PROGRAMMABLE USER STATION
MODEL MCE325
USER INSTRUCTIONS
UNPACKING AND INSPECTION
WARRANTY INFORMATION
PROPRIETARY NOTICE
COPYRIGHT NOTICE
RETURN SHIPPING INSTRUCTIONS
End-UserLicense Agreement for Telex Software
Installation
TABLE OF CONTENTS
Description & Specifications
Operation
Maintenance
Diagrams
Parts Lists
Page
General
DESCRIPTION & SPECIFICATIONS
Features
Description
Channel Selector and Operation Buttons
Front Panel Features
Volume Controls
Connections, Inputs and Outputs
External Program Input
Rear Panel Features
Intercom Lines
Programming
Power
Mounting Configuration
Auxiliary Connector
Headphone Amplifier
MCE325 Specifications
Power and Mechanical
Microphone Preamplifier
Connectors
MCS325 Specifications
Figure 1.3 Standard four-channel, two-wireconfiguration
1-8 M C E 3 2 5 U s e r I n s t r u c t i o n s
Figure 1.8 Multiple interconnected stations using one four-wireintercom channel and two two-wirechannels for IFB’s
1-10 M C E 3 2 5 U s e r I n s t r u c t i o n s
Figure 1.11 MCE325 button configurations
1-12 M C E 3 2 5 U s e r I n s t r u c t i o n s
S E C T I O N
INSTALLATION
Internal Programming and Adjustments
General
Figure 2.1 Top cover removal
Switch Number
Switch Function
Default Setting
Jumper Function
Table 2.2 Jumper functions and default settings
Default Setting
Jumper Number
2-4 C S I - 2 0 0 U s e r I n s t r u c t i o n s
VOX DS8
Front Panel Setup Mode Lock-outDS4
ISO DS5
Remote Talk-offDS7
Program Assignment - IFB Option J4, J5, J16-J18
Mechanical Installation
Headphone Sidetone Trimmer Adjustment R37
Speaker Dim Adjustment R157
Figure 2.3 Mounting configurations
Four-wireOutput Termination
Electrical Installation
AC Power and Fuse
Connector Pin-outs
External Speaker, J27
Auxiliary Connector, J22
Four-WireChannel A and B Input
Program Inputs, J14 and J15
External Headset
Remote Microphone Switch
Key outputs - Expanded IFB Option
ISO Connection
External Electret Microphone
Front Panel Headset Connections
Unswitched Microphone Output
External DC Power Source
Carbon microphone
Table 2.9 Carbon-microphoneheadset connector
SECTION
FUNCTION
Operating Instructions
LED Indicators
OPERATION
General
Microphone On/Off
Volume Adjustment
Front Panel Sidetone Nulling Trimmer Adjustment
Panel Mic/Headset Mic Selection
Menu Selection/Ending Setup
Sending and Receiving Call Signals
Using the Talk-OffFeature
Activating Setup Mode
Four-channelListen
Call Disable
Latch Disable
Channel ID
Instant Mic
Reset
3-6 C S I - 2 0 0 U s e r I n s t r u c t i o n s
Access
MAINTENANCE
Preventive Maintenance
Corrective Maintenance
Test Equipment
Test and Adjustment Procedures
Cleaning
Power Supply Test
Keying Output Test
Initial Configuration
Frequency Response and Level Check, Mic to Line
Four-Channel, Two-WireMode
Two-Channel, Four-WireMode
Sidetone Null Test and Adjustment
True Sidetone Adjust
Program A to Left Headphone
IFB B
IFB Test
Program B to Right Headphone
Program to Speaker
IFB A
Four-WireA Input to Left Headphone
Four-WireB input to Right Headphone
Mic Kill Receive Test
Panel Mic to Channel Test
Carbon Mic to Channel Test
VOX Test
Call Receive Test
Mic Kill Transmit Test
Call Transmit Test
Noise Checks
Remote Mic Switch Test
ISO Test
Program Lockout Test
15Turn all buttons off
Page
S E C T I O N
PARTS LISTS
Packaging Assembly
Final Assembly, MCE325
Description
Front Panel Assembly
Table 5.3 Reference AS6261 Drawing, Section
Item No
Item No
Back Panel Assembly
Heatsink Assembly
Main PC Board Assembly
C104
Capacitor, EL, 10µF
Capacitor, Mylar, 1nF
Diode, 1N4004
Transistor, 2N5210
R170
R267
Resistor, CF, 22K Ohm, 5%, 1/8W
IC, Dual Low-noise Op-Amp,NE5532N
Description
PC Board Assembly, Front Panel
Table 5.7 Reference AS6246 Drawing, Section
Ref No
Page
S E C T I O N
DIAGRAMS
6-2 C S I - 2 0 0 U s e r I n s t r u c t i o n s
Time 05 20 45 PM
Date 7/23/01
Title D \TEMP\AS6246 01B.cal
Date 7/23/01
Title D \TEMP\AS6245 01D.cal
Time 05 27 24 PM
Date 7/23/01
Title D \TEMP\AS6261 01C.cal
Time 05 21 25 PM
Date 7/23/01
Title D \TEMP\AS6262 01C.cal
Time 05 22 16 PM
Title C \home\cms\benedil\view\9020-6324 01.DWG
Date 7/19/01
Time 02 05 07 PM
Date 7/23/01
Title D \TEMP\AS6464 01G.dwg
Time 05 23 05 PM
Date 7/23/01
Title D \TEMP\BD6464 01A.cal
Time 05 23 33 PM
Date 7/23/01
Title D \TEMP\IS6718 01A.cal
Time 05 24 13 PM
Date 7/23/01
Title D \TEMP\OD6355 01A.cal
Time 05 24 51 PM
Date 7/23/01
Title D \TEMP\OD6355 02A.cal
Time 05 25 30 PM
Date 7/23/01
Title D \TEMP\OD6355 03A.cal
Time 05 26 07 PM
Date 7/23/01
Title D \TEMP\OD6355 04A.cal
Time 05 26 42 PM
Date 7/23/01
Title c \home\cms\benedil\view\9000-6464 01.CAL
Time 05 03 09 PM
9027624501
SCHEMATIC DIAGRAM
MOTHERBOARD
MCE325
Title
MOTHER BOARD
9027624501
MCE325
DWG. NO
MOTHER BOARD MCE325
9027624501
Title
Date 7/23/01
Title D \TEMP\SD6246 01A.cal
Time 05 19 08 PM
