Document Outline

• Description & Specifications 1 1
• Installation 2 1
• Operation 3 1
• Maintenance 4 1
• Parts Lists 5 1
• Diagrams 6 1
• Description & Specifications
  • Description
    • General
    • Features
    • Front Panel Features
      • Channel Selector and Operation Buttons
      • Volume Controls
      • Sidetone Nulling Trimmers
    • Connections, Inputs and Outputs
      • Front Panel
        • Panel Microphone Jack
    • Rear Panel Features
      • Intercom Lines
      • External Program Input
      • Speaker Output
      • Auxiliary Connector
    • Programming
    • Power
    • Mounting Configuration
  • MCE325 Specifications
    • General
    • Microphone Preamplifier
    • Headphone Amplifier
    • Speaker Amplifier
    • Power and Mechanical
    • Connectors
  • MCS325 Specifications
• Installation
  • Internal Programming and Adjustments
    • General
    • Intercom Line-Channel Configurations (DS1-DS3, J6, J7, J19 & J20)
    • Front Panel Setup Mode Lock-out (DS4)
    • ISO (DS5)
    • Remote Talk-off (DS7)
    • VOX (DS8)
    • Program Assignment – IFB Option (J4, J5, J16-J18)
    • Balanced/Unbalanced Dynamic Microphone Selection (J24)
    • Headphone Sidetone Trimmer Adjustment (R37)
    • Speaker Dim Adjustment (R157)
  • Mechanical Installation
  • Electrical Installation
    • AC Power and Fuse
    • Intercom Lines J8, J9, and J10
      • General
      • Connector Pin-outs
      • Four-wire Output Termination
    • Program Inputs, J14 and J15
    • External Speaker, J27
    • Auxiliary Connector, J22
      • Four-Wire Channel A and B Input
      • Key outputs – Expanded IFB Option
      • Remote Microphone Switch
      • ISO Connection
      • External Headset
      • External Electret Microphone
      • Unswitched Microphone Output
      • External DC Power Source
      • Remote Speaker Mute Control
    • Front Panel Headset Connections
      • Headset Requirements
      • Headset Connections
• Operation
  • General
  • Operating Instructions
    • Momentary/Latching Button action
    • LED Indicators
    • Channel Selection
    • Panel Mic/Headset Mic Selection
    • Microphone On/Off
    • Speaker On/Off
    • Volume Adjustment
    • Front Panel Sidetone Nulling Trimmer Adjustment
    • Sending and Receiving Call Signals
    • Using the Talk-Off Feature
  • Front Panel Programming
    • Activating Setup Mode
    • Menu Selection/Ending Setup
    • Submenus
      • Channel ID
      • Four-channel Listen
      • Mono
      • Call Disable
      • Button Lock
      • Latch Disable
      • Instant Mic
      • Reset
• Maintenance
  • Preventive Maintenance
  • Factory Support Information
  • Corrective Maintenance
    • Access
    • Front Panel Removal
    • Cleaning
  • Test and Adjustment Procedures
    • Notes
    • Test Equipment
    • Power Supply Test
    • Initial Configuration
    • Keying Output Test
    • USMB (Un-Switched Microphone Balanced) Frequency Response and Level Check
    • Frequency Response and Level Check, Mic to Line
      • Four-Channel, Two-Wire Mode
      • Two-Channel, Four-Wire Mode
    • Sidetone Null Test and Adjustment
    • True Sidetone Adjust
    • Level and Frequency Response Check, Intercom Channel to Headphone
    • Level and Frequency Response Check, Intercom Channel to Speaker
    • Level and Frequency Response, Program to Headphones and Speaker
      • Program A to Left Headphone
      • Program B to Right Headphone
      • Program to Speaker
    • IFB Test
      • IFB B
      • IFB A
    • Level and Frequency Response Check, Four-Wire Input to Headphone
      • Four-Wire A Input to Left Headphone
      • Four-Wire B input to Right Headphone
    • Panel Mic to Channel Test
    • Carbon Mic to Channel Test
    • VOX Test
    • Mic Kill Receive Test
    • Mic Kill Transmit Test
    • Call Transmit Test
    • Call Receive Test
    • ISO Test
    • Remote Mic Switch Test
    • Program Lockout Test
    • Noise Checks
• Parts Lists
  • Packaging Assembly (9000-6464-00)
  • Final Assembly, MCE325 (9010-6464-00)
  • Front Panel Assembly (9020-6261-00)
  • Back Panel Assembly (9020-6262-00)
  • Heatsink Assembly (9020-6324-00)
  • Main PC Board Assembly (9030-6245-01)
  • PC Board Assembly, Front Panel (9030-6246-00)
• Diagrams