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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 
    						
    							June, 2005HKLN4216C
    Notes:
    8INDEX:  
    						
    							*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© 
    						
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