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Table of Contents

List of Figures

Figure 2-1.

Major Assemblies Block Diagram

2-1

Figure 2-2.

Transceiver Block Diagram

2-2

Figure 3-1.

Programming/Test Cable

3-4

Figure 3-2.

Wiring of the Connectors

3-4

Figure 4-1.

Radio Tuning Setup

4-1

Figure 4-2.

Side Button Locations

4-2

Figure 5-1.

CPS Programming Setup

5-1

Figure 5-2.

Radio Tuning Setup

5-2

Figure 5-3.

Reference Oscillator Warp Window

5-3

Figure 5-4.

Modulation Balance Window

5-4

Figure 5-5.

Transmit Power Window (High Power)

5-5

Figure 5-6.

VCO Attenuation Window (12.5 kHz)

5-7

Figure 5-7.

DTMF Deviation Tuning Window

5-9

Figure 5-8.

MDC-1200 Deviation Tuning Window

5-10

Figure 5-9.

Rated Volume Tuning Window

5-11

Figure 5-10.

Squelch Tuning Window

5-12

Figure 5-11.

RSSI Tuning

5-13

Figure 5-12.

Side Button Locations

5-15

Figure 6-1.

Battery Removal

6-3

Figure 6-2.

Antenna and Knob Removal

6-4

Figure 6-3.

Chassis Removal

6-4

Figure 6-4.

Keyboard Flex Connection

6-5

Figure 6-5.

Microphone and Speaker Connections

6-5

Figure 6-6.

Dust Cover Disassembly

6-6

Figure 6-7.

Removal Speaker-Microphone Assembly

6-6

Figure 6-8.

Keypad Removal

6-7

Figure 6-9.

PTT Removal

6-8

Figure 6-10.

Removal of Main Board from Chassis

6-8

Figure 6-11.

Dust Cap Re-assembly

6-9

Figure 6-12.

Microphone Re-assembly

6-10

Figure 6-13.

Speaker Re-assembly

6-10

Figure 6-14.

Keypad Re-assembly

6-11

Figure 6-15.

LCD/Keypad Board Re-assembly

6-11

Figure 6-16.

Keyboard Retainer Re-assembly

6-12

Figure 6-17.

Main Board onto Chassis Re-assembly

6-13

Figure 6-18.

Microphone and Speaker Wires Re-assembly

6-14

Figure 6-19.

Keyboard Flex Cable Connection

6-14

Figure 6-20.

Fastening the Chassis

6-15

Figure 6-21.

PTT Re-assembly

6-15

Figure 6-22.

EP450 Full Keypad Radio Exploded View

6-16

Figure 7-1.

Battery Removal

7-3

Figure 7-2.

Antenna and Knob Removal

7-4

Figure 7-3.

Chassis Removal

7-4

Figure 7-4.

Microphone and Speaker Connections

7-5

Figure 7-5.

Dust Cover Disassembly

7-5

Figure 7-6.

Removal Speaker-Microphone Assembly

7-6

Figure 7-7.

PTT Removal

7-7

Figure 7-8.

Removal of Main Board from Chassis

7-7

Figure 7-9.

Dust Cap Re-assembly

7-8

Figure 7-10.

Microphone Re-assembly

7-8

December 3, 2003

HKLN4215A

Page 7
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Motorola EP450 service manual List of Figures

EP450 specifications

The Motorola EP450 is a robust and reliable two-way radio that has made a significant impact in the world of professional communications. Known for its solid construction and exceptional performance, the EP450 is a popular choice among various industries, including security, transportation, and event management.

One of the standout features of the Motorola EP450 is its impressive audio quality. Equipped with advanced audio processing technologies, the radio offers clear and crisp sound, ensuring effective communication even in noisy environments. This feature is particularly beneficial for users who work in fields where situational awareness and timely communication are crucial.

The EP450 operates on both VHF and UHF frequency bands, making it versatile for various communication needs. With 16 channels and a wide frequency range, users can easily switch between channels to avoid interference and ensure secure communications. Additionally, the radio offers a programmable feature, allowing users to customize button functions and settings, which enhances the overall user experience.

The battery life of the EP450 is another notable characteristic. It comes powered with a long-lasting rechargeable battery that provides extended usage on a single charge. This ensures that users can rely on the device throughout their shifts without concerns about running out of power. Furthermore, the EP450 features a battery save mode that helps conserve energy when the radio is not in use.

In terms of design, the Motorola EP450 is built to withstand tough environments. Its rugged housing is dustproof and can withstand exposure to water, making it suitable for outdoor use. Additionally, the radio's user-friendly interface includes a large display and oversized buttons, allowing users to operate it easily even with gloves or in challenging conditions.

Furthermore, the EP450 supports various accessories, such as headsets and external microphones, enhancing usability and flexibility in various operational scenarios. This adaptability allows users to customize their communication solutions based on specific needs.

In conclusion, the Motorola EP450 stands out for its superior audio quality, versatile frequency operation, long-lasting battery life, and rugged design. These features make it an indispensable tool for professionals who require reliable communication in demanding environments, proving its value across a multitude of industries.