    73
- UHF Frequency Generation Circuitry
  73
- Keypad
  76
- Figure 7-5. UHF VCO Block Diagram
  76
- Figure 7-6. Keypad Block Diagram
  76
Chapter 8 438-470 Mhz UHF Theory of Operation

78
- Introduction
  78
- UHF Receiver
  78
  - Receiver Front End
    78
  - Figure 8-1. UHF Receiver Block Diagram
    78
  - Receiver Back End
    79
- UHF Transmitter
  80
  - Transmitter Power Amplifier
    80
  - Antenna Switch
    80
  - Harmonic Filter
    80
  - Figure 8-2. UHF Transmitter Block Diagram
    80
  - Antenna Matching Network
    81
  - Power Control
    81
- UHF Frequency Generation Circuitry
  81
- Keypad
  84
- Figure 8-5. UHF VCO Block Diagram
  84
- Figure 8-6. Keypad Block Diagram
  84
- Introduction
  86
- Figure 9-1. UHF Receiver Block Diagram
  86
Chapter 9 465-495 Mhz UHF Theory of Operation

86
Chapter 10 UHF Troubleshooting Tables

94
Chapter 11 UHF Schematic Diagrams, Overlays, and Parts Lists

110

Motorola EP450 Basic Service Manual (91 pages)

VHF 146-174 MHz; UHF 403-440 MHz; UHF 438-470 MHz; UHF 465-495 MHz

Brand: Motorola | Category: Portable Radio | Size: 5.48 MB

Motorola EP450 Service Manual (126 pages)

Brand: Motorola | Category: Portable Radio | Size: 1.62 MB

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Motorola EP450 Manuals

Motorola EP450 Service Manual (173 pages)

Table of Contents

List of Figures

List of Tables

Chapter 1 Test Equipment, Service Aids, and Service Tools

Chapter 2 DC Power Distribution

Chapter 3 Controller Theory of Operation

Chapter 4 VHF Theory of Operation

Chapter 5 VHF Troubleshooting Tables

Chapter 6 VHF Schematic Diagrams, Overlays, and Parts Lists

Chapter 7 403-440 Mhz UHF Theory of Operation

Chapter 8 438-470 Mhz UHF Theory of Operation

Chapter 9 465-495 Mhz UHF Theory of Operation

Chapter 10 UHF Troubleshooting Tables

Chapter 11 UHF Schematic Diagrams, Overlays, and Parts Lists

Motorola EP450 Basic Service Manual (91 pages)

Table of Contents

List of Figures

List of Tables

Chapter 1 Model Charts and Test Specifications

Chapter 2 Theory of Operation

Chapter 3 Test Equipment, Service Aids, and Service Tools

Chapter 4 Performance Checks

Chapter 5 Radio Alignment Procedures

Chapter 6 Display Model Disassembly and Re-Assembly

Chapter 7 Non-Display Model Disassembly and Re-Assembly

Chapter 8 Troubleshooting Tables

Appendix A Accessories

Appendix B Warranty, Service Support, and Replacement Parts

Glossary

Motorola EP450 Service Manual (126 pages)

Table of Contents

Table of Contents

List of Figures

List of Tables

Chapter 1 Test Equipment, Service Aids, and Service Tools

Chapter 2 DC Power Distribution

Chapter 3 Controller Theory of Operation

Chapter 4 136-162 Mhz VHF Theory of Operation

Chapter 5 146-174 Mhz VHF Theory of Operation

Chapter 6 VHF Troubleshooting Tables

Chapter 7 VHF Schematic Diagrams, Overlays, and Parts Lists

Chapter 8 403-440 Mhz UHF Theory of Operation

Chapter 9 438-470 Mhz UHF Theory of Operation

Chapter 10 465-495 Mhz UHF Theory of Operation

Chapter 11 490-527 Mhz UHF Theory of Operation

Chapter 12 UHF Troubleshooting Tables

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