Motorola Portable Radio Ep450 Detailled Hkln4216c Manual
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HKLN4216CJune, 2005 INDEX: 5 U UHF Schematic Diagrams, Overlays, and Parts Lists ......................................................12-1 Introduction..................................................................................................................12-1 Notes For All Schematics and Circuit Boards........................................................12-1 Six Layer Circuit Board ..........................................................................................12-3 Speaker and Microphone Schematic...........................................................................12-3 Speaker and Microphone Parts List.......................................................................12-3 UHF 403-440 MHz Theory Of Operation.............................................................................8-1 Introduction....................................................................................................................8-1 UHF Receiver ................................................................................................................8-1 Receiver Front End............................................................................................8-1 Receiver Back End ............................................................................................8-2 UHF Transmitter ............................................................................................................8-3 Transmitter Power Amplifier ..............................................................................8-3 Antenna Switch..................................................................................................8-3 Harmonic Filter ..................................................................................................8-3 Antenna Matching Network.....................................................................................8-4 Power Control ..........................................................................................................8-4 UHF Frequency Generation Circuitry ............................................................................8-4 Fractional-N Synthesizer .........................................................................................8-5 Voltage Controlled Oscillator (VCO) ........................................................................8-6 Keypad ..........................................................................................................................8-7 UHF 438-470 MHz Theory Of Operation.............................................................................9-1 Introduction....................................................................................................................9-1 UHF Receiver ................................................................................................................9-1 Receiver Front End..................................................................................................9-1 Receiver Back End ..................................................................................................9-2 UHF Transmitter ............................................................................................................9-3 Transmitter Power Amplifier ....................................................................................9-3 Antenna Switch........................................................................................................9-3 Harmonic Filter ........................................................................................................9-3 Antenna Matching Network .....................................................................................9-4 Power Control ..........................................................................................................9-4 UHF Frequency Generation Circuitry ............................................................................9-4 Fractional-N Synthesizer .........................................................................................9-5 Voltage Controlled Oscillator (VCO) ........................................................................9-6 Keypad ..........................................................................................................................9-7 UHF 465-495 MHz Theory Of Operation...........................................................................10-1 Introduction..................................................................................................................10-1 UHF Receiver ..............................................................................................................10-1 Receiver Front End................................................................................................10-1 Receiver Back End ................................................................................................10-2 UHF Transmitter ..........................................................................................................10-3 Transmitter Power Amplifier ..................................................................................10-3 Antenna Switch......................................................................................................10-3 Harmonic Filter ......................................................................................................10-3 Antenna Matching Network ...................................................................................10-4 Power Control ........................................................................................................10-4 UHF Frequency Generation Circuitry ..........................................................................10-4
June, 2005HKLN4216C 6INDEX: Fractional-N Synthesizer ....................................................................................... 10-5 Voltage Controlled Oscillator (VCO) ...................................................................... 10-6 Keypad ........................................................................................................................ 10-7 UHF 490-527 MHz Theory Of Operation .......................................................................... 11-1 Introduction ................................................................................................................. 11-1 UHF Receiver.............................................................................................................. 11-1 Receiver Front End ............................................................................................... 11-1 Receiver Back End ................................................................................................ 11-2 UHF Transmitter .......................................................................................................... 11-3 Transmitter Power Amplifier .................................................................................. 11-3 Antenna Switch ..................................................................................................... 11-3 Harmonic Filter ...................................................................................................... 11-3 Antenna Matching Network ................................................................................... 11-4 Power Control........................................................................................................ 11-4 UHF Frequency Generation Circuitry .......................................................................... 11-4 Fractional-N Synthesizer ....................................................................................... 11-5 Voltage Controlled Oscillator (VCO) ...................................................................... 11-6 Keypad ........................................................................................................................ 11-7 UHF Troubleshooting Tables............................................................................................. 12-1 Troubleshooting Table for Receiver............................................................................. 12-1 Troubleshooting Table for Synthesizer ........................................................................ 12-3 Troubleshooting Table for Transmitter ......................................................................... 12-4 Troubleshooting Table for Board and IC Signals ......................................................... 12-6 V VHF Schematic Diagrams, Overlays, and Parts Lists ........................................................ 7-1 Introduction ...................................................................................................................7-1 Notes For All Schematics and Circuit Boards ......................................................... 7-1 Six Layer Circuit Board............................................................................................ 7-3 Speaker and Microphone Schematic ............................................................................ 7-3 Speaker and Microphone Parts List ........................................................................ 7-3 VHF 136-162 MHz Theory Of Operation............................................................................. 4-1 Introduction ...................................................................................................................4-1 VHF Receiver ................................................................................................................ 4-1 Receiver Front-End ................................................................................................. 4-1 Receiver Back-End.................................................................................................. 4-2 VHF Transmitter ............................................................................................................ 4-3 Transmit Power Amplifier ........................................................................................ 4-3 Antenna Switch ....................................................................................................... 4-3 Harmonic Filter ........................................................................................................ 4-3 Antenna Matching Network ..................................................................................... 4-4 Power Control.......................................................................................................... 4-4 VHF Frequency Generation Circuitry ............................................................................ 4-4 Fractional-N Synthesizer ......................................................................................... 4-5 Voltage Controlled Oscillator (VCO) ........................................................................ 4-6 Keypad ..........................................................................................................................4-7 VHF 146-174 MHz Theory Of Operation............................................................................. 5-1 Introduction ...................................................................................................................5-1 VHF Receiver ................................................................................................................ 5-1
HKLN4216CJune, 2005 INDEX: 7 Receiver Front-End .................................................................................................5-1 Receiver Back-End ..................................................................................................5-2 VHF Transmitter ............................................................................................................5-3 Transmit Power Amplifier ........................................................................................5-3 Antenna Switch........................................................................................................5-3 Harmonic Filter ........................................................................................................5-3 Antenna Matching Network .....................................................................................5-4 Power Control ..........................................................................................................5-4 VHF Frequency Generation Circuitry ............................................................................5-4 Fractional-N Synthesizer .........................................................................................5-5 Voltage Controlled Oscillator (VCO) ........................................................................5-6 Keypad ..........................................................................................................................5-7 VHF Troubleshooting Tables ...............................................................................................6-1 Troubleshooting Table for Receiver ...............................................................................6-1 Troubleshooting Table for Synthesizer ..........................................................................6-3 Troubleshooting Table for Transmitter ...........................................................................6-4 Troubleshooting Table for Board and IC Signals ...........................................................6-6 Voltage Controlled Oscillator (VCO), UHF 403-440 MHz Theory Of Operation ..................8-6 Voltage Controlled Oscillator (VCO), UHF 438-470 MHz Theory Of Operation ..................9-6 Voltage Controlled Oscillator (VCO), UHF 465-495 MHz Theory Of Operation ................10-6 Voltage Controlled Oscillator (VCO), UHF 490-527 MHz Theory Of Operation ................ 11-6 Voltage Controlled Oscillator (VCO), VHF 136-162 MHz Theory Of Operation ..................4-6 Voltage Controlled Oscillator (VCO), VHF 146-174 MHz Theory Of Operation ..................5-6 VOX Operation Controller Theory of Operation ..................................................................3-6 W X Y Z
*H KLN42 16C * HKLN421 6C EP4 50 ™ Po rtab le R ad io Detailed Service Manual MOTOROLA and the St ylized M Lo go are re gistered in the U.S. Patent and Trademark Office . All other product or service names are the propert y of their respective owners . © Motorola, Inc. 2005©