Motorola EP450 Service Manual

x Table of Contents
November 24, 2003 HKLN4216A
List of Figures
Figure 1-1. Programming/Test Cable.................................................................................................. 1-4
Figure 1-2. Wiring of the Connectors .................................................................................................. 1-4
Figure 2-1. DC Power Distribution Block Diagram.............................................................................. 2-1
Figure 4-1. VHF Receiver Block Diagram...........................................................................................4-1
Figure 4-2. VHF Transmitter Block Diagram....................................................................................... 4-3
Figure 4-3. VHF Frequency Generation Unit Block Diagram.............................................................. 4-5
Figure 4-4. VHF Synthesizer Block Diagram ...................................................................................... 4-6
Figure 4-5. VHF VCO Block Diagram ................................................................................................. 4-7
Figure 4-6. Keypad Block Diagram ..................................................................................................... 4-7
Figure 6-1. Six-Layer Circuit Board: Copper Steps in Layer Sequence.............................................. 6-3
Figure 6-2. Speaker and Microphone Schematic................................................................................ 6-3
Figure 6-3. VHF (146-174 MHz) Radio Circuit Block Interconnect Diagram....................................... 6-5
Figure 6-4. VHF (146-174 MHz) PCB 8486342Z13-C Receiver Front End Schematic Diagram........ 6-6
Figure 6-5. VHF (146-174 MHz) Receiver Back End Schematic Diagram ......................................... 6-7
Figure 6-6. VHF (146-174 MHz) PCB 8486342Z13-C Synthesizer Schematic Diagram.................... 6-8
Figure 6-7. VHF (146-174 MHz) Voltage Controlled Oscillator Schematic Diagram .......................... 6-9
Figure 6-8. VHF (146-174 MHz) PCB 8486342Z13-C Transmitter and Power Control
Schematic Diagram ........................................................................................................ 6-10
Figure 6-9. VHF (146-174 MHz) Controller Interconnect Schematic Diagram.................................. 6-11
Figure 6-10. VHF (146-174 MHz) PCB 8486342Z13-C Microprocessor Circuitry
Schematic Diagram ........................................................................................................ 6-12
Figure 6-11. VHF (146-174 MHz) Audio Circuitry Schematic Diagram............................................... 6-13
Figure 6-12. VHF (146-174 MHz) PCB 8486342Z13-C DC Regulation Schematic Diagram ............ 6-14
Figure 6-13. VHF (146-174 MHz) Keypad Board Schematic Diagram ............................................... 6-15
Figure 6-14. VHF (146-174 MHz) PCB 8486342Z13-C Board Component Side................................ 6-16
Figure 6-15. VHF (146-174 MHz) Board Solder Side View ................................................................ 6-17
Figure 6-16. VHF (146-174 MHz) PCB 8486342Z13-C Keypad Board .............................................. 6-18
Figure 7-1. UHF Receiver Block Diagram...........................................................................................7-1
Figure 7-2. UHF Transmitter Block Diagram....................................................................................... 7-3
Figure 7-3. UHF Frequency Generation Unit Block Diagram.............................................................. 7-5
Figure 7-4. UHF Synthesizer Block Diagram ...................................................................................... 7-6
Figure 7-5. UHF VCO Block Diagram ................................................................................................. 7-7
Figure 7-6. Keypad Block Diagram ..................................................................................................... 7-7
Figure 8-1. UHF Receiver Block Diagram...........................................................................................8-1
Figure 8-2. UHF Transmitter Block Diagram....................................................................................... 8-3
Figure 8-3. UHF Frequency Generation Unit Block Diagram.............................................................. 8-5
Figure 8-4. UHF Synthesizer Block Diagram ...................................................................................... 8-6
Figure 8-5. UHF VCO Block Diagram ................................................................................................. 8-7
Figure 8-6. Keypad Block Diagram ..................................................................................................... 8-7
Figure 9-1. UHF Receiver Block Diagram...........................................................................................9-1
Figure 9-2. UHF Transmitter Block Diagram....................................................................................... 9-3
Figure 9-3. UHF Frequency Generation Unit Block Diagram.............................................................. 9-5
Figure 9-4. UHF Synthesizer Block Diagram ...................................................................................... 9-6
Figure 9-5. UHF VCO Block Diagram ................................................................................................. 9-7
Figure 9-6. Keypad Block Diagram ..................................................................................................... 9-7
Figure 11-1. Six-Layer Circuit Board: Copper Steps in Layer Sequence............................................ 11-3
Figure 11-2. Speaker and Microphone Schematic.............................................................................. 11-3
Figure 11-3. UHF (403-440 MHz) Radio Circuit Block Diagram ......................................................... 11-5
Figure 11-4. UHF (403-440 MHz) PCB 8486635Z03-O Receiver Front End Schematic Diagram .....11-6
Figure 11-5. UHF (403-440 MHz) Receiver Back End Schematic Diagram ....................................... 11-7

Motorola EP450 Specifications

General

Channel Capacity	16 channels
Operating Temperature	-30°C to +60°C
IP Rating	IP54
Frequency Range	VHF: 136-174 MHz, UHF: 403-470 MHz
Weight	Approximately 350g (with standard battery)