User ManualTable of ContentsModel Charts and Test Specifications1Radio Model Information1Model Chart for VHF 146-174 MHz1Non-Display Model1Model Chart for UHF 403-440 MHz1Model Chart for UHF 438-470 MHz1Model Chart for UHF 465-495 MHz1Display Model1MIL Standards1Theory Of Operation2Introduction2Major Assemblies22.2.1 Receiver22.2.2 Transmitter2Test Equipment, Service Aids, and Service Tools3Test Equipment3Service Aids3Performance Checks4General4Power-Up Self Test4RF Test Mode4Radio Alignment Procedures5Introduction5CPS Programming Setup5Radio Tuning Setup55.3.1 Initial Test Equipment Control Settings5Transmitter Alignment Options55.4.1 Reference Oscillator Warp55.4.2 Modulation Balance Attenuation5Transmit Power Tuning55.4.3.1 To Perform Transmit High Power Tuning, do the following:55.4.3.2 To Perform Transmit Low Power Tuning, do the following:55.4.4 VCO Attenuation55.4.4.1 VCO Attenuation 25 kHz55.4.4.2 VCO Attenuation 12.5 kHz55.4.4.3 VCO Attenuation 20 kHz55.4.5 DTMF Deviation Tuning55.4.6 MDC-1200 Deviation Tuning5Receiver Tuning55.5.1 Rated Volume Tuning55.5.2 Squelch Tuning55.5.2.1 Manual Squelch Tuning55.5.2.2 Auto Tune55.5.3 RSSI System Level Tuning55.5.4 RSSI Display Tuning5Utilities55.6.1 Program Serial No.55.6.2 Temp Comp Data Read55.6.3 Temp Comp Data Write5Radio-to-Radio Cloning5Display Model Disassembly and Re-assembly6Introduction6Preventive Maintenance66.2.1 Inspection66.2.2 Cleaning Procedures6Safe Handling of CMOS and LDMOS Devices6Disassembling and Re-assembling the Radio — General66.4.1 Radio Disassembly — Detailed66.4.1.1 Front Cover From Chassis Disassembly66.4.1.2 Dust Cover Disassembly66.4.1.3 Speaker and Microphone Disassembly66.4.1.4 Keyboard Removal66.4.1.5 PTT Disassembly66.4.1.6 Chassis Disassembly66.4.2 Radio Re-assembly - Detailed66.4.2.1 Dust Cover Re-assembly66.4.2.2 Microphone and Speaker Re-assembly66.4.2.3 Keypad and LCD/Keyboard Re-assembly66.4.2.4 Keyboard Retainer Re-assembly66.4.2.5 Chassis Assembly/Re-assembly66.4.2.6 Chassis and Front Cover Re-assembly66.4.2.7 PTT Re-assembly6Mechanical View and Parts List66.5.1 EP450 Display Model Exploded View and Parts List6Non-Display Model Disassembly and Re-assembly7Introduction7Preventive Maintenance77.2.1 Inspection77.2.2 Cleaning Procedures7Safe Handling of CMOS and LDMOS Devices7Disassembling and Re-assembling the Radio — General77.4.1 Radio Disassembly — Detailed77.4.1.1 Front Cover From Chassis Disassembly77.4.1.2 Dust Cover Disassembly77.4.1.3 Speaker and Microphone Disassembly77.4.1.4 PTT Disassembly77.4.2 Chassis Disassembly77.4.3 Radio Re-assembly - Detailed77.4.3.1 Dust Cover Re-assembly77.4.3.2 Microphone and Speaker Re-assembly77.4.3.3 Chassis Assembly/Re-assembly77.4.3.4 Chassis and Front Cover Re-assembly77.4.3.5 PTT Re-assembly7Mechanical View and Parts List77.5.1 EP450 Non-Display Exploded View and Parts List7Troubleshooting Tables8Power-Up Error Codes8Operational Error Codes8Troubleshooting Table for Receiver8Troubleshooting Table for Transmitter8Scope of Manual1Warranty11.2.1 Warranty Period and Return Instructions11.2.2 After Warranty Period1Replacement Parts Ordering11.3.1 Basic Ordering Information11.3.2 Motorola Online11.3.3 Mail Orders11.3.4 Telephone Orders11.3.5 Fax Orders11.3.6 Parts Identification1Technical Support1Major Assemblies Block Diagram2Transceiver Block Diagram2Programming/Test Cable3Wiring of the Connectors3Radio Tuning Setup4Side Button Locations4CPS Programming Setup5Radio Tuning Setup5Reference Oscillator Warp Window5Modulation Balance Window5Transmit Power Window (High Power)5VCO Attenuation Window (12.5 kHz)5DTMF Deviation Tuning Window5MDC-1200 Deviation Tuning Window5Rated Volume Tuning Window5Squelch Tuning Window5RSSI Tuning5Side Button Locations5Battery Removal6Antenna and Knob Removal6Chassis Removal6Keyboard Flex Connection6Microphone and Speaker Connections6Dust Cover Disassembly6Removal Speaker-Microphone Assembly6Keypad Removal6PTT Removal6Removal of Main Board from Chassis6Dust Cap Re-assembly6Microphone Re-assembly6Speaker Re-assembly6Keypad Re-assembly6LCD/Keypad Board Re-assembly6Keyboard Retainer Re-assembly6Main Board onto Chassis Re-assembly6Microphone and Speaker Wires Re-assembly6Keyboard Flex Cable Connection6Fastening the Chassis6PTT Re-assembly6EP450 Full Keypad Radio Exploded View6Battery Removal7Antenna and Knob Removal7Chassis Removal7Microphone and Speaker Connections7Dust Cover Disassembly7Removal Speaker-Microphone Assembly7PTT Removal7Removal of Main Board from Chassis7Dust Cap Re-assembly7Microphone Re-assembly7Speaker Re-assembly7Installation of Main Board onto Chassis7Microphone and Speaker Wires Re-assembly7Fastening the Chassis7PTT Re-assembly7EP450 Non-Display Radio Exploded View7Radio Model Number (Example: LAH65KDC9AA2AN)1MIL STDS 810 C, D, E, and F: Applicable to UHF and VHF Specifications1Recommended Test Equipment3Service Aids3Recommended Service Tools3Initial Equipment Control Settings4Test Environments4Test Channel Spacing4Test Frequencies4Receiver Performance Checks4Transmitter Performance Checks4Initial Equipment Control Settings5Reference Oscillator Specifications5Transmit High/Low Power Level5Deviation Specifications5Squelch Deviation Values5Power-Up Error Code Display8Operational Error Code Display8Receiver Troubleshooting Table8Transmitter Troubleshooting Table8Size: 5.18 MBPages: 91Language: EnglishOpen manual