E.F. Johnson Company 751 series Manuals

Manuals and User Guides for E.F. Johnson Company 751 series. We have 1 E.F. Johnson Company 751 series manual available for free PDF download: User Manual

E.F. Johnson Company 751 series User Manual

E.F. Johnson Company 751 series User Manual (70 pages)

CONVENTIONAL TWO-WAY RADIO

Brand: E.F. Johnson Company | Category: Two-Way Radio | Size: 1.1 MB

Table of Contents

Table of Contents
2
1 General Information

5
- Scope of Manual
  5
- Transceiver Description
  5
- Part Number Breakdown
  5
- Transceiver Identification
  5
- Accessories
  5
- Product Warranty
  5
- Factory Customer Service
  6
- 75Xx Accessories
  6
- Factory Returns
  7
- Replacement Parts
  7
- Internet Home Page
  7
- Installing Option Unit
  7
- Option Unit Installation
  7
- Two-Tone Decoder Setup
  8
  - Installation and Programming
    8
  - Setting Tone Frequencies
    8
- Two-Tone Decoder Adjustment Points
  8
- Five-Tone Encoder/Decoder Setup
  9
  - Installation and Programming
    9
  - Setting 5-Tone Deviation
    9
- Radio Disassembly Procedure
  10
  - Removing Chassis
    10
  - Removing Main Unit from Chassis
    10
- Chassis Removal
  10
- Main Unit Removal from Chassis
  10
- Revision Summary
  11
  - General
    11
  - Software Revisions
    11
  - VHF (7510) Hardware Revisions
    11
  - UHF (7540) Hardware Revisions
    11
- Specifications
  
  12
2 Transceiver Operation

13
- Transceiver Features
  13
- Controls and Display
  13
- Getting Started
  14
  - Unpacking
    14
  - Antenna
    14
  - Belt Clip
    14
  - Turning Power on
    14
  - Changing Channel
    14
  - Adjusting Volume
    15
- Basic Operation
  15
  - Receiving a Call
    15
  - Transmitting a Call
    15
  - Low Battery Indication
    15
  - Time-Out Timer
    15
  - Selective Calling
    15
- Programmable Functions
  16
  - General
    16
  - Keypad Lock
    16
  - Priority Channel
    16
  - Scan
    16
  - Key Beep
    16
  - Monitor
    16
  - Talk-Around
    17
  - DTMF Transmission
    17
  - DTMF Redial
    17
  - High/Low Power Output
    17
  - Emergency Operation
    17
  - Display Lighting
    17
- Battery Information
  17
  - Battery Pack Replacement
    17
  - Miscellaneous Battery Information
    18
  - Using Battery Case
    18
  - Battery Charging Information
    18
  - Using Desktop Charger
    19
  - Using Multi-Unit Charger
    19
  - Using Wall Charger
    19
  - Using Optional Cables
    20
  - Replacement Battery Pack
    20
3 Programming

21
- General
  21
  - Programming Setup
    21
  - Programming Cable
    21
  - Programming Software
    21
  - Software Version Required
    22
- Starting the Program
  22
- Special Keys and Functions
  
  22
  - Menu Flow
    22
    
    Introduction
    22
    
    File Menu
    22
    
    Screen Menu
    23
    
    Program Menu
    23
    
    Print Menu
    23
    
    Model Menu
    24
    
    Setup Menu
    24
  - Memory Channel Screen Description (LMR Models)
    24
  - Key and Display Assign Screen Description
    26
  - Continuous Tone Screen Description
    29
  - DTMF Autodial Screen Description
    29
  - Scan Function Screen Description
    30
  - Tone Code Channel Screen Description
    31
  - Common Screen Description
    32
  - Expert Screen Description
    33
  - Unique Pmr (European) Screens
    34
    
    General
    34
    
    Unique PMR Screens
    34
  - Memory Channel Screen (PMR Models)
    35
  - Cloning (Programming One Transceiver with Another)
    36
4 Circuit Description

37
- Receiver Circuit
  37
  - Antenna Switching Circuit
    37
  - RF Circuit
    37
  - First Mixer and First if Circuit
    37
  - Second if and Demodulator Circuits
    37
  - AF Circuit
    38
  - Squelch Circuit
    38
- Transmitter Circuits
  38
  - Microphone Amplifier Circuit
    38
  - Modulation Circuit
    38
- Second if and Demodulator Circuits
  38
  - Drive/Power Amplifier Circuits
    39
  - Current Detector Circuit
    39
  - Power Detector (UHF Only)
    39
  - APC Circuit
    39
- Pll Circuit
  40
- Power Supply Circuits
  40
- Cpu Port Allocation
  41
- Output Expander Ic10 Allocations
  41
5 Adjustment Procedure

43
- General
  43
  - Required Test Equipment
    43
- Test Setup
  43
  - Test Channels and Power Select
    44
  - Computer-Aided Tuning
    44
- Test Frequencies
  44
  - Reprogramming if EEPROM Is Replaced or Error Occurs
    45
- Preliminary Setup
  45
- Pll Adjustment (Vhf Models)
  46
- Transmitter Adjustments (Vhf Models)
  46
  - Reference Frequency
    46
  - Output Power Adjust
    47
  - FM Deviation Adjust
    47
  - DTCS Waveform Adjust
    47
- Receiver Adjustments (Vhf Models)
  47
  - Bandpass Filter Adjust
    47
  - Squelch Adjust
    48
- Pll Adjustment (Uhf Models)
  49
- Transmitter Adjustments
  49
- Models)
  
  49
  - Reference Frequency
    49
  - DTCS Waveform Adjust
    50
  - FM Deviation Adjust
    50
  - Output Power Adjust
    50
  - Receiver Adjustments (Uhf Models)
    51
    
    Bandpass Filter Adjust
    51
    
    Squelch Adjust
    52
7 Schematic Diagrams and

53
6 Parts List

53
- VHF Main Unit Parts List
  53
- 7510 (Vhf) Main Unit
  
  53
- 7540 (Uhf) Main Unit
  
  61

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